CN100552573C - Controller based on the air conditioner fresh air optimized distribution of VAV - Google Patents
Controller based on the air conditioner fresh air optimized distribution of VAV Download PDFInfo
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- CN100552573C CN100552573C CNB2008100365433A CN200810036543A CN100552573C CN 100552573 C CN100552573 C CN 100552573C CN B2008100365433 A CNB2008100365433 A CN B2008100365433A CN 200810036543 A CN200810036543 A CN 200810036543A CN 100552573 C CN100552573 C CN 100552573C
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Abstract
Based on the controller of the air conditioner fresh air optimized distribution of VAV, belong to architectural environment equipment and control technology field.Among the present invention, load module is gathered required data and is delivered to memory module, memory module is stored needed data, the new wind demand ratio in resh air requirement calculating and the total new wind demand of control module computing system and each zone, finding wherein maximum new wind demand ratio, is the new wind ratio setting value of system's air-supply with this value.New air-valve control module is a setting value with the total new wind demand of system, by PID control the result is passed to the air-valve actuator.Cold again control module is calculated the terminal air-supply setting enthalpy in each district, passes to the discharge adjustment module of enthalpy difference control, and this module is pressed PID control with valve position information transmission water valve actuator according to set enthalpy and sampled value through the air-supply behind the terminal coil pipe.The present invention had not both increased new wind load and had avoided cold-hot counteraction yet, had taken into account indoor air quality simultaneously.
Description
Technical field
What the present invention relates to is a kind of controller, specifically is a kind of controller based on the air conditioner fresh air optimized distribution of VAV (air conditioning system with variable), belongs to architectural environment equipment and control technology field.
Background technology
In commercial building, general air-conditioning system all is to utilize treated new wind to dilute the pollutant levels of room air, but is that multipotency is a cost to consume more as a rule.Therefore, guaranteeing to reduce resh air requirement under the prerequisite of indoor pollution substrate concentration in certain limit as far as possible.In the air-conditioning system of multizone, all being not quite similar of each air conditioning area towards, illumination, personnel etc., thus cause the requirement of each regional air conditioner load and resh air requirement to have nothing in common with each other.For the VAV air-conditioning system, it be according to a certain new wind ratio to each zone air-supply, change the aperture of regulating the VAV air-valve according to each regional actual load, the excessive and situations of other new wind deficiencies in zone simultaneously of the new wind in some zone so just will inevitably appear.Prior art and document have been done some researchs to this problem, a kind of VAV air-conditioning system of deciding resh air requirement that as Chinese patent application number has been 200620126089.7 patent disclosure, comprise recirculating air processing unit and fresh air processor group and vav terminal, be characterised in that after treatment new wind and recirculating air do not mix earlier, but by airduct (single tube hyperchannel, each interchannel is airtight) be sent to each vav terminal place respectively and mix again, in fact the new wind of total system is excessive, and new blower fan group and recirculating air unit to move noise simultaneously big; Also have heat strategy again, it is in the demanding air conditioning area of new wind ratio, and controlling opening of valve increases air output and uses terminal reheater heat more simultaneously, voltage and hot again time by the adjusting reheater change heating load, prevent that the zone is cold excessively, have cold-hot counteraction, control is complicated and uneconomical.
Summary of the invention
Be deficiency and the defective that overcomes prior art, the invention provides a kind of controller, improved the problem of new wind deficiency in the present VAV air-conditioning system, on the basis that does not increase new wind load based on the air conditioner fresh air optimized distribution of VAV, take into account indoor air quality, improve indoor hygienic conditions.
The present invention is achieved through the following technical solutions.The present invention includes load module, memory module, resh air requirement calculates and control module, new air-valve control module, cold again control module, the discharge adjustment module and the output module of enthalpy difference control.
Load module is gathered required data, the temperature of etching system air-supply when comprising sampling instant and this, humidity, total resh air requirement, the setting value of each regional indoor temperature, humidity and air flow rate and temperature, the humidity of blowing later on through terminal coil pipe, and all data that will gather are sent into memory module.
The occupancy that memory module will be stored in advance is sent to resh air requirement calculating and control module with funtcional relationship and the total resh air requirement of each regional air output and system of time, with system with through later wind pushing temperature, the humidity of terminal coil pipe, the setting value of each regional indoor temperature, humidity is delivered to cold control module again simultaneously.
Resh air requirement calculates and control module is calculated each regional number according to the funtcional relationship of determining, determine the new wind demand ratio in each regional minimum fresh air demand, total new wind demand and each zone according to the ventilation standard of ASHRAE Standard 62-1999, determine wherein maximum new wind demand ratio, with the setting value of this value as system's new wind ratio.The sampled value of total new wind demand and total resh air requirement is delivered to new air-valve control module, the new wind demand ratio in each zone and the setting value of new wind demand ratio are delivered to cold control module again.
New air-valve control module is a setting value with total new wind demand, by with the aperture of relatively coming the Adjustment System air-valve of total resh air requirement sampled value, control passes to output module with valve position information according to PID.
Cold again control module is according to the setting value of indoor temperature, humidity, the new wind demand in each zone than and maximum new wind demand than and temperature, the humidity of system's air-supply calculate the terminal air-supply in each district enthalpy setting value, it is passed to the discharge adjustment module of enthalpy difference control, and control passes to output module with valve position information to the discharge adjustment module of enthalpy difference control according to PID.
Output module is exported to actuator with steering order again, with control system air-valve and terminal coil pipe water valve.
Compared with prior art, beneficial effect of the present invention: the present invention is a setting value according to the real-time total new wind demand of system, the aperture of the new air valve of control system, and each is distinguished air output and is determined by the local area air conditioner load.If in the new excessive zone of wind, it is the lower zone of new wind ratio requirement, use terminal coil pipe to each region aids heating or refrigeration, just can reduce these regional air outputs, thereby saved new wind is transferred to the zone of other new wind deficiencies, so both do not increase new wind load and avoided cold-hot counteraction yet, taken into account indoor air quality simultaneously.
The present invention is optimized distribution to the resh air requirement of system, can make each zone under the prerequisite that all satisfies indoor air quality, reduces system's resh air requirement as far as possible, and avoids heat to offset, and reaches purpose of energy saving.
Description of drawings
Fig. 1 is a logic diagram of the present invention.
Among the figure: the 1-load module, the 2-memory module, the 3-resh air requirement calculates and control module, the new air-valve control module of 4-, the cold again control module of 5-, the discharge adjustment module of 6-enthalpy difference control, 7-output module.
Embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As shown in Figure 1, the present invention includes load module 1, memory module 2, resh air requirement calculates and control module 3, new air-valve control module 4, cold again control module 5, the discharge adjustment module 6 and the output module 7 of enthalpy difference control.
The output of load module 1 is connected to the input end of memory module 2, the output terminal of memory module 2 is connected respectively to the input end of resh air requirement calculating and control module 3, the input end of cold again control module 5, resh air requirement calculates and is connected with the input end of the input end of air-valve control module 4 and cold again control module 5 respectively with the output terminal of control module 3, the output terminal of cold again control module 5 is connected with the input end of the discharge adjustment module 6 of enthalpy difference control, the output terminal of the discharge adjustment module 6 of enthalpy difference control is connected to output module 7, and the output terminal of new air-valve control module 4 also is connected to output module 7.
Load module 1 is gathered required data: the temperature of etching system air-supply when sampling instant and this, humidity, total resh air requirement, the setting value of each regional indoor temperature, humidity and the air output that each is regional and temperature, the humidity of blowing later on through terminal coil pipe are sent all data into memory module 2.The occupancy that memory module 2 will be stored in advance and the funtcional relationship P of time (t)=a
0+ a
1(t-t
0)+a
2(t-t
0) (t-t
1)+... + a
n(t-t
0) (t-t
1) ... (t-t
n) and the total resh air requirement of each regional air output and system, delivering to resh air requirement together calculates and control module 3, with system with through later wind pushing temperature, the humidity of terminal coil pipe, the setting value of each regional indoor temperature, humidity is delivered to cold control module 5 again simultaneously.
Buildings is observed, be recorded in particular moment t
iIndoor effective strength P
i, that is:
P(t
i)＝P
i (i＝0，1，…，n) (1)
Wherein
T---the time
t
1---i specific observation is constantly
P (t)---t is the occupancy calculated value constantly
P
i---t
1Constantly indoor effective strength
With above various simultaneous, can solve coefficient a
0, a
1... a
nAlso write earlier in the memory module, call for resh air requirement calculating and control module 3.Coefficient a in this module
0, a
1..., a
nAllow to revise and set.
The funtcional relationship calculating sampling that resh air requirement calculates and control module 3 bases have been determined is each regional number constantly, determine the minimum fresh air demand that each is regional according to the new ventilation standard of ASHRAE Standard 62-1999 then, the new wind demand ratio in the total new wind demand of computing system, each zone, determine the wherein maximal value of new wind ratio demand, with the setting value of this value as system's new wind ratio.The sampled value of the total new wind demand of system and total resh air requirement is delivered to new air-valve control module 4, the new wind demand ratio and the new wind ratio setting value in each zone are delivered to cold control module 5 again.
Minimum fresh air demand definite as follows
V
f，min＝V
p×P+V
B×A (2)
V wherein
PBe everyone required resh air requirement, P is an occupancy, V
BBe every square metre of resh air requirement that floor area of building is required, A is the area in required air conditioner zone.
Cold again control module 5 is according to system with through later wind pushing temperature, the humidity of terminal coil pipe, each distinguishes the enthalpy (seeing formula 7) of later air-supply enthalpy of terminal coil pipe and indoor setting the setting value computing system of each regional indoor temperature, humidity and process, adopt coil pipe auxiliary heating or refrigeration in new wind demand than the zone that is lower than the new wind ratio setting value, calculate the air enthalpy (seeing formula 6) of vav terminal, be setting value and distinguish the air-supply enthalpy that terminal coil pipe calculates later on through each and deliver to discharge control module 6 together with this enthalpy.
The new wind demand in each zone
M
oa[i]＝Z[i]×M
sa[i] (3)
The actual air output in each zone should be controlled at
Suppose that room load does not change, promptly
Q[i]＝M
sa[i]×(H
sa-H
set[i])＝G
sa[i]×(H
sup[i]-H
set[i]) (5)
Got by (2), (3) and (4) simultaneous solution, the terminal air-supply in each district enthalpy setting value is
The air-supply enthalpy H of system
SaWith setting enthalpy H in each compartment
Set[i] calculated by following formula:
H＝1.01t+d(2500+1.84t) (7)
In the formula:
T---dry-bulb temperature
D---water capacity
Z[i]---the new wind demand ratio in i zone of current time
Z
Max---the new wind demand ratio of maximum in the All Ranges
M
SaThe air output that i zone of [i]---current time needs
G
OaI actual air output in zone of [i]---current time
Q[i]---i zone load of current time
H
Sa---the enthalpy of current time AHU air-supply
H
SetThe enthalpy of [i]---current time i regional indoor setting
H
SupI zone of [i]---current time is through the enthalpy behind the terminal coil pipe
New air-valve control module 4 and enthalpy difference controlled water flow amount adjustment module 6 are given output module 7 with the control information of air-valve and water valve, and output module 7 is exported to actuator with steering order again, with new air-valve of control system and coil pipe water valve.The discharge of terminal coil pipe is controlled by the PID enthalpy difference and is realized.
The present invention is a setting value according to the real-time total new wind demand of system, the aperture of the new air valve of control system, and each is distinguished air output and is determined by the local area air conditioner load.If in the new excessive zone of wind, it is the lower zone of new wind ratio requirement, use terminal coil pipe to each region aids heating or refrigeration, just can reduce these regional air outputs, thereby saved new wind is transferred to the zone of other new wind deficiencies, so both do not increase new wind load and avoided cold-hot counteraction yet, taken into account indoor air quality simultaneously.
Claims (1)
1. controller based on the air conditioner fresh air optimized distribution of VAV, comprise: load module (1), memory module (2), resh air requirement calculates and control module (3), new air-valve control module (4), cold again control module (5), the discharge adjustment module (6) and the output module (7) of enthalpy difference control is characterized in that:
Load module (1) is gathered required data, the temperature of etching system air-supply when comprising sampling instant and this, humidity, total resh air requirement, the setting value of each regional indoor temperature, humidity and air flow rate and temperature, the humidity of blowing later on through terminal coil pipe, and all data that will gather are sent into memory module (2);
The occupancy that memory module (2) will be stored in advance is sent to resh air requirement calculating and control module with funtcional relationship and the total resh air requirement of each regional air output and system of time, with system with through later wind pushing temperature, the humidity of terminal coil pipe, the setting value of each regional indoor temperature, humidity is delivered to cold control module (5) again simultaneously;
Resh air requirement calculates and control module (3) is calculated each regional number according to the funtcional relationship of determining, determine the new wind demand ratio in each regional minimum fresh air demand, total new wind demand and each zone according to the ventilation standard of ASHRAE Standard 62-1999, determine wherein maximum new wind demand ratio, with the setting value of this value as system's new wind ratio, the sampled value of total new wind demand and total resh air requirement is delivered to new air-valve control module (4), the new wind demand ratio in each zone and the setting value of new wind demand ratio are delivered to cold control module (5) again;
New air-valve control module (4) is a setting value with total new wind demand, by with the aperture of relatively coming the Adjustment System air-valve of total resh air requirement sampled value, control passes to output module (7) with valve position information according to PID;
Cold again control module (5) is according to the setting value of indoor temperature, humidity, the new wind demand in each zone than and maximum new wind demand than and temperature, the humidity of system's air-supply calculate the terminal air-supply in each district enthalpy setting value, it is passed to the discharge adjustment module (6) of enthalpy difference control, and the discharge adjustment module (6) of enthalpy difference control is controlled according to PID and is given output module (7) with the control information of water valve;
Output module (7) is exported to actuator with steering order again, with control system air-valve and terminal coil pipe water valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100365433A CN100552573C (en) | 2008-04-24 | 2008-04-24 | Controller based on the air conditioner fresh air optimized distribution of VAV |
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|---|---|---|---|
| CNB2008100365433A CN100552573C (en) | 2008-04-24 | 2008-04-24 | Controller based on the air conditioner fresh air optimized distribution of VAV |
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| CN100552573C true CN100552573C (en) | 2009-10-21 |
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| CN102393058B (en) * | 2011-10-24 | 2013-05-08 | 杨光 | End control system for air conditioning systems |
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Assignee: Wuhan Kebei Technology Co.,Ltd. Assignor: Shanghai Jiao Tong University Contract record no.: 2011420000215 Denomination of invention: Controller based on VAV air conditioner fresh air optimized dispensing Granted publication date: 20091021 License type: Exclusive License Open date: 20080917 Record date: 20110809 |
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Granted publication date: 20091021 Termination date: 20140424 |