CN106679068A - Chilled water supply temperature setting method and system of main refrigeration machine of central air-conditioning system - Google Patents

Chilled water supply temperature setting method and system of main refrigeration machine of central air-conditioning system Download PDF

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Publication number
CN106679068A
CN106679068A CN201611077339.7A CN201611077339A CN106679068A CN 106679068 A CN106679068 A CN 106679068A CN 201611077339 A CN201611077339 A CN 201611077339A CN 106679068 A CN106679068 A CN 106679068A
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Prior art keywords
water supply
chilled water
water temperature
supply water
host computer
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CN201611077339.7A
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CN106679068B (en
Inventor
李兴飞
邱佰平
薛雪
袁宜峰
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Shenzhen Das Intellitech Co Ltd
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Shenzhen Das Intellitech Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a chilled water supply temperature setting method and system of a main refrigeration machine of a central air-conditioning system. The method comprises the following steps: S1, collecting the water temperature Tac of a chilled water pipe before the main refrigeration machine of the central air-conditioning system is started; S2, in combination with a set chilled water supply temperature value Taim of the main refrigeration machine, obtaining a difference value DeltaT between the collected water temperature and the set chilled water supply temperature value, wherein DeltaT=Tac-Taim; S3, in a preset period of time tlimit when chilled water supply temperature reaches the set chilled water supply temperature value, calculating process values Tset(k) of the chilled water supply temperature at corresponding moments k in sequence according preset time intervals Deltat and the following formula: Tset(k)=-k(DeltaT/tlimit)Deltat+Tac, k=1,2 to K, and K is the total number of the preset time intervals; and S4, controlling the operation of the main refrigeration machine through a PID controller according to the calculated process values Tset(k) of the chilled water supply temperature. Through the method and the system, the effect that the chilled water temperature of the main refrigeration machine quickly and effectively reaches the preset value is realized, and meanwhile the purpose that the main refrigeration machine saves energy and is prolonged in service life is realized.

Description

The chilled water supply water temperature establishing method of central air conditioner system refrigeration host computer and system
Technical field
The present invention relates to Air-condition system control technical field, more particularly to a kind of freezing of central air conditioner system refrigeration host computer Water supply water temperature establishing method and system.
Background technology
In China, building energy consumption total amount in 2014 accounts for social total energy consumption 30% more than 12.5 hundred million tons of standard coals.Central air-conditioning Energy consumption accounts for building total energy consumption 65%, and wherein Air Conditioning Facilities energy consumption accounts for air conditioning energy consumption 70% or so.Therefore it is directed to central air-conditioning The concern of the efficiency level that the capital equipment of system machine room, particularly refrigeration host computer are started shooting and run the period just seems particularly heavy Will.
Traditional central air conditioner system main frame generally adopts solid in the design temperature of the chilled water supply water temperature of start period Fixed setting value (such as 5 DEG C, 7 DEG C), this establishing method generally passes through PID/feedback control realization by system.Due to opening from start Begin to chilled water water supply actual temperature to reach the limited time (such as half an hour or 1 hour) of setting value, while at the beginning of start, freezing The close room temperature of water temperature in water pipe, larger with setting value gap, this causes the actual water supply water temperature of the chilled water during PID control Can there is larger fluctuation in design load close region, and then reduce the efficiency level of start period refrigeration host computer and use the longevity Life.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of efficiency level for improving refrigeration host computer and service life The chilled water supply water temperature establishing method of central air conditioner system refrigeration host computer and system.
The technical solution adopted for the present invention to solve the technical problems is：A kind of central air conditioner system refrigeration host computer is provided Chilled water supply water temperature establishing method, comprises the following steps：
S1, central air conditioner system refrigeration host computer start before, gather chilled water water pipe water temperature Tac；
S2, with reference to chilled water supply water temperature setting value T of the refrigeration host computeraim, obtain the water temperature T of collectionacAnd institute State chilled water supply water temperature setting value TaimBetween difference DELTA T；
Wherein, Δ T=Tac-Taim；
S3, reach chilled water supply water temperature setting value T in chilled water supply water temperatureaimPredetermined amount of time tlimitIt is interior, At preset timed intervals interval of delta t, by following formula the process of the chilled water supply water temperature in corresponding moment k is calculated successively Value Tset(k)：
Wherein, K is prefixed time interval section sum；
S4, PID controller are according to the process values T for calculating the chilled water supply water temperature for obtainingsetK () controls the system The operation of cold main frame.
Preferably, step S1 also includes：Chilled water supply water temperature setting value T of the refrigeration host computer is setaim。
Preferably, in step S3, the chilled water supply water temperature reaches the predetermined of the chilled water supply water temperature setting value Time period tlimitFor 30min-2h.
Preferably, in step S3, the prefixed time interval Δ t is 5-10min.
Preferably, in step S4, the refrigeration host computer operation, in the predetermined amount of time tlimitIt is interior so that the freezing Water supply water temperature is gradually changed, the process values of the chilled water supply water temperature when prefixed time interval Δ t reaches the corresponding moment Tset(k)。
Preferably, in step S4, in the predetermined amount of time tlimitAfterwards, the chilled water supply water temperature reaches the freezing Water supply water temperature setting value Taim。
The present invention also provides a kind of chilled water supply water temperature setting device of central air conditioner system refrigeration host computer, including：
The water temperature T of collection chilled water water pipeacTemperature collecting cell；
With reference to chilled water supply water temperature setting value T of the refrigeration host computer of central air conditioner systemaim, obtain the water of collection Warm TacWith chilled water supply water temperature setting value TaimBetween difference DELTA T the first computing unit；Wherein, Δ T=Tac- Taim；
Chilled water supply water temperature setting value T is reached in chilled water supply water temperatureaimPredetermined amount of time tlimitIt is interior, press Prefixed time interval Δ t, by following formula the process values of the chilled water supply water temperature in corresponding moment k are calculated successively TsetSecond computing unit of (k)：
Wherein, K is prefixed time interval section sum；With And
According to the process values T for calculating the chilled water supply water temperature for obtainingsetK () controls the refrigeration host computer operation PID controller；
The temperature collecting cell is connected with first computing unit, and first computing unit and PID controller are divided It is not connected with second computing unit.
Preferably, first computing unit and the second computing unit are integrated in a host computer.
Beneficial effects of the present invention：According to chilled water pipe water temperature and chilled water supply water temperature before measure refrigeration host computer start Difference between setting value, obtains the chilled water supply water temperature process values (i.e. PID target value) per certain time interval；Refrigeration Main frame runs under PID controller control according to the chilled water supply water temperature process values for obtaining, so as to realize the cold of refrigeration host computer Freeze coolant-temperature gage and quickly effectively reach setting value, it is to avoid energy consumption is wasted, reach energy-conservation purpose and extend refrigeration host computer service life.
Description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the flow chart of the chilled water supply water temperature establishing method of the central air conditioner system refrigeration host computer of the present invention；
Fig. 2 is the chilled water supply water temperature change curve of refrigeration host computer after startup in prior art；
Fig. 3 be according to the present invention establishing method refrigeration host computer start after chilled water supply water temperature change curve；
Fig. 4 is the connection block diagram of the chilled water supply water temperature setting device of the central air conditioner system refrigeration host computer of the present invention.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and effect, now compare accompanying drawing and describe in detail The specific embodiment of the present invention.
As shown in figure 1, the chilled water supply water temperature establishing method of the central air conditioner system refrigeration host computer of the present invention, including with Lower step：
S1, central air conditioner system refrigeration host computer start before, gather chilled water water pipe water temperature Tac.The water temperature of the collection The chilled water supply water temperature for being refrigeration host computer when not actuated.
Also include after the step S1 collection water temperature：Chilled water supply water temperature setting value T of refrigeration host computer is setaim.The freezing Water supply water temperature setting value is the chilled water supply water temperature desired value to be reached after refrigeration host computer startup.
The setting of chilled water supply water temperature setting value is realized by the operation on the guidance panel of central air conditioner system.
S2, with reference to chilled water supply water temperature setting value T of refrigeration host computeraim, obtain the water temperature T of the chilled water water pipe of collectionac With chilled water supply water temperature setting value TaimBetween difference DELTA T.
Wherein, Δ T=Tac-Taim。
S3, reach chilled water supply water temperature setting value T in chilled water supply water temperatureaimPredetermined amount of time tlimitIt is interior, by pre- If time interval Δ t, the process values T of the chilled water supply water temperature in corresponding moment k is calculated successively by following formulaset (k)：
Wherein, K is prefixed time interval section sum.
Above-mentioned steps S1-S3 are carried out when before refrigeration host computer startup.
Alternatively, chilled water supply water temperature reaches the predetermined amount of time t of chilled water supply water temperature setting valuelimitFor 30min-2h.Prefixed time interval Δ t is can 5-10min, such as 5min, 10min.
For example, in predetermined amount of time 30min, at interval of 5min the chilled water supply water temperature at the moment behind the interval is calculated Process values, then prefixed time interval section sum K be 6.The process of the chilled water supply water temperature of first time time interval 5min ValueThe process values of the chilled water supply water temperature of second time interval 5min By that analogy, the chilled water supply water temperature value at the corresponding moment in multiple time interval, the chilled water supply water temperature value are obtained Also it is the i.e. PID target value of control refrigeration host computer operation.
S4, PID controller are according to the process values T for calculating the chilled water supply water temperature for obtainingset(k) control refrigeration host computer Operation.
Under operation, by the result of calculation of step S3, its chilled water supply water temperature reaches chilled water confession to refrigeration host computer Coolant-temperature gage setting value TaimPredetermined amount of time tlimitIt is interior so that in prefixed time interval Δ t, when chilled water supply water temperature reach Process values T during the corresponding momentset(k), so as to be freezed in progressive mode so that chilled water supply water temperature is gradually changed, until Reach chilled water supply water temperature setting value Taim。
In predetermined amount of time tlimitAfterwards, chilled water supply water temperature reaches chilled water supply water temperature setting value Taim。
Realize that the chilled water temperature of refrigeration host computer quickly effectively reaches setting value by above-mentioned method, it is to avoid energy consumption wave Take, reach energy-conservation purpose and extend refrigeration host computer service life.
With reference to shown in Fig. 2,3, the chilled water supply water temperature change curve of refrigeration host computer after starting respectively in prior art Figure, according to the present invention establishing method refrigeration host computer start after chilled water supply water temperature change curve；Transverse axis is time t, The longitudinal axis is temperature T.Knowable to Fig. 2,3 contrasts, the chilled water supply water temperature change curve of prior art is the (freezing of fixed value straight line Water supply water temperature setting value TaimIt is constant)；Chilled water supply water temperature change curve in the present invention be changing value straight line, chilled water Supply water temperature is from initial actual value TacIn predetermined amount of time tlimitThe process values T of interior correspondence chilled water supply water temperaturesetK () becomes Change, to reaching chilled water supply water temperature setting value Taim, this method of operation causes inclined actual motion value in operation to fluctuate more It is little, it is more stable.
As shown in figure 4, the chilled water supply water temperature setting device of the central air conditioner system refrigeration host computer of the present invention, including temperature Degree collecting unit 10, the first computing unit 20, the second computing unit 30 and PID controller 40.Temperature collecting cell 10 and One computing unit 20 connects, and the first computing unit 20 and PID controller 40 are connected respectively with the second computing unit 30.
Wherein, temperature collecting cell 10 is used to gather the water temperature T of chilled water water pipeac。
First computing unit 20 is used for the chilled water supply water temperature setting value of the refrigeration host computer 1 with reference to central air conditioner system Taim, obtain the water temperature T of collectionacWith chilled water supply water temperature setting value TaimBetween difference DELTA T；Wherein, Δ T=Tac-Taim。
Second computing unit 30 is used to reach chilled water supply water temperature setting value T in chilled water supply water temperatureaimPre- timing Between section tlimitInterior, at preset timed intervals interval of delta t, calculates successively the chilled water in corresponding moment k and supplies water temperature by following formula The process values T of degreeset(k)：
Wherein, K is prefixed time interval section sum.
PID controller 40 is according to the process values T for calculating the chilled water supply water temperature for obtainingsetK () control refrigeration host computer 1 is transported OK.
Preferably, the first computing unit 20 and the second computing unit 30 are integrated in a host computer, PID controller 40 with The host computer connection.
The chilled water supply water temperature establishing method of the central air conditioner system refrigeration host computer of the present invention can pass through the central air-conditioning The chilled water supply water temperature setting device of cooling system main frame is realized.
To sum up, the chilled water supply water temperature establishing method and system of central air conditioner system refrigeration host computer of the invention, in reality The chilled water temperature of existing refrigeration host computer quickly effectively reaches setting value, it is to avoid energy consumption is wasted, and reaches energy-conservation purpose and extends refrigeration While main frame service life, without the need for extra addition hardware device, only need to gather chilled water before refrigeration host computer start and supply water temperature Degree, it is simple to operate easy-to-use and effective.
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills Art field, is included within the scope of the present invention.

Claims (8)

1. the chilled water supply water temperature establishing method of a kind of central air conditioner system refrigeration host computer, it is characterised in that including following step Suddenly：
S1, central air conditioner system refrigeration host computer start before, gather chilled water water pipe water temperature Tac；
S2, with reference to chilled water supply water temperature setting value T of the refrigeration host computeraim, obtain the water temperature T of collectionacIt is cold with described Freeze water supply water temperature setting value TaimBetween difference DELTA T；
Wherein, Δ T=Tac-Taim；
S3, reach chilled water supply water temperature setting value T in chilled water supply water temperatureaimPredetermined amount of time tlimitIt is interior, by pre- If time interval Δ t, the process values of the chilled water supply water temperature in corresponding moment k are calculated successively by following formula Tset(k)：
T s e t ( k ) = - k Δ T t lim i t Δ t + T a c , ( k = 1 , 2 , ... K )
Wherein, K is prefixed time interval section sum；
S4, PID controller are according to the process values T for calculating the chilled water supply water temperature for obtainingset(k) control refrigeration master The operation of machine.
2. the chilled water supply water temperature establishing method of central air conditioner system refrigeration host computer according to claim 1, its feature It is that step S1 also includes：Chilled water supply water temperature setting value T of the refrigeration host computer is setaim。
3. the chilled water supply water temperature establishing method of central air conditioner system refrigeration host computer according to claim 1, its feature It is that in step S3, the chilled water supply water temperature reaches the predetermined amount of time t of the chilled water supply water temperature setting valuelimit For 30min-2h.
4. the chilled water supply water temperature establishing method of central air conditioner system refrigeration host computer according to claim 1, its feature It is that in step S3, the prefixed time interval Δ t is 5-10min.
5. the chilled water supply water temperature establishing method of central air conditioner system refrigeration host computer according to claim 1, its feature It is, in step S4, the refrigeration host computer operation, in the predetermined amount of time tlimitIt is interior so that the chilled water supply water temperature Gradually change, the process values T of the chilled water supply water temperature when prefixed time interval Δ t reaches the corresponding momentset(k)。
6. the chilled water supply water temperature establishing method of central air conditioner system refrigeration host computer according to claim 5, its feature It is, in step S4, in the predetermined amount of time tlimitAfterwards, the chilled water supply water temperature reaches the chilled water supply water temperature Setting value Taim。
7. the chilled water supply water temperature setting device of a kind of central air conditioner system refrigeration host computer, it is characterised in that include：
The water temperature T of collection chilled water water pipeacTemperature collecting cell；
With reference to chilled water supply water temperature setting value T of the refrigeration host computer of central air conditioner systemaim, obtain the water temperature T of collectionac With chilled water supply water temperature setting value TaimBetween difference DELTA T the first computing unit；Wherein, Δ T=Tac-Taim；
Chilled water supply water temperature setting value T is reached in chilled water supply water temperatureaimPredetermined amount of time tlimitIt is interior, by default Time interval Δ t, by following formula the process values T of the chilled water supply water temperature in corresponding moment k is calculated successivelyset Second computing unit of (k)：
Wherein, K is prefixed time interval section sum；And
According to the process values T for calculating the chilled water supply water temperature for obtainingsetK () controls the PID controls of the refrigeration host computer operation Device processed；
The temperature collecting cell is connected with first computing unit, first computing unit and PID controller respectively with The second computing unit connection.
8. the chilled water supply water temperature setting device of central air conditioner system refrigeration host computer according to claim 7, its feature It is that first computing unit and the second computing unit are integrated in a host computer.
CN201611077339.7A 2016-11-28 2016-11-28 The chilled water supply water temperature setting method and system of central air conditioner system refrigeration host computer Active CN106679068B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107560118A (en) * 2017-09-12 2018-01-09 深圳达实智能股份有限公司 A kind of establishing method and device of hospital's refrigeration host computer chilled water supply water temperature
CN109654688A (en) * 2018-12-21 2019-04-19 珠海格力电器股份有限公司 Adjusting method, system and the air-conditioner set of air-conditioner set output power
CN110762732A (en) * 2019-10-30 2020-02-07 南京亚派软件技术有限公司 Chilled water supply water temperature setting method and system for refrigeration host of central air-conditioning system

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JPH11173631A (en) * 1997-12-15 1999-07-02 Shinko Kogyo Co Ltd Air conditioner controller
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CN104534628A (en) * 2015-01-26 2015-04-22 珠海格力电器股份有限公司 Control method and system for variable-frequency cooling water pump
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CN105387570A (en) * 2015-11-30 2016-03-09 珠海格力电器股份有限公司 Executive capability adjustment method and device of water chilling unit
CN105650808A (en) * 2015-12-29 2016-06-08 深圳市奥宇节能技术股份有限公司 Adjusting and controlling method and device for outlet water temperature of chilled water of water chilling unit

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JPH11173631A (en) * 1997-12-15 1999-07-02 Shinko Kogyo Co Ltd Air conditioner controller
JP2007139241A (en) * 2005-11-16 2007-06-07 Hitachi Ltd Air conditioner
CN102003768A (en) * 2010-11-02 2011-04-06 深圳达实智能股份有限公司 Energy-saving control method and controller of central air conditioner
CN103486693A (en) * 2013-09-25 2014-01-01 广州大学 Energy-saving control method for central air-conditioning chilled water system
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107560118A (en) * 2017-09-12 2018-01-09 深圳达实智能股份有限公司 A kind of establishing method and device of hospital's refrigeration host computer chilled water supply water temperature
CN109654688A (en) * 2018-12-21 2019-04-19 珠海格力电器股份有限公司 Adjusting method, system and the air-conditioner set of air-conditioner set output power
CN110762732A (en) * 2019-10-30 2020-02-07 南京亚派软件技术有限公司 Chilled water supply water temperature setting method and system for refrigeration host of central air-conditioning system
CN110762732B (en) * 2019-10-30 2021-05-07 南京亚派软件技术有限公司 Chilled water supply water temperature setting method and system for refrigeration host of central air-conditioning system

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