JPH11159827A - Heat storage equipment add operating method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable effective use of electric power in a heat storage time zone and inexpensive manufacture and operation of equipment, by a simple constitution which enables computation of a daily heat load amount for tutorial, data for preestimate of a load, without using a level sensor, and enables recognition of a stored heat amount. SOLUTION: This heat storage equipment 16 is so designed that cold heat generated by a heat source unit 17 is stored in a heat storage medium 25 held in a heat storage tank 20, and that an air-conditioning operation is executed in a prescribed time zone with the stored heat of the heat storage medium 25. Start and end of operation are controlled on the basis of an operating time program and the representative temperature of the heat storage medium 25 is measured and besides, is preestimated. The heat source unit 17 is operated according to a preestimated value of this representative temperature of the heat storage medium and stopped according to the measured representative temperature of the heat storage medium 25. An operating time determined by the operation and stoppage of the heat source unit 17 is stored, a subsequent operating time program is set through the intermediary of this storage and the heat storage equipment 16 is operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage device that performs an air conditioning operation in a predetermined time zone by storing heat of a heat storage medium and operates a heat source device according to the condition of an air conditioning load, and a method of operating the same.

[0002]

2. Description of the Related Art FIG.
FIG. 6 is a circuit diagram of a conventional heat storage device disclosed in Japanese Patent Application Publication No. 5 (JP-A-5) In the figure, 1 is an air-cooled chiller, 2 is a heat storage tank, 3 is a brine / water heat exchanger, 4 is a brine pump, 5 is a two-way valve for controlling cold water temperature, 6 is an ice making heat exchanger, and 7 is a microcomputer. A control device that controls the entire ice storage unit,
8 is a cold water pipe, 9 is a brine pipe.

[0003] Further, 10 is an outside air temperature measuring device, 11 is a first chilled water temperature measuring device for measuring the inlet / outlet temperature of chilled water, 12 is a second chilled water temperature measuring device for measuring the inlet / outlet temperature of chilled water, and 13 is the inside of the heat storage tank 2. First thermal storage tank sensor to measure temperature and water level,
14 is a second heat storage tank sensor for measuring the temperature and water level in the heat storage tank 2, and 15 is a heat storage device constituted by an ice heat storage unit.

The outputs of the outside air temperature measuring device 10, the first chilled water temperature measuring device 11, the second chilled water temperature measuring device 12, the first heat storage tank sensor 13, and the second heat storage tank sensor 14 are controlled by the control device 7.
Is input to Further, the control device 7 is provided with a neuro control function for performing load prediction based on these input values.

[0005] The conventional heat storage device is configured as described above,
The operation is performed as described below. That is, similarly to a normal ice heat storage unit, 8:00 to 18:00 of the day is set as the air-conditioning time zone, and 22 o'clock to 8:00 of the next day is set as the heat storage time zone. And it is controlled as follows by such a setting.

That is, the heat load of the day is predicted at 8:00 by a neuro-technique using the teacher data from the lowest temperature between 00:00 and 8:00 before the air conditioning time zone. Further, considering the peak cut time period from 13 o'clock to 15 o'clock, the operation time of the chiller is determined so as to cover the entire load amount without operating the chiller during that time.

At this time, (1) chiller operating time = [(daily load forecast amount) × 0.
8] -Amount of heat storage] / (chiller cooling capacity) (2) Operation start time is set as air conditioning start time.

[0008]

In the conventional heat storage device as described above, the amount of heat stored at each time is calculated from the water level in the heat storage tank 2 and the heat load at each time is calculated from the calculated amount and the cooling capacity of the air-cooled chiller 1. Is calculated, and this is integrated to calculate the daily heat load. Therefore, an expensive second heat storage tank sensor 14, that is, a water level sensor is required for calculating the daily heat load amount as the load prediction teacher data and grasping the heat storage amount,
There is a problem that the manufacturing cost of the heat storage device increases.

Further, since the conventional heat storage device is controlled on the premise that the load pattern of the day has only one peak during the air-conditioning time period, a sharp peak occurs several times a day. There is a problem that it is not possible to sufficiently reduce the output of the heat source device for a load that does.

[0010] Further, the conventional heat storage device only controls a heat source device which is designed integrally with the ice heat storage tank as a heat source device. Therefore, the ice heat storage device and the absorption type chiller / heater, the turbo chiller, and the air-cooled heat pump chiller are used. For the operation control of the heat source system having such a configuration, a separate control device has to be installed, and there is a problem that the entire air conditioning system becomes expensive.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. A heat storage device and a heat storage device capable of calculating a daily heat load amount for load prediction teacher data without a water level sensor and capable of grasping a heat storage amount. The object is to obtain a method of operating the device.

[0012]

In the heat storage device according to the present invention, the cooling / heating heat generated by the heat source unit is stored in the heat storage medium accommodated in the heat storage tank, and the air conditioning operation is performed in a predetermined time zone by the heat storage of the heat storage medium. For the heat storage device, the operation start and the operation end are controlled based on the operation time plan, the heat storage medium representative temperature determination function for determining the representative temperature of the heat storage medium, and the heat storage medium representative temperature prediction function for predicting the heat storage medium representative temperature. ,
A heat source device operation control function that controls the operation of the heat source device based on the predicted value of the heat storage medium representative temperature prediction function, a heat source device stop control function that stops the operation of the heat source device based on the determination value of the heat storage medium representative temperature determination function, a heat source device operation A control device having an operation time actual value storage function for storing the operation time by the control function and the heat source device stop control function, and an operation time plan setting function for setting the next operation time plan through the storage of the operation time actual value storage function Is provided.

Further, in the heat storage device according to the present invention, the cooling / heating heat generated by the heat source device is stored in the heat storage medium accommodated in the heat storage tank, and the air conditioner is operated in a predetermined time zone by the heat storage medium. The start and end of operation are controlled based on the operation time plan, the representative temperature of the heat storage medium is determined, the representative temperature of the heat storage medium is predicted, and the heat source device is operated based on the predicted value of the representative temperature of the heat storage medium. The heat source device is stopped according to the representative temperature determination value, the operation time of the operation and stop of the heat source device is stored, and the next operation time plan is set via this storage to operate the heat storage device.

Further, in the heat storage device according to the present invention, the heat source device operation time determination function for determining the actual operation time of the heat source device in one day and the heat source device operation for storing the actual operation time of the heat source device in one day A control device is provided which has a time actual value storage function and has an operation time plan setting function for setting the next operation time plan via the storage of the heat source unit operation time actual value storage function.

Further, in the heat storage device according to the present invention, the cooling / heating heat generated in the heat source device is stored in the heat storage medium accommodated in the heat storage tank, and the air conditioner is operated in a predetermined time zone by the heat storage medium. The start and end of the operation are controlled based on the operation time plan, the heat storage medium representative temperature determination function for determining the representative temperature of the heat storage medium, the heat storage medium representative temperature prediction function for predicting the heat storage medium representative temperature, and the heat storage medium representative temperature prediction Heat source unit operation control function that controls the operation of the heat source unit based on the predicted value of the function, heat source unit stop control function that stops the operation of the heat source unit based on the judgment value of the heat storage medium representative temperature judgment function, heat source unit operation control function, and heat source unit stop An operation time plan value storage function for storing an operation time plan value based on the control function, a heat source device operation time determination function for determining the actual operation time of the heat source device for one day, The actual operation time of the heat source unit is stored.The actual operation time of the heat source unit is stored.The external condition determination function is used to determine the external condition including the outside air temperature that has a strong correlation with the load. Either one of an external condition determination value storage function of storing the external condition determination value storing function of calculating the predicted value of the external condition on the same day, and an external condition input function of inputting the predicted value of the external condition on the same day. A learning function for learning the relationship between the difference between the planned value and the actual value of the operation time of the heat source unit for the past several days stored after the operation of the day and the judgment value of the external condition, and the learning result of this learning function A control device having an operation time plan value calculation function for calculating the operation time plan value of the heat source unit on the day based on either the actual value of the external condition or the predicted value of the day based on the operation time is provided.

Further, in the heat storage device according to the present invention, the load-side outlet temperature from the heat storage tank is determined as the representative temperature of the heat storage medium.

In the heat storage device according to the present invention, the temperature of the heat storage medium at a predetermined position in the heat storage tank is determined as the representative temperature of the heat storage medium.

Further, in the heat storage device according to the present invention, the operation plan of the heat source unit is set up in advance in the air conditioning time period excluding the peak cut time period based on the operation time plan value of the heat source unit. And a control device having a control function of operating / stopping the heat source device.

Further, in the heat storage device according to the present invention, there is provided a control device having a calculation function for calculating the planned operation time of the heat source unit into the heat storage time zone and the air conditioning time zone, respectively.

Further, in the heat storage device according to the present invention, a calculation function for separately calculating the planned operation time of the heat source unit into the heat storage time zone and the air conditioning time zone, and the operation time in the heat storage time zone is maximized. In addition, a control device having a setting function of setting an operation time plan value in consideration of a difference between the capacity of the heat source device in the heat storage time zone and the capacity of the heat source device in the air conditioning time zone is provided.

In the heat storage device according to the present invention, it is determined that the heat storage amount is insufficient when a prediction result that the load-side outlet temperature from the heat storage tank becomes equal to or higher than a predetermined set temperature at the end of air conditioning is obtained. In addition, a control device having a control function of forcibly operating the heat source unit during the air conditioning time period after the planned operation time of the heat source unit is used up is provided.

Further, in the heat storage device according to the present invention, it is determined that the heat storage amount is insufficient when a prediction result that the load-side outlet temperature from the heat storage tank becomes equal to or higher than the first set temperature at the end of air conditioning is obtained. During the air-conditioning period after the planned operating time of the heat source unit is exhausted, the heat source unit is forcibly operated, and the load-side outlet temperature from the heat storage tank is equal to or lower than the second set temperature at the end of air conditioning during the forced operation. And a control device having a control function of terminating the forced operation when a prediction result indicating that the condition is satisfied is obtained.

Further, in the heat storage device according to the present invention, the heat storage amount is determined when the predicted result that the load-side outlet temperature from the heat storage tank becomes equal to or higher than the first set temperature at the end of air conditioning is obtained a plurality of times in succession. Judging that it is insufficient, the heat source unit is forcibly operated during the air conditioning time period after the operation time plan value of the heat source unit has been used up, and the temperature of the load side outlet from the heat storage tank at the end of air conditioning during the forced operation is continued. A control device is provided which has a control function of terminating the forced operation when a prediction result that the temperature becomes equal to or lower than the second set temperature is obtained continuously plural times.

Further, in the heat storage device according to the present invention, the predicted value of the load-side outlet temperature from the heat storage tank at the end of air conditioning, which is the representative temperature of the heat storage medium, is the actual measured value at the current time and several minutes before. It is calculated by linear interpolation from points.

Further, in the heat storage device according to the present invention, when the remaining time until the air conditioning end time in the air conditioning time period becomes shorter than the remaining ice determination time, the temperature of the load-side outlet from the heat storage tank is detected as remaining ice. When the temperature is equal to or lower than the predetermined value and the operation planning time of the heat source device is not used up, a control device having a control function of determining that heat storage is excessive and stopping the heat source device regardless of the planned operation time of the heat source device is provided. .

Further, in the heat storage device according to the present invention, based on the predicted value of the outside air temperature and the temperature of the load side outlet from the heat storage tank, the difference between the integrated value of the capacity of the heat source unit in the heat storage time zone and
Difference in the accumulated value of the capacity of the heat source unit during the air-conditioning period, the difference between the reference day of the difference in the residual heat storage amount before and after the operation before and after the day, and the reference date of the accumulated value of the air-conditioning heat load due to the outside air temperature difference during the air-conditioning period And a control device having a setting function of predicting the difference between the day and the day and setting the planned operating time of the heat source unit on the day immediately before the start of the heat storage time zone.

In the heat storage device according to the present invention, the predicted value of the outside air temperature is set as the average value of the heat storage time zone and the average value of the air conditioning time zone.

Further, in the heat storage device according to the present invention, the predicted value of the average of the outside air temperature heat storage time zone and the average of the air conditioning time zone is the average of the previous day's outside air temperature heat storage time zone and the average of the air conditioning time zone. It is set as an actual measurement value.

Further, in the heat storage device according to the present invention, at any time of the day, the heat storage of the heat source unit is performed based on one of the predicted value and the actual value of the outside air temperature and the load-side exit temperature from the heat storage tank. Difference in capacity integrated value in the time zone, difference in capacity integrated value in the air conditioning time zone of the heat source unit, difference between reference day and day of the remaining heat storage difference before and after operation of one day, and difference in outside air temperature in the air conditioning time zone A setting function that predicts or measures the difference between the reference date of the air-conditioning heat load integrated value and the difference of the day, and sets the planned operation time of the heat source device based on the measured value of the operation time of the heat source device until the above-mentioned arbitrary time on the day. Is provided.

In the heat storage device according to the present invention, the arbitrary time is set to 8:00 am, 10:00 am and noon.

Further, in the heat storage device according to the present invention, when the heat storage device is detected by the ice thickness sensor, the heat source device is forcibly stopped, the planned operation time of the heat source device is reduced, and the heat source device is corrected. A control device having a control function of continuing to stop the heat source device for a predetermined time until the operation is restarted is provided.

In the heat storage device according to the present invention, the difference between the current day and the reference date of the average value of the air-conditioning time zone of the outside air temperature, which is an external condition strongly correlated with the load, and the load on the reference day are used as a reference. The relationship between the operation time of the heat source unit corresponding to the increase and decrease of the load on the day is learned every day from immediately after the end of the air-conditioning period until the operation time plan value of the heat source unit on the next day is calculated. In addition, a control device having a calculating function of calculating an operation time plan value based on a predicted value of an average value of an air conditioning time period of the outside air temperature of the day when the operation time plan value is calculated immediately before the start of the daily heat storage time zone is provided.

Further, in the heat storage device according to the present invention, a heat storage time zone in which the heat source device is operated a plurality of times a day and heat is stored in the heat storage tank, and the heat source device is operated a plurality of times a day is set. A chase time period for suppressing the amount of heat storage in the heat storage tank using the return heat storage medium from the load of the heat source device and a peak cut time period for prohibiting the operation of the heat source device are provided. The heat source unit is controlled according to the load condition, and the heat storage operation by the heat source unit is started when the load becomes smaller than a predetermined value, and the heat storage operation is terminated when the load becomes larger than the predetermined value. In this manner, a heat storage utilization operation and a chasing operation for suppressing the amount of heat storage in the heat storage tank using the return heat storage medium from the load of the heat source device are performed.

Further, in the heat storage device according to the present invention, the heat source device is operated based on the daily operation time plan value, and the heat storage amount of the heat storage tank corresponding to the heat source device at the end of the air conditioning operation for one day is zero. At the end of the day, the planned operating time for the day is continued on the next day.If there is excess heat storage at the end of the air conditioning operation for the day, the planned operating time for the next day is reduced, and the air conditioning operation for the day ends. When the heat storage amount is insufficient at the time, the operation is performed to increase the operation time plan value for the next day.

Further, in the heat storage device according to the present invention, the outlet temperature of the heat storage tank corresponding to the heat source device operated based on the operation time plan value is verified at predetermined time intervals, and the air conditioning operation for one day is completed. The outlet temperature at the time point is predicted, and when the predicted result that the outlet temperature at the time of the end of the air-conditioning operation becomes equal to or higher than the first set temperature is continuously three times, the stopped heat source unit is forcibly operated. When the prediction result that the outlet temperature at the time of the end of the air conditioning operation becomes equal to or lower than the second set temperature is repeated three times, an operation for terminating the forced operation of the heat source device is performed.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 3 are diagrams showing an example of an embodiment of the present invention. FIG. 1 is a circuit diagram of a heat storage device, and FIG. 2 shows a state of a forced operation of a heat source device when the heat storage device of FIG. FIG. 3 is a graph illustrating the determination of insufficient heat storage of the heat storage device of FIG. In the figure,
16 is a heat storage device composed of an ice heat storage unit, 17 is a heat source unit, 18 is a brine heat exchanger built in the heat source unit 17,
19 is a water heat exchanger built in the heat source unit 17, and 20 is a heat storage tank composed of an ice heat storage tank.

21 is a brine pump, 22 is a load side heat exchanger, 23 is a pump for supplying cold / hot water to the load from the ice heat storage tank 20 side, 24 is a three-way valve, 25 is a heat storage medium made of water,
Reference numeral 26 denotes a brine pipeline connected to the brine heat exchanger 18 and provided with a brine pump 21. In addition,
A part of the brine pipe 26 is connected to the heat exchanger 27 in the heat storage tank 20.
Is formed and connected to the brine pump 21 to form a brine circuit.

Reference numeral 28 denotes the water heat exchanger 19 and the load side heat exchanger 2
A first water pipe provided between the two outlets, 29 is a second water pipe provided between the water heat exchanger 19 and the second port of the three-way valve 24, and 30 is a part of the second water pipe 29. In the third water pipe provided between the heat storage tanks 20, a part or all of the water from the load side heat exchanger 22 is returned to the heat storage tank 20. 31 is a fourth water pipe provided between the outlet of the heat storage tank 20 and the first port of the three-way valve 24, and 32 is a first water temperature sensor provided in the middle of the fourth water pipe 31.

Reference numeral 33 denotes a fifth water pipe provided between the third port of the three-way valve 24 and the inlet of the load-side heat exchanger 22. A pump 23 and a second water temperature sensor 34 are arranged in the middle to constitute a water circuit. doing. Reference numeral 35 denotes an outside air temperature sensor arranged in the heat storage device 16, and reference numeral 36 denotes an ice thickness sensor for detecting the ice thickness of the heat exchanger 27.

A control device 37 controls the operation of the heat storage device 16. Reference numeral 38 denotes a load-side control device which controls the opening of the three-way valve 24, that is, the load-side return water passing through the water heat exchanger 19, so that the temperature of the second water temperature sensor 34 on the load-side heat exchanger 22 becomes a predetermined value. And the mixing ratio of water at the outlet of the heat storage tank 20 is controlled.

In the heat storage device configured as described above, the cold heat generated by the heat source unit 17 is supplied to the brine pump 2.
1 and the brine in the brine line 26
It is transmitted to the heat exchanger 27 within 0. In the case of cold heat storage, the heat storage medium 2 serving as a heat storage medium is provided around the heat storage tank 20.
The heat storage medium 5 is stored by freezing a part of the heat storage medium or, in the case of thermal heat storage, by raising the temperature of the heat storage medium 25 as the heat storage medium in the heat storage tank 20 in which the heat exchanger 27 is installed.

The cold or warm heat stored in the heat storage tank 20 transfers the heat storage medium 25 to the fourth water pipe 31 and the pump 23.
Is supplied to the air-conditioning load side via the load side heat exchanger 22
As a result, a cooling action or a heating action is generated. A part of the heat storage medium 25 which generates a cooling action or a heating action in the load side heat exchanger 22 and returns to the heat storage tank 20 via the water heat exchanger 19, and the other part via the three-way valve 24. 20 and again merges with the heat storage medium 25 supplied from the load side heat exchanger 22.
Supplied to

At this time, by operating the heat source unit 17 and appropriately cooling or heating the heat storage medium 25 refluxed in the water heat exchanger 19, the amount of heat stored in the heat storage tank 20 can be suppressed to reduce consumption. It is set as a target to control the heat storage device 16 so that the heat storage amount becomes exactly zero at the end of the air conditioning.

The heat source unit 1 is installed inside the control device 37.
7, an operation time plan value storage unit that stores the operation time plan value, an operation time measurement unit such as a timer counter that measures the actual operation time of the heat source unit 17 for one day, and an actual day of the heat source unit 17 for one day. An operation time actual value storage unit for storing the operation time;
An outside air temperature measurement value storage unit that stores a measurement result of the outside air temperature sensor 35 is provided.

Next, the heat storage device 1 configured as described above
As an operation example of No. 6, a case of cooling which supplies cold water to an air conditioning load will be described. Note that, here, the air-conditioning time zone is from 8:00 to 18:00 a day, the heat storage time zone is from 22:00 to 8:00 the next day, and the day is 20 The description will be made from 2:00 to 22 o'clock and the peak cut time zone is from 13 o'clock to 15 o'clock. At this time, the operable time of the heat source unit 17 is Xnmax = 10 [hours] in the heat storage time zone and Xdmax = 8 [hours] in the air conditioning time zone.

First, the daily operation time plan value of the heat source unit 17 is stored in a heat storage time zone (Xnt [hour]) and an air conditioning time zone (Xdt).
[Time]). The operating time plan value is
From this, the operation time plan value of the heat source device 17 is calculated immediately before the start of the heat storage time zone on the day (hereinafter, referred to as the current day) for which the calculation is to be performed. In other words, the planned operation time of the heat source device 17 on the day (heat storage time zone / air conditioning time zone) is calculated as the actual operation time value of the heat source device 17 on a later-described reference day (heat storage time zone Xnr [hour]) /
Air conditioning time zone Xdr [hour])

Xnt = Xnr (1) Xdt = Xdr (2) However, in the case of Xnt <Xnmax and Xdt> 0, the operation of the heat source unit 17 during the air conditioning time period can be shifted during the heat storage time period.

DXn = Xnmax−Xnt (3) The following is set. That is, (1) when Xdt> DXn × RQ, Xnt = Xnmax (4) Xdt = Xdr−DXn × RQ (5)

(2) When Xdt ≦ DXn × RQ, Xnt = Xnr + Xdr / RQ (6) Xdt = 0 (7) where, RQ: day / night capacity ratio of heat source device 17 (capacity of heat storage time in heat storage time zone) / (Air conditioning time zone air conditioning time capability).

In general, the characteristics of the refrigeration cycle are that the lower the outside air temperature is, the easier the performance is to be obtained.
3, the capacity exhibited by the heat exchanger 27 of the brine used in the heat storage operation during the heat storage time zone and the capacity exhibited by the water heat exchanger 19 used in the air conditioning operation during the air conditioning time zone. Greatly differ depending on the difference in the evaporation temperature of the refrigerant. For this reason, it is necessary to correct the capacity ratio by the RQ. However, when the capacity of the heat source unit 17 during the heat storage operation and the capacity of the heat source unit 17 during the air-conditioning operation are not so different as to cause a problem, it is possible to apply RQ = 1 and to use the above-described formulas 5 and 6.

The above-mentioned reference date is defined as follows. That is, the control device 37 classifies and defines calendar days for each day of the week on a weekly basis. For example, heavy load days,
For example, a weekday including Monday to Friday excluding holidays is a day group A, a medium load day, for example, a Saturday group excluding a holiday is a day group B, a low load day, for example, a Sunday and a holiday is a day group C, and a unique load day, for example, a user setting. Event days are classified as day group D. Then, reference dates are set according to these classifications.

As the reference date, for example, a group of the same day of the week is set for each classified reference date. Therefore, in this example, the reference date is set to Monday for Tuesday, the previous Friday for Monday, and the previous Sunday or the latest holiday for Sunday. Also, for example, in a store where Wednesday is a regular holiday,
It is also possible to set Saturday and Sunday as day group A, Monday, Tuesday, Thursday and Friday as day group B, and Wednesday as day group C.

When calculating the planned operation time on the first day, the newly installed heat storage device 16 uses the heat source unit 17 on the reference day.
Because there is no actual operation time measurement data, for example, a heat storage time zone Xnt = 10 and an air conditioning time zone Xdt = 8 are set in advance as initial values. In addition, even when there is no actual measurement data of the operation time of the heat source device 17 on the reference day on the first Saturday and Sunday after the start of operation, the preset value is used as the planned operation time. Needless to say, these set values may be input in advance as initial values of the actual operation time values on the reference day.

The planned operating time Xnt of the heat source unit 17
Based on [time] and Xdt [time], the heat source unit 1
The operation schedule of Step 7 is set, and the heat source unit 17 is operated according to the operation schedule. Then, in the case of the initial values shown in the above-described example, the operation of the heat source device 17 is scheduled at all times of the heat storage time zone and the air conditioning time zone other than the peak cut time zone.

If it is determined that the heat storage is insufficient during the scheduled operation, the heat source unit 17 is forcibly operated after the scheduled operation time of the heat source unit 17 has been used up. When it is determined that the heat storage is excessive, the heat source unit 17 is forcibly stopped even if the planned operation time of the heat source unit 17 remains. Hereinafter, the method of determining the insufficient heat storage and the corresponding measures, and the method of determining the excessive heat storage and the corresponding measures will be described. That is, the lack of heat storage is determined from the tendency of the water temperature change in the heat storage tank 20 described below. A method of the determination and a method of controlling the heat source device 17 when the heat storage is insufficient will be described with reference to FIGS. Note that the detection value of the first water temperature sensor 32, that is, the heat storage tank 20
Is the representative temperature of the heat storage medium 25.

(1) Method of judging insufficient heat storage The outlet temperature of the heat storage tank 20 is sampled at certain time intervals, and the air-conditioning end time, for example, the heat storage tank 20 at 18 o'clock.
Predict outlet temperature. The time interval at this time is, for example, 10
And the prediction of the outlet temperature of the heat storage tank 20 is performed by, for example, linear interpolation. In addition, as the prediction method, a generally well-known method such as a method using a time series model, a chaos theory, or a method using a neural network can be applied.

In the time period other than the peak cut time period, when the planned operating time Xdt of the heat source unit 17 is completely used, the outlet temperature of the heat storage tank 20 at the time of the end of the air conditioning becomes equal to or higher than the first set temperature. When the prediction result is obtained three times in a row, it is determined that the heat storage amount is insufficient. The first set temperature may be changed so as to increase as the remaining time until the air conditioning end time decreases. It is also possible to set a constant value, for example, 9 ° C. for simplification.

(2) Heat source unit 1 when insufficient heat storage is determined
7 Control Method When it is determined that the heat storage amount is insufficient, the heat source device 17 is forcibly operated. Also, during this forced operation, as described above,
Predict the outlet temperature of the heat storage tank 20 at the end of the air conditioning, and if the prediction result that the predicted value becomes equal to or lower than the second set temperature is obtained three times in a row, the forced operation is terminated, and the forced operation is stopped. Stop the heat source unit that was located. In addition, this second set temperature also
It may be changed so as to increase as the remaining time until the air conditioning end time decreases. It is also possible to set a constant value, for example, 7 ° C. for simplification.
However, it is set as the second set temperature> the first set temperature.

Also, the excess of heat storage is determined by the temperature of the outlet of the heat storage tank 20. (3) Judgment method of excessive heat storage When the remaining time in the air conditioning
For example, when the remaining time is 2 hours, the outlet temperature Tst of the heat storage tank 20 is substantially 0 [° C], for example, Tst ≦ 0.5 [°
C], and the operation planning time Xd of the heat source device 17
If t has not been used up yet, it is determined that the heat storage is excessive.

(4) Heat source unit 1 when excess heat storage is determined
7 Control Method When the excess heat storage is determined, the heat source device 17 is stopped ignoring the planned operation time of the heat source device 17. After this time, it is assumed that the planned operation time of the heat source device 17 has been used up. That is, the planned operation time of the heat source unit 17 on that day is replaced with the actual value up to that point. As a result, the above-described heat storage in case that the load suddenly increases thereafter and the temperature of the heat storage tank 20 outlet ends at the end of air conditioning, for example, at 18:00, and the heat storage amount is likely to be short due to exceeding the first set temperature. When the shortage is determined, the control can be started on the heat source device 17 and reliability can be ensured.

Here, a method of predicting the value of the temperature of the outlet of the heat storage tank 20 at the air conditioning end time by linear interpolation will be described with reference to a graph shown in FIG. Here, the time is represented by the heat storage operation start time, for example, the elapsed time [minutes] from 22 o'clock. Then, the temperature of the outlet of the heat storage tank 20 at the time t [minute] and the time t−τ [minute], for example, τ = 10 [minute] is Tst (t) [° C] and Tst, respectively.
(T−τ) [° C.]. Also, the remaining time from the time t [minute] to the air conditioning end time case [minute] is tzan.
Place [minutes].

[0062]

(Equation 1)

Further, a predicted value Tst (tace) of the temperature Tst (tace) at the exit of the heat storage tank 20 at the air conditioning end time.
° [° C] is obtained by the following equation (9).

[0064]

(Equation 2)

The actual operation time of the heat source unit 17 is as follows:
It is automatically measured by a timer counter or the like of the control device 37 and stored in the memory of the control device 37 for each heat storage time zone and air conditioning time zone. The actual heat source device operation time measurement value is stored in the heat source device operation time actual measurement value storage unit for each day group described above, that is, as a reference date. Next, it is used as the actual date of the reference day on which the heat source device operation time plan value is calculated.

As described above, in the embodiment shown in FIGS. 1 to 3, the heat source unit 17 is controlled by setting a schedule based on the actual operation time of the reference day based on the actual operation time value of the heat source unit. Therefore, there is no need to use an expensive water level sensor for measuring the amount of heat storage, and it is not necessary to provide a temperature sensor in the heat storage tank 20, and the first water temperature sensor 32 is provided in the fourth water pipe 31 of the heat storage tank 20. Thereby, a required action can be obtained. Therefore, the manufacturing cost of the heat storage device 16 can be reduced.

Insufficient heat storage and excessive heat storage are determined based on the temperature of the heat storage tank 20 outlet, and based on this determination, the heat source unit 17 can be controlled independently of the planned operation time. Accordingly, even if there is a large error in the planned operation time, the outlet temperature of the heat storage tank 20 at the end of the air conditioning can be kept within the target temperature range in which it can be determined that the heat storage has been used up. Therefore, the power for the heat storage time in the cheap heat storage time zone can be sufficiently used, so that the running cost can be reduced and a comfortable air conditioning operation can be obtained.

Embodiment 2 FIG. 4 is a view showing an example of another embodiment of the present invention, and is a flowchart for calculating an operation time plan of the heat source unit in the heat storage device. In addition,
The heat storage device has the same configuration as that of FIG.
Hereinafter, a method of optimally setting the planned operation time of the heat source device 17 using the outside air temperature and the exit temperature of the heat storage tank 20 will be described. That is, the actual outside air temperature at the site where the heat storage device 16 is installed is measured by the outside air temperature sensor 35 at predetermined time intervals, and the average value is calculated and stored for each heat storage time zone and air conditioning time zone.

Further, the heat storage operation start time and the air conditioning end time,
Alternatively, the outlet temperature of the heat storage tank 20 immediately before the start of the heat storage operation on the next day is measured by the first water temperature sensor 32 on the side of the heat storage tank 20 and stored. Then, the heat source unit operation time plan value (heat storage time zone X
As reference of nt [hour] and air conditioning time zone Xdt [hour]), the actual value of the heat source unit operation time on the reference day with respect to the day (heat storage time zone Xnr [hour], air conditioning time zone Xdr [hour]) is taken.

Then, the correction values ΔXn [time] and ΔXd [time] are added to the above values, and the heat storage time zone: Xnt = Xnr + ΔXn (10) The air conditioning time zone: Xdt = Xdr + ΔXd (11) However,

ΔXn: correction amount for the difference in temperature of the heat storage tank 20 at the outlet from the reference date + heat source unit 1 due to the difference in outside air temperature from the reference date
ΔXd: correction amount for the temperature difference of the heat storage tank 20 at the outlet from the reference date + correction amount for the capacity difference of the heat source unit 17 due to the outside air temperature difference from the reference date + reference date This is a correction (air-conditioning time zone) for the air-conditioning heat load difference caused by the outside air temperature difference.

Next, a method of calculating the correction values ΔXn and ΔXd will be described with reference to the flowchart shown in FIG. The control procedure shown in FIG. 4 will be described later. (1) The actual value of the heat storage time zone operation time on the reference day is the maximum value (Xn
r = Xnmax) For the operation on the reference day, if the operation time Xnr of the heat source unit 17 in the heat storage time zone is the maximum value Xnmax, the air conditioner is first set as a correction value ΔXn = 0 [hour] of the heat source unit operation time in the heat storage time zone. Only the correction value ΔXd [time] of the operation time in the time zone is obtained by the following equation 12.

[0073]

(Equation 3)

Here, subscripts, t: current day (predicted value, planned value), r: reference date (actual value) pcW: heat capacity of water in heat storage tank 20 and heat storage tank 20 itself [Mcal / ° C]

[0075]

(Equation 4)

[0076]

(Equation 5)

Tst (t): Thermal storage operation start time, for example, the temperature at the outlet of thermal storage tank 20 at time t elapsed from 22:00 [°
C]

[0078]

(Equation 6)

Is as follows. The right-hand side of Equation 13 is the difference between the reference date and the day of the difference between the remaining heat storage amount before and after one-day operation obtained from the temperature difference at the exit of the heat storage tank 20 and the current day, respectively. Difference between the reference date of the heat source unit heat storage time zone capacity integrated value due to the outside air temperature difference and the current day [Mcal] Numerator 3: Air conditioning time zone Heat source unit air conditioning time zone capacity integrated value due to the outside air temperature difference and the day of the day Difference [Mcal] Numerator 4th term: Difference between the reference date and the day of the air conditioning heat load integrated value due to the difference in outside air temperature during the air conditioning time zone [Mcal] Denominator: To the expected heat source equipment air conditioning time zone capacity [Mcal / h] on the day Yes, it is.

The coefficients a and b in the equation (17) are coefficients representing the relationship between the air conditioning time average value Tad [° C.] of the outside air temperature and the air conditioning heat load integrated value QL [Mcal]. When the data can be collected and identified, a predetermined value is set. If a = 0 and b = 0, this corresponds to the assumption that the load on the reference day is equal to the load on the current day.

Further, the coefficients c in the equations (18) and (19),
d, e and f are the capacity of the heat source unit 17 (heat storage time zone average QR
n, air conditioning time zone average QRd) [Mcal / h] and outside air temperature (heat storage time zone average Tan, air conditioning time zone average Tad)
A coefficient representing the relationship of [° C] is set in advance for each model of the heat source device 17 by a constant or a function of the heat storage medium temperature.

As the outlet temperature of the heat storage tank 20, a measured value of the time during which the pump 23 is operating is used to reduce the error. That is, for Tstr (0), the temperature of the outlet of the heat storage tank 20 immediately before or immediately after the end of the air conditioning time zone on the day before the reference is used instead. For Tstr (24), the temperature of the heat storage tank 20 outlet immediately before or immediately after the end of the air conditioning time zone on the reference day is used instead. For Tstt (0), the exit temperature of the heat storage tank 20 immediately before or immediately after the end of the air conditioning time zone on the day or the day before is used instead.

For the outside air temperature of the day, a predicted value of the average value (heat storage time zone / air conditioning time zone) is obtained from the outside air temperature prediction section. In addition, it can be manually or automatically input from outside. As a method of predicting the outside air temperature, a conventionally well-known ARMA model, a neural network, a method applying chaos theory, or the like can be used. The input from the outside may be a keyboard, a touch panel, a voice input, etc., a remote input using a telephone line or the Internet, or a wireless method.

From the above equation 12, the operation planning time of the heat source unit 17 is as follows: heat storage time zone: Xnt = Xnr = Xnmax [time] (20) Air conditioning time zone: Xdt = Xdr + ΔXd [time] (21) . Here, when Xdt ≧ Xdmax, ΔXd =
Xdmax-Xdr (Xdt = Xdmax). on the other hand,
When Xdt ≦ 0, ΔXd = −Xdr (Xdt = 0)
It is necessary to control the heat storage amount by reducing the operation time of the heat source device 17 during the heat storage time zone. At this time, the planned heat source device operating time in the heat storage time zone is calculated by using the correction value ΔXn of the following equation 22.
(<0).

[0085]

(Equation 7)

The fifth term of the numerator of the equation (22) is for correcting the amount of heat of the operation time in the air conditioning time zone of the day which is shorter than the reference day. Therefore, when Xdt ≦ 0, the planned operation time of the heat source device 17 is as follows: heat storage time zone: Xnt = Xnr + ΔXn [time] (23) Air conditioning time zone: Xdt = 0 [time] (24)

(2) In the case where the actual value of the operation time of the heat storage time zone on the reference day is not the maximum (Xnr <Xnmax) For the operation of the reference day, the operation time X of the heat source unit in the heat storage time zone
If nr is less than the maximum value Xnmax, ΔXn is first obtained from the following equation 25, contrary to the aforementioned setting means.

[0088]

(Equation 8)

Therefore, the planned operation time of the heat source unit 17 is as follows: heat storage time zone: Xnt = Xnr + ΔXn [time] (26) Air conditioning time zone: Xdt = 0 [time] (27)

However, when Xnt ≦ 0, ΔXn = −X
nr (Xnt = 0), and the heat source device 17 is not operated in the heat storage time zone and the air conditioning time zone on the day. Also, Xn
When t ≧ Xnmax, ΔXn = Xnmax−Xnr
(Xnt = Xnmax), the heat source device 17 in the air conditioning time zone
It is necessary to compensate for the shortage of heat storage by the operation of. At this time, the planned value of the heat source device operation time in the air conditioning time zone is obtained from the correction value according to the following Expression 28.

[0091]

(Equation 9)

The last term of the numerator in the equation 28 is for correcting the amount of heat generated by increasing the operation time in the heat storage time zone on the day from the reference date. Therefore, ΔXn = Xnmax−Xn
In the case of r, the planned operation time of the heat source device 17 is as follows: heat storage time zone: Xnt = Xnmax [time] (29) Air conditioning time zone: Xdt = Xdr + ΔXd [time] (30)

In order to avoid extreme output, ΔXn and ΔXd have upper limits (DXnmax, DXdmax, respectively).
) And lower limits (DXnmin, DXdmin) can be set so that values outside these ranges are not output. In this case, for example, by setting the upper limit to be smaller than the lower limit, the operation of the heat source unit 17 can be suppressed and the heat source unit operating time in the heat storage time zone can be made as long as possible. When Xnt = Xnmax, the upper limit value and the lower limit value are not applied to ΔXn, and the heat source unit 17 is operated to the maximum limit in the heat storage time zone, so that the heat storage time zone is effectively used.

The control procedure described above will be described with reference to the flowchart shown in FIG. That is, step 10
In step 1, the day of the week is determined, and in step 102, the reference day is determined. Then, in step 103, the heat storage tank 20 of the day
The internal temperature Tstt (0) [° C.] is obtained, and
4 and the temperature Tstt (0) in the heat storage tank 20 on the day and the temperature Tstr (2) in the heat storage tank 20 at the end of the operation on the previous day.
4) is input to the memory, and the actual heat source unit operating time values Xns [h] and Xds [h] of the previous day are input to the memory.

Next, at step 105, the temperatures Tstr (0) and Tstr (24) [°
C], and proceeds to step 106 to acquire the actual heat source unit operating time values Xdr and Xnr [h] on the reference day. Then, in step 107, the outside air temperature Tant, Tad
At step 108, the predicted average capacity Qrnt, Qrdt [kcal / h] of the heat source device 17 on the day is calculated. Next, in step 109, if Xnr で Xnmax, the process proceeds to step 110, and if not Xnr ≒ Xnmax, the process proceeds to step 111.

Then, in step 110, a daytime heat source unit operation time plan correction value ΔXd [h] is calculated, and in step 11
Go to 2 and Xnt = Xnmax, Xdt = Xdr + ΔXd
And put. Next, the routine proceeds to step 113, where Xdt <0.
If [h], go to step 114; otherwise, go to step 115. Then, in step 114, a nighttime heat source unit operation time plan correction value ΔXn [h] is calculated, and in step 116, Xnt = Xnmax + ΔXn, Xdt =
Set 0.

Then, the process proceeds to a step 117, wherein the actual heat source device operation time counter is reset, and Xnc = 0, Xd
Set c = 0. In step 115, Xd
If t <0.5 [h], the process proceeds to step 118; otherwise, the process proceeds to step 119. Then, step 118
And Xnt = Xnmax and Xdt = 0, and step 11
Proceed to 7.

In step 119, Xdt> Xdmax
If so, proceed to Step 120; otherwise, go to Step 1
Proceed to 17. Then, in step 120, Xdt =
Xdmax and proceed to step 117. Then, in step 111, the nighttime heat source unit operation time plan correction value ΔXn
[H] is calculated, and in step 121, Xnt = Xn
r + ΔXn, Xdt = 0 are set, and the routine proceeds to step 122. If Xnt> Xrmax, the routine proceeds to step 123, and if not, the routine proceeds to step.

At step 123, the daytime heat source unit operation time plan correction value ΔXd [h] is calculated, and the routine proceeds to step 125, where Xnt = Xnmax and Xdt = ΔXd are set, and the routine proceeds to step. In step 124, Xdt <0.
If it is 5 [h], the process proceeds to step 126; otherwise, the process proceeds to step 127. Then, at step 126, Xnt
= Xnr + ΔXn, Xdt = 0 and step 11
Proceed to 7. In step 127, Xdt> Xd
If it is max, go to step 128; if not, go to step 117. Then, in step 128, Xdt = X
dmax is set, and the routine proceeds to step 117.

As described above, in the embodiment of FIG. 4, the average value of the heat storage time zone of the outside air temperature, the actual value of the air conditioning time zone on the reference day and the predicted value of the day, the temperature of the outlet of the heat storage tank 20 on the reference day, Are set, the actual value of the heat storage start time, the actual value of the air conditioning end time, the actual value of the heat storage start time of the heat storage tank 20 outlet temperature of the day, and the target value of the air conditioning end time are set.

Then, based on these set values, the difference between the integrated capacity values of the heat storage device 17 in the heat storage time zone, the difference between the integrated capacity values of the heat storage device 17 in the air conditioning time zone, and The difference between the reference date and the current day in the heat storage amount difference and the difference between the reference date and the current day of the air-conditioning heat load integrated value accompanying the air-conditioning time zone outside air temperature difference are predicted, and the operation time plan value of the heat source unit 17 is optimally set. can do. Therefore, the nighttime electric power can be used effectively, and the peak cut of the daytime electric power can be air-conditioned without excess or shortage of the heat storage amount, so that the predetermined air-conditioning action can be maintained and the operating cost can be reduced.

In the embodiment shown in FIG. 4, the average value of the heat storage time zone and the predicted value of the average value of the air conditioning time zone are obtained with respect to the outside air temperature. The operation time of the heat source device 17 corresponding to the load is corrected. However, if the predicted value of the outside air temperature cannot be obtained, the outside air temperature of the previous day is regarded as the outside air temperature of the day, and the predicted value of the day using the average value of the outside air temperature of the previous day, that is, the heat storage time zone / air conditioning time zone. Can be controlled as

Embodiment 3 By applying the embodiment of FIG. 4 described above, the heat storage device can be easily controlled as described below. That is, as will be described later, in case that the prediction of the outside air temperature is corrected in the air-conditioning time zone, or in the case where the average outside air temperature in the average time zone of the heat storage time zone of the day is significantly different from the initial prediction, etc. Heat source unit 1 during air conditioning
7 can be modified.

That is, when the outside air temperature is predicted and the heat source unit operation time plan value is corrected at, for example, 8:00 am (j = 1), 10:00 (j = 2), and 12:00 (j = 3). The following control is performed. The correction of the heat source device operation time plan value is performed based on the above-described Expression 18.

[0105]

(Equation 10)

On the other hand, ΔTad [° C] and QRrt [Mca
l / h] who is recalculated each time the average temperature Tad _j of the day conditioning time zone again predicted at each time [° C] (j = 1, 2, 3) is obtained.

The correction value calculated at the heat storage operation start time (22 o'clock) is ΔXd ₀ , and the planned operation time is X
d ₁ , the correction value at 8:00 am is ΔXd ₁ , the planned operation time is Xd ₁ , the correction value at 10 am is ΔXd ₂ , the planned operation time is Xd ₂ , the correction value at 12:00 is ΔXd ₃ , Let the time planning value be Xd ₃ .

Xd _j = Xd _j-1 + (ΔD _j −ΔX _dj-1 ) (34) where j = 1, 2, 3 (corresponding to 8:00 am, 10:00, and 12:00 respectively) the absolute value of the difference between the previous output _{(| ΔXd j -ΔXd j-1} |; j = 1,2,3) is Xd
Only when ef [time], for example, Xdef = 0.5 or more, the operation time plan value Xd is truly corrected.

As described above, according to the control in the third embodiment, the planned operating time of the heat source unit 17 can be corrected during the air-conditioning time zone. As a result, even when the prediction of the outside air temperature is corrected during the air conditioning time period, or when the average outside air temperature during the heat storage time period of the day is significantly different from the initial prediction, the operation time plan value of the heat source device 17 is also set. Can be set again to rebuild the operation schedule of the heat source device 17. Therefore, the comfort of the air-conditioning operation can be maintained without excessive or insufficient heat storage, and the heat storage can be used up to effectively use the nighttime power of the next day.

Embodiment 4 Further, the heat storage device can be easily controlled as described below by applying the embodiment of FIG. 4 described above. That is, as described later, when the temperature of the exit of the heat storage tank 20 on the reference day or the day at the heat storage start time or the air conditioning end time is substantially 0 [° C.], and ice is considered to remain in the heat storage tank 20, Can respond.

That is, the temperature Tstt (0) ≒ 0 [° of the outlet temperature of the heat storage tank 20 at the heat storage operation start time of the day (22:00).
C], the heat storage tank 20 outlet temperature Tstr (0) ≒ 0 [° C.] at the heat storage operation start time (22 o'clock) on the reference day or the heat storage tank at the air conditioning operation end time (18 o'clock) on the reference day 20 even when the outlet temperature Tstr (24) ≒ 0 [° C.]
Control as it applies to the forms of embodiment and Embodiment 3, ΔXn, ΔXd, ΔXn _j and ΔXd _{j (j} = 1,
2, 3) is calculated.

Here, the reason why the above-mentioned value is set to ≒ 0 [° C.] is to take into account the error of the sensor and the like.
[° C] indicates the following degree. However, the temperature T in the heat storage tank 20 at the heat storage operation start time of the day (22:00)
As for sttt (0), in order to reduce the operation time of the heat source unit 17 on the day, Tstt (0) ≒ 0
In the case of [° C], Tstt (0) =-8 for convenience.
[° C] or -4 [° C] is substituted.

This is because the latent heat of water is 80 [kcal / k].
g] and 8 [° C], the sensible heat of water is 8 [kcal / kg], so the ice filling rate IPF at the heat storage operation start time (22 o'clock) is 10% or 5%. Is equivalent to the following assumption. If Tstr (24) ≒ 0 ° C., Tstr (24) = − 8 ° C. or −4 °°.
C] can be substituted.

As described above, according to the control in the fourth embodiment, at the heat storage start time or the air conditioning end time, the temperature of the outlet of the heat storage tank 20 on the reference day or the day is almost 0 [° C].
Therefore, even if it is considered that ice remains in the heat storage tank 20, the operation time plan value of the heat source device 17 is calculated as a small value by substituting a negative water temperature for convenience. For this reason, the heat storage can be used up, and the nighttime power of the next day can be effectively used.

Embodiment 5 FIG. Further, the heat storage device can be easily controlled as described below by applying the embodiment of FIG. 4 described above. That is, when the heat storage fullness is detected by the ice thickness sensor 36, the heat source unit 17 is forcibly stopped even if the planned operation time of the heat source unit 17 remains. The planned operation time of the heat source device 17 at this time is corrected as described later.

(1) When the heat storage fullness is detected during the heat storage time zone (1-1) The thermal storage time zone operation time plan value Xnt [hour] is the actual operation time until the ice thickness sensor 36 detects the heat storage fullness on the day. Xns [hour], and thereafter, the heat source device 17 is not operated during the heat storage time zone of the day. (1-2) The air-conditioning time zone operation time plan value Xdt [hour] is a coefficient α1 (0
≦ α1 ≦ 1, for example, α1 = 0.5) (Xdt ← Xdt × α1), or a preset value β1 (β1 ≧ 0, for example, β1 = 3 [hours]) Change to the subtracted value (Xdt ← Xdt−β1).

(1-3) Furthermore, Xman
1 [time] (Xman1 ≧ 0, for example, Xman1 = 2)
Until the elapse, the heat source device 17 is forcibly stopped without operating. In this example, the end time of the heat storage time zone is 8:00 am, and if the heat storage fullness is detected at 7:30 am, Xdt> 0
Then, the operation of the heat source device 17 in the air conditioning time zone starts at 10 am. It should be noted that the control is performed in such a manner that, after the heat storage fullness is detected by the ice thickness sensor 36, the ice is melted with the cold water returned from the air conditioning load for a while, and then the heat storage fullness is immediately detected again and the heat source unit 17 is detected. This is to prevent the vehicle from becoming inoperable.

(2) When the heat storage fullness is detected during the air conditioning time zone (2-1) The heat storage time zone operation time plan value Xnt [hour] is not changed. There is no point in changing it. (2-2) The air-conditioning time zone operation time plan value Xdt [hour] is a coefficient α2 (0
≦ α2 ≦ 1, for example, α2 = 0.7) (Xdt ← Xdt × α2) or a certain value β2 (β
2 ≧ 0, for example, β2 = 2 [hours]) is subtracted (Xdt ← Xdt−β2).

(2-3) Further, Xm is calculated from the heat storage fullness detection time.
an2 [time] (Xman2 ≧ 0, for example, Xman2 =
1) Until the elapse, the heat source device 17 is forcibly stopped without operating. In the fifth embodiment, Xman1 ≠
Examples of Xman2, coefficient α1 ≠ α2, and coefficient β1 ≠ β2 are shown. However, Xman1 = Xman2, coefficient α1 = α
2 or the coefficient β1 = β2.

As described above, according to the control in the fifth embodiment, when the ice thickness sensor 36 detects that the heat storage is full, the heat source unit 17 is forcibly stopped, and the planned operation time of the heat source unit 17 is reduced. Corrected in a certain direction. Further, the stop of the heat source device 17 is continued at a certain time until the operation of the heat source device 17 is restarted. Thereby, it is possible to prevent the heat source unit 17 from being inoperable by detecting the heat storage fullness immediately again, to exhaust the heat storage while maintaining the comfort of the air conditioning, and to effectively use the nighttime power. be able to.

Embodiment 6 FIG. 5 and 6 are views showing an example of another embodiment of the present invention. FIG. 5 is a process chart for explaining a procedure for utilizing the operation result of the reference day in the heat storage device for the operation plan of the day. 6 is a main part logic circuit diagram in which the relationship between the outside air temperature difference and the increase / decrease of the air conditioning load is made to correspond to the neural network. The heat storage device has the same configuration as that of FIG. Hereinafter, a method of learning the relationship between the outside air temperature and the load calorific value according to the situation at the site where the heat storage device 16 is installed and reflecting the learned value on the planned operation time of the heat source device 17 will be described.

First, as shown in FIG. 5, every day from the end of the air-conditioning period to the setting of the operation time plan value immediately before the start of the heat storage period on the next day, the increase and decrease of the outside air temperature between the current day and the reference day are performed. Learn the relationship between the increase and decrease of the air conditioning load. That is, the heat source unit operation time plan correction value for this is set as ΔXL [hour],

[0123]

[Equation 11]

The planned operation time Xdt [time] is calculated by adding the time ΔXL calculated in the above to the equation 11 described in the second embodiment. Heat storage time zone: Xnt = Xnr + ΔXn (36) Air-conditioning time zone: Xdt = Xdr + ΔXd + ΔXL (37) The coefficient A used here is set separately for each day of the week. And it shall acquire by automatic learning according to the heat load situation of the field where the heat storage device 16 was installed. The acquisition method is the following method that applies a general backpropagation method, that is, a steepest descent method in neural network learning or the like.

(1) Calculating the difference between the average temperature of the air conditioning time zone and the reference date from the actual measured value of the outside air temperature Based on the actual measured value of the outside air temperature of the day, the average temperature Tans [° C] of the heat storage time zone and the air conditioning time zone Average temperature of Tads [°
C] is calculated. The difference ΔTans [h] between the actual value of the outside air temperature on the day of the heat storage time and the actual value of the reference date and the difference ΔTad between the actual value of the outside air temperature on the air conditioning time and the actual value of the reference day.
Calculate and record s [h].

[0126]

(Equation 12)

(2) Calculation of ideal operating time plan value excluding the influence of the outside air temperature prediction error When the outside air temperature prediction is 100% accurate, the operating time plan value that does not consider the increase or decrease of the air conditioning load is Hereafter, this value is set as an ideal operation time planned value Xdtt, and Xdtt is calculated. It should be noted that the formula used in the embodiment of FIG. 4 described above is a formula that calculates the heat source unit operation time plan values Xnt and Xdt at the heat storage operation start time (22 o'clock) on the day. However,

The difference ΔTan between the current day predicted value of the heat storage time zone average temperature and the reference day actual value is replaced by the difference ΔTans between the current day actual value of the heat storage time zone average temperature and the reference date actual value. Also,
The difference ΔTad between the current day predicted value of the air-conditioning time zone average temperature and the reference day actual value is replaced with the difference ΔTads between the current day actual value of the air-conditioning time zone average temperature and the reference date actual value. Further, the temperature of the heat storage tank 20 outlet is replaced with the actual value of the heat storage tank 20 outlet temperature Tsts (24) at the end of the air conditioning on that day (eighteen o'clock).

Here, Tsts (2
In 4), although it is expected that the value is close to the target value Tb, the measured value is substituted because it does not always coincide with the target value. After performing the above preparations, the operation time ideal plan value is calculated in the following procedure. (1) The actual value of the heat storage time zone operation time on the reference day is the maximum value (Xn
r = Xnmax)

[0130]

(Equation 13)

Note that the subscript s represents a determined value calculated or directly measured from the actual outside air temperature value of the day. In the embodiment of FIGS. 5 and 6, a coefficient a representing the relationship between the air-conditioning time period average value Tad of the outside air temperature and the air-conditioning heat load integrated value QL is hereinafter described.
= 0. The ideal plan value of the heat source unit operation time is as follows: Heat storage time zone: Xntt = Xnr = Xnmax (41) Air conditioning time zone: Xdtt = Xdr + ΔXdtt (42) However, when Xdtt ≧ Xdmax, ΔXdtt = Xd
max−Xdr When Xdtt ≦ 0, ΔXdtt = −Xdr,

[0132]

[Equation 14]

Accordingly, the operation time of the heat source unit in the heat storage time zone is reduced. Therefore, the ideal operating time plan value of the heat source unit 17 is calculated as follows: heat storage time zone: Xntt = Xnr + ΔXntt (44) air conditioning time zone: Xdtt = 0 (45)

(2) When the actual value of the operation time in the heat storage time zone on the reference day is not the maximum value (Xnr <Xnmax)

[0135]

(Equation 15)

Thus, the ideal planned operating time of the heat source unit 17 is as follows: heat storage time zone: Xntt = Xnr + ΔXntt (47) air conditioning time zone: Xdtt = 0 (48)

However, when Xntt ≦ 0, ΔXntt
= −Xnr Xntt ≧ Xnmax, ΔXntt = Xnmax−X
nr,

[0138]

(Equation 16)

Thus, the operation time of the heat source unit in the air conditioning time period is extended. Therefore, the ideal operating time plan value of the heat source unit 17 is as follows: heat storage time zone: Xntt = Xnr = Xnmax (50) air conditioning time zone: Xdtt = Xdr + ΔXdtt (51)

(3) Calculation of the difference between the actual value of the heat source unit operation time on the day and the ideal operation time plan value The actual value of the heat source unit operation time on the day, ie, the heat storage time zone Xn
s [h], the air-conditioning time zone Xds [h], and the ideal plan value calculated in the above (2), that is, the heat storage time zone Xntt [h] and the air-conditioning time zone Xdtt [h]. The difference reflects the load condition at the site where the heat storage device 16 is installed, that is, the relationship between the outside air temperature and the load in the operation time of the heat source device, and this is ΔXL.

[0141]

[Equation 17]

(4) Learning the relationship between the outside air temperature and the load A method for learning the coefficient A in the above equation 35 will be described below. That is, at the time when the operation of one day on a certain day is completed, the operation results for n days of the same day including the current day are recorded for the items shown in the list of recording data of the heat storage device before learning in Table 1. Have been.

[0143]

[Table 1]

First Step Assuming that the initial value A = 0, Xntt _i [h], Xdtt _i [h], ΔXL
_i [h] (i = 1, 2, 3,... n) is calculated.

[0145]

[Table 2]

Further, dummy variables ΔXL _j ′ (j = 1, 2, 3,..., N) shown in the list of learning dummy variables in Table 3 are prepared.

[0147]

[Table 3]

Then, the initial value ΔXL _j ′ = 0 (j = 1,
2, 3,... N).

Second stage As shown in FIG. 6, when the above equation 35 is made to correspond to a neural network, the learning of the resulting weight A by the backpropagation method is well known.

[0150]

(Equation 18)

Is performed. Here, ε is a fixed value.
Also,

[0152]

[Equation 19]

Since f (x) = x in the case of the embodiment of FIGS. 5 and 6, f ′ (x) = 1.

Third Step Next, A is replaced with A + ΔA,

[0155]

(Equation 20)

Is calculated. Fourth Step Returning to the second step, ΔA is calculated using ΔXL _j ′ obtained in the third step. Then, the third step is calculated again.

Fifth Step As described above, the second step and the third step are repeated, and the evaluation function representing the following error is obtained.

[0158]

(Equation 21)

The learning ends when ΔA が 0 becomes smaller to some extent and no longer smaller, that is, ΔA ≒ 0.

Thus, the heat source units 1 for the past several days
7, the relationship of ΔXL = A · ΔTad can be learned. Then, when calculating the operation time plan value of the day using the result, the predicted value Tadt [° C] of the outside air temperature average value in the air conditioning time zone on the day and the actual outside air temperature average value in the reference day air conditioning time zone are calculated. Difference from value Tadr [° C] ΔTadt = T
From adt-Tadr [° C], it is calculated as ΔXL = A · ΔTadt. Then, by substituting this into the above-described equation 37, the operating time plan value can be calculated.

As described above, in the embodiment of FIGS. 5 and 6, the difference ΔTad between the current day and the reference day of the average value of the air-conditioning time zone of the outside air temperature, which is an external condition strongly correlated with the load,
The relationship between [° C] and the operation time ΔXL [hour] of the heat source device 17 corresponding to the increase / decrease of the load on the day with reference to the load on the reference day is expressed by the past heat source device on which the heat storage device 16 is installed. The learning is performed according to the 17 driving situations.

Thus, when calculating the planned operation time immediately before the start of the daily heat storage time zone, by inputting the predicted value of the average value of the air-conditioning time zone of the outside air temperature of the day, the load status of the day is compared with the reference date. An operation time plan value predicted in the comparison can be calculated. As a result, the nighttime electric power can be used effectively, and the peak power of the daytime electric power can be air-conditioned without excess or deficiency of the heat storage amount, so that the required air-conditioning action can be maintained and the operating cost can be reduced.

The heat capacity of the heat storage tank 20 and the heat source unit 17
Even if there is an error in the set value used when calculating the heat source device operating time plan value, such as the capacity coefficient of the heat source device, it is possible to collectively learn the errors including these errors. Therefore, the heat source unit 17
It is possible to automatically cope with a change in the water amount due to a secular change of the capacity, evaporation of the water or condensation of the moisture in the atmosphere, and it is possible to always calculate an optimal operation plan time value.

In the embodiments shown in FIGS. 5 and 6, a learning method using the error back propagation method of the neural network, that is, the steepest descent method is shown. However, a similar effect can be obtained by learning the relationship between the outside air temperature and the load using a method other than this, for example, the least square method.

Further, an example has been shown in which the relationship with the air conditioning load is learned between the outside air temperature and the average value of the air conditioning time zone. However, during the day, the highest value of the outside temperature, that is, the highest temperature or the lowest value of the outside temperature, that is, the lowest temperature, relative humidity,
Various external conditions centering on weather conditions such as the amount of solar radiation, wind speed, probability of precipitation, weather information, day of the week, month and day can be used.

Further, even if learning is performed with too much data, the influence of the distant past outside air temperature-load relationship appears, and it becomes meaningless. Therefore, the number of recorded data is about 10 days on weekdays,
Saturday and Sunday should be about 4 days. Furthermore, the number of recorded data may be changed to about seven days in midsummer when the load is relatively stable, and about twenty days in the middle period when the load fluctuates greatly.

By controlling in this manner, the accuracy of learning can be ensured while the total learning time per year is reduced as much as possible. The coefficient A is set separately for each day group. Further, FIG.
In the embodiment of FIG. 6, the increase and decrease of the outside air temperature and the increase and decrease of the air conditioning load are assumed to have a linear relationship, that is, f (x) = x. However, by using a non-linear function such as a sigmoid function, the outside air can be changed in an intermediate period or the like. It is possible to better learn the characteristics at the time when the tendency of the change in the temperature and the change in the air conditioning load change.

Next, features and precautions of the method shown in the embodiment of FIGS. 5 and 6 will be enumerated. ΔXL corresponds to the teacher data, and has a learning speed according to the magnitude of the error (ΔXL−ΔXL ′). Further, the number n of the recorded data may be any number equal to or more than one. Further, as the number (j) of the teacher data increases and as ε decreases, the learning time increases. Conversely, if ε is too large, learning does not converge well.

In general, if ε is not large enough to some extent, learning may not proceed due to a local minimum, that is, a local minimum, but in the embodiment of FIGS. 5 and 6, the conversion function is f (x) = Since there is a linear relationship with x, there is no such concern. The value of ε is ΔTad, Δ
Since it depends on the size of XL and the number of learning data, it is better to normalize ΔTad and ΔXL to 0 to 1 or −1 to 1.

Embodiment 7 FIG. In each of the embodiments shown in FIGS. 1 to 6, the heat storage tank 20 using water as the heat storage medium is used.
Has been described as the heat storage device 16 in which is installed. However, the embodiments shown in FIGS. 1 to 6 can be easily applied to a water heat storage system generally used for large-scale air conditioning applications, and also to a heat storage device using a latent heat other than water and a sensible heat medium. Thus, the same operation as obtained in each of the embodiments shown in FIGS. 1 to 6 can be obtained. In addition, the present invention can be easily applied to a heat storage device or a hot water supply system that stores not only cold heat but also warm heat, and can obtain the same effect obtained in each of the embodiments shown in FIGS.

Embodiment 8 FIG. FIG. 7 is a circuit diagram of a heat storage device showing an example of another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 described above denote corresponding parts, and reference numeral 39 denotes a first water temperature sensor provided in the heat storage tank 20. In addition,
The detected value of the first water temperature sensor 39, that is, the temperature at a predetermined position in the heat storage tank 20, is set as the representative temperature of the heat storage medium 25. In the heat storage device 16 shown in FIG. 1 described above, the outlet temperature of the heat storage tank 20 is detected by the first water temperature sensor 32. Since the temperature is measured in the flow while the load-side pump 23 is operating, the error is reduced.

However, in the heat storage device 16 configured as shown in FIG.
The same operation as that of the heat storage device 16 shown in FIG. Then, in the configuration shown in FIG. 7, the temperature in the heat storage tank 20 can be detected even when the pump 23 on the load side is not operating.

Further, the present invention can be easily applied to a heat recovery type heat storage unit which is not the chiller type shown in the first to seventh embodiments. However, in many cases, there is no stirrer in the heat storage tank 20 to make the temperature of the heat storage medium uniform, so that temperature unevenness occurs. Therefore, the first water temperature sensor 39
Depending on the installation position, there may be an erroneous detection of excess or deficiency of heat storage, so care must be taken in setting the set value of the first water temperature sensor 39 and the like.

Embodiment 9 FIG. FIG. 8 also shows an example of another embodiment of the present invention, and is a diagram for explaining the setting of the operation time zone of the heat storage device. FIG. 8 shows an example of a case where the output of the heat source unit is reduced for a load where a sharp peak occurs several times a day. The operation will be described.

In the ninth embodiment, the heat storage time period in which the brine heat exchanger of the heat source unit is operated to store heat in the heat storage tank is set a plurality of times a day. In addition, a chase time period for operating the water heat exchanger of the heat source unit and pre-cooling or pre-heating the return heat storage medium from the load to suppress the amount of heat storage in the heat storage tank is set a plurality of times a day. For example, in the conventional heat storage device, one day is 22:00.
8, the day is set to 0:00 to 0:00 and the heat storage time zone is set to 0:00 to 2:00 in FIG.
6:00, 8:00 to 12:00 and 16:00 to 1
8:00 is defined.

In addition, the chase time zone is set between 6:00 and 8: 0.
0, 12:00 to 14:00 and 18:00 to 24: 0
Defined as 0. Further, a peak cut time zone to be described later is defined as 14:00 to 16:00. In this way, the day is defined as 24 hours from the time when one chasing time zone ends and the next heat storage time zone starts. That is, in Embodiment 9, one day always starts in the heat storage time zone and ends in the chase time zone or the peak cut time zone.

Although the ninth embodiment does not particularly provide a time zone that is neither the heat storage time zone, the chasing time zone nor the peak cut time zone, such a time zone is included in the chasing time zone or the peak cut time zone. I will consider it.
Further, the first to m-th time zone names and the priority of the operation of the heat source device in each time zone are set for each time zone.

That is, in the example of FIG. 8, m = 7, and the heat storage unit operation priority is 1 in the heat storage time period from 0:00 to 6:00 which is the first time period, and 6: which is the second time period. 00-8: 0
The chasing time zone of 0 is set such that the heat source device operation priority is 6. As a whole, the priority is lower in the heat storage time zone because the priority is higher, and the number is higher in the chasing time zone because the priority is lower.

These priorities may be set in advance by the manufacturer according to the power company, user preferences, the reason for introducing heat storage, or the power company or the user may use a keyboard,
The setting can be made via an external input device such as a touch panel or a dip switch. The concept of the air-conditioning time zone according to the related art or the first to eighth embodiments is not adopted in the ninth embodiment.

In other words, in the conventional or the first to eighth embodiments, the time period in which the load pump 23 in FIG. 1 is operated to air-condition the load, the water heat exchanger of the heat source unit is operated to Although the chase time period in which the amount of heat stored in the heat storage tank is suppressed by pre-cooling or pre-heating the heat storage medium returned from the heat storage tank coincides with each other, they need not necessarily coincide in the ninth embodiment.

Further, in FIG. 8, the fifth time zone 14:
00 to 16:00 is a peak cut time zone in which the operation of the heat source device is prohibited, and the priority is set to 99 for convenience.
In FIG. 8, for example, in a facility such as a dining room, 6:00 to 0:00
It is assumed that the load is extremely concentrated at 8:00 for breakfast, 12:00 to 14:00 for lunch, and for dinner after 18:00, but there is almost no load at other times. doing.

In the above setting, the planned operation time of the heat source unit 17 shown in FIG. 1 is set for each of the first to m-th time zones. The operating time plan value is calculated on the day on which the operating time plan value of the heat source device 17 is to be calculated and set, that is, immediately before the start of the first time zone of the day.

That is, the heat source unit operation planned time value Xt _Ti [h] in the Ti time zone on the current day is obtained by correcting the heat source unit operation time actual value Xr _Ti [h] in the Ti time zone on the reference day to the correction value ΔX.
Add t _Ti [h] and ΔXL _Ti [h],

Xt _Ti = Xr _Ti + ΔXt _Ti + ΔXL _Ti [h] (57)

It is assumed that Where i = 1,2,3, ...,
ΔXt _Ti : Correction for the heat storage tank outlet water temperature difference from the reference date + Correction for the heat source functional force difference due to the outside air temperature difference from the reference date (Tith time zone) [h] ΔXL _Ti : Reference date (H), which is a correction amount (Ti-th time zone) for the air-conditioning heat load due to the difference in outside air temperature. In addition, the operation time plan value (initial value) on the first day is set to the maximum value. This value is a value obtained by subtracting the peak cut time zone and the length of the time zone in which neither heat storage nor air conditioning is performed from 24 hours, and these values vary depending on the time zone setting in the field.

[0186] (1) First, the calculation of the unused time of each time zone, the heat source equipment operation time actual value of the Ti time zone of the i-th priority _{Xr Ti [h] (i =} 1,2,3, ···· , M) are not used up for the length Xmax _Ti [h] of each time zone. That is, the time that should have been used but not used due to full storage detection or the like, that is, the unused time, is calculated.

Xmg _Ti = Xmax _Ti −Xr _Ti [h] (58)

However, in order to ignore the error of the timer counter and the minute time, when Xmg _Ti ≦ 0.1 [h],
It is assumed that Xmg _Ti = 0 [h] and Xr _Ti = Xmax _Ti [h].

(2) Refilling Unused Time The originally unused time in the high priority time zone must be smaller than the unused time in the lower priority time zone. If this is not the case for the reference date, the operation time is changed to the unused time in the time zone with the highest priority in order from the operation time in the time zone with the lowest priority. However, if Xmg _Ti ≠ 0 in the Ti-th time zone, the T-th time zone is sequentially started from the m-th-priority Tm-time zone having the lower priority.
Heat source unit operation time actual time Xr on the reference day in the i hour zone
_{Transfer Ti} [h].

That is, for the Ti-th time zone (i = 1, 2, 3,..., M ^-1 ) in order from the time zone with the highest priority, the Tk time zone in the order for the time zone with the lowest priority (K =
m, m ⁻¹ ,..., i + 1; i <k) and operate as follows. (A) Unused time Xmg in the Tith time zone having a high priority
_The calorific value [Mcal] calculated from _Ti [h] and the estimated heat source functional force QRr _Ti [Mcal / h] exerted during that time is:
Reference day operation time actual value Xr of the Tk time zone with low priority
Heat source functional force QRr _Tk estimated to be exerted on _Tk [h]
If the calorific value [Mcal] calculated from [Mcal / h] is less than or equal to,

[0191]

(Equation 22)

In the case of

[0193]

(Equation 23)

(B) The calorific value [calculated from the unused time Xmg _Ti [h] in the Ti-th time zone having a high priority and the estimated heat source functional force QRr _Ti [Mcal / h] exerted during that time. Mc
al] is calculated from the heat source functional force QRr _Tk [Mcal / h] estimated to have been exerted on the reference day operation time actual value Xr _Tk [h] of the Tk time zone having a low priority. Is also large, ie

[0195]

(Equation 24)

In the case of

[0197]

(Equation 25)

It should be noted that QRr _Tk / Qrr _Ti corrects the operation time of the heat source unit corresponding to the difference in the outside air temperature and the difference in the heat exchanger used in each time zone, that is, the difference in the heat source functional power due to the difference in the evaporation temperature. Term. Here, QR _Ti is the average value of the heat source functional force [Mcal / h] during the Ti-th time period, and is divided into the heat storage operation time and the chasing operation time by the average outside air temperature Ta _Ti [C °] during the Ti-th time period. The function is set in advance as follows. During the thermal storage _{operation: QR Ti = -e · Ta Ti} + f (i = 1,2, ···, nn) ······ (63) chase during _{operation: QR Ti = -c · Ta Ti} + d (I = nn + 1, nn + 2, ..., m) ... (64)

(3) Correction value of operation time on the day ΔXt _Ti [h]
At the end of a day's operation, the heat balance equation is

[0200]

(Equation 26)

The following is obtained. Here, from the T1 time zone to the Tnn
Until the time zone, the heat storage time zone, from the Tnn + 1 time zone to the Tm
The time zone is the chase time zone. Also, the peak cut time zone is considered to be included in the time zone having the lowest priority of the chase time zone. If the right side of Expression 65 is positive, the operation time of the heat source unit on the day is longer than the reference date, and if the right side is negative, the operation time of the heat source unit on the day is shorter than the reference day.

(A) When the operation time of the heat source unit is longer than the reference date, that is, when the right side of the equation 65 is positive, the operation time is reduced by priority from the first priority time period T1. (a) First, a correction value of the heat source unit operation time is obtained for the first priority time period T1.

[0203]

[Equation 27]

This is filled as much as possible to fill the T1 time zone as compared with Xmg _T1 .

When ΔXt _T1 ≧ Xmg _T1 (67), ΔXt _T1 = Xmg _T1 (68) Xmg _T1 = 0... (69) and proceed to the next (b). Otherwise, it means that the correction of the operation time of the heat source unit in the T1 time zone is sufficient, so that Xmg _T1 = Xmg _T1 -ΔXt _T1 (70) The calculation of the correction value of the heat source device operation time is ended.

(B) Next, a correction value of the operation time of the heat source unit for the second priority time period T2 is obtained.

[0207]

[Equation 28]

This is filled as much as possible to fill the T2 time zone as compared with Xmg _T2 .

When ΔXt _T2 ≧ Xmg _T2 (72), ΔXt _T2 = Xmg _T2 (73) Xmg _T2 = 0 ········································································································································ (74) If it is not, it means that only the correction of the operation time of the heat source unit in the T1 and T2 time zones is sufficient. Xmg _T2 = Xmg _T2 −ΔXt _T2 (75) The calculation of the correction value of the operation time of the heat source unit is ended.

(C) Similarly, a correction value of the heat source unit operation time is obtained for the Ti-th time zone (i = 3, 4, 5,..., M) after the third priority.

[0211]

(Equation 29)

This is filled as much as possible to fill the Ti-th time zone as compared with Xmg _Ti .

In the case of ΔX _Ti ≧ X mg _Ti (77), ΔX _Ti = X mg _Ti (78) X mg _Ti = 0 (78)・ ・ ・ ・ ・ ・ ・ ・ ・ (79) This term (C) is repeated by replacing i with i + 1 as
Otherwise, it means that the correction of the operation time of the heat source device in the T1 time period to the Ti time period is sufficient, so that Xmg _Ti = Xmg _Ti −ΔX _Ti ... (80) The calculation of the correction value of the operation time is terminated.

Note that the last term of the numerator in the equations 71 and 76 is for correcting the amount of heat corresponding to the increase in the operation time of the day in a time zone having a higher priority. In addition, in the cooling operation, in addition to the characteristics of the refrigeration cycle in which the cooling capacity tends to be higher as the outside air temperature is lower, the capacity of the brine heat exchanger used during the heat storage time and the water heat exchanger used during the chasing time The ability to exert greatly differs depending on the difference in evaporation temperature. For this reason, it is necessary to correct the last term of the numerator of Expressions 71 and 76 described above.

(B) When the operation time of the heat source unit becomes shorter than the reference date, that is, when the right side of the equation 65 is negative, the operation time is cut down preferentially from the Tm time zone of the mth priority. (a) First, a correction value of the heat source unit operation time is obtained for the Tm time zone having the lowest priority.

[0216]

[Equation 30]

The actual value of the operation time of the heat source unit on the reference day X
In comparison with r _Tm , the Tm-th time zone is truncated as much as possible.

In the case of Xr _Tm + ΔXt _Tm <0 (82), ΔXt _Tm = −Xr _Tm (83) Xmg _Tm = Xmax _Tm as ..... (84), proceed to the next (b), it means that the otherwise it suffices correction of the heat source machine operating time of the Tm time period, X mg _Tm = X mg _Tm - ΔXt _Tm (85) The calculation of the correction value of the heat source device operation time is ended.

(B) (b) and (c) of (A) in the above (3)
Similarly, the correction value of the operation time of the heat source unit is determined for the Ti-th time zone of the i-th priority in the descending order of priority. Note that (i = m ⁻¹ , m ⁻² ,..., 2, 1).

[0220]

(Equation 31)

The actual value of the heat source unit operating time X on the reference day
As compared with r _Ti , the time period of the Ti-th time is truncated as much as possible.

In the case of Xr _Ti + ΔXt _Ti <0 (87), ΔXt _Ti = −Xr _Ti (88) Xmg _Ti = Xmax _Ti. ..... and (89), it means that when it is not it is sufficient correction of the Tm heat source machine operating time of the time zone, second Ti time _{zone, · Xmg Ti = Xmg Ti -ΔXt} Ti (90) The calculation of the correction value of the heat source unit operation time is ended.

In addition, in the case where the prediction of the outside air temperature is corrected at a preset time, or the case where the average outside air temperature in each time zone of the night of the day is significantly different from the initial prediction, the identification is performed. At the time, the operation time plan value of the heat source unit is corrected. The correction of the outside air temperature prediction and the correction of the heat source device operation time plan are performed, for example, at 8:00 am, 10:00 and 12:00. In addition, the current time is the i-th Ti-th priority.
If the time period is one hour, the correction value of the heat source unit operating time is corrected and calculated for the i-th priority time zone and thereafter.

(4) The balance of the amount of heat at the end of the day's operation is represented by Equation 65, where ΔTa _Tj , QRt _Tj ,
Xt _Tj is the actual value calculated from the outside air temperature average of the day for j ≦ i−1, and the value at 22 o'clock in each time zone of the day re-predicted at each time for j ≧ i. Uses a predicted value calculated from a different average outdoor temperature predicted value. If the right side of Equation 65 calculated in this way is positive, the heat source unit operation time of the day is longer than the reference date, and if the right side of Equation 65 is negative, the heat source unit operation time of the day is more than the reference day. Is also shorter.

(A) When the operation time of the heat source unit is longer than the reference date, that is, when the right side of the equation 65 is positive, the operation time is reduced in priority from the Ti-th time zone of the i-th priority.
That is, the following Expression 91 is calculated in the direction of decreasing priority from the i-th time zone.

[0226]

(Equation 32)

(A) In the case of the following expression 92, the following expression 93 and the following expression 94 are obtained, and i is incremented by one, and expression 91 is calculated again. ΔXt _Ti ≧ Xmg _Ti (92) ΔXt _Ti = Xmg _Ti (93) Xmg _Ti = 0 (94)

(B) In the case of the following equation 95, the following equation 96 is used, and the heat source unit operating time correction value ΔXt _Tj = 0 in the (i + 1) th to m-th time zones is set. ΔXt _Ti <Xmg _Ti (95) Xmg _Ti = Xmg _Ti -ΔXt _Ti (96)

(B) When the operation time of the heat source unit becomes shorter than the reference date, that is, when the right side of the equation 65 is negative, the operation time is cut off preferentially from the Tm time zone of the mth priority. That is, the following Expression 97 is calculated from the m-th time zone in the direction in which the priority increases.

[0230]

[Equation 33]

(A) In the case of the following equation 98, the following equation 99 and the following equation 100 are obtained, and k is reduced by one, and equation 97 is calculated again. Xr _Tk + ΔXt _Tk <0 (98) ΔXt _Tk = −Xr _Tk (99) Xmg _Tk = Xmax _Tk ... (100)

(B) If the following equation 101, then the following equation 102
And the heat source unit operation time correction value ΔXt _Tk = 0 in the (i + 1) th time zone to the (k−1) th time zone. Xr _Tk + ΔXt _Tk ≧ 0 (101) Xmg _Tk = Xmg _Tk -ΔXt _Tk (102)

(5) Next, a method of learning the relationship between a change in the outside air temperature and a change in the air conditioning heat load for the past several days, including the current day, at the end of one day of operation will be described. Although the outline is the same as that of the above-described sixth embodiment, a description will be given focusing on a part that is partially different. (A) Calculation of the daytime average difference between the actual measured value of the outside air temperature on the day and the measured value on the reference day. Actual temperature Ta of the outside air temperature for each time zone Ti
Difference Δ between s _Ti [° C] and reference date actual value Tar _Ti [° C]
Calculate and record Tas _Ti [h]. ΔTas _Ti = Tas _Ti− Tar _Ti (103)

As a result, the time period included in the daytime can be changed to the p-th time zone.
From the time zone to the q-th time zone, the length of each time zone is set to Xmax _i [h] (i = p to q), and the daytime average difference between the actual measured value of the outside air temperature on the day and the actual measured value on the reference day is calculated. .

[0235]

(Equation 34)

(B) Calculation of the operating time load unlearned plan value excluding the influence of the error of the outside air temperature prediction. When the prediction accuracy of the outside air temperature is set to 100%, the operation time plan value that does not consider the increase or decrease of the load should be calculated, that is, the operation time load unlearned plan value is calculated. The same formula is used as the formula for calculating the heat source unit operating time plan value at 22 o'clock at the first time zone start time of the day. However, replace as follows.

The day-to-day predicted value of the average outside air temperature → the actual value of the day-to-day external air temperature average Tas _Ti [° C.] The difference Δ between the day-to-day predicted value of the average outside air temperature and the actual value of the reference day
Ta _Ti [° C] → difference between actual value of the outside air temperature average value on the day and actual value on the reference day ΔTas _Ti [° C] · Thermal storage tank outlet temperature Tstt (24) → actual value Tsts (24) at the end of operation on the day [° C] After the above replacement, the correction value of the operation time of the heat source unit should have been determined for the i-th priority time zone based on the above equation 65, that is, the operation time load unlearned. Find the correction value. (a) When the right side of Expression 65 is positive, i = 1, 2, 3,...
・ For m

[0238]

(Equation 35)

This is filled as much as possible to fill the Tith time zone as compared with Xmg _Ti . In the case of Expression 106 described later, i is increased by one as Expression 107 and Expression 108, and Expression 105 is calculated again. ΔXtt _Ti ≧ Xmg _Ti (106) ΔXtt _Ti = Xmg _Ti (107) Xmg _Ti = 0・ (108)

Further, in the case of the expression 109 described later, it means that the correction of the operation time of the heat source unit in the Ti-th time zone is sufficient. To end. ΔXtt _Ti <Xmg _Ti (109) Xmg _Ti = Xmg _Ti -ΔXtt _Ti (110)

(B) If the right side of equation 65 is negative, i = m ⁻¹ ,
For m ^-2 , ..., 1

[0242]

[Equation 36]

The actual value of the heat source unit operating time X on the reference day
The time period _Ti is reduced as much as possible in comparison with r _Ti . In the case of Expression 112 described below, Expression 111 is calculated again by decreasing i as Expressions 113 and 114. Xr _Ti + ΔXtt _Ti <0 (112) ΔXtt _Ti = −Xr _Ti (113) Xmg _Ti = Xmax _Ti (13) 114)

In the case of the expression 115 described later, it means that it is sufficient to correct only the operation time of the heat source device in the m-th time period to the Ti-th time period. The correction value calculation ends. _{Xr Ti + ΔXtt Ti ≧ 0 ········} (115) Xmg Ti = Xmg Ti -ΔXtt Ti ···· (116)

(C) Calculation of the load increment ΔQXL of the day The actual heat source unit operation time Xs _Ti [h] of the day and the above-mentioned (B)
The difference from the load unlearned plan value Xtt _Ti [h] calculated in step (1) reflects the local load condition, that is, the relationship between the outside air temperature and the load. This is corrected by the difference in capacity of the heat source unit, replaced with the load heat equivalent, and set as ΔQXL [Mcal].

[0246]

(37)

Here, QRs _Ti [Mcal / h] is the Tth of the day.
It is a heat source functional force actual value calculated using the outdoor air temperature actual value in the i-time zone.

(D) Learning the relationship between the outside air temperature and the load The difference ΔTads [° C] between the actual measured value of the daytime average temperature and the measured actual daytime temperature of the reference day calculated in the above (A) is as follows:
Increase / decrease of the outside air temperature calculated in the above (C) ΔTads [°
C], the following equation 118 is approximately assumed between the load increase and decrease ΔQXL [Mcal]. This ΔQXL [Mca
l] is divided by the heat source functional capacity in each time zone to add to the correction of the operation time plan.

The coefficient A used here is set for each of weekdays, Saturdays, and Sundays.
Set as 18:00. In addition, the coefficient A
Is the same as in the above-described sixth embodiment, and a description thereof will not be repeated.

ΔQXL = A · ΔTads (118)

In the ninth embodiment, the day is divided into a plurality of time zones in advance and set, and the operating time plan value of the heat source unit is calculated for each time zone, and the heat source is calculated based on the calculated value. Machine is driven. However, it is also possible to start the heat storage operation when the load is reduced to some extent, to end the heat storage operation when the load is increased to some extent, and to perform the chase operation using the heat storage operation or the heat storage.

In the case of a direct expansion type air conditioner in which refrigerant is circulated to the load side air conditioner indoor unit, the heat source unit has a compressor operating frequency and an operating current in the heat source unit, and the load side has the number of operating indoor units. The load can be estimated based on the fan rotation speed, the difference between the intake air temperature and the air-conditioning set temperature, and the like.

In the first to eighth embodiments described above.
In the case of water-based air conditioning that circulates water to the load-side air-conditioning indoor unit as described in, the heat source unit has a return temperature from the load, a temperature difference between the load-side feed temperature and the return temperature, and a load-side pump discharge. The load can be estimated based on the flow rate, the load-side pump operating frequency, the load-side pump operating current, and the like, and on the load side, the number of indoor units operated, the number of fans, the difference between the intake air temperature and the air-conditioning set temperature, and the like. .

As described above, in the ninth embodiment, heat storage is introduced even in a place where the time period during which the load is not concentrated is longer than the time period during which the load is concentrated, thereby reducing the capacity of the heat source device. It is possible to save money as compared with the thermal storage air conditioning equipment, and it is possible to reduce the basic contract fee for electric power. In addition, in the case where the load is concentrated at 6:00 to 8:00 which is the nighttime heat storage time zone according to the normal definition as in the ninth embodiment, if the conventional ice heat storage unit is introduced, a substantial heat storage time is obtained. The band usually lasts 10 hours from 22:00 to 8:00 and lasts 6 hours from 0:00 to 6:00.

For this reason, both the heat source unit and the ice heat storage tank require relatively large capacities, and the period required to recover the increased initial cost by the reduced running cost, that is, the so-called payback period, becomes longer. The effect of the introduction of is reduced. In addition, since the conventional ice heat storage unit can set only one time period during which heat storage operation can be performed in a day, even when there is a time period in which the load becomes extremely small during daytime, the heat storage operation during daytime is performed. By doing so, the heat source equipment capacity could not be reduced.

However, in the ninth embodiment, the fact that the load is small is detected, and heat can be stored in the time zone with an allowance of the heat source functional capacity. Therefore, the time period during which the heat source unit is steadily operated irrespective of the load becomes longer, so that the output of the heat source unit can be reduced, and the contracted electricity rate and the metered rate can be reduced.

In the ninth embodiment, a dormitory,
Air conditioning, cooling, etc. in apartments, detached houses, buildings, markets, factories, schools, recreation facilities, hospitals, refrigerated warehouses, etc., where the load is concentrated for a relatively short time and the load is small for a long time By applying to heating, heat can be stored not only at night but also during a time when the load during the day is small. Therefore, the output of the heat source device can be reduced, the contracted power amount can be reduced, and an increase in load can be dealt with without increasing the contracted power.

Embodiment 10 FIG. The heat storage device according to Embodiment 9 described above can be controlled as described below. That is, a method of controlling the heat source device in a case where the capacity of the heat source device is reduced for a load in which a sharp peak occurs a plurality of times a day will be described as an example of a heating operation in which hot water is supplied to the load. Similarly to the cooling, the average heat source functional force value QR _Ti [Mcal / h] in the Ti time zone is divided into the heat storage operation and the chase operation, and the average outside air temperature Ta _Ti [° in the Ti time zone. C] in advance. During heat storage operation: QR _Ti = e '• Ta _Ti + f' (i = 1,2, ..., nn) ... (119) During chase operation: QR _Ti = c '* Ta _Ti + d '(i = nn + 1, nn + 2, ..., m) ... (120)

Thereafter, all operations such as a method of calculating the planned operation time of the heat source unit, a method of correcting the planned operation time of the heat source unit, and a method of learning the relationship between the outside air temperature and the load are the same as those in the cooling operation. However, in each formula, c = −c ′, e = −
e 'needs to be replaced.

Embodiment 11 FIG. FIGS. 9 and 10 also show an example of another embodiment of the present invention. FIG. 9 is a circuit diagram of the heat storage device, and FIG. 10 is a diagram for explaining the setting of the operation time zone of the heat storage device. In the figure, 16 is a heat storage device comprising an ice heat storage unit, 17 is a heat source device, 18 is a brine heat exchanger built in the heat source device 17, 19 is a water heat exchanger built in the heat source device 17, and 20 is ice heat storage. It is a heat storage tank consisting of a tank.

Reference numeral 21 denotes a brine pump, 22 denotes a load side heat exchanger, 23 denotes a pump for supplying cold / hot water to the load from the ice heat storage tank 20 side, 24 denotes a three-way valve, 25 denotes a heat storage medium made of water,
Reference numeral 26 denotes a brine pipeline connected to the brine heat exchanger 18 and provided with a brine pump 21. In addition,
A part of the brine pipe 26 is connected to the heat exchanger 27 in the heat storage tank 20.
Is formed and connected to the brine pump 21 to form a brine circuit.

Reference numeral 28 denotes the water heat exchanger 19 and the load side heat exchanger 2
A first water pipe provided between the two outlets, 29 is a second water pipe provided between the water heat exchanger 19 and the second port of the three-way valve 24, and 30 is a part of the second water pipe 29. In the third water pipe provided between the heat storage tanks 20, a part or all of the water from the load side heat exchanger 22 is returned to the heat storage tank 20. 31 is a fourth water pipe provided between the outlet of the heat storage tank 20 and the first port of the three-way valve 24, and 32 is a first water temperature sensor provided in the middle of the fourth water pipe 31.

Reference numeral 33 denotes a fifth water pipe provided between the third port of the three-way valve 24 and the inlet of the load side heat exchanger 22. A pump 23 and a second water temperature sensor 34 are disposed in the middle to constitute a water circuit. doing. Reference numeral 35 denotes an outside air temperature sensor arranged in the heat storage device 16, and reference numeral 36 denotes an ice thickness sensor for detecting the ice thickness of the heat exchanger 27.

A control device 37 controls the operation of the heat storage device 16. Reference numeral 38 denotes a load-side control device which controls the opening of the three-way valve 24, that is, the load-side return water passing through the water heat exchanger 19, so that the temperature of the second water temperature sensor 34 on the load-side heat exchanger 22 becomes a predetermined value. And the mixing ratio of water at the outlet of the heat storage tank 20 is controlled. Reference numeral 39 denotes a heat source unit, which is provided with a heat source unit 40 including an absorption chiller / heater, a turbo refrigerator, an air-cooled heat pump chiller, and the like.

Reference numeral 41 denotes a sixth water pipe connected to the inlet side of the heat exchanger 42 in the heat source unit 40, and reference numeral 43 denotes a load side heat exchanger 22.
Are branched into a first water pipe 28 and a sixth water pipe 41. Reference numeral 44 denotes an inlet-side water pipe of the load-side heat exchanger 22, which is branched into a fifth water pipe 33 and a seventh water pipe 45 reaching the heat source unit 39. A pump 46 is provided in the seventh water pipe 45 and disposed outside the heat source unit 39 to carry out heat transfer.

In the heat storage device configured as described above, the cold heat generated by the heat source unit 17 is supplied to the brine pump 2.
1 and the brine in the brine line 26
It is transmitted to the heat exchanger 27 within 0. Then, in the case of cold heat storage, a part of the heat storage medium 25 made of water is frozen around the heat exchanger 27 in the heat storage tank 20, and in the case of warm heat storage, the heat storage in which the heat exchanger 27 is installed is used. Tank 2
It is stored by raising the temperature of the heat storage medium 25 consisting of water within zero.

Then, the cold or warm heat stored in the heat storage tank 20 transfers the heat storage medium 25 to the fourth water pipe 31 and the pump 23.
Is supplied to the air-conditioning load side via the load side heat exchanger 22
As a result, a cooling action or a heating action is generated. A part of the heat storage medium 25 which generates a cooling action or a heating action in the load side heat exchanger 22 and returns to the heat storage tank 20 via the water heat exchanger 19, and the other part via the three-way valve 24. 20 and again merges with the heat storage medium 25 supplied from the load side heat exchanger 22.
Supplied to

On the other hand, the other part of the heat storage medium 25 that returns by generating a cooling action or a heating action in the load side heat exchanger 22 is cooled or heated through the heat exchanger 42 in the heat source unit 40,
The heat is sent out to the load side heat exchanger 22 by the pump 46, merges with the heat storage medium 25 that has passed through the heat storage device 16, and is again supplied to the load side heat exchanger 22.

The control device 37 includes an operation time plan value calculation unit for calculating the operation time plan value of the heat source unit 17, an operation time plan value storage unit for storing the operation time plan value of the heat source unit 17, and a heat source unit. A heat source device operating time measuring means such as a timer counter for measuring the actual operating time of the device 16 per day; a heat source device operating time actual value storage unit for storing the actual operating time of the heat source device 17 for one day; An outside air temperature measurement value storage unit that stores the measurement result of the temperature sensor 35 and an outside air temperature prediction unit that calculates a predicted value of the outside air temperature are provided.

In the heat storage device as described above, the heat source device 17 and the heat source device 40 are operated in the same manner as in the first embodiment, and the return heat storage medium 25 is appropriately returned to the water heat exchanger 19 and the heat exchanger 42. The amount of heat stored in the heat storage tank 20 is controlled by cooling or heating. In addition, the first embodiment described above
In Embodiment 9, the number of the heat source units is one. However, in Embodiment 11, the number of the heat source units 17 and the number of the heat source units 40 are two. As in the ninth embodiment, a method in which a plurality of heat source devices are controlled by the control device 37 in the heat storage device 16 can be adopted.

The basic concept of this control is that if ice remains in the heat storage tank 20, the capacity of the heat source side is sufficient for the peak load, and if no ice remains in the heat storage tank 20, the peak load is reduced. On the other hand, it is based on the basic characteristics of the ice heat storage system that the capacity on the heat source side is insufficient. Then, the heat source unit is operated based on the planned operation time of a certain day, and if the heat storage amount is just zero at the end of the air conditioning, it is determined that the planned heat source device operation time of the day was appropriate, The next day's planned operation time does not increase or decrease.

If the heat storage has not been used up, it is determined that the heat storage operation of the heat source unit on that day was excessive, and the planned operation time for the next day is reduced. Conversely, too much heat storage,
When the heat source unit is operated more than the planned operation time, it is determined that the heat source unit operation time plan value for the day is too small, and the operation time plan value for the next day is increased. Hereinafter, a control method of such a heat storage device will be described by taking a cooling operation as an example.

That is, according to the ninth embodiment, a plurality of heat storage time zones and a plurality of chase time zones are set separately for one day. Furthermore, in consideration of the priority order of the heat source devices 17 and the heat source devices 40 and the priority order of the time zones, the operation priority of each heat source device in each time zone is set in advance, for example, as shown in FIG. In other words, the heat storage operation of the heat source device 17 at 0:00 to 6:00 in the first time zone has the highest priority, and then the cooling operation of the heat source device 40 in the same time zone, and the 1st operation in the sixth time zone.
Heat storage operation of the heat source device 17 from 6:00 to 18:00,
The cooling operation and the priority of the heat source device 40 in the same time zone are set.

Further, the peak cut in the fifth time period from 14:00 to 16:00 is set to the lowest priority of the operation of the heat source unit. The number of time zones is 2 m, which is increased by the number of heat source devices. The operation priorities of the plurality of heat source units are set in advance by a maker in the same manner as in the above-described ninth embodiment, or a user, an electric power company, or the like locally transmits the operation priority through an external input device such as a keyboard, a touch panel, or a dip switch. To set.

In this manner, the operation priority of each heat source unit is set for each time zone, and the operation based on the actual operation time value of each heat source unit on the reference date of each heat source unit is set as in the ninth embodiment. Operate based on time plan values. That is, the planned operation time of the heat source device 17 and the heat source device 40 is set for each of the first time zone to the second m time zone.

The planned operating time is calculated on the day when the planned operating time of the heat source unit is to be calculated and set,
That is, it is calculated immediately before the start of the first time zone of the day. That is, the planned operation time values Xt _Ti and Xt _Ti [h] of the heat source device in the Ti time zone of the day are corrected to the actual operation time value Xr _Ti [h] of the heat source device in the Ti time zone of the reference day by the correction value ΔXt. _Ti
[H] and ΔXL _Ti [h] are added to obtain Xt _Ti = Xr _Ti + ΔXt _Ti + ΔXL _Ti [h] (121) However, i = 1, 2, 3,..., 2m, and the definitions of ΔXt _Ti and ΔXL _Ti are the same as in the ninth embodiment. Note that the planned operating time on the first day (initial value) is a maximum value (a value obtained by subtracting the length of the peak cut time zone and the time zone in which neither heat storage nor air conditioning is performed from 24 hours, and these values vary depending on the local time zone setting). ).

(1) Calculation of Unused Time in Each Time Zone First, the actual heat source unit operating time value Xr _Ti [h] (i = 1, 2, 3, 2, m) in the i-th priority Ti time zone is calculated. And how much of the time zone has not been used up for the length Xmax _Ti [h]. That is, the unused time that should have been used but not used due to full storage detection or the like is calculated. Xmg _Ti = Xmax _Ti −Xr _Ti [h] (122) However, in order to ignore the error and the minute time of the timer counter, Xmg _Ti = 0 when Xmg _Ti ≦ 0.1 [h].
[H], Xr _Ti = Xmax _Ti [h].

(2) Refilling of Unused Time As in the ninth embodiment, the reference date is sequentially changed from the operation time in the time zone with the lowest priority to the unused time in the time zone with the highest priority. If Xmg _Ti during _Ti
When ≠ 0, the heat source unit operating time actual value Xr _Ti [h] on the reference day is transferred to the Ti-th time zone in order from the 2m-time T2m time zone having the lower priority. This refilling method is the same as that of the ninth embodiment, except that the capacity of the heat source unit QR _Ti [Mcal /
h] is different depending on the priority of the time zone, and the heat source device to be used changes. Heat source unit 2 during heat storage operation: QR _Ti = −e · Ta _Ti + f (123) Heat source unit 2 following operation: QR _Ti = −c · Ta _Ti + d (124) Heat source unit 42 during the cooling _{operation: QR Ti = -g · Ta Ti} + h ···· (125)

(3) Correction value of operation time on the day ΔXt _Ti [h]
At the end of a day's operation, the heat balance equation is

[0280]

(38)

Is obtained. If the right side of Expression 126 is positive, the heat source unit operation time of the day is longer than the reference date, and if the right side is negative, the heat source unit operation time of the day is shorter than the reference day. If the number of heat source units is one as in the above-described embodiment, the second term on the right side of Expression 126 is equivalent to the second term + third term on the right side of Equation 65 described above.

(A) When the operation time of the heat source unit becomes longer than the reference date, that is, when the right side of the expression 126 is positive, the first
The operation time is reduced in priority from the priority T1 time zone. (a) First, a correction value of the heat source unit operation time is obtained for the first priority T1 time zone.

[0283]

[Equation 39]

[0284] This is compared with Xmg _T1 to fill the T1 time zone as much as possible. In the case of the following equation 128, the procedure proceeds to (b) described later as equations 129 and 130. Otherwise, it means that the correction of the operation time of the heat source unit in the T1 time zone is sufficient. The calculation of the correction value of the operation time of the heat source unit is ended as the following Expression 131. ΔXt _T1 ≧ Xmg _T1 (128) ΔXt _T1 = Xmg _T1 (129) Xmg _T1 = 0 (130) Xmg _T1 = Xmg _T1 −ΔXt _T1 (131)

(B) Next, a correction value of the operation time of the heat source unit for the second priority T2 time zone is obtained.

[0286]

(Equation 40)

[0287] This is compared with Xmg _T2 , and the time period T2 is filled as much as possible. Then, in the case of Expression 133 described below, the process proceeds to (c) described below as Expressions 134 and 135. Otherwise, it is sufficient to correct only the operation time of the heat source unit in the T1 and T2 time zones. Therefore, the calculation of the correction value of the operation time of the heat source unit is ended as the following Expression 136. ΔXt _T2 ≧ Xmg _T2 (133) ΔXt _T2 = Xmg _T2 ... (134) Xmg _T2 = 0 (135) ) Xmg _T2 = Xmg _T2 −ΔXt _T2 (136)

(C) Similarly, a correction value of the operation time of the heat source unit is calculated for the Ti-th time zone (i = 3, 4, 5, 2, 2m) after the third priority.

[0289]

[Equation 41]

This is filled as much as possible to fill the Ti-th time zone as compared with Xmg _Ti . Then, the following expression 138
In the case of (1), i is replaced with i + 1 as the following Expressions 139 and 140, and this term (c) is repeated. Otherwise, it is sufficient to correct only the operation time of the heat source unit in the T1 to Ti time periods. Therefore, the calculation of the correction value of the operation time of the heat source unit is ended as the following Expression 141. ΔX _Ti ≧ Xmg _Ti (138) ΔX _Ti = Xmg _Ti (139) Xmg _Ti = 0 (13)・ ・ (140) Xmg _Ti = Xmg _Ti −ΔX _Ti・ ・ ・ ・ ・ (141)

(B) If the operation time of the heat source unit becomes shorter than the reference date, that is, if the right side of Expression 126 is negative, the m-th
The operation time is preferentially reduced from the priority Tm time zone. (a) First, a correction value of the heat source unit operation time is obtained for the m-th time zone having the lowest priority.

[0292]

(Equation 42)

[0293] This is converted to the actual heat source unit operation time value X on the reference day.
As compared with rTm, the Tm-th time zone is truncated as much as possible. In the case of the following equation 143, the procedure proceeds to (b) described later as equations 144 and 145. Otherwise, it means that only the correction of the heat source unit operation time in the Tm time zone is sufficient. The calculation of the correction value of the operation time of the heat source device is ended as Expression 146. Xr _Tm + ΔXt _Tm <0 (143) ΔXr _Tm = −Xr _Tm (144) Xmg _Tm = Xmax _Tm (145) ) Xmg _Tm = Xmg _Tm -ΔXt _Tm (146)

(B) (b) and (c) of (A) in the above (3)
Similarly, the correction value of the operation time of the heat source unit is determined for the Ti-th time zone of the i-th priority in the descending order of priority. (I = 2m-1 2m-2, ..., 2,1)

[0295]

[Equation 43]

[0296] This is calculated by comparing the actual operation time X of the heat source unit on the reference day.
r _{Ti Ti} is cut off as much as possible in the Ti time zone. In the case of the following expression 148, the expression 149 and expression 150 are used. Otherwise, the correction of the operation time of the heat source unit in the Tm time period to the Ti time period is sufficient. The calculation of the correction value of the heat source device operation time is ended as Expression 151. Xr _Ti + ΔXt _Ti <0 (148) ΔXt _Ti = −Xr _Ti (149) Xmg _Ti = Xmax _Ti (.) · (150) Xmg _Ti = Xmg _Ti- ΔXt _Ti · · · (151)

As described above, when the heat source unit is operated based on the operation time plan value for a certain day, and the heat storage amount is exactly zero at the end of air conditioning, the heat source unit operation time plan value for that day is changed to zero. Judgment was appropriate, and the planned operating time for the next day does not increase or decrease. If the heat storage has not been used up, it is determined that the heat storage operation of the heat source unit on that day was excessive, and the planned operation time for the next day is reduced.

Conversely, if the heat storage is excessively used or the heat source unit is operated more than the planned operation time, it is determined that the heat source unit operation time plan value for the day is too small, and the next day operation time plan is determined. The heat storage device is controlled to increase the value. Therefore, the planned operation time of the heat source unit can be appropriately corrected according to the situation of the outside air, and the power in the cheap heat storage time zone can be effectively used.

Embodiment 12 FIG. The heat storage device according to Embodiment 11 can be controlled as described below. In other words, as an example in which a plurality of time zones are set for one day, a method of determining excess heat storage or insufficient heat storage based on the temperature of the heat storage tank outlet water as in the first embodiment, and a plurality of methods based on the determination. The control for forcibly stopping or forcibly operating the heat source device will be described. It should be noted that the definition of the day and the definition of the time period are the same as in the above-described ninth embodiment, as shown in FIG.
The case of 0 is described as an example.

(1) Method of judging insufficient heat storage The temperature of the heat storage tank outlet is sampled at certain time intervals, and the temperature of the heat storage tank outlet at the end of the last chase time zone of the day (24:00) is predicted. The time interval is, for example, 10 minutes, and the prediction of the heat storage tank outlet temperature is performed according to the first embodiment.
3 may be based on the linear interpolation of FIG.
The modes listed in Embodiment 1 may be applied.

[0301] Further, in any time period other than the peak cut time period, the operation time plan value of any one of the plurality of heat source units is used up, and the heat storage tank outlet temperature at the end of the last chase time period of the day thereafter is set to the first setting. When the prediction result is obtained three times in succession when the temperature becomes equal to or higher than the temperature, it is determined that the heat storage amount is insufficient. The first set temperature may be changed according to the remaining time until the end time of the last chase time zone of the day, or may be set to a constant value, for example, 9 ° C. for simplification.

(2) Method of controlling heat source device when insufficient heat storage is determined When the insufficient heat storage is determined, the stopped heat source device is forcibly operated by using up the operation time plan value. At this time, when there is only one heat source device as in the ninth and tenth embodiments, an operation command may be issued to the one heat source device. When there are a plurality of heat source units as in the eleventh embodiment, an operation command is issued to each of the stopped heat source units one by one using the planned operation time according to the preset heat source unit forced operation priority. .

After the operation command is issued to the first unit, it is again determined whether or not the above-mentioned heat storage is insufficient after a lapse of a predetermined time. If it is determined that the heat storage is insufficient again, the forced operation priority is changed. Next, a forced operation command is issued to a heat source unit that has stopped using up the planned operation time. In this manner, the determination as to whether the heat storage is insufficient is repeated at regular time intervals, and the operation is performed until the prediction of the heat storage tank outlet water temperature at the end of the last chase time zone of the day is determined to be lower than the first set temperature. The heat source units that have stopped using up the time plan values are additionally operated one by one.

Here, after the elapse of a predetermined time, for example, 20
Minutes or the like, or the restart prohibition time of each heat source unit can be set as a reference. On the other hand, if the prediction result that the heat storage tank outlet temperature at the end of the last chase time zone of the day becomes equal to or lower than the second set temperature is obtained three consecutive times during the forced operation, the forced operation is terminated. Then, all the heat source units that were in the forced operation are stopped. Further, the second set temperature may be changed according to the remaining time until the air conditioning end time, but may be set to a constant value, for example, 7 [° C.] for simplification. Note that there is a relationship of second set temperature ≦ first set temperature.

Although one temperature is set for both the first set temperature and the second set temperature, it is also possible to set a plurality of these temperatures. That is, the first set temperature is set as first A, first B,..., And the second set temperature is set as second A, second B,. Then, for example, when the number of heat source devices is three, the set temperature of the first A is set to 9 ° C., the set temperature of the first B is set to 9.5 ° C., and the set temperature of the first C is set to 10 ° C. The second set temperature is set at 7 ° C., the second B set temperature is set at 7.5 ° C., and the second C set temperature is set at 8 ° C.

In a time period other than the peak cut time period, after the operating time of the heat source unit has been used up, the outlet temperature of the heat storage tank at the end of the last chasing time period on the day is equal to or higher than the first A set temperature. If the prediction result of "" is obtained three times in a row, it is determined that the heat storage amount is insufficient, and one heat source unit having the highest forced operation priority is operated.

[0307] After that, if the prediction result that the heat storage tank outlet temperature at the end of the last chase time zone on the day after the certain time has elapsed becomes equal to or higher than the first B set temperature is obtained three times in succession, again, It is determined that the heat storage amount is insufficient, and one heat source unit having the second highest forced operation priority is operated. This control is repeated for the number of heat source devices.

[0308] Conversely, when the prediction result that the heat storage tank outlet temperature at the end of the last chase time zone of the day falls below the second C set temperature during forced operation is obtained three times in a row. , The operation of the heat source device having the third compulsory operation priority is stopped. If a prediction result that the heat storage tank outlet temperature at the end of the last chase time zone of the day becomes equal to or lower than the second B set temperature is obtained three consecutive times after a lapse of a predetermined time thereafter, the forced operation priority is set. Stops the operation of the second heat source unit. This control is repeated for the number of heat source devices.

By repeating the above-described control, the heat source unit having a low forced operation priority can be operated in a state in which the predicted value of the temperature at the outlet of the heat storage tank is higher, thereby saving the electricity bill of the entire heat storage device. can do. In addition,
In the above example, the case where the number of heat source devices is three has been described.

However, for example, in the case of a heat storage device including one heat source unit, one absorption chiller, and one turbo chiller attached to the ice heat storage device, the forced operation priority is the highest. Electricity charges can be further reduced by setting the order of decreasing the amount of electricity used or the order of increasing thermal efficiency, such as an absorption refrigerator, a turbo refrigerator, and a heat source attached to an ice storage device at the end.

In addition to the above, when the output of each heat source unit is different, the forced operation priority is set so that the priority is lowered from the heat source unit with the smallest output to the heat source unit with the large output, so that the priority is reduced. It is possible to obtain an operation in which the heat source device stably follows the load fluctuation without hunting.

As described above, in the twelfth embodiment,
Insufficient heat storage is determined based on the predicted value of the heat storage tank outlet temperature at the end of the last chase time zone on the day. But,
It is more preferable to predict the heat storage tank outlet temperature at the end of the latest chasing time zone after the current time among the plurality of chasing time zones, determine the heat storage shortage based on this prediction, and forcibly operate the heat source unit. Action can be obtained.

For example, when three consecutive predictions that the heat storage tank outlet temperature at the end of the latest chasing time zone after the current time is equal to or higher than the first set temperature are obtained, it is determined that the heat storage amount is insufficient. to decide. Then, for the heat source units stopped at that time, when all the operation time plan values up to the end of the latest chasing time zone after the current time have been used up, the priority of the forced operation among the stopped heat source units is Operation is performed in descending order. In this way, even when a plurality of heat storage time zones are set, loss of air conditioning comfort due to insufficient heat storage can be prevented.

On the other hand, the judgment of excessive heat storage is also made based on the temperature of the outlet of the heat storage tank. That is, (1) Method of judging excess heat storage When the remaining time in the last chase time zone on the day becomes less than a certain level, for example, 2 hours, the outlet temperature of the heat storage tank is almost 0 [° C], for example, Tst ≦ 0. It is determined that the heat storage is excessive when the temperature is 0.5 [° C] and the operation planning time of the heat source unit has not been used up yet.

(2) Heat source device control method when excess heat storage is determined When the excess heat storage is determined, all the heat source devices are stopped ignoring the planned operation time of the heat source device. Alternatively, when it is determined that the heat storage is excessive, the heat source unit having the lowest forced operation priority is stopped first ignoring the operation time plan value. After the elapse of a predetermined time, if excess heat storage is determined again, the heat source units having the next lower priority in forced operation are stopped, or the heat source units having lower priority in forced operation are sequentially stopped.

[0316] Thereafter, it is assumed that the planned operation time of each heat source unit has been used up. For example, after one heat source unit is stopped due to the judgment of excessive heat storage, the state where the heat storage tank outlet temperature is 0 ° C. or more and 7 ° C. or less continues for a while, and when the heat storage shortage is determined, the operation is stopped. The heat source unit having the highest forced operation priority among the heat source units is operated.

As described above, when it is determined that the heat storage is excessive, the heat source unit can be forcibly stopped ignoring the planned operation time of the heat source unit. For this reason, the power load can be leveled, the power consumption can be shifted at night, and the output of the heat source device can be positively reduced. Also, in the event that the load is still large after the forced stop of the heat source unit and the temperature of the heat storage tank outlet exceeds the first set temperature at the end of the last chase time zone (24:00) on the day, and the heat storage amount is likely to be insufficient. However, it is based on using up the planned operating time of the stopped heat source unit. Therefore, it is possible to start the heat source device forced operation control for the heat storage shortage described above, and to maintain the reliability in the heat storage device control.

[0318]

As described above, the present invention relates to a heat storage device that stores cold / hot heat generated by a heat source unit in a heat storage medium accommodated in a heat storage tank and performs air conditioning operation in a predetermined time zone by storing heat of the heat storage medium. , The start and end of operation are controlled based on the operation time plan, the representative temperature of the thermal storage medium for determining the representative temperature of the thermal storage medium, the representative temperature of the thermal storage medium for predicting the representative temperature of the thermal storage medium, and the representative function of the thermal storage medium. Heat source device operation control function that controls the operation of the heat source device based on the predicted value of the temperature prediction function, heat source device stop control function that stops the operation of the heat source device based on the determination value of the heat storage medium representative temperature determination function, heat source device operation control function, and heat source An operation time actual value storage function for storing the operation time by the machine stop control function and an operation time plan for setting the next operation time plan through the storage of the operation time actual value storage function It is provided with a control device having a constant function.

As described above, the operation time plan of the heat source unit on the day is set based on the heat storage medium representative temperature, the heat storage medium representative temperature prediction, and the like based on the actual heat source unit operation time value before the day. Therefore, the required air-conditioning effect can be obtained by effectively utilizing the power in the heat storage time in the cheap heat storage time zone with a simple configuration. For this reason, the manufacturing cost of the heat storage device can be reduced, and the operation cost can be reduced.

Further, as described above, the present invention relates to a heat storage device which stores cold / hot heat generated by a heat source unit in a heat storage medium accommodated in a heat storage tank and air-conditions during a predetermined time period by storing heat of the heat storage medium. The start and end of operation are controlled based on the operation time plan, the representative temperature of the heat storage medium is determined, and the representative temperature of the heat storage medium is predicted. The heat source device is stopped according to the representative temperature determination value of the medium, the operation time of the operation and stop of the heat source device is stored, and the next operation time plan is set via the storage to operate the heat storage device.

As described above, the operation time plan of the heat source unit on the day is set based on the heat storage medium representative temperature, the heat storage medium representative temperature prediction, and the like based on the actual heat source unit operation time value before the day. Therefore, the required air-conditioning effect can be obtained by effectively utilizing the power in the heat storage time in the cheap heat storage time zone with a simple configuration. For this reason, the manufacturing cost of the heat storage device can be reduced, and the operation cost can be reduced.

Further, as described above, the present invention relates to a heat source unit operation time determination function for determining the actual operation time of a heat source unit for one day and a heat source unit operation for storing the actual operation time of the heat source unit for one day. The control device is provided with a time actual value storage function, and has an operation time plan setting function for setting the next operation time plan through the storage of the heat source unit operation time actual value storage function.

As described above, the operation time plan of the heat source unit on the day based on the actual operation time value of the heat source unit before the day is determined by the heat storage medium representative temperature, the heat storage medium representative temperature prediction, and the heat source unit operation time actual value storage. It is set via a function or the like. Therefore, the required air-conditioning effect can be obtained with a simple configuration by effectively using the power of the heat storage time in the cheap heat storage time zone. For this reason, the manufacturing cost of the heat storage device can be reduced, and the operation cost can be reduced.

Further, as described above, the present invention relates to an operation of a heat storage device that stores cold / hot heat generated by a heat source unit in a heat storage medium accommodated in a heat storage tank and air-conditions in a predetermined time zone by storing heat of the heat storage medium. The start and end of the operation are controlled based on the operation time plan, the heat storage medium representative temperature determination function for determining the representative temperature of the heat storage medium, the heat storage medium representative temperature prediction function for predicting the heat storage medium representative temperature, and the heat storage medium representative temperature prediction Heat source unit operation control function that controls the operation of the heat source unit based on the predicted value of the function, heat source unit stop control function that stops the operation of the heat source unit based on the judgment value of the heat storage medium representative temperature judgment function, heat source unit operation control function, and heat source unit stop An operation time plan value storage function for storing an operation time plan value based on the control function,
Heat source unit operation time determination function to determine the actual operation time of the heat source unit per day, heat source unit operation time actual value storage function to store the actual heat source unit operation time per day, outdoor temperature that is strongly correlated with load An external condition determination function for determining an external condition including an external condition determination value storage function for storing the determination of the external condition determination function, an external condition prediction function for calculating a predicted value of the external condition on the day, and One of the external condition input functions for inputting the predicted value of the external condition on the day, the difference between the planned value and the actual value of the operating time of the heat source unit for the past several days stored after the end of the day's operation And a learning function for learning the relationship between the judgment value of the external condition and the learning result of the learning function. A control device with a function to calculate the operating time plan calculated from It is intended.

As described above, the difference between the integrated value of the capacity of the heat source unit in the heat storage time zone, the difference of the integrated value of the capacity in the air conditioning time zone of the heat source unit, and the The difference between the reference date of the residual heat storage difference before and after daily operation and the day of the day and the difference between the reference date of the air conditioning heat load integrated value due to the outside air temperature difference during the air conditioning time zone and the day of the day, and optimally the operation time of the heat source unit Plan values are set. Therefore, the nighttime electric power can be used effectively, and the peak cut of the daytime electric power can be air-conditioned without excess or shortage of the heat storage amount, so that the required air-conditioning action is maintained and the operation cost is reduced.

Further, as described above, the present invention determines the load-side outlet temperature from the heat storage tank as the representative temperature of the heat storage medium.

As described above, the operation time plan of the heat source unit on the day based on the actual value of the operation time of the heat source unit before the day is calculated by predicting the load-side exit temperature from the heat storage tank, which is the representative temperature of the heat storage medium, and the heat storage medium representative temperature. And so on. Therefore,
With a simple configuration, it is possible to obtain a required air-conditioning effect by effectively utilizing the power of the heat storage time in the cheap heat storage time zone. For this reason, the manufacturing cost of the heat storage device can be reduced, and the operation cost can be reduced.

Further, as described above, the present invention determines the temperature of the heat storage medium at a predetermined position in the heat storage tank as the representative temperature of the heat storage medium.

As described above, the operation time plan of the heat source unit on the day based on the actual value of the operation time of the heat source unit before the day is determined based on the temperature of the heat storage medium at the predetermined position in the heat storage tank, which is the representative temperature of the heat storage medium. It is set via a representative temperature prediction or the like. Therefore, the required air-conditioning effect can be obtained by effectively utilizing the power in the heat storage time in the cheap heat storage time zone with a simple configuration. For this reason, the manufacturing cost of the heat storage device can be reduced, and the operation cost can be reduced.

As described above, according to the present invention, the operation plan of the heat source unit is set up in advance in the air conditioning time period excluding the peak cut time period based on the operation time plan value of the heat source unit, And a control device having a control function of operating / stopping the heat source unit.

As described above, the operation time plan value of the heat source unit can be reset and the operation plan of the heat source unit can be reestablished, and required air conditioning can be maintained without shortage of heat storage. For this reason, the heat storage can be used up, and the nighttime electric power of the next day can be used effectively, which has the effect of reducing the operating cost.

Further, as described above, the present invention is provided with a control device having a calculating function of calculating the planned operating time of the heat source unit separately for the heat storage time zone and the air conditioning time zone.

As described above, the planned operating time of the heat source unit can be optimally set separately for the heat storage time zone and the air conditioning time zone. Therefore, the effective use of the nighttime power and the peak cut of the daytime power can be performed without excess or deficiency of the heat storage amount, and there is an effect that the required air conditioning operation is maintained and the operation cost is reduced.

In addition, as described above, the present invention separately calculates the planned operation time of the heat source unit into the heat storage time zone and the air conditioning time zone so that the operation time in the heat storage time zone is maximized. And a control device having a setting function of setting an operation time plan value in consideration of a difference between the capacity of the heat source device in the heat storage time zone and the capacity of the heat source device in the air conditioning time zone.

As described above, the planned operation time of the heat source unit can be optimally set separately for the heat storage period and the air conditioning period, and the operation time of the heat source unit in the heat storage period is maximized. The planned operation time of the heat source unit is set. Therefore, the effective use of the nighttime power and the peak cut of the daytime power can be performed without excess or deficiency of the heat storage amount, and there is an effect that the required air conditioning operation is maintained and the operation cost is reduced.

As described above, according to the present invention, when it is determined that the load-side outlet temperature from the heat storage tank becomes equal to or higher than the predetermined set temperature at the end of air conditioning, it is determined that the heat storage amount is insufficient. And a control device having a control function of forcibly operating the heat source unit during the air conditioning time period after the planned operation time of the heat source unit has been used up.

As described above, the shortage of heat storage is determined based on the load-side outlet temperature from the heat storage tank, and the heat source unit is forcibly operated during the air conditioning time period after the operation time plan value of the heat source unit has been used up. . Therefore, even when the heat source unit is operated as required and there is an error in the planned operation time, there is an effect of maintaining the required air conditioning operation.

As described above, according to the present invention, when it is determined that the load-side outlet temperature from the heat storage tank will be equal to or higher than the first set temperature at the end of air conditioning, it is determined that the heat storage amount is insufficient. During the air-conditioning period after the planned operating time of the heat source unit is exhausted, the heat source unit is forcibly operated, and the load-side outlet temperature from the heat storage tank is equal to or lower than the second set temperature at the end of air conditioning during the forced operation. And a control device having a control function of terminating the forced operation when a prediction result indicating that the condition is satisfied is obtained.

As described above, the shortage of the heat storage amount is determined based on the load-side exit temperature from the heat storage tank, and the heat source unit is forcibly operated during the air conditioning time period after the operation time plan value of the heat source unit has been used up. . When it is determined that the heat storage amount is excessive during the forced operation of the heat source unit, the forced operation of the heat source unit ends. Therefore,
Even when the heat source unit is operated as needed and there is an error in the planned operation time, there is an effect that the required air conditioning operation is maintained and the operation cost is reduced.

Further, as described above, the present invention can be applied to the case where the prediction result that the load-side outlet temperature from the heat storage tank becomes equal to or higher than the first set temperature at the end of air conditioning is obtained plural times continuously. Judging that it is insufficient, forcibly operate the heat source unit during the air-conditioning time period after using the planned operation time of the heat source unit,
A control having a control function of terminating the forced operation when a prediction result that the load-side outlet temperature from the heat storage tank becomes equal to or lower than the second set temperature at the end of the air conditioning is continuously obtained a plurality of times while the forced operation is continued. A device is provided.

In this way, the shortage of heat storage is judged a plurality of times based on the load-side exit temperature from the heat storage tank, and the heat source unit is forcibly activated during the air conditioning time period after the operation time plan value of the heat source unit has been used up. Be driven. In addition, when it is determined that the heat storage amount is excessive plural times during the forced operation of the heat source device, the forced operation of the heat source device ends. Therefore, even when the heat source device is operated as required with high accuracy and there is an error in the operation time plan value, the required air conditioning operation is maintained and the operation cost is reduced.

As described above, according to the present invention, the predicted value of the load-side outlet temperature from the heat storage tank at the end of air conditioning, which is the representative temperature of the heat storage medium, is calculated based on the actual measured value at the present and several minutes before. The calculation is performed by linear interpolation from the points.

As described above, the predicted value of the heat storage tank outlet temperature at the time of the end of the air conditioning is calculated by linear interpolation from the two points of the actual measured value at the current time and a few minutes before, and the predicted value indicates whether the heat storage is excessive or insufficient. Is determined. By this determination, the heat source device is controlled regardless of the planned operation time. For this reason, even if there is an error in the planned operation time, there is an effect that the required air-conditioning action is favorably maintained and the operation cost is reduced.

In addition, as described above, when the remaining time until the air conditioning end time in the air conditioning time period is shorter than the remaining ice determination time, the temperature of the load-side outlet from the heat storage tank is detected as remaining ice. If the temperature is lower than or equal to, and the operation planning time of the heat source device has not been used up, a control device having a control function of determining that heat storage is excessive and stopping the heat source device regardless of the operation time planning value of the heat source device is provided. Things.

As described above, when the remaining time until the air conditioning end time becomes shorter than the remaining ice determination time, the heat storage tank outlet temperature is equal to or lower than the remaining ice detection temperature and the operation planning time of the heat source unit is exhausted. If not, it is determined that the heat storage is excessive, and the heat source device is stopped regardless of the planned operation time. For this reason,
Even when there is an error in the planned operation time, there is an effect that the required air conditioning operation is maintained and the operation cost is reduced.

As described above, according to the present invention, based on the predicted value of the outside air temperature and the load-side outlet temperature from the heat storage tank, the difference between the integrated value of the capacity of the heat source unit in the heat storage time zone and the air conditioning of the heat source unit The difference between the capacity integrated value in the time zone, the difference between the reference date of the remaining heat storage amount difference before and after one day of operation and the day of the day, and the difference between the reference date of the air conditioning heat load integrated value due to the outside air temperature difference in the air conditioning time zone and the day. And a control device having a setting function of setting the operation time plan value of the heat source unit on the day immediately before the start of the heat storage time zone.

As described above, the difference between the capacity integrated value, the difference in the residual heat storage amount, and the difference between the reference date and the current day of the air-conditioning heat load integrated value is predicted.
Immediately before the start of the heat storage time zone, the operation time plan value of the heat source device on that day is set. Therefore, the nighttime power can be used effectively, and the peak cut of the daytime power can be air-conditioned without excess or shortage of heat storage amount, and the required air-conditioning operation is maintained and the operation cost is reduced.

As described above, the present invention sets the predicted value of the outside air temperature as the average value of the heat storage time zone and the average value of the air conditioning time zone.

As described above, the average value of the heat storage time zone and the average value of the air conditioning time zone are set as the predicted values of the outside air temperature, and the difference between the integrated capacity value, the difference in the remaining heat storage amount, and the reference date of the air conditioning heat load integrated value are set. Based on the prediction of the difference between the day and the day, the planned operation time of the heat source device on the day is set immediately before the start of the heat storage time zone. Therefore, the nighttime power can be used effectively, and the peak cut of the daytime power can be air-conditioned without excess or shortage of heat storage amount, and the required air-conditioning operation is maintained and the operation cost is reduced.

As described above, according to the present invention, the predicted values of the average of the outside air temperature heat storage time zone and the average of the air conditioning time zone are calculated by comparing the average of the outside air temperature heat storage time zone and the average of the air conditioning time zone on the previous day. This is set as an actual measurement value.

As described above, the actual measured value of the average of the outside air temperature heat storage time zone and the average of the air conditioning time zone of the previous day is set as the predicted value of the average of the outside air temperature heat storage time zone and the average of the air conditioning time zone, and Based on the prediction of the difference between the accumulated value difference, the remaining heat storage amount difference, and the reference date of the air-conditioning heat load integrated value, and the current day, the operation time plan value of the heat source device on that day is set immediately before the start of the heat storage time zone. Therefore, the nighttime power can be used effectively, and the peak cut of the daytime power can be air-conditioned without excess or shortage of heat storage amount, and the required air-conditioning operation is maintained and the operation cost is reduced.

As described above, according to the present invention, at any time of day, the heat storage of the heat source unit is performed based on either the predicted value or the actual value of the outside air temperature and the load side exit temperature from the heat storage tank. Difference in capacity integrated value in the time zone, difference in capacity integrated value in the air conditioning time zone of the heat source unit, difference between reference day and day of the remaining heat storage difference before and after operation of one day, and difference in outside air temperature in the air conditioning time zone A setting function that predicts or measures the difference between the reference date of the air-conditioning heat load integrated value and the difference of the day, and sets the planned operation time of the heat source device based on the measured value of the operation time of the heat source device until the above-mentioned arbitrary time on the day. Is provided.

As described above, the difference between the integrated capacity value, the difference between the reference date of the residual heat storage amount difference and the day, and the difference between the reference date and the integrated air-conditioning heat load value and the day are predicted or measured. The operation time plan value of the heat source device is set based on the actual operation time value of the heat source device up to the above. Therefore, the nighttime electric power can be used effectively, and the peak cut of the daytime electric power can be air-conditioned without excess or shortage of the heat storage amount, so that the required air-conditioning action is maintained and the operation cost is reduced.

In the present invention, as described above, the arbitrary time is set to 8:00 am, 10:00 am and noon.

As described above, the arbitrary times are set as 8:00 am, 10:00 am and noon, and the difference of the integrated capacity value, the difference between the reference day of the remaining heat storage amount difference and that day, and the reference date of the air conditioning heat load integrated value are set. And the difference between the day and the day are predicted or measured, and the operation time plan value of the heat source unit is set based on the actually measured value of the operation time of the heat source unit up to the arbitrary time on the day. Therefore, the nighttime electric power can be used effectively, and the peak cut of the daytime electric power can be air-conditioned without excess or shortage of the heat storage amount, so that the required air-conditioning action is maintained and the operation cost is reduced.

In addition, as described above, the present invention forcibly stops the heat source unit when the ice thickness sensor detects that the heat storage is full, reduces and corrects the planned operation time of the heat source unit, and reduces the heat source unit. A control device having a control function of continuously stopping the heat source device for a predetermined time until the operation is restarted is provided.

As described above, when the heat storage unit is detected, the heat source unit is forcibly stopped, the planned operation time of the heat source unit is reduced and corrected, and the stop of the heat source unit is continued for a predetermined time until the operation of the heat source unit is restarted. Is done. For this reason, it is possible to prevent the heat source device from becoming inoperable by detecting the heat storage charge again immediately after the detection of the heat storage charge. Therefore, there is an effect that nighttime electric power can be effectively used by using up the heat storage while maintaining the required air-conditioning function, thereby reducing the operating cost.

As described above, according to the present invention, the difference between the current day of the average value of the air-conditioning time zone of the outside air temperature, which is an external condition having a strong correlation with the load, and the reference date, and the load on the reference day are used as a reference. The relationship between the operation time of the heat source unit corresponding to the increase and decrease of the load on the day is learned every day from immediately after the end of the air-conditioning period until the operation time plan value of the heat source unit on the next day is calculated. A control device having a calculation function for calculating an operation time plan value based on a predicted value of the average value of the air conditioning time zone of the outside air temperature of the day when the operation time plan value is calculated immediately before the start of the daily heat storage time zone. is there.

As described above, the difference between the current day and the reference date of the average value of the air-conditioning time zone of the outside air temperature strongly correlated with the load, and the heat source unit corresponding to the increase / decrease of the load on the current day with reference to the load on the reference day. Learns the relationship with the operating time according to past operating conditions of the heat source equipment, and predicts the average value of the outside air temperature air conditioning time zone for the day when calculating the operating time plan immediately before the start of the daily heat storage time zone Enter a value. This makes it possible to calculate an operation time plan value that predicts the load situation of the day in comparison with the reference day, makes it possible to effectively use nighttime electric power, and air-condition the peak cut of daytime electric power without excessive or insufficient heat storage. This has the effect of maintaining the required air conditioning and reducing operating costs.

As described above, according to the present invention, a heat storage time zone in which the heat source device is operated a plurality of times a day and heat is stored in the heat storage tank, and the heat source device is operated a plurality of times a day is set. A chase time period for suppressing the amount of heat storage in the heat storage tank using the return heat storage medium from the load of the heat source device and a peak cut time period for prohibiting the operation of the heat source device are provided. The heat source unit is controlled according to the load condition, and the heat storage operation by the heat source unit is started when the load becomes smaller than a predetermined value, and the heat storage operation is terminated when the load becomes larger than the predetermined value. And a chase operation in which the amount of heat stored in the heat storage tank is suppressed by utilizing the heat storage medium returned from the load of the heat source device.

As a result, the heat source unit is appropriately controlled according to the load conditions corresponding to the heat storage time zone, the chasing time zone, and the peak cut time zone. Also, the heat source device is appropriately controlled in accordance with the fluctuation of the load in each time zone. Therefore, the required air-conditioning effect can be obtained by effectively using the electric power, and there is an effect of reducing the operating cost.

As described above, according to the present invention, the heat source unit is operated based on the planned operation time of the day, and the heat storage amount of the heat storage tank corresponding to the heat source unit at the end of the air conditioning operation of the day is zero. At the end of the day, the planned operating time for the day is continued on the next day.If there is excess heat storage at the end of the air conditioning operation for the day, the planned operating time for the next day is reduced, and the air conditioning operation for the day ends. If the amount of stored heat is insufficient at the time, the operation for increasing the operation time plan value for the next day is performed.

Accordingly, the planned operating time of the heat source unit on the next day of the day is adjusted according to the amount of heat stored in the heat storage tank at the end of the air conditioning operation of the day with respect to the planned operating time of the day. Is done. Therefore, the required air-conditioning effect can be obtained by effectively using the electric power, and there is an effect of reducing the operating cost.

Further, as described above, the present invention verifies the outlet temperature of the heat storage tank corresponding to the heat source unit operated based on the planned operation time at predetermined time intervals, and terminates the air conditioning operation for one day. The outlet temperature at the time point is predicted, and when the predicted result that the outlet temperature at the time of the end of the air-conditioning operation becomes equal to or higher than the first set temperature is continuously three times, the stopped heat source unit is forcibly operated. When the predicted result that the outlet temperature at the time of the end of the air-conditioning operation becomes equal to or lower than the second set temperature is repeated three times, an operation for terminating the forced operation of the heat source device is performed.

Thus, when the result of the prediction that the outlet temperature at the end of the air-conditioning operation is equal to or higher than the first set temperature has been repeated three times, the stopped heat source unit is forcibly operated because the heat storage tank has insufficient heat storage. In addition, when the predicted result that the outlet temperature at the time of the end of the air-conditioning operation becomes equal to or lower than the second set temperature for three consecutive times during the forced operation of the heat source unit is determined, the forced operation of the heat source unit is terminated, assuming that the heat storage amount has a margin. Therefore, the required air-conditioning effect can be obtained by effectively using the electric power, and there is an effect of reducing the operating cost.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a heat storage device according to Embodiment 1 of the present invention.

FIG. 2 is a graph showing a state of a forced operation of a heat source device when heat storage of the heat storage device of FIG. 1 is insufficient.

FIG. 3 is a graph illustrating determination of insufficient heat storage of the heat storage device of FIG. 1;

FIG. 4 is a view showing the second embodiment of the present invention, and is a flowchart for calculating an operation time plan of the heat source unit in the heat storage device.

FIG. 5 is a diagram showing the sixth embodiment of the present invention, and is a process diagram for explaining a procedure for using the operation results of the reference day in the heat storage device for the operation plan of the day.

FIG. 6 is a main part logic circuit diagram in which the relationship between the outside air temperature difference and the load increase / decrease is made to correspond to the neural network.

FIG. 7 is a circuit diagram of a heat storage device according to an eighth embodiment of the present invention.

FIG. 8 is a diagram showing the ninth embodiment of the present invention, and is a diagram for explaining the setting of the operation time zone of the heat storage device.

FIG. 9 is a circuit diagram of a heat storage device according to Embodiment 11 of the present invention.

FIG. 10 is a diagram illustrating a twelfth embodiment of the present invention, and is a diagram illustrating setting of an operation time zone of the heat storage device.

FIG. 11 is a circuit diagram of a conventional heat storage device.

[Explanation of symbols]

17 heat source unit, 20 heat storage tank, 25 heat storage medium, 32
Ice thickness sensor, 37 control unit.

Claims (24)

[Claims] 1. A heat storage device that stores cold and hot heat generated by a heat source device in a heat storage medium accommodated in a heat storage tank and performs an air conditioning operation in a predetermined time zone by the heat storage of the heat storage medium. And a heat storage medium representative temperature determination function for determining the representative temperature of the heat storage medium, a heat storage medium representative temperature prediction function for predicting the heat storage medium representative temperature, and a predicted value of the heat storage medium representative temperature prediction function. A heat source device operation control function for controlling the operation of the heat source device, a heat source device stop control function for stopping the operation of the heat source device according to the judgment value of the heat storage medium representative temperature judgment function, a heat source device operation control function, and a heat source device stop control function Operation time actual value storage function for storing the operation time according to the above and operation time plan setting for setting the next operation time plan through the storage of this operation time actual value storage function A heat storage device comprising a control device having a function. 2. A heat storage device that stores cold / hot heat generated by a heat source device in a heat storage medium accommodated in a heat storage tank and performs air conditioning operation in a predetermined time zone by heat storage of the heat storage medium. The representative temperature of the heat storage medium is determined, the representative temperature of the heat storage medium is predicted, the heat source device is operated based on the predicted value of the representative temperature of the heat storage medium, and the representative temperature of the heat storage medium is determined. A method for operating a heat storage device, comprising: stopping the heat source device according to a value; storing an operation time of the operation and stop of the heat source device; and setting a next operation time plan through the storage. 3. A heat source unit operating time determining function for determining an actual operating time of a heat source unit in a day in a control unit, and a heat source unit operating time actual value storing an actual operating time of the heat source unit in the day. 2. The heat storage device according to claim 1, further comprising a storage function, wherein the operation time plan setting function sets a next operation time plan via the storage of the heat source unit operation time actual value storage function. 4. In a heat storage device that stores cold / hot heat generated by a heat source device in a heat storage medium accommodated in a heat storage tank and performs air conditioning operation in a predetermined time zone by heat storage of the heat storage medium, operation start and operation end are scheduled for operation time planning. And a heat storage medium representative temperature determination function for determining the representative temperature of the heat storage medium, a heat storage medium representative temperature prediction function for predicting the heat storage medium representative temperature, and a predicted value of the heat storage medium representative temperature prediction function. A heat source device operation control function for controlling the operation of the heat source device, a heat source device stop control function for stopping the operation of the heat source device according to the judgment value of the heat storage medium representative temperature judgment function, a heat source device operation control function, and a heat source device stop control function An operation time plan value storage function for storing an operation time plan value based on the heat source device operation time determination function for determining an actual operation time of the heat source device for one day, Actual heat source device operation time actual value storage function for storing the actual operation time of the heat source device, an external condition determination function for determining an external condition including an outside air temperature having a strong correlation with the load, and a determination of the external condition determination function Either an external condition determination value storage function of storing the external condition determination function of calculating the predicted value of the external condition on the day, or an external condition input function of inputting the predicted value of the external condition on the day. On the other hand, a learning function for learning the relationship between the difference between the planned value and the actual value of the operation time of the heat source unit for the past several days stored after the end of the one-day operation and the determination value of the external condition; A control device having an operation time plan value calculation function of calculating the operation time plan value of the heat source unit on the day based on the learning result of the learning function from either the actual value of the external condition or the predicted value of the day. Heat storage device characterized by comprising: 5. The method according to claim 1, wherein the temperature of the load side outlet from the heat storage tank is determined as a representative temperature of the heat storage medium.
The heat storage device according to claim 3. 6. The heat storage device according to claim 1, wherein a temperature of the heat storage medium at a predetermined position in the heat storage tank is determined as a representative temperature of the heat storage medium. apparatus. 7. An operation plan of the heat source device is set in the control device in the air conditioning time period excluding the peak cut time period based on the planned operation time value of the heat source device, and the heat source device is set in accordance with the operation plan. The heat storage device according to any one of claims 1 to 3, further comprising a control function of operating / stopping the heat storage device. 8. The control device according to claim 1, further comprising a calculation function for calculating a planned operation time of the heat source unit separately for a heat storage time zone and an air conditioning time zone.
The heat storage device according to claim 7. 9. A control function for calculating a planned operating time of a heat source unit separately for a heat storage time zone and an air conditioning time period, and the heat storage time zone to maximize the operation time of the heat storage time zone. And a setting function for setting the operation time plan value in consideration of a difference between the capacity of the heat source unit and the capacity of the heat source unit in the air conditioning time zone. A heat storage device according to claim 8. 10. When the control device obtains a prediction result that the load-side outlet temperature from the heat storage tank becomes equal to or higher than a predetermined set temperature at the end of air conditioning, it determines that the heat storage amount is insufficient and operates the heat source device. The control function of forcibly operating the heat source unit during an air conditioning time period after the time plan value is used up is provided, The control function according to any one of claims 1 to 3, wherein Heat storage device. 11. When the control device obtains a prediction result that the load-side outlet temperature from the heat storage tank becomes equal to or higher than the first set temperature at the end of air conditioning, it determines that the heat storage amount is insufficient and operates the heat source device. When the heat source unit is forcibly operated during the air conditioning time period after the time plan value is used up, and the load side outlet temperature from the heat storage tank becomes equal to or lower than the second set temperature at the end of the air conditioning while the forced operation is continued. The heat storage device according to claim 10, further comprising a control function of terminating the forcible operation when the prediction result is obtained. 12. The control device determines that the heat storage amount is insufficient when the prediction result that the load-side outlet temperature from the heat storage tank becomes equal to or higher than the first set temperature at the end of air conditioning is obtained a plurality of times in succession. The forced operation of the heat source unit during the air-conditioning time period after the use of the planned operating time of the heat source unit is completed, and the load-side outlet temperature from the heat storage tank becomes the second at the end of the air conditioning during the forced operation. 10. A control function for terminating the forced operation when a predicted result that the temperature is equal to or lower than a set temperature is obtained a plurality of times in succession, is provided. The heat storage device according to any one of the above. 13. A method for calculating a predicted value of a load-side outlet temperature from a heat storage tank at the end of air conditioning, which is a representative temperature of a heat storage medium, by linear interpolation from two points of a current value and a measured value at a time several minutes before. Claims 1 and 3
The heat storage device according to claim 9. 14. The controller, when the remaining time until the air conditioning end time in the air conditioning time zone becomes shorter than the remaining ice determination time, the load-side outlet temperature from the heat storage tank is equal to or lower than the remaining ice detection temperature, And a control function for stopping the heat source unit regardless of the planned operation time of the heat source unit when it is determined that the heat source unit has not been used up and the planned operation time of the heat source unit is not used up. 1, Claims 3 to 13
A heat storage device according to any one of the above. 15. A control device, comprising: a difference between a capacity integrated value of a heat storage time zone of a heat source unit based on a predicted value of an outside air temperature and a load side outlet temperature from a heat storage tank; The difference between the integrated value, the difference between the reference date of the residual heat storage amount difference before and after the operation before and after the day and the day of the day, and the difference between the reference date and the day of the air conditioning heat load integrated value due to the outside air temperature difference during the air conditioning time zone and the day of the day 15. The apparatus according to claim 1, further comprising a setting function for predicting and setting an operation time plan value of the heat source unit on the day immediately before the start of the heat storage time zone. A heat storage device according to claim 1. 16. The heat storage device according to claim 15, wherein the predicted value of the outside air temperature is an average value of a heat storage time zone and an average value of an air conditioning time zone. 17. A method according to claim 1, wherein the predicted value of the average of the outside air temperature heat storage time zone and the average of the air conditioning time zone is an actually measured value of the average of the outside air temperature heat storage time zone and the average of the air conditioning time zone on the previous day. The heat storage device according to claim 15, wherein: 18. The controller integrates, at an arbitrary time of day, the heat storage time capacity of the heat source unit based on one of the predicted value and the actual value of the outside air temperature and the load-side exit temperature from the heat storage tank. Value difference, the difference of the integrated value of the capacity of the heat source unit in the air conditioning time zone, the difference between the reference day and the day of the difference in the residual heat storage amount before and after one day of operation, and the air conditioning heat due to the outside air temperature difference in the air conditioning time zone. A setting for predicting or measuring the difference between the reference day and the day of the load integrated value on the day, and setting the operation time plan value of the heat source unit based on the actual measurement value of the heat source unit up to the arbitrary time on the day. Claim 1, characterized by being equipped with a function.
The heat storage device according to any one of claims 3 to 17. 19. The heat storage device according to claim 18, wherein the arbitrary times are 8:00 am, 10:00 am, and noon. 20. The control device according to claim 1, wherein when the heat storage unit is detected by the ice thickness sensor, the heat source unit is forcibly stopped, the operation time plan value of the heat source unit is reduced and corrected, and until the operation of the heat source unit is restarted. 20. The heat storage device according to claim 1, further comprising a control function of continuing to stop the heat source device for a predetermined time. 21. A control device, comprising: a difference between the day of the average value of the air-conditioning time zone of the outside air temperature, which is an external condition having a strong correlation with the load, and a reference date; The relationship between the operation time of the heat source unit corresponding to the increase and decrease of the load,
Immediately after the end of the air-conditioning time period and until the calculation of the operation time plan value of the heat source unit on the next day is learned daily, and at the time of calculating the operation time plan value immediately before the start of the daily heat storage time period, the outside air temperature of the day is calculated. The heat storage device according to any one of claims 1 to 3, further comprising a calculation function for calculating an operation time plan value based on a predicted value of an average value of an air conditioning time zone. . 22. A heat storage time period in which the heat source device is operated a plurality of times a day to store heat in the heat storage tank, and the heat source device is operated a plurality of times a day to load the heat source device. A chase time period for suppressing the amount of heat storage in the heat storage tank using the return heat storage medium from the above and a peak cut time period for inhibiting the operation of the heat source device are provided, and the load of the load in each of the time periods is provided. The heat source device is controlled according to the situation, and the heat storage operation by the heat source device is started when the load becomes smaller than a predetermined value, and the heat storage operation is performed when the load becomes larger than a predetermined value. And an operation method of a heat storage device that performs a heat storage utilization operation and performs a chasing operation for suppressing the amount of heat storage in the heat storage tank using the heat storage medium returned from the load of the heat source device. 23. When the heat source unit is operated based on the planned operation time of the day and the amount of heat stored in the heat storage tank corresponding to the heat source unit at the end of the air conditioning operation of the day is zero, the next day of the day. At the end of the air conditioning operation of the day, if there is a surplus in the heat storage amount at the end of the air conditioning operation of the day, the operation time planning value for the next day is reduced, and the end of the air conditioning operation of the day The method of operating a heat storage device, wherein when the heat storage amount is insufficient, the operation time plan value for the next day is increased. 24. Verify the outlet temperature of the heat storage tank corresponding to the heat source unit operated based on the planned operating time at predetermined time intervals to predict the outlet temperature at the end of the air conditioning operation in one day. When the result of the prediction that the outlet temperature at the time of the end of the air conditioning operation is equal to or higher than the first set temperature is repeated three times, the stopped heat source unit is forcibly operated, and the air conditioning operation is terminated during the forced operation of the heat source unit. A method for operating a heat storage device, wherein the forced operation of the heat source device is terminated when the predicted result that the outlet temperature at the time point becomes equal to or lower than the second set temperature is repeated three times.