JP2007263519A - Cooling system using absorption type chiller-heater using exhaust heat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To construct an economical cooling system by plurally providing absorption type chiller-heaters and using power generation waste heat as their heat sources, and to improve economical efficiency by rationally reducing running costs. <P>SOLUTION: Two absorption type chiller-heaters, and two engine-driven power generators are provided, and engine cooling water produced by the engine-driven power generators is supplied to regenerators of the absorption type chiller-heaters as waste heat and used as an operation heat source. Based on difference between inlet/outlet temperatures of the cooling water to an evaporator measured by an inlet temperature sensor 36 and an outlet temperature sensor 37, namely, a required load of a cooler, an exhaust heat recovery amount is distributed by a distribution amount control means 43 such that an exhaust heat amount (exhaust heat hot water) exceeding a set amount enough for avoiding stoppage being an ON-OFF control range of combustion equipment can be supplied to the regenerator, and the control range of the combustion equipment is extended from a range of ON-OFF control to improve heating efficiency. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to exhaust heat utilization configured to perform cooling by utilizing exhaust heat from an exhaust heat generating power generation means such as an engine driven generator that drives a generator by an engine as a heat source of an absorption chiller / heater. The present invention relates to a cooling system using an absorption-type cooling / heating machine.

As an absorption chiller / heater using exhaust heat, the following are known.
An evaporator, an absorber, a high temperature regenerator, a low temperature regenerator, a condenser, a high temperature solution heat exchanger, a low temperature solution heat exchanger, a refrigerant pump, and a solution pump are connected through various lines. The absorber and the condenser are provided with a cooling water line for circulating the cooling water cooled by the cooling tower. The evaporator is provided with a cold / hot water line for supplying cold water (hot water) to a cooling (heating) load.

The high-temperature regenerator is provided with a heating source such as a gas burner and a fuel line for supplying fuel to the heating source.
In the rare solution line from the absorber to the high temperature regenerator, a branch point is provided between the low temperature solution heat exchanger and the high temperature solution heat exchanger, and the branch line connecting the branch point to the low temperature regenerator is provided. From the branch point side, a pressure reducing valve as a pressure adjusting means and an intermediate regenerator are interposed. An exhaust heat line is connected to the intermediate regenerator, and the dilute solution flowing in the branch line is heated with exhaust heat. (See Patent Document 1).
JP-A-11-237136

In the above-described conventional example, a plurality of absorption chiller / heaters are provided so that it is easy to appropriately respond to the cooling demand, including the cost, and a plurality of exhaust heat from the exhaust heat generation type power generation means such as an engine-driven generator is provided. In this case, the exhaust heat is distributed and supplied to the plurality of intermediate regenerators.
In addition, when there is not much power generation demand, in order to reduce the initial cost, an inexpensive power generator having a small rating corresponding to the power generation demand is used.
In such a case, the entire amount of recovered exhaust heat cannot cover the entire amount of cooling demand, and the shortage is configured to be compensated by adjusting the heating output of the heating device.

  However, for example, when the required cooling load is not so high as in the interim period, and the amount of exhaust heat necessary to satisfy the required load is close to the amount of exhaust heat supplied and distributed, the required load for cooling is fluctuated. On the other hand, it is also necessary to stop the heating device, the heating device is frequently turned on and off, the heating efficiency by the heating device is reduced, fuel is consumed more than necessary, and the running cost increases, which is inconvenient. There was a disadvantage of becoming an economy. In addition, there is also a drawback that the heating device is likely to break down due to an increase in ON-OFF frequency and durability is lowered.

  The present invention has been made in view of such circumstances, and the invention according to claim 1 is provided with a plurality of absorption chiller / heaters, and economically uses power generation exhaust heat as a heat source. While the system can be constructed, the object is to further reduce the running cost and improve the economy, and the invention according to claim 2 aims to further improve the economy. And

In order to achieve the above-described object, the cooling system using the absorption chiller / heater using exhaust heat according to the invention of claim 1
A regenerator that regenerates the refrigerant by heating the absorbent containing the refrigerant;
A condenser for supplying a refrigerant regenerated and evaporated in the regenerator to condense and liquefy;
An absorber for supplying an absorbent after evaporation of the refrigerant from the regenerator;
An evaporator connected to the absorber and supplying the refrigerant condensed and liquefied by the condenser and evaporating the refrigerant by absorbing the refrigerant by the absorber;
A cold water outlet pipe attached to the evaporator for extracting cold water cooled by latent heat of vaporization in the evaporator;
An absorbing liquid return pipe connected to the absorber and the regenerator to return the absorbing liquid that has absorbed the refrigerant to the regenerator;
A supply pipe for supplying the absorbent after evaporation of the refrigerant from the regenerator to the absorber;
A combustion apparatus attached to the regenerator for heating the absorbing liquid containing the refrigerant;
An absorption chiller / heater is provided with exhaust heat recovery means that recovers exhaust heat from the exhaust heat generation type power generation means, supplies it to the regenerator, and heats the absorption liquid containing the refrigerant in the regenerator. And
A plurality of the absorption chiller / heater units and a cooling device connected to the chilled water discharge pipe; and
Combustion control means for controlling the output of the combustion device in accordance with the required load of the cooling device;
Waste heat recovery amount control means for controlling the amount of exhaust heat supplied to the regenerator according to the required load of the cooling device;
Exhaust heat amount distribution means for distributing the amount of exhaust heat that can be supplied from the exhaust heat generation type power generation means to the plurality of regenerators;
In accordance with the required load of the cooling device, required exhaust heat amount calculating means for calculating the exhaust heat amount required for the required load;
The distribution amount of the exhaust heat amount distribution means so that the exhaust heat amount deviated by a set amount sufficient to avoid stopping the combustion device from the required exhaust heat amount calculated by the required exhaust heat amount calculation means can be supplied to the regenerator. And a distribution amount control means for controlling.
The regenerator is not limited to a single regenerator, and includes a low regenerator, a high temperature regenerator, and an intermediate regenerator.

(Action / Effect)
According to the configuration of the cooling system using the absorption heat chiller / heater using exhaust heat according to the first aspect of the present invention, the exhaust heat from the exhaust heat generating power generation means recovered by the exhaust heat recovery means is absorbed in a plurality of ways. When the amount of exhaust heat recovery is greater than the required cooling load, the exhaust heat recovery amount is controlled according to the required cooling load. When the amount of exhaust heat recovery is zero or less than the required cooling load, the combustion device is operated, and the output of the combustion device is controlled according to the required cooling load. When distributing the amount of exhaust heat that can be supplied to the regenerator, control is performed so as to avoid stopping of the combustion device in the output control of the combustion device.
Accordingly, a plurality of absorption chiller / heaters can be provided, and a cooling system can be constructed economically by using the generated exhaust heat as the heat source.
In addition, since there are multiple absorption chiller / heater units and the amount of exhaust heat recovered that can be supplied to each regenerator is distributed so as to avoid the stoppage of the combustion device in the output control of the combustion device, fluctuations in the required cooling load On the other hand, it is not necessary to perform ON-OFF control of the combustion device, it is possible to avoid a decrease in heating efficiency due to frequent stoppage of the combustion device, reduce fuel consumption, and failure due to frequent stoppage of the combustion device Since the durability can be improved by avoiding the problem, the maintenance cost can be reduced, and the running cost can be rationally reduced to improve the economy.

In order to achieve the above-described object, the invention according to claim 2
In the cooling system using the absorption-type cooling / heating machine using exhaust heat according to claim 1,
A plurality of exhaust heat generating power generation means are provided.

(Action / Effect)
According to the configuration of the cooling system using the absorption chiller / heater using exhaust heat according to the second aspect of the present invention, a plurality of exhaust heat generating generators such as an engine-driven generator are not provided, Since it comprises a stand, a general-purpose product can be used, the initial cost can be reduced, and the economy can be further improved.

As is apparent from the above description, according to the configuration of the cooling system using the exhaust heat utilizing absorption chiller / heater of the invention according to claim 1, the exhaust heat generating power generation means recovered by the exhaust heat recovery means When the exhaust heat is distributed and supplied to the regenerators of multiple absorption chiller / heaters, and the amount of exhaust heat recovery is greater than the required load for cooling, the amount of exhaust heat recovered is determined according to the required load for cooling. Control. When the amount of exhaust heat recovery is zero or less than the required cooling load, the combustion device is operated, and the output of the combustion device is controlled according to the required cooling load. When distributing the amount of exhaust heat that can be supplied to the regenerator, control is performed so as to avoid stopping of the combustion device in the output control of the combustion device.
Accordingly, a plurality of absorption chiller / heaters can be provided, and a cooling system can be constructed economically by using the generated exhaust heat as the heat source.
In addition, since there are multiple absorption chiller / heater units and the amount of exhaust heat recovered that can be supplied to each regenerator is distributed so as to avoid the stoppage of the combustion device in the output control of the combustion device, fluctuations in the required cooling load On the other hand, it is not necessary to perform ON-OFF control of the combustion device, it is possible to avoid a decrease in heating efficiency due to frequent stoppage of the combustion device, reduce fuel consumption, and failure due to frequent stoppage of the combustion device Since the durability can be improved by avoiding the problem, the maintenance cost can be reduced, and the running cost can be rationally reduced to improve the economy.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall schematic configuration diagram showing an embodiment of a cooling system using an absorption chiller / heater using exhaust heat according to the present invention, and shows two absorption chiller / heaters 1, 1 and two Engine-driven generators 2 and 2 are provided, and the engine cooling water generated in the engine-driven generator 2 is used as exhaust heat for the operating heat source of the absorption chiller / heater 1. A fuel cell may be used in place of the engine-driven generator 2, and the exhaust heat from the fuel cell may be used. The engine-driven generator 2, the fuel cell, etc. Collectively referred to as power generation means. In the following description, a case where cooling is performed by taking out cold water will be described.

  Each of the absorption chiller heaters 1 and 1 has a regenerator 3 that regenerates the refrigerant by heating the absorbing liquid containing the refrigerant, and a condenser that condenses and liquefies by supplying the refrigerant regenerated and evaporated by the regenerator 3. 4, an absorber 5 that supplies the absorption liquid after evaporation of the refrigerant from the regenerator 3, a refrigerant that is connected to the absorber 5 and condensed and liquefied by the condenser 4, and the refrigerant is absorbed by the absorber 5 to absorb the refrigerant. An evaporator 6 that evaporates is provided.

  The regenerator 3 and the absorber 5 are connected via an absorption liquid return pipe 8 and a supply pipe 9 with a refrigerant pump 7 interposed therebetween, and return the absorption liquid that has absorbed the refrigerant to the regenerator 3 and after the refrigerant has evaporated. The absorption liquid is supplied from the regenerator 3 to the absorber 5. A first heat exchanger 10 is provided across the absorption liquid return pipe 8 and the supply pipe 9, and is configured to heat the absorption liquid that has absorbed the refrigerant by the absorption liquid after the refrigerant has evaporated.

A chilled water take-out pipe 12 having a first circulation pump 11 interposed therein is connected to the evaporator 6, and a cooling device 13 is connected to the chilled water take-out pipe 12 to take out chilled water cooled by latent heat of vaporization in the evaporator 6. In addition, the cooling water can be used for cooling.
The cooling device 13 is provided with a flow rate adjusting valve 16 at an inlet portion of the cold water supply pipe 14 to the air conditioning heat exchanger 15, and the cold water supplied to the air conditioning heat exchanger 15 according to the required cooling load. Configured to adjust the amount.

 The engine-driven generator 2 is configured by interlockingly connecting a generator 19 to a gas engine 17 via a clutch 18. The gas engine 17 is connected to a cooling water circulation pipe 21 having a second circulation pump 20 interposed therebetween. The cooling water circulation pipe 21 is provided with a second heat exchanger 22 for flowing cooling water from the cooling tower, and in parallel with the second heat exchanger 22, a first three-way valve capable of adjusting the distribution flow rate. A first bypass pipe 24 is connected through 23.

  Further, on the upstream side of the first three-way valve 23, the cooling water circulation pipe 21 is provided with a third heat exchanger 25 that constitutes an exhaust heat recovery means. A cooling water temperature sensor 26 for measuring the temperature of the cooling water is attached between the connection portion of the cooling water circulation pipe 21 with the first bypass pipe 24 and the gas engine 17, and the cooling water temperature sensor 26 The first three-way valve 23 is linked to adjust the opening of the first three-way valve 23 so that the temperature of the cooling water supplied to the gas engine 17 is maintained at a set temperature.

A hot water circulation pipe 28 having a third circulation pump 27 interposed therein is connected to the third heat exchanger 25, and the hot water circulation pipe 28 is introduced into the regenerator 3 to exhaust heat from the gas engine 17 (power generation exhaust heat). ) Is recovered and used as a heat source for the regenerator 3.
In the exhaust heat recovery means, a second bypass pipe 30 is connected to the hot water circulation pipe 28 in parallel with the regenerator 3 via a second three-way valve 29 capable of adjusting the distribution flow rate. It is configured such that the amount of exhaust heat recovery can be controlled by adjusting the opening degree of the second three-way valve 29 according to the required cooling load in the apparatus 13.

Both hot water circulation pipes 28, 28 are connected via a hot water supply pipe 32 and a hot water return pipe 33 provided with a third three-way valve 31, 31 capable of adjusting the distribution flow rate, and are connected to both regenerators 3, 3. Exhaust heat quantity distribution means is configured to distribute the supplied exhaust heat quantity. The third three-way valves 31, 31 are operated in conjunction with each other.
Each of the regenerators 3 and 3 is provided with a combustion device 34 capable of controlling the heating output by adjusting the fuel supply amount so that the regenerator 3 is heated when the amount of exhaust heat supplied to the regenerator 3 is insufficient. It is configured. In the figure, reference numeral 35 denotes a cooling water supply pipe for supplying cooling water from the cooling tower to the condenser 4 and the absorber 5.

In the cold water extraction pipe 12, an inlet temperature sensor 36 is provided on the side supplied to the evaporator 6, and an outlet temperature sensor 37 is provided on the side extracted from the evaporator 6.
An inlet temperature sensor 36 and an outlet temperature sensor 37 are connected to the controller 38, and the second three-way valve 29, the third three-way valve 31, and the combustion device 34 are connected to the controller 38.

  As shown in the block diagram of the control system of FIG. 2, the controller 38 includes first and second required load calculating means 39 and 40, first and second required heat quantity calculating means 41 and 42, and distribution amount control. Means 43, exhaust heat amount-distribution amount data table 44, first and second exhaust heat recovery amount control means 45, 46, and first and second combustion control means 47, 48 are provided.

The first required load calculating means 39 calculates the temperature difference between the inlet temperature and the outlet temperature input from the inlet temperature sensor 36 and the outlet temperature sensor 37 of one absorption chiller / heater 1, and calculates the calculated temperature difference. Based on this, the difference from the set temperature difference, that is, the 13 required loads of the cooling device is calculated.
Further, the second required load calculating means 40 calculates the temperature difference between the inlet temperature and the outlet temperature input from the inlet temperature sensor 36 and the outlet temperature sensor 37 of the other absorption chiller / heater 1, and calculates the calculated temperature. Based on the difference, the difference from the set temperature difference, that is, the 13 required loads of the cooling device is calculated.

Based on the required load of the cooling device 13 calculated by the first required load calculating means 39, the first required exhaust heat amount calculating means 41 calculates the amount of exhaust heat required for the calculated required load. Yes.
Further, the second required exhaust heat amount calculating means 42 calculates the exhaust heat amount necessary for the calculated required load based on the 13 required loads of the cooling device calculated by the second required load calculating means 40. It has become.

  In the distribution amount control means 43, based on the first and second required exhaust heat amounts calculated by the first and second required exhaust heat amount calculation means 41, 42, the larger required exhaust heat amount is used as a reference and is small. In consideration of the required amount of exhaust heat, a corresponding distribution amount is extracted from the exhaust heat amount-distribution amount data table 44, an opening required to obtain the corresponding distribution amount is obtained, and a drive signal for obtaining the opening is obtained. Are output from the third three-way valves 31 and 31, and the third three-way valves 31 and 31 are controlled so as to obtain the obtained distribution amount.

In the exhaust heat amount-distribution amount data table 44, for example, values as shown in the following table in which the exhaust heat amount and the distribution amount are correlated are stored in advance.
Here, each of the maximum required loads of the cooling devices 13 is set to 100%, and the both engine-driven generators 2 are required loads when the maximum required loads of the cooling device 13 from the gas engine 17 are set to 100%. The maximum amount of exhaust heat converted to 40% is selected. As the distribution amount, a value deviating by 10% from the upper and lower limits of the required load range of the cooling device 13 as a set amount is set to be out of the ON-OFF control range of the combustion device 34.

In the first exhaust heat recovery amount control means 45, the required load of the cooling device 13 calculated by the first required load calculation means 39, that is, the inlet temperature input from the inlet temperature sensor 36 and the outlet temperature sensor 37, Based on the difference between the temperature difference from the outlet temperature and the upper limit set temperature difference or the lower limit set temperature difference, if the temperature difference is larger than the upper limit set temperature difference, it will be opened.If the temperature difference is smaller than the lower limit set temperature difference, The amount of exhaust heat (the amount of exhaust heat and hot water) to be recovered is adjusted by adjusting the opening degree of the second three-way valve 29 by PID control so that the temperature difference is maintained within the set range, such as on the close side. It has become.
Further, in the second exhaust heat recovery amount control means 46, the required load of the cooling device 13 calculated by the second required load calculation means 40, that is, the inlets inputted from the inlet temperature sensor 36 and the outlet temperature sensor 37. Based on the difference between the temperature difference between the temperature and the outlet temperature and the upper limit temperature difference or the lower limit temperature difference, if the temperature difference is larger than the upper limit temperature difference, the temperature difference is larger than the lower limit temperature difference. Control the amount of exhaust heat (exhaust heat water amount) to be recovered by adjusting the opening of the second three-way valve 29 by PID control so that the temperature difference is maintained within the set range such that the temperature difference is kept within the set range. It is supposed to be.

In the first combustion control means 47, after the opening degree of the second three-way valve 29 is fully opened, the 13 required loads of the cooling device calculated by the first required load calculation means 39, that is, the inlet Based on the difference between the temperature difference between the inlet temperature and the outlet temperature inputted from the temperature sensor 36 and the outlet temperature sensor 37 and the upper limit set temperature difference or the lower limit set temperature difference, the combustion apparatus if the temperature difference is larger than the upper limit set temperature difference On the other hand, the output of the combustor 34 is set to PID so as to eliminate the difference, such as increasing the fuel supply amount to 34, or reducing the fuel supply amount if the temperature difference is smaller than the lower limit temperature difference. It is controlled by control.
Further, in the second combustion control means 48, after the opening degree of the second three-way valve 29 is fully opened, the 13 required loads of the cooling device calculated by the second required load calculating means 40, that is, Based on the difference between the temperature difference between the inlet temperature and the outlet temperature input from the inlet temperature sensor 36 and the outlet temperature sensor 37 and the upper limit temperature difference or the lower limit temperature difference, the temperature difference is larger than the upper limit temperature difference. The output of the combustion device 34 is adjusted so that the difference is eliminated, such as increasing the amount of fuel supplied to the combustion device 34, or reducing the fuel supply amount if the temperature difference is smaller than the lower limit temperature difference. Are controlled by PID control.

Next, the control operation by the above-described control configuration will be described using the flowchart of FIG.
First, in the initial stage of operation, the system waits until the operation of the absorption chiller / heater 1 is stabilized, for example, the outlet temperature measured by the outlet temperature sensor 37 reaches a predetermined temperature (for example, 7 ° C.) (S1).
After the operation is stabilized, the first and second required load calculation means 39 and 40 calculate the required loads (first and second required loads) of the cooling devices 13 of the both absorption chiller / heaters 1 ( S2), the first and second required exhaust heat amounts corresponding thereto are calculated by the first and second required load calculating means 39, 40 (S3).

  After that, based on the above-mentioned and second required exhaust heat amount, the larger required exhaust heat amount is taken as a reference and the smaller required exhaust heat amount is taken into consideration, and the corresponding distribution amount from the exhaust heat amount-distribution amount data table 44. And the third three-way valves 31 and 31 are set so as to obtain a distribution amount corresponding thereto.

Thereafter, it is determined whether the temperature difference between the inlet temperature and the outlet temperature input from the inlet temperature sensor 36 and the outlet temperature sensor 37 is larger than the upper limit set temperature difference (S5), and the temperature difference is greater than the upper limit set temperature difference. If larger, it is determined whether or not the second three-way valve 29 is fully opened (S6).
If it is not fully open, the process proceeds to step S7, and the second three-way valve 29 is opened by a predetermined opening by PID control. On the other hand, if it is fully open, the process proceeds to step S8, and the amount of fuel supplied to the combustion device 34 is increased by PID control.

When it is determined in step S5 that the temperature difference is not larger than the upper limit set temperature difference, the process proceeds to step S9, and the temperature difference between the inlet temperature and the outlet temperature input from the inlet temperature sensor 36 and the outlet temperature sensor 37 is the lower limit. It is determined whether the temperature difference is smaller than the set temperature difference. If the temperature difference is smaller than the lower limit temperature difference, it is determined whether the second three-way valve 29 is fully opened (S10).
If not fully open, the process proceeds to step S11, and the second three-way valve 29 is closed by a predetermined opening by PID control. On the other hand, if it is fully open, the process proceeds to step S12, and the fuel supply amount to the combustion device 34 is decreased by a set amount by PID control.
When it is determined in step S9 that the temperature difference is not smaller than the lower limit set temperature difference, that is, when there is no change in the required cooling load, the process returns to step S5.
After steps S7, S8, S11, and S12, it is determined whether or not the operation is stopped. If the operation is continued, the process returns to step S5, and steps S5 to S13 are repeated until the operation is stopped.

With the above configuration, based on the required load of the cooling device 13 after the start of operation, the exhaust heat amount (exhaust heat hot water) deviating from the set amount sufficient to avoid the stop that becomes the ON-OFF control range of the combustion device 34 is regenerated. The exhaust heat recovery amount is distributed so as to be able to be supplied to the engine 3, and PID control can be performed regardless of whether the exhaust heat hot water supply amount or the fuel supply amount to the combustion device 34 is supplied.
That is, as shown in the graph of the correlation between the required load in FIG. 4A, the supply amount of exhaust hot water and the amount of fuel supplied to the combustion device, for example, the cooling device 34 for both absorption chiller heaters 1 When the required load is about 50%, if the supply amount of the waste heat hot water to the regenerator 3 is evenly distributed to 40%, the control range of the combustion device 34 is ON− with respect to fluctuations in the required load. It enters the range of OFF control. Therefore, the supply amount of the exhaust heat hot water is set to 60% (65% in the above embodiment) that is out of the range of the ON-OFF control by the PID control. Can be adjusted. As shown in FIG. 4B, the supply amount of the other waste heat / hot water to the regenerator 3 is 20% (15% in the above embodiment), so that the range of ON-OFF control is 40% or less. Since the required load of the cooling device 34 is about 50%, the fuel supply amount to the combustion device 34 can be adjusted by PID control.
From these results, it is possible to improve the heating efficiency by removing the control range of both combustion devices 34 from the range of ON-OFF control.

  In the above embodiment, the required load of the cooling device 13 is calculated based on the temperature difference between the inlet temperature and the outlet temperature measured by the inlet temperature sensor 36 and the outlet temperature sensor 37. It may be configured to calculate based on the circulation amount of the absorption liquid flowing through the absorption liquid return pipe 8 or the supply pipe 9 or the temperature in the regenerator 3.

  Moreover, in the said Example, although the thing provided with the two engine drive type generators 2 was shown, as this invention, the thing provided with the engine drive type generator 2 1 unit | set or 3 or more units | sets may be sufficient. Moreover, as the absorption-type cold / hot water machine 1, three or more units may be provided.

It is the whole schematic block diagram which shows the Example of the air_conditioning | cooling system using the absorption-type cooling / heating machine using waste heat based on this invention. It is a block diagram which shows a control system. It is a flowchart with which it uses for description of control operation. It is a graph which shows the correlation with a required load, the supply amount of waste heat warm water, and the fuel supply amount to a combustion apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Absorption type cold / hot water machine 2 ... Engine drive type generator (waste heat generation type generator)
DESCRIPTION OF SYMBOLS 3 ... Regenerator 4 ... Condenser 5 ... Absorber 6 ... Evaporator 8 ... Absorbed liquid return pipe 9 ... Supply pipe 12 ... Cold water extraction pipe 25 ... 3rd heat exchanger (exhaust heat recovery means)
27 ... Third circulation pump (waste heat recovery means)
28 ... Hot water circulation piping (exhaust heat recovery means)
29 ... Second three-way valve (waste heat recovery means)
30 ... Second bypass pipe (exhaust heat recovery means)
31 ... Third three-way valve (waste heat distribution means)
32 ... Hot water supply pipe (waste heat distribution means)
33 ... Warm water return pipe (waste heat distribution means)
34 ... Combustion device 41 ... First required exhaust heat amount calculating means 42 ... Second required exhaust heat amount calculating means 43 ... Distribution amount control means 45 ... First exhaust heat recovery amount control means 46 ... Second exhaust heat recovery amount Control means 47 ... first combustion control means 48 ... second combustion control means

Claims (2)

A regenerator that regenerates the refrigerant by heating the absorbent containing the refrigerant;
A condenser for supplying a refrigerant regenerated and evaporated in the regenerator to condense and liquefy;
An absorber for supplying an absorbent after evaporation of the refrigerant from the regenerator;
An evaporator connected to the absorber and supplying the refrigerant condensed and liquefied by the condenser and evaporating the refrigerant by absorbing the refrigerant by the absorber;
A cold water outlet pipe attached to the evaporator for extracting cold water cooled by latent heat of vaporization in the evaporator;
An absorbing liquid return pipe connected to the absorber and the regenerator to return the absorbing liquid that has absorbed the refrigerant to the regenerator;
A supply pipe for supplying the absorbent after evaporation of the refrigerant from the regenerator to the absorber;
A combustion apparatus attached to the regenerator for heating the absorbing liquid containing the refrigerant;
An absorption chiller / heater is provided with exhaust heat recovery means that recovers exhaust heat from the exhaust heat generation type power generation means, supplies it to the regenerator, and heats the absorption liquid containing the refrigerant in the regenerator. And
A plurality of the absorption chiller / heater units and a cooling device connected to the chilled water discharge pipe; and
Combustion control means for controlling the output of the combustion device in accordance with the required load of the cooling device;
Waste heat recovery amount control means for controlling the amount of exhaust heat supplied to the regenerator according to the required load of the cooling device;
Exhaust heat amount distribution means for distributing the amount of exhaust heat that can be supplied from the exhaust heat generation type power generation means to the plurality of regenerators;
In accordance with the required load of the cooling device, required exhaust heat amount calculating means for calculating the exhaust heat amount required for the required load;
The distribution amount of the exhaust heat amount distribution means so that the exhaust heat amount deviated by a set amount sufficient to avoid stopping the combustion device from the required exhaust heat amount calculated by the required exhaust heat amount calculation means can be supplied to the regenerator. Distribution amount control means for controlling
A cooling system using an absorption chiller / heater using exhaust heat. In the cooling system using the absorption-type cooling / heating machine using exhaust heat according to claim 1,
A cooling system using an absorption chiller / heater using exhaust heat, which is provided with a plurality of waste heat generation type power generation means.

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