CN103162364A - Water storage and ice storage tandem type central air conditioning system and operating method thereof - Google Patents

Water storage and ice storage tandem type central air conditioning system and operating method thereof Download PDF

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CN103162364A
CN103162364A CN2013101093140A CN201310109314A CN103162364A CN 103162364 A CN103162364 A CN 103162364A CN 2013101093140 A CN2013101093140 A CN 2013101093140A CN 201310109314 A CN201310109314 A CN 201310109314A CN 103162364 A CN103162364 A CN 103162364A
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water
valve
ice
cold
refrigeration unit
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CN2013101093140A
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Chinese (zh)
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CN103162364B (en
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王春生
姚博
朱彤
宋旭
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深圳市中鼎空调净化有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14Thermal energy storage

Abstract

The invention discloses a water storage and ice storage tandem type central air conditioning system and an operating method thereof. The system comprises a first refrigerating machine unit, a second refrigerating machine unit, an ice storage machine unit, a water segregator, a plurality of fan coils and a water collector, wherein the first refrigerating machine unit and the second refrigerating machine unit are arranged in parallel, the water segregator is connected with a freezing water pipe, the fan coils are connected with the water segregator, and the water collector is connected with the refrigerating machine units through water return pipes. The system further comprises water storage circulation and ice storage circulation, wherein the water storage circulation is arranged in parallel with the first refrigerating machine unit and the second refrigerating machine unit, the ice storage circulation and the water storage circulation are arranged in series, a cool water storage pool of the water storage circulation and cool water in an ice storage pool of the ice storage machine unit conduct heat exchanging with air conditioning chilled water through a plate heat exchanger, and pipelines are connected through an electronic control valve and a water pump. According to the water storage and ice storage tandem type central air conditioning system and the operating method, the dual function of full load operating of a main machine and load shifting to electricity consumption in the central air conditioning system is achieved.

Description

Water cold-storage and ice cold-storage tandem center air-conditioning system and operation method thereof
Technical field
The present invention relates to refrigeration plant, relate in particular to a kind of water cold-storage and ice cold-storage tandem center air-conditioning system and operation method thereof.
Background technology
Modern air conditioning equipment become people produce with life in the urgent need to, in big-and-middle-sized building widely used central air conditioning oneself become important large electricity consumer, the ratio of air conditioning energy consumption in the total power consumption of national economy is up to 20%~30%.And the energy consumption of air conditioner cold-heat origin system accounts for 40%~60% of air-conditioning total energy consumption, and wherein most of air-conditioning equipment is mainly to move by day, and this is also the one of the main reasons that causes the electrical network peak-valley difference.For this problem, Chinese patent " multitime water cold-storage type central air-conditioning system ", the patent No. 200820091877.6 has proposed a solution, but the mentioned central air conditioner system of above-mentioned patent can not guarantee that the paddy electricity price period at night all is utilized to carry out cold-storage.
Summary of the invention
The present invention is directed to the defective that above-mentioned prior art exists, propose a kind of water cold-storage and ice cold-storage tandem center air-conditioning system and operation method thereof.
the water cold-storage that the present invention proposes comprises with ice cold-storage tandem center air-conditioning system: be arranged in parallel first, the second refrigeration unit, the ice-reserving unit, the water knockout drum that is connected with chilled water pipe, a plurality of fan coils that are connected with water knockout drum and the water collector that is connected with refrigeration unit by return pipe, also comprise one and described first, the ice charge cycle of the water charge cycle that the second refrigeration unit is arranged in parallel and one and water cold-storage arranged in series, the cold-storage water of the ice bank of the water storage pool of water charge cycle and ice-reserving unit all carries out heat exchange by plate type heat exchanger and air conditioning water, be connected with water pump by electric control valve between each connecting pipe.
Described ice bank and water storage pool arranged in series, the water at low temperature of water storage pool is introduced ice bank by water pump, regulate by related valve subsequently, make the water at low temperature of introducing adopt flake ice formula cold accumulation system to carry out ice making, after ice bank let cool, ice-melt water flow back into water storage pool by the top of water pump from water storage pool again.
The present invention also proposes the operation method of a kind of water cold-storage and ice cold-storage tandem center air-conditioning system, and described method adopts following five kinds of mode operations: the direct cooling pattern of refrigeration unit, single cold-storage pattern, cold-storage limit, limit cooling pattern, singlely let cool pattern and the cooling pattern while letting cool.
Compared with prior art, the water cold-storage that the present invention proposes not only can guarantee the oepration at full load of central air-conditioning unit with ice cold-storage tandem center air-conditioning system and operation method thereof, also take full advantage of simultaneously relatively cheap paddy electricity electricity price at night, realized the central air conditioner system oepration at full load and to the double action of the peak load shifting of power consumption.
Description of drawings
Fig. 1 is the system diagram of one embodiment of the invention.
The specific embodiment
Below in conjunction with drawings and Examples, invention is described in detail.
As shown in Figure 1, the water cold-storage that the present invention proposes and ice cold-storage tandem center air-conditioning system comprise a plurality of the first and second refrigeration unit 8 that are arranged in parallel, 9 and ice-reserving unit 12, the water knockout drum 11 that is connected with chilled water pipe, a plurality of fan coils 10 that are connected with water knockout drum and the water collector 7 that is connected with refrigeration unit by return pipe, also comprise a water storage pool 4 that is arranged in parallel with first, second refrigeration unit, this water storage pool is generally the fire cistern of building, for open type, can be also enclosed, water storage pool be arranged upper water distributor 5 and lower water-dispensing device 6.With the water storage pool arranged in series be an ice bank 1, ice-reserving adopts sliding type flake ice cold-storage mode, be furnished with ice making heat exchanger 2 and water-locator 3 above ice bank 1, during the ice bank ice-reserving, 4 ℃, the cold water of water storage pool 4 is sprayed to ice making evaporator 2 surfaces of sliding type flake ice system, after made flake ice reaches certain thickness, landing enters ice bank 1 ice-reserving; When the needs ice bank let cool, high-temperature water after water storage pool 4 is let cool was introduced ice bank 1, melts flake ice, carried out sliding type flake ice system and let cool, and sent whole ice-melt water back to water storage pool 4 again after letting cool end.Cold-storage water and ice-reserving water all carry out heat exchange by plate type heat exchanger 13 and air conditioning water, regulate by variable frequency pump P5 through the cold-storage water of plate type heat exchanger and the flow of ice-reserving water, and chilled-water flow is regulated by variable frequency pump P6.
Any one or two in first, second refrigeration unit 8,9 are for water storage pool 4 provides cold, and its import is provided with the water pump P 4 that overcomes refrigeration machine and water storage pool resistance.In discharging cold course, refrigeration unit 8,9 and plate type heat exchanger 13 be arranged in parallel, the cold water in air conditioning water and water storage pool 4 or ice bank 1 carries out heat exchange in plate type heat exchanger 13.Water storage pool 4 inside are provided with upper water distributor 5 and lower water-dispensing device 6, leave certain space between water storage pool 4 tops and upper water distributor 5, and this part space is used for storing sliding type sheet ice-storage system in the needed water yield of ice-making process.
Ice bank 1 and water storage pool 4 arranged in series, 4 ℃ of water storage pool water at low temperature are introduced ice bank 1 by water pump P 1, introduce a certain amount of after, valve-off V16, make this part water by the pumping of water pump P 1, return ice bank 1 and carry out circulation ice-making through valve V15, water-locator 3, ice making evaporator 2, open simultaneously ice-reserving unit 12, the ice making cool water quantity is not enough, and Open valve V16 replenishes cold water again.The ice bank discharging cold course, also need a part of water in water storage pool 4 is introduced in ice bank 1 by water pump P 1, introduce a certain amount of after, valve-off V16, let cool the pumping of water by variable frequency pump P5, return ice bank 1 through valve V17, plate type heat exchanger 13, valve V14 and carry out ice-melt and let cool.After discharging cold course finished, the flake ice ice-melt water in ice bank 1 flow back into water storage pool 4 from water storage pool upper water distributor 5 by variable frequency pump P5 again.
The present invention has not only adopted water cold-storage mode, the cover sliding type flake ice ice storage system of having connected on the chilled water storage system basis, daytime the customer charge demand hour, the refrigeration unit load is greater than customer charge, the redundance load can be used for the water cold-storage, thereby guarantees that refrigeration unit is in efficient traffic coverage work.When the customer charge demand was larger, refrigeration unit was loaded less than customer charge, and insufficient section replenishes with cold-storage water or ice-reserving, and the water process of cool can repeatedly, make unit all the time in lower operation at full capacity every day.and be mainly the paddy electricity price period at night, because the water cold-storage belongs to the sensible heat cold-storage, storage density of cold is little, cold-storage volume demand is large, water storage pool is generally the building ' s fire pond, volume limits, therefore water cold-storage cool-storage time is shorter, utilize the paddy electricity price period at night very limited, can not be all with its utilization, and the ice cold-storage belongs to the latent heat cold-storage, storage density of cold is large, carry out cold and store therefore increase the sheet ice-storage system and then can take full advantage of the paddy electricity price period at night, because flake ice cold-storage unit efficiency is low than the conventional air-conditioning unit, at the peak electricity, it is uneconomical that the ordinary telegram period is opened operation, therefore the flake ice cold-storage is mainly used in the paddy electricity price period at night.Repeatedly water cold-storage and sliding type flake ice cold-storage tandem center air-conditioning system, contrasting conventional central air conditioner system initial cost increases to some extent, but can correspondingly reduce the refrigeration host computer capacity, daytime, not enough load can be replenished by sheet ice-storage system institute cold storage capacity, compare with chilled water storage system, not only make up the little defective of water cold-storage storage density of cold, also the peak electricity tariff on daytime has been transferred to the low ebb electricity price at night simultaneously, reduced the average electricity price of air-conditioning system.The reduction of its operating cost is far away higher than the increase of initial cost, in the long term, because repeatedly water cold-storage and sliding type flake ice cold-storage tandem center air-conditioning system can be with the power consumption homogenising, i.e. peak load shifting is therefore its reduction to power plant's energy consumption has certain effect.
The water cold-storage that the present invention proposes and ice cold-storage tandem center air-conditioning system are when operation, can be divided into the direct cooling pattern of unit, single cold-storage pattern, cold-storage limit, limit cooling pattern, singlely let cool pattern, while letting cool five kinds of operational modes of cooling pattern, wherein can be according to Pinggu electricity price period of different periods is carried out repeatedly water cold-storage in the daytime.Its operation method is as follows:
(1) the direct cooling pattern of unit
The first direct cooling operating mode of refrigeration unit: Open valve V1, V7, V11 and water pump P 3, P7, other valve and water pump are all closed.Air conditioning water through water pump P 3 effects, enters first refrigeration unit 8 refrigeration through valve V1 from water collector 7, and after refrigeration, cryogenic freezing water enters water knockout drum 11 for user's refrigeration through valve V7.
The second direct cooling operating mode of refrigeration unit: Open valve V4, V8, V12 and water pump P 3, P7, other valve and water pump are all closed.Air conditioning water through water pump P 3 effects, enters second refrigeration unit 9 refrigeration through valve V4 from water collector 7, and after refrigeration, cryogenic freezing water enters water knockout drum 11 for user's refrigeration through valve V8.
The simultaneously direct cooling operating mode of first, second refrigeration unit: Open valve V1, V4, V7, V8, V11, V12 and water pump P 3, P7, other valve and water pump are all closed.Its method of operation is the in parallel of two kinds of methods of operation of aforementioned the first direct cooling of refrigeration unit and the second direct cooling of refrigeration unit.
(2) single cold-storage pattern
The first refrigeration unit water charging: Open valve V2, V9, V11 and water pump P 4, P7, other valve and water pump are all closed.The high-temperature water on water storage pool 4 tops through water pump P 4 effect, enters first refrigeration unit 8 refrigeration through valve V2 from upper water distributor 5, and after refrigeration, low-temperature cold water returns to water storage pool through valve V9 from the lower water-dispensing device 6 of water storage pool 4 bottoms and carries out the water cold-storage.
The second refrigeration unit water charging: Open valve V3, V10, V12 and water pump P 4, P7, other valve and water pump are all closed.The high-temperature water on water storage pool 4 tops through water pump P 4 effect, enters second refrigeration unit 9 refrigeration through valve V3 from upper water distributor 5, and after refrigeration, low-temperature cold water returns to water storage pool through valve V10 from the lower water-dispensing device 6 of water storage pool 4 bottoms and carries out the water cold-storage.
Sliding type flake ice ice-reserving operating mode: there is no water in ice bank 1 before cold-storage, after the water cold-storage finishes, first Open valve V15, V16 and water pump P 1, other valve and water pump are all closed.the water at low temperature that store in water storage pool 4 this moment is from the effect through water pump P 1 of the lower water-dispensing device 6 of water storage pool 4 bottoms, introduce ice bank 1 through ice making heat exchanger 2 from water-locator 3 through valve V15, after arriving certain liquid level, by the fluid level control device control that links, valve V16 is closed, while Open valve V13, V18 and water pump P 2, P7, beginning sliding type flake ice cold-storage, just entered cold water in ice bank 1 through the effect of water pump P 1, through valve V18, V15 is made into flake ice from water-locator 3 through ice making heat exchanger 2, the cold water that does not freeze is got back to ice bank 1 ice making again again, after ice sheet reaches certain thickness, by ice making unit 12, ice sheet is removed, flake ice falls into ice bank 1 and stores, ice-reserving unit 12, ice making heat exchanger 2, water pump P 2 consists of ice making unit refrigerant circulation loop.Along with ice-making process constantly carries out, in ice bank 1, liquid level constantly descends, when dropping to the bottom limit level place, by the fluid level control device control that links, valve V13, V18 and water pump P 2, P7 are closed, while Open valve V16, then replenish the required cold water of ice making from water storage pool 4, operation so repeatedly is until reach required ice-making capacity.
(3) limit cold-storage limit cooling pattern
The first cold-storage limit, refrigeration unit limit cooling operating mode: Open valve V2, V5, V6, V9, V11 and water pump P 4, P5, P6, P7, other valve and water pump are all closed.The cold water that makes from the first refrigeration unit 8 enters water storage pool 4 cold-storages through a valve V9 part, a part enters plate type heat exchanger 13 through valve V6 and lets cool to user's side, high-temperature water after water storage pool 4 top high-temperature water and plate type heat exchanger 13 heat exchange converges through water pump P 4 effect, enters the first refrigeration unit 8 through valve V2 cooled.Air conditioning water enters plate type heat exchanger 13 and lets cool the water heat exchange from water collector 7, and after heat exchange, cryogenic freezing water enters water knockout drum 11 for user's refrigeration.Cold-storage, the amount of letting cool are controlled according to temperature by variable frequency pump P5, P6.
The second cold-storage limit, refrigeration unit limit cooling operating mode: Open valve V3, V5, V6, V10, V12 and water pump P 4, P5, P6, P7, other valve and water pump are all closed.The cold water that makes from the second refrigeration unit 9 enters water storage pool 4 cold-storages through a valve V10 part, a part enters plate type heat exchanger 13 through valve V6 and lets cool to user's side, high-temperature water after water storage pool 4 top high-temperature water and plate type heat exchanger 13 heat exchange converges through water pump P 4 effect, enters the second refrigeration unit 9 through valve V3 cooled.Air conditioning water enters plate type heat exchanger 13 and lets cool the water heat exchange from water collector 7, and after heat exchange, cryogenic freezing water enters water knockout drum 11 for user's refrigeration.Cold-storage, the amount of letting cool are controlled according to temperature by variable frequency pump P5, P6.
First refrigeration unit water cold-storage the second refrigeration unit cooling operating mode: Open valve V2, V4, V8, V9, V11, V12 and water pump P 3, P4, P7, other valve and water pump are all closed.Its method of operation is the in parallel of two kinds of methods of operation of aforementioned the first refrigeration unit water cold-storage and the second direct cooling of refrigeration unit.
Second refrigeration unit water cold-storage the first refrigeration unit cooling operating mode: Open valve V1, V3, V7, V10, V11, V12 and water pump P 3, P4, P7, other valve and water pump are all closed.Its method of operation is the in parallel of two kinds of methods of operation of aforementioned the second refrigeration unit water cold-storage and the first direct cooling of refrigeration unit.
First cold-storage limit, refrigeration unit limit cooling the second refrigeration unit cooling operating mode: Open valve V2, V4, V5, V6, V8, V9, V11, V12 and water pump P 3, P4, P5, P6, P7, other valve and water pump are all closed.What its method of operation was aforementioned the first cold-storage limit, refrigeration unit limit cooling with two kinds of methods of operation of the second direct cooling of refrigeration unit is in parallel.
Second cold-storage limit, refrigeration unit limit cooling the first refrigeration unit cooling operating mode: Open valve V1, V3, V5, V6, V7, V10, V11, V12 and water pump P 3, P4, P5, P6, P7, other valve and water pump are all closed.What its method of operation was aforementioned the second cold-storage limit, refrigeration unit limit cooling with two kinds of methods of operation of the first direct cooling of refrigeration unit is in parallel.
(4) the single pattern that lets cool
The water storage pool discharging: Open valve V5, V6 and water pump P 5, P6, other valve and water pump are all closed.Cold-storage water enters plate type heat exchanger 13 from water storage pool 4 lower water-dispensing devices 6 through valve V6 and lets cool to user's side, lets cool by valve V5 and returns to water storage pool 4 from upper water distributor 5.Simultaneously, air conditioning water enters plate type heat exchanger 13 and lets cool the water heat exchange from water collector 7, and after heat exchange, cryogenic freezing water enters water knockout drum 11 for user's refrigeration, lets cool water and chilled-water flow and is controlled by variable frequency pump P5, P6 respectively.
Sliding type flake ice discharging: after water storage pool lets cool end, first Open valve V15, V16 and water pump P 1, other valve and water pump are all closed.high-temperature water after let cool in water storage pool 4 this moment is from the effect through water pump P 1 of the lower water-dispensing device 6 of water storage pool 4 bottoms, through valve V16, V15 introduces ice bank 1 through ice making heat exchanger 2 from water-locator 3, after arriving certain liquid level, by the fluid level control device control that links, valve-off V15, V16 and water pump P 1, while Open valve V14, V17, V18 and water pump P 5, P6, beginning sliding type flake ice lets cool, entered just that in ice bank 1, a certain amount of high-temperature water melts a part fast with the flake ice that stores, low temperature ice-melt water is through water pump P 5 effects, through valve V18, V17 enters plate type heat exchanger 13 and lets cool to user's side, high-temperature molten frozen water after letting cool is through valve V14, water-locator 3 and ice making heat exchanger 2 return in ice bank 1 and continue ice-melt.Simultaneously, air conditioning water enters plate type heat exchanger 13 and the heat exchange of low temperature ice-melt water from water collector 7, and after heat exchange, cryogenic freezing water enters water knockout drum 11 for user's refrigeration, and low temperature ice-melt water and chilled-water flow are controlled by variable frequency pump P5, P6 respectively.
(5) the cooling pattern while letting cool
Water storage pool lets cool the first refrigeration unit cooling operating mode: Open valve V1, V5, V6, V7, V11 and water pump P 3, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that water storage pool lets cool in parallel with two kinds of methods of operation of the first direct cooling of refrigeration unit.
Water storage pool lets cool the second refrigeration unit cooling operating mode: Open valve V4, V5, V6, V8, V12 and water pump P 3, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that water storage pool lets cool in parallel with two kinds of methods of operation of the second direct cooling of refrigeration unit.
Water storage pool lets cool first, second refrigeration unit cooling operating mode simultaneously: Open valve V1, V4, V5, V6, V7, V8, V11, V12 and water pump P 3, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that water storage pool lets cool and first, second refrigeration unit direct two kinds of methods of operation of cooling in parallel simultaneously.
The sliding type flake ice lets cool the first refrigeration unit cooling operating mode: Open valve V1, V7, V11, V14, V17, V18 and water pump P 3, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that the sliding type flake ice lets cool in parallel with two kinds of methods of operation of the first direct cooling of refrigeration unit.
The sliding type flake ice lets cool the second refrigeration unit cooling operating mode: Open valve V4, V8, V12, V14, V17, V18 and water pump P 3, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that the sliding type flake ice lets cool in parallel with two kinds of methods of operation of the second direct cooling of refrigeration unit.
The sliding type flake ice lets cool first, second refrigeration unit cooling operating mode simultaneously: Open valve V1, V4, V7, V8, V11, V12, V14, V17, V18 and water pump P 3, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that the sliding type flake ice lets cool and first, second refrigeration unit direct two kinds of methods of operation of cooling in parallel simultaneously.
After the sliding type flake ice lets cool and finishes fully, Open valve V5, V17, V18 and water pump P 5, other valve and water pump are all closed.All ice-melt water turns back to water storage pool 4 from water storage pool 4 upper water distributors 5 through valve V18, V17, V5 through the effect of water pump P 5.
Following table is the operation strategy of 5 kinds of operational modes.

Claims (10)

1. a water cold-storage and ice cold-storage tandem center air-conditioning system, is characterized in that, this system comprises: first, second refrigeration unit that is arranged in parallel (8,9) and ice-reserving unit (12); The water knockout drum that is connected with chilled water pipe (11), a plurality of fan coils (10) that are connected with water knockout drum and the water collector (7) that is connected with refrigeration unit by return pipe; Also comprise a charge cycle that is arranged in parallel with described first, second refrigeration unit, this charge cycle comprises water storage pool (4) and the ice bank (1) of series connection, cold-storage water and ice-reserving water all carry out heat exchange by plate type heat exchanger (13) and air conditioning water, between each connecting pipe by electric control valve (V1 ?V18) be connected with water pump P1 ?P7) connection.
2. central air conditioner system according to claim 1, it is characterized in that: described ice bank (1) and water storage pool (4) arranged in series, the water at low temperature of water storage pool is introduced ice bank (1) by water pump (P1), regulate by related valve subsequently, make the water at low temperature of introducing adopt flake ice formula cold accumulation system to carry out ice making, after ice bank let cool, ice-melt water flow back into water storage pool (4) by the top of water pump (P5) from water storage pool again.
3. central air conditioner system according to claim 2, it is characterized in that: described water storage pool (4) inside is provided with upper water distributor (5) and lower water-dispensing device (6), leave certain space between water storage pool (4) top and upper water distributor (5), this part space is used for storing the needed water yield of ice-reserving process.
4. central air conditioner system according to claim 2, is characterized in that: described ice bank (1) employing sliding type flake ice cold-storage mode ice-reserving.
5. the operation method of a water cold-storage and ice cold-storage tandem center air-conditioning system, it is characterized in that, described method adopts following five kinds of mode operations: the direct cooling pattern of refrigeration unit, single cold-storage pattern, cold-storage limit, limit cooling pattern, singlely let cool pattern and the cooling pattern while letting cool.
6. method according to claim 5, is characterized in that, the direct cooling pattern of described refrigeration unit comprises three kinds of operating modes:
The first direct cooling operating mode of refrigeration unit: Open valve V1, V7, V11 and water pump P 3, P7, other valve and water pump are all closed, air conditioning water acts on through water pump P 3 from water collector (7), enter the first refrigeration unit (8) refrigeration through valve V1, after refrigeration, cryogenic freezing water enters water knockout drum (11) for user's refrigeration through valve V7;
The second direct cooling operating mode of refrigeration unit: Open valve V4, V8, V12 and water pump P 3, P7, other valve and water pump are all closed, air conditioning water acts on through water pump P 3 from water collector (7), enter the second refrigeration unit (9) refrigeration through valve V4, after refrigeration, cryogenic freezing water enters water knockout drum (11) for user's refrigeration through valve V8;
The simultaneously direct cooling operating mode of first, second refrigeration unit: Open valve V1, V4, V7, V8, V11, V12 and water pump P 3, P7, other valve and water pump are all closed, and this method of operation is the in parallel of two kinds of methods of operation of the first direct cooling of refrigeration unit and the second direct cooling of refrigeration unit.
7. method according to claim 5, is characterized in that, described single cold-storage pattern comprises three kinds of operating modes:
The first refrigeration unit water charging: Open valve V2, V9, V11 and water pump P 4, P7, other valve and water pump are all closed, the high-temperature water on water storage pool (4) top acts on through water pump P 4 from upper water distributor (5), enter the first refrigeration unit (8) refrigeration through valve V2, after refrigeration, low-temperature cold water returns to water storage pool through valve V9 from the lower water-dispensing device (6) of water storage pool (4) bottom and carries out the water cold-storage;
The second refrigeration unit water charging: Open valve V3, V10, V12 and water pump P 4, P7, other valve and water pump are all closed, the high-temperature water on water storage pool (4) top acts on through water pump P 4 from upper water distributor (5), enter the second refrigeration unit (9) refrigeration through valve V3, after refrigeration, low-temperature cold water returns to water storage pool through valve V10 from the lower water-dispensing device (6) of water storage pool (4) bottom and carries out the water cold-storage;
sliding type flake ice ice-reserving operating mode: there is no water in ice bank (1) before cold-storage, after the water cold-storage finishes, first Open valve V15, V16 and water pump P 1, other valve and water pump are all closed, the water at low temperature that stores in this moment water storage pool (4) is from the effect through water pump P 1 of the lower water-dispensing device (6) of water storage pool (4) bottom, introduce ice bank (1) through ice making evaporator (2) from water-locator (3) through valve V15, after arriving certain liquid level, by the fluid level control device control that links, valve V16 is closed, while Open valve V13, V18 and water pump P 2, P7, beginning sliding type flake ice cold-storage, just entered cold water in ice bank (1) through the effect of water pump P 1, through valve V18, V15 is made into flake ice from water-locator (3) through ice making evaporator (2), the cold water that does not freeze is got back to ice bank (1) ice making again, after ice sheet reaches certain thickness, by ice making unit (12), ice sheet is removed, flake ice falls into ice bank (1) and stores, ice making unit (12), ice making evaporator (2), water pump P 2 consists of ice making unit refrigerant circulation loop, along with ice-making process constantly carries out, in ice bank (1), liquid level constantly descends, when dropping to the bottom limit level place, by the fluid level control device control that links, make valve V13, V18 and water pump P 2, P7 closes, while Open valve V16, replenish again the required cold water of ice making from water storage pool (4), operation so repeatedly, until reach required ice-making capacity.
8. method according to claim 5, is characterized in that, cold-storage limit, limit cooling pattern comprises following six kinds of operating modes:
the first cold-storage limit, refrigeration unit limit cooling operating mode: Open valve V2, V5, V6, V9, V11 and water pump P 4, P5, P6, P7, other valve and water pump are all closed, the cold water that makes from the first refrigeration unit (8) enters water storage pool (4) cold-storage through a valve V9 part, a part enters plate type heat exchanger (13) through valve V6 and lets cool to user's side, high-temperature water after water storage pool (4) top high-temperature water and plate type heat exchanger (13) heat exchange converges through water pump P 4 effects, enter the first refrigeration unit (8) through valve V2 cooled, air conditioning water enters plate type heat exchanger (13) and lets cool the water heat exchange from water collector (7), after heat exchange, cryogenic freezing water enters water knockout drum (11) for user's refrigeration, cold-storage, the amount of letting cool is by variable frequency pump P5, P6 controls according to temperature,
the first cold-storage limit, refrigeration unit limit cooling operating mode: Open valve V3, V5, V6, V10, V12 and water pump P 4, P5, P6, P7, other valve and water pump are all closed, the cold water that makes from the second refrigeration unit (9) enters water storage pool (4) cold-storage through a valve V10 part, a part enters plate type heat exchanger (13) through valve V6 and lets cool to user's side, high-temperature water after water storage pool (4) top high-temperature water and plate type heat exchanger (13) heat exchange converges through water pump P 4 effects, enter the second refrigeration unit (9) through valve V3 cooled, air conditioning water enters plate type heat exchanger (13) and lets cool the water heat exchange from water collector (7), after heat exchange, cryogenic freezing water enters water knockout drum (11) for user's refrigeration, cold-storage, the amount of letting cool is by variable frequency pump P5, P6 controls according to temperature,
First refrigeration unit water cold-storage the second refrigeration unit cooling operating mode: Open valve V2, V4, V8, V9, V11, V12 and water pump P 3, P4, P7, other valve and water pump are all closed, and its method of operation is the in parallel of two kinds of methods of operation of the first refrigeration unit water cold-storage and the second direct cooling of refrigeration unit;
Second refrigeration unit water cold-storage the first refrigeration unit cooling operating mode: Open valve V1, V3, V7, V10, V11, V12 and water pump P 3, P4, P7, other valve and water pump are all closed, and its method of operation is the in parallel of two kinds of methods of operation of aforementioned the second refrigeration unit water cold-storage and the first direct cooling of refrigeration unit;
First cold-storage limit, refrigeration unit limit cooling the second refrigeration unit cooling operating mode: Open valve V2, V4, V5, V6, V8, V9, V11, V12 and water pump P 3, P4, P5, P6, P7, other valve and water pump are all closed, and this method of operation is the in parallel of two kinds of methods of operation of the first cold-storage limit, refrigeration unit limit cooling and the second direct cooling of refrigeration unit;
Second cold-storage limit, refrigeration unit limit cooling the first refrigeration unit cooling operating mode: Open valve V1, V3, V5, V6, V7, V10, V11, V12 and water pump P 3, P4, P5, P6, P7, other valve and water pump are all closed, and its method of operation is the in parallel of two kinds of methods of operation of the second cold-storage limit, refrigeration unit limit cooling and the first direct cooling of refrigeration unit.
9. method according to claim 5, is characterized in that, the described single pattern that lets cool comprises following two kinds of operating modes:
Water storage pool discharging: Open valve V5, V6 and water pump P 5, P6, other valve and water pump are all closed, cold-storage water enters plate type heat exchanger (13) from water storage pool (4) lower water-dispensing device (6) through valve V6 and lets cool to user's side, let cool by valve V5 and return to water storage pool (4) from upper water distributor (5), simultaneously, air conditioning water enters plate type heat exchanger (13) and lets cool the water heat exchange from water collector (7), after heat exchange, cryogenic freezing water enters water knockout drum (11) for user's refrigeration, lets cool water and chilled-water flow and is controlled by variable frequency pump P5, P6 respectively;
sliding type flake ice discharging: after water storage pool lets cool end, first Open valve V15, V16 and water pump P 1, other valve and water pump are all closed, high-temperature water after letting cool in this moment water storage pool (4) is from the effect through water pump P 1 of the lower water-dispensing device (6) of water storage pool (4) bottom, through valve V16, V15 introduces ice bank (1) through ice making evaporator (2) from water-locator (3), after arriving certain liquid level, by the fluid level control device control that links, valve-off V15, V16 and water pump P 1, while Open valve V14, V17, V18 and water pump P 5, P6, beginning sliding type flake ice lets cool, entered just that in ice bank (1), a certain amount of high-temperature water melts a part fast with the flake ice that stores, low temperature ice-melt water is through water pump P 5 effects, through valve V18, V17 enters plate type heat exchanger (13) and lets cool to user's side, high-temperature molten frozen water after letting cool is through valve V14, water-locator (3) and ice making evaporator (2) return and continue ice-melt in ice bank (1), simultaneously, air conditioning water enters plate type heat exchanger (13) and the heat exchange of low temperature ice-melt water from water collector (7), after heat exchange, cryogenic freezing water enters water knockout drum (11) for user's refrigeration, low temperature ice-melt water and chilled-water flow are respectively by variable frequency pump P5, P6 controls.
10. method according to claim 5, is characterized in that, described the cooling pattern comprises following six kinds of operating modes while letting cool:
Water storage pool lets cool the first refrigeration unit cooling operating mode: Open valve V1, V5, V6, V7, V11 and water pump P 3, P5, P6, P7, other valve and water pump are all closed, and its method of operation is that water storage pool lets cool in parallel with two kinds of methods of operation of the first direct cooling of refrigeration unit;
Water storage pool lets cool the second refrigeration unit cooling operating mode: Open valve V4, V5, V6, V8, V12 and water pump P 3, P5, P6, P7, other valve and water pump are all closed, and this method of operation is that water storage pool lets cool in parallel with two kinds of methods of operation of the second direct cooling of refrigeration unit;
Water storage pool lets cool first, second refrigeration unit cooling operating mode simultaneously: Open valve V1, V4, V5, V6, V7, V8, V11, V12 and water pump P 3, P5, P6, P7, other valve and water pump are all closed, and its method of operation is that water storage pool lets cool and first, second refrigeration unit direct two kinds of methods of operation of cooling in parallel simultaneously;
The sliding type flake ice lets cool the first refrigeration unit cooling operating mode: Open valve V1, V7, V11, V14, V17, V18 and water pump P 3, P5, P6, P7, other valve and water pump are all closed, and its method of operation is that the sliding type flake ice lets cool in parallel with two kinds of methods of operation of the first direct cooling of refrigeration unit;
The sliding type flake ice lets cool the second refrigeration unit cooling operating mode: Open valve V4, V8, V12, V14, V17, V18 and water pump P 3, P5, P6, P7, other valve and water pump are all closed, and its method of operation is that the sliding type flake ice lets cool in parallel with two kinds of methods of operation of the second direct cooling of refrigeration unit;
the sliding type flake ice lets cool first, the second refrigeration unit is the cooling operating mode simultaneously: Open valve V1, V4, V7, V8, V11, V12, V14, V17, V18 and water pump P 3, P5, P6, P7, other valve and water pump are all closed, this method of operation is that the sliding type flake ice lets cool and first, the second refrigeration unit is the directly parallel connection of two kinds of methods of operation of cooling simultaneously, after the sliding type flake ice lets cool and finishes fully, Open valve V5, V17, V18 and water pump P 5, other valve and water pump are all closed, all ice-melt water is through the effect of water pump P 5, through valve V18, V17, V5 turns back to water storage pool (4) from water storage pool (4) upper water distributor (5).
CN201310109314.0A 2013-03-29 2013-03-29 Water cold storage and ice conserve cold tandem center air-conditioning system and operation method thereof CN103162364B (en)

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