CN205747235U - Cooling Towers hot and cold water mixed system when central air-conditioning refrigeration changes free refrigeration with plate - Google Patents
Cooling Towers hot and cold water mixed system when central air-conditioning refrigeration changes free refrigeration with plate Download PDFInfo
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- CN205747235U CN205747235U CN201620450356.XU CN201620450356U CN205747235U CN 205747235 U CN205747235 U CN 205747235U CN 201620450356 U CN201620450356 U CN 201620450356U CN 205747235 U CN205747235 U CN 205747235U
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Abstract
The mixed system of Cooling Towers hot and cold water and using method thereof when central air-conditioning refrigeration changes free refrigeration with plate, including temperature sensor T1 T6, pressure transducer P1 P4, the signal output part of described temperature sensor T1 T6 is identical with the signal input part of controller, the control signal outfan of controller and cooling water pump, the corresponding control signal input of blower fan of cooling tower is connected.Meeting central air-conditioning refrigeration system to work independently, plate changes free refrigeration system and works independently and central air-conditioning refrigeration changes the different demands of each cooling water under three kinds of operating modes of common refrigeration from plate.
Description
Technical field
This utility model relates to central air-conditioning and plate changes field, specifically by a kind of with pressure transducer and temperature sensor, controller realize central air conditioner system change free refrigeration system cooperation with plate time, solve the matching process that respective cooling water temperature demand is inconsistent.
Background technology
Central air-conditioning is air handling system indispensable in modern architecture or Production requirement.Air conditioning cooling water system is to deliver to outdoor heat abstractor for heat produced by central air-conditioning refrigeration to be aerated cooling, it may be assumed that end demand is heavily dependent on the duty of cooling system.Along with domestic economy develops, a large amount of manufacturability production lines and the generation of data center, it is dependent on greatly the operation of central air-conditioning.
Operation principle is as follows: 7 DEG C of chilled waters that chilled water pump makes central air conditioner main machine flow to indoor end, after end absorption cold, the water of about 12 DEG C is circulated again to air-conditioner host, air-conditioner host produces the cooling water of 37 DEG C and is delivered to cooling tower by cooling water pump while manufacturing chilled water, cooling tower is transmitted back to main frame, such iterative cycles this part cooling water temperature by blower fan after 32 DEG C again.As shown in Figure 1.
Owing to special industry such as special manufacturability production line and data center etc. there is also refrigeration demand in the winter time, the operation therefore it is required that central air conditioner system is started shooting throughout the year, special envoy is extremely to tremble with fear also to start shooting at temperature, causes system energy consumption excessive.
In order to solve the too high problem of energy consumption, during it is thought that outdoor temperature is relatively low in the winter time, when cooling tower leaving water temperature is low to when can meet indoor chilled water demand, stops central air conditioner main machine and use heat exchanger to directly utilize chilled water in cooling tower water at low temperature Supply House, it is achieved the way of free refrigeration.As shown in Figure 2.
Operation principle is as follows: when outdoor cooling tower return water temperature can not meet indoor end demand, close all valves of heat exchanger, normally-open main frame kind of refrigeration cycle；When outdoor cooling tower return water temperature disclosure satisfy that indoor end demand, close main frame Inlet and outlet water valve, open heat exchanger Inlet and outlet water valve, start free cooling condition.
But its drawback is: owing to outdoor environment temperature exists unpredictable change, causes frequently switching between main frame and free cold supply, for Large Central Air Conditioning System, switch frequently and can produce serious safety problem undoubtedly.Simultaneously because share one group of cooling tower, the water temperature of free cold supply is different from the water temperature of main frame cooling water, causes mixed water inside cooling tower, refrigeration host computer and heat exchanger can be caused time serious simultaneously to work.Similar this kind of problem, all can badly influence the stability of end demand.
In order to solve this problem, people take free cold supply and central air conditioner cooling system respectively with the method for one group of cooling tower, main frame and the cooling recirculation system of heat exchanger each self-configuring independence, judge to open refrigeration mode by outdoor temperature.As shown in Figure 3.
Operation principle is as follows: when outdoor cooling tower return water temperature can not meet indoor end demand, close all valves of heat exchanger, normally-open main frame kind of refrigeration cycle；When outdoor cooling tower return water temperature disclosure satisfy that indoor end demand, close main frame Inlet and outlet water valve, open heat exchanger Inlet and outlet water valve, start free cooling condition.When transition season, main frame and heat exchanger system are opened simultaneously, produce part cold by heat exchanger and meet end section refrigeration requirement, it is achieved the free cooling condition of whole system half, reduce machine room part energy consumption.
But its drawback is: although solving the frequent disadvantage switched and cooling tower between system to mix the generation of the phenomenon of water, but two overlap self-existent cooling recirculation system adds the cost of investment of equipment undoubtedly, can not make full use of the cooling capacity of cooling system corresponding to main frame when plate changes free cold supply simultaneously.During main frame refrigeration, main frame can not make full use of plate and change the cooling capacity of cooling circulation corresponding to free refrigeration in turn.
Summary of the invention
The purpose of this utility model is for the problems referred to above, propose a kind of to solve the cooling tower automatic switchover when hot and cold water is used with, the equipment investment of cooling recirculation system can be reduced simultaneously, realize cooling tower group to utilize and maximize, reach to maximize energy-saving benefit with the central air-conditioning refrigeration meeting terminal stabilization demand and change the mixed system of Cooling Towers hot and cold water and using method thereof when freely freezing with plate.
nullFor realizing this utility model purpose，Provide techniques below scheme: central air-conditioning refrigeration changes free Cooling Towers hot and cold water mixed system when freezing with plate，Including refrigeration host computer cooling cycle system、Heat exchanger cooling recirculation system，It is characterized in that refrigeration host computer cooling cycle system、Heat exchanger cooling recirculation system all includes demand end kind of refrigeration cycle and cooling tower cooling circulation，Described demand end kind of refrigeration cycle includes end、The circulating line being connected with cooling main frame and heat exchanger respectively，The cooling circulation of described cooling tower includes several cooling towers，Each cooling tower top all connects the shared water inlet pipe of two ends water inlet by arm，Each cooling tower bottom connects the shared outlet pipe of two ends water outlet by arm，By shared water inlet pipe and shared outlet pipe, each cooling tower is connected in parallel，Share water inlet pipe one end and connect refrigeration host computer by No. 1 inlet channel，Share the water inlet pipe other end and connect heat exchanger by No. 2 inlet channels，Share outlet pipe one end and connect refrigeration host computer by No. 1 outlet conduit，Share the outlet pipe other end and connect heat exchanger by No. 2 outlet conduits，It is provided with refrigerating water pump on the circulating line being connected with cooling main frame and heat exchanger，No. 1 cooling pump and No. 2 cooling pumps it are provided with on No. 1 outlet conduit and No. 2 outlet conduits.
nullAs preferably，Also include control system，Described control system includes controller、Pressure transducer (P1、P2、P3、P4)、Temperature sensor (T1、T2、T3、T4、T5、T6)，Pressure transducer (P1、P2、P3、P4)、Temperature sensor (T1、T2、T3、T4、T5、T6) all it is connected with controller input，Temperature sensor (T1)、Pressure transducer (P1) is arranged on No. 1 inlet channel，Temperature sensor (T2)、Pressure transducer (P2) is arranged on No. 2 inlet channels，Temperature sensor (T3)、Pressure transducer (P3) is arranged on No. 1 outlet conduit，Temperature sensor (T4)、Pressure transducer (P4) is arranged on No. 2 outlet conduits，No. 1 cooling pump and No. 2 cooling pumps are connected with controller input，Temperature sensor (T5、T6) it is arranged on circulating line.
For realizing this utility model purpose, it is provided that Cooling Towers hot and cold water mixed System Utilization Procedure when a kind of central air-conditioning refrigeration changes free refrigeration with plate, it is characterised in that comprise the following steps:
Parameter initialization: the freezing standard temperature approach of setting, cool down criteria temperature approach, plate change free refrigeration standard temperature approach；
nullCentral air-conditioning refrigeration system is activated individually: controller output starts No. 1 cooling pump、At least one cooling tower，By temperature sensor (T1)、Temperature sensor (T3) detection cools down real-time temperature approach，By pressure transducer (P1)、Pressure transducer (P3) detection cools down real-time pressure difference，If be detected that cool down real-time temperature approach less than cool down criteria temperature approach and cool down real-time pressure difference do not reach optimal value time，Then increase No. 1 cooling pump rotating speed or at least one blower fan of cooling tower rotating speed，After carrying out aforesaid operations，Continue through temperature sensor (T1)、Temperature sensor (T3) detection cools down real-time temperature approach，If be detected that cool down real-time temperature approach to be still below cool down criteria temperature approach，One or more cooling tower remaining is started by controller output，Increase one or more cooling tower remaining to be operated；Plate changes free refrigeration system system and is activated individually: controller output starts No. 2 cooling pumps, at least one cooling tower, simultaneously by measuring the real-time temperature approach between temperature sensor (T2), temperature sensor (T4), real-time pressure difference is cooled down by pressure transducer (P2), pressure transducer (P4) detection, if be detected that cool down real-time temperature approach less than plate change free refrigeration standard temperature approach and cool down real-time pressure difference do not reach optimal value time, then increase No. 2 cooling pump rotating speeds or the rotation speed of fan of at least one cooling tower；By again measuring the real-time temperature approach between temperature sensor (T2), temperature sensor (T4), if be detected that temperature approach changes free refrigeration standard temperature approach less than plate in real time, start remaining one or several cooling towers by controller output, increase remaining one or several cooling towers and be operated；
When transition season, individually open central air-conditioning refrigeration system energy consumption too high, individually opening board changes refrigeration system when cannot meet freezing demand, controller with temperature sensor (T5), temperature sensor (T6) the real-time temperature difference with the freezing standard temperature approach that sets as foundation, changed by pressure transducer (P1-P4) pressure, output startup 1 simultaneously and No. 2 cooling pumps and some cooling towers are controlled by control chamber, two common independent operatings of system, to meet central air conditioner main machine refrigeration system respectively and plate changes the cooling requirement of free refrigeration system；When measuring by the real-time temperature approach between temperature sensor (T1), temperature sensor (T3), if be detected that temperature approach is less than cool down criteria temperature approach in real time, then increase No. 1 cooling pump rotating speed or the rotation speed of fan of cooling tower；When measuring by the real-time temperature approach between temperature sensor (T2), temperature sensor (T4), if be detected that temperature approach changes free refrigeration standard temperature approach less than plate in real time, then increase No. 2 cooling pump rotating speeds or the rotation speed of fan of cooling tower.
This utility model beneficial effect: this utility model system each realizes the function according to the actual requirements of Auto-matching according to end demand, is designed by the technical optimization of cooling water pipe, adjusts cooling tower working quantity in real time.Simultaneously because cooling line optimization, decrease unnecessary valve, improve system effectiveness, reduce system failure rate.This utility model can automatically adjust power on mode according to the ruuning situation of end and be adjusted cooling tower working quantity in real time.This utility model can effectively solve the frequent disadvantage switched and cooling tower between system and mix the generation of the phenomenon of water.Greatly can be lightened one's labor person works's intensity simultaneously.This utility model can be according to end demand, it is ensured that the real-time matching of host computer system and cooling system runs.
Accompanying drawing explanation
Fig. 1 is the structural representation of central air-conditioning refrigeration host computer system.
Fig. 2 is that the free plate that increases solving the too high problem employing of refrigeration host computer system energy consumption changes used structural representation.
Fig. 3 is to solve cooling tower in prior art to produce the structural representation that mixed water frequent starting problem is used.
Fig. 4 is structural representation of the present utility model.
Fig. 5 is this utility model control system schematic diagram.
Detailed description of the invention
nullEmbodiment 1: Cooling Towers hot and cold water mixed system when central air-conditioning refrigeration changes free refrigeration with plate，Including refrigeration host computer cooling cycle system、Heat exchanger cooling recirculation system，Refrigeration host computer cooling cycle system、Heat exchanger cooling recirculation system all includes demand end kind of refrigeration cycle and cooling tower cooling circulation，Described demand end kind of refrigeration cycle includes end 1.1、The circulating line 1.4 being connected with cooling main frame 1.2 and heat exchanger 1.3 respectively，The cooling circulation of described cooling tower includes several cooling towers 2.1，Each cooling tower 2.1 top all connects the shared water inlet pipe 3 of two ends water inlet by arm，Each cooling tower bottom connects the shared outlet pipe 4 of two ends water outlet by arm，By shared water inlet pipe 3 and shared outlet pipe 4, each cooling tower 2.1 is connected in parallel，Share water inlet pipe 3 one end and connect refrigeration host computer 1.2 by No. 1 inlet channel 5，Share water inlet pipe 3 other end and connect heat exchanger 1.3 by No. 2 inlet channels 6，Share outlet pipe 4 one end and connect refrigeration host computer 1.2 by No. 1 outlet conduit 7，Share outlet pipe 4 other end and connect heat exchanger 1.3 by No. 2 outlet conduits 8，It is provided with refrigerating water pump 9 on the circulating line 1.4 being connected with cooling main frame 1.2 and heat exchanger 1.3，No. 1 cooling pump 10 and No. 2 cooling pumps 11 it are provided with on No. 1 outlet conduit 7 and No. 2 outlet conduits 7.Described control system includes controller, pressure transducer P1, P2, P3, P4, temperature sensor T1, T2, T3, T4, T5, T6, pressure transducer P1, P2, P3, P4, temperature sensor T1, T2, T3, T4, T5, T6 is all connected with controller input, temperature sensor T1, pressure transducer P1 is arranged on No. 1 inlet channel, temperature sensor T2, pressure transducer P2 is arranged on No. 2 inlet channels, temperature sensor T3, pressure transducer P3 is arranged on No. 1 outlet conduit, temperature sensor T4, pressure transducer P4 is arranged on No. 2 outlet conduits, No. 1 cooling pump and No. 2 cooling pumps are connected with controller input, temperature sensor T5, T6 is arranged on circulating line.
Embodiment 2: parameter initialization: set freezing standard temperature approach 5-10 DEG C, set cool down criteria temperature approach 20-35 DEG C, sets plate and changes free refrigeration standard temperature approach 20-35 DEG C, and the temperature approach at end chilled water two ends is 2-15 DEG C；nullCentral air-conditioning refrigeration system is activated individually: controller output starts No. 1 cooling pump、Cooling tower (I、II),By temperature sensor (T1)、Temperature sensor (T3) detection cools down real-time temperature approach，By pressure transducer (P1)、Pressure transducer (P3) detection cools down real-time pressure difference，If be detected that cool down real-time temperature approach less than cool down criteria temperature approach and cool down real-time pressure difference do not reach optimal value time，Then increase No. 1 cooling pump rotating speed or cooling tower (I、II) rotation speed of fan，After carrying out aforesaid operations，Continue through temperature sensor (T1)、Temperature sensor (T3) detection cools down real-time temperature approach，If be detected that cool down real-time temperature approach to be still below cool down criteria temperature approach，Cooling tower (III) is started by controller output，Increase cooling tower (III) and be incorporated to cooling tower (I、II) it is operated.
Embodiment 3: parameter initialization: set freezing standard temperature approach 5-10 DEG C, set cool down criteria temperature approach 20-35 DEG C, sets plate and changes free refrigeration standard temperature approach 20-35 DEG C, and the temperature approach at end chilled water two ends is 2-15 DEG C；Plate changes free refrigeration system system and is activated individually: controller output starts No. 2 cooling pumps, cooling tower (III), simultaneously by measuring the real-time temperature approach between temperature sensor (T2), temperature sensor (T4), real-time pressure difference is cooled down by pressure transducer (P2), pressure transducer (P4) detection, if be detected that cool down real-time temperature approach less than plate change free refrigeration standard temperature approach and cool down real-time pressure difference do not reach optimal value time, then increase No. 2 cooling pump rotating speeds or the rotation speed of fan of cooling tower (III)；By again measuring the real-time temperature approach between temperature sensor (T2), temperature sensor (T4), if be detected that temperature approach changes free refrigeration standard temperature approach less than plate in real time, starting cooling tower (I, II) by controller output, increase cooling tower (I, II) is incorporated to cooling tower (III) and is operated.
Embodiment 4: parameter initialization: set freezing standard temperature approach 5-10 DEG C, set cool down criteria temperature approach 20-35 DEG C, sets plate and changes free refrigeration standard temperature approach 20-35 DEG C, and the temperature approach at end chilled water two ends is 2-15 DEG C；When transition season, individually open central air-conditioning refrigeration system energy consumption too high, individually opening board changes refrigeration system when cannot meet freezing demand, controller with temperature sensor (T5), temperature sensor (T6) the real-time temperature difference with the freezing standard temperature approach that sets as foundation, changed by pressure transducer (P1-P4) pressure, controlled output by control chamber and start No. 1 and No. 2 cooling pumps, cooling tower (I, II, III), two common independent operatings of system, to meet central air conditioner main machine refrigeration system respectively and plate changes the cooling requirement of free refrigeration system；When measuring by the real-time temperature approach between temperature sensor (T1), temperature sensor (T3), if be detected that temperature approach is less than cool down criteria temperature approach in real time, then increase No. 1 cooling pump rotating speed or the rotation speed of fan of cooling tower (I, II)；When measuring by the real-time temperature approach between temperature sensor (T2), temperature sensor (T4), if be detected that temperature approach changes free refrigeration standard temperature approach less than plate in real time, then increase No. 2 cooling pump rotating speeds or the rotation speed of fan of cooling tower (III).
Embodiment 5: freezing standard temperature approach is 7(± 2) DEG C, cool down criteria temperature approach is 5 DEG C, it is 2 DEG C that plate changes free refrigeration standard temperature approach, it may be assumed that central air-conditioning refrigeration system freezing water outlet can meet terminal temperature demand, and plate changes colling end supply water temperature can meet terminal temperature demand.Plate changes free refrigeration system system when being activated individually, end freezing tapers into for difference of rising again, by pressure transducer (P1), pressure transducer (P3) detection cools down real-time pressure difference, controller output control signal drives No. 1 cooling pump start and be gradually increased flow, central air-conditioning refrigeration system starts kind of refrigeration cycle, by pressure transducer (P2), pressure transducer (P4) detection cools down real-time pressure difference, controller output control signal drives cooling pump (II) to be gradually reduced flow to quitting work, plate changes free refrigeration system and completely closes, until end freezing reaches established standards temperature approach for difference of rising again.
Embodiment 5: freezing standard temperature approach is 7(± 2) DEG C, cool down criteria temperature approach is 5 DEG C, it is 2 DEG C that plate changes free refrigeration standard temperature approach, it may be assumed that central air-conditioning refrigeration system freezing water outlet can meet terminal temperature demand, and plate changes colling end supply water temperature can meet terminal temperature demand.Central air-conditioning refrigeration system is activated individually, end freezing becomes larger for difference of rising again, by pressure transducer (P2), pressure transducer (P4) detection cools down real-time pressure difference, controller output No. 2 cooling pumps of control signal start and are gradually increased flow, plate changes free refrigeration system and starts kind of refrigeration cycle, and by pressure transducer P1, pressure transducer P3 detection cools down real-time pressure difference, controller output control signal drives No. 1 cooling pump to be gradually reduced flow to quitting work, central air-conditioning refrigeration system completely closes, until end freezing reaches established standards temperature approach for difference of rising again.
Claims (2)
- null1. Cooling Towers hot and cold water mixed system when central air-conditioning refrigeration changes free refrigeration with plate，Including refrigeration host computer cooling cycle system、Heat exchanger cooling recirculation system，It is characterized in that refrigeration host computer cooling cycle system、Heat exchanger cooling recirculation system all includes demand end kind of refrigeration cycle and cooling tower cooling circulation，Described demand end kind of refrigeration cycle includes end、The circulating line being connected with cooling main frame and heat exchanger respectively，The cooling circulation of described cooling tower includes several cooling towers，Each cooling tower top all connects the shared water inlet pipe of two ends water inlet by arm，Each cooling tower bottom connects the shared outlet pipe of two ends water outlet by arm，By shared water inlet pipe and shared outlet pipe, each cooling tower is connected in parallel，Share water inlet pipe one end and connect refrigeration host computer by No. 1 inlet channel，Share the water inlet pipe other end and connect heat exchanger by No. 2 inlet channels，Share outlet pipe one end and connect refrigeration host computer by No. 1 outlet conduit，Share the outlet pipe other end and connect heat exchanger by No. 2 outlet conduits，It is provided with refrigerating water pump on the circulating line being connected with cooling main frame and heat exchanger，No. 1 cooling pump and No. 2 cooling pumps it are provided with on No. 1 outlet conduit and No. 2 outlet conduits.
- nullCooling Towers hot and cold water mixed system when central air-conditioning the most according to claim 1 refrigeration changes free refrigeration with plate，Characterized by further comprising control system，Described control system includes controller、Pressure transducer (P1、P2、P3、P4)、Temperature sensor (T1、T2、T3、T4、T5、T6)，Pressure transducer (P1、P2、P3、P4)、Temperature sensor (T1、T2、T3、T4、T5、T6) all it is connected with controller input，Temperature sensor (T1)、Pressure transducer (P1) is arranged on No. 1 inlet channel，Temperature sensor (T2)、Pressure transducer (P2) is arranged on No. 2 inlet channels，Temperature sensor (T3)、Pressure transducer (P3) is arranged on No. 1 outlet conduit，Temperature sensor (T4)、Pressure transducer (P4) is arranged on No. 2 outlet conduits，No. 1 cooling pump and No. 2 cooling pumps are connected with controller input，Temperature sensor (T5、T6) it is arranged on circulating line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620450356.XU CN205747235U (en) | 2016-05-18 | 2016-05-18 | Cooling Towers hot and cold water mixed system when central air-conditioning refrigeration changes free refrigeration with plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620450356.XU CN205747235U (en) | 2016-05-18 | 2016-05-18 | Cooling Towers hot and cold water mixed system when central air-conditioning refrigeration changes free refrigeration with plate |
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| CN205747235U true CN205747235U (en) | 2016-11-30 |
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| CN201620450356.XU Active CN205747235U (en) | 2016-05-18 | 2016-05-18 | Cooling Towers hot and cold water mixed system when central air-conditioning refrigeration changes free refrigeration with plate |
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