CN103148554A - Water cold accumulating and ice crystal cold accumulating parallel central air conditioning system and running method thereof - Google Patents
Water cold accumulating and ice crystal cold accumulating parallel central air conditioning system and running method thereof Download PDFInfo
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Abstract
The invention discloses a water cold accumulating and ice crystal cold accumulating parallel central air conditioning system and a running method thereof. The system comprises a first refrigeration unit (7), a second refrigeration unit (8), an ice crystal making unit (11), a water segregator (10), a plurality of fan coils (9), a water collector (6), a cold accumulating water pond (3) and an ice crystal pond (1), wherein the first refrigeration unit (7), the second refrigeration unit (8) and the ice crystal making unit (11) are arranged in parallel; the water segregator (10) and the plurality of fan coils (9) are connected with a chilled water pipe; the water collector (6) is connected with the refrigeration units through a water return pipe; the cold accumulating water pond (3) is arranged in parallel with the first and second refrigeration units; the ice crystal pond (1) is arranged in parallel with the cold accumulating water pond; heat of cold accumulating water and an ice crystal solution is exchanged with heat of air conditioner chilled water through plate type heat exchangers (12, 13) respectively; and each connecting pipeline is connected with a water pump through an electric control valve. Due to the adoption of the water cold accumulating and ice crystal cold accumulating parallel central air conditioning system, full load running of a host machine in the air conditioning system can be ensured; and meanwhile, the load shifting of electric quantity is realized, and the use cost is reduced.
Description
Technical field
The present invention relates to refrigeration plant, relate in particular to a kind of water cold-storage and the parallel central air conditioner system of ice crystal cold-storage and operation method thereof.
Background technology
At present, China's central air conditioner system energy consumption accounts for 40%～60% of whole building energy consumption, constantly urgent along with global energy-saving and emission-reduction problem, the central air conditioner system effective use becomes the major measure that building energy conservation reduces discharging, the factor that affects central air conditioner system efficient is mainly that customer charge constantly changes, cause the variation of central air-conditioning unit load, and the central air conditioner system unit to move its efficient under full load situation be the highest.For this problem, " multitime water cold-storage type central air-conditioning system " of China Patent No. 200820091877.6 proposed a solution, but the mentioned central air conditioner system of above-mentioned patent is when only utilizing the fire cistern cold-storage of building self, can not guarantee that the paddy electricity price period at night is fully utilized to carry out cold-storage, the unemployed paddy electricity price period is huge waste.
Summary of the invention
The present invention proposes a kind of water cold-storage and the parallel central air conditioner system of ice crystal cold-storage and operation method thereof, and this system and method can make the central air conditioner system unit efficiently move and use the electric weight of peak load shifting, effectively saves the cost that air-conditioning uses.
Water cold-storage and the parallel central air conditioner system of ice crystal cold-storage that the present invention proposes comprise: the brilliant unit of the first refrigeration unit that is arranged in parallel, the second refrigeration unit and ice making; The water knockout drum that is connected with chilled water pipe, a plurality of fan coil and the water collector that is connected with refrigeration unit by return pipe; Also comprise water storage pool and an ice crystal pond that is arranged in parallel with water storage pool that is arranged in parallel with described first, second refrigeration unit, cold-storage water and ice crystal water solution carry out heat exchange by plate type heat exchanger and air conditioning water respectively, are connected with water pump by electric control valve between each connecting pipe.
The present invention also proposes the operation method of a kind of water cold-storage and the parallel central air conditioner system of ice crystal cold-storage, and described method is according to 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, let cool and the air conditioning pattern of main frame cooling.
Compared with prior art, water cold-storage and the parallel central air conditioner system of ice crystal cold-storage and operation method thereof that the present invention proposes, not only can guarantee the oepration at full load of central air-conditioning unit, 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 peak load shifting of power consumption, the double action of filling and leading up.
Description of drawings
Fig. 1 is system schematic of the present invention.
The specific embodiment
As shown in Figure 1, the water cold-storage that the present invention proposes and the parallel central air conditioner system of ice crystal cold-storage comprise the first and second refrigeration unit 7 of being arranged in parallel, 8 and ice making crystalline substance unit 11, the water knockout drum 10 that is connected with chilled water pipe, a plurality of fan coils 9 that are connected with water knockout drum and by the water collector 6 that return pipe is connected with refrigeration unit, the ice crystal pond 1 that comprises also that a water storage pool 3 that is arranged in parallel with described refrigeration unit and and water storage pool be arranged in parallel.Water storage pool 3 is generally the fire cistern of building, for open type, can be also enclosed, water storage pool is arranged upper water distributor 4 and lower water-dispensing device 5.Ice crystal pond 1 is sealed, the internal storage glycol water, top, ice crystal pond has a mechanical agitation bar 2 to be used for stirring the ice crystal of generation, make its noncondensing one-tenth water ice, cold-storage water and ice crystal water solution respectively by plate type heat exchanger 12,13 and air conditioning water carry out heat exchange, regulate by variable frequency pump P5, P4 respectively through the cold-storage water of plate type heat exchanger and the flow of ice crystal water solution, chilled-water flow is regulated by variable frequency pump P6.
Any one or two in first, second refrigeration unit 7,8 are for water storage pool 3 provides cold, and its import is provided with the water pump P 3 that overcomes refrigeration machine and water storage pool resistance.
In discharging cold course, first, second refrigeration unit 7,8 and plate type heat exchanger 12,13 be arranged in parallel, plate type heat exchanger 12,13 is also for being arranged in parallel.Cold water in air conditioning water and water storage pool 3 carries out heat exchange in plate type heat exchanger 12, carry out heat exchange with ice crystal water solution in ice crystal pond 1 in plate type heat exchanger 13.
The present invention has not only adopted water cold-storage mode, a cover ice crystal cold accumulation system in parallel on water cold-storage basis, daytime the customer charge demand hour, refrigeration unit load greater than customer charge, the redundance load is for the water cold-storage, when the customer charge demand is larger, the refrigeration unit load is less than customer charge, and insufficient section replenishes with cold-storage water or ice crystal cold-storage, and the water process of cool every day can be repeatedly, make unit all the time in lower operation at full capacity, thereby guarantee that unit efficiently moves.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, and 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, utilizes the paddy electricity price period at night very limited, can not be all with its utilization, and the ice crystal cold-storage belongs to the latent heat cold-storage, and storage density of cold is large, carries out cold and stores therefore increase the ice crystal cold accumulation system and then can take full advantage of the paddy electricity price period at night.Because ice crystal cold-storage unit efficiency is low than the conventional air-conditioning unit,, the ordinary telegram period electric at the peak moved uneconomical, therefore the ice crystal cold-storage is mainly used in the paddy electricity price period at night.Repeatedly water cold-storage and the parallel central air conditioner system of ice crystal cold-storage, 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 ice crystal cold accumulation system institute cold storage capacity, compare with single 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, and in the long term, because repeatedly water cold-storage and the parallel central air conditioner system of ice crystal cold-storage 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 the parallel central air conditioner system of ice crystal cold-storage 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, let cool and five kinds of operational modes such as air conditioning pattern of main frame cooling, 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 2, P7, other valve and water pump are all closed.Air conditioning water through water pump P 2 effects, enters first refrigeration unit (7) refrigeration through valve V1 from water collector (6), and after refrigeration, cryogenic freezing water enters water knockout drum (10) 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 2, P7, other valve and water pump are all closed.Air conditioning water through water pump P 2 effects, enters second refrigeration unit (8) refrigeration through valve V4 from water collector (6), and after refrigeration, cryogenic freezing water enters water knockout drum (10) 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 2, 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 3, P7, other valve and water pump are all closed.The high-temperature water on water storage pool (3) top acts on through water pump P 3 from upper water distributor (4), enter the first refrigeration unit (7) refrigeration through valve V2, after refrigeration, low-temperature cold water returns to water storage pool through valve V9 from the lower water-dispensing device (5) of water storage pool (3) bottom and carries out the water cold-storage.
The second refrigeration unit water charging: Open valve V3, V10, V12 and water pump P 3, P7, other valve and water pump are all closed.The high-temperature water on water storage pool (3) top acts on through water pump P 3 from upper water distributor (4), enter the second refrigeration unit (8) refrigeration through valve V3, after refrigeration, low-temperature cold water returns to water storage pool through valve V10 from the lower water-dispensing device (5) of water storage pool (3) bottom and carries out the water cold-storage.
The ice crystal charging: Open valve V13, V14 and water pump P 1, P7, other valve and water pump are all closed.The inner glycol water in ice crystal pond (1) acts on from the bottom through water pump P 1, enters the brilliant main frame of ice making (11) through valve V14 and produces ice crystal, and the ice crystal that makes returns from top, ice crystal pond (1) and carries out the ice crystal cold-storage.
(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, V17 and water pump P 3, P5, P6, P7, other valve and water pump are all closed.The cold water that makes from the first refrigeration unit (7) enters water storage pool (3) cold-storage through a valve V9 part, a part enters plate type heat exchanger A(12 through valve V6) let cool to user's side, water storage pool (3) top high-temperature water and plate type heat exchanger A(12) high-temperature water after heat exchange converges through water pump P 3 effects, enters the first refrigeration unit (7) through valve V2 cooled.Air conditioning water enters plate type heat exchanger A(12 from water collector (6) through valve V17) and let cool the water heat exchange, after heat exchange, cryogenic freezing water enters water knockout drum (10) 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, V17 and water pump P 3, P5, P6, P7, other valve and water pump are all closed.The cold water that makes from the second refrigeration unit (8) enters water storage pool (3) cold-storage through a valve V10 part, a part enters plate type heat exchanger A(12 through valve V6) let cool to user's side, water storage pool (3) top high-temperature water and plate type heat exchanger A(12) high-temperature water after heat exchange converges through water pump P 3 effects, enters the second refrigeration unit (8) through valve V3 cooled.Air conditioning water enters plate type heat exchanger A(12 from water collector (6) through valve V17) and let cool the water heat exchange, after heat exchange, cryogenic freezing water enters water knockout drum (10) 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 2, P3, 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 2, P3, 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, V17 and water pump P 2, P3, 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, V17 and water pump P 2, P3, 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, V17 and water pump P 5, P6, other valve and water pump are all closed.Cold-storage water enters plate type heat exchanger A(12 from water storage pool (3) lower water-dispensing device (5) through valve V6) let cool to user's side, let cool by valve V5 and return to water storage pool (3) from upper water distributor (4).Simultaneously, air conditioning water enters plate type heat exchanger A(12 from water collector (6) through valve V17) and let cool the water heat exchange, after heat exchange, cryogenic freezing water enters water knockout drum (10) for user's refrigeration, lets cool water and chilled-water flow and is controlled by variable frequency pump P5, P6 respectively.
Ice crystal pond discharging: Open valve V15, V16 and water pump P 4, P6, other valve and water pump are all closed.Ice crystal solution enters plate type heat exchanger B(13 from bottom, ice crystal pond (1) through valve V15) let cool to user's side, return from top, ice crystal pond (1) after letting cool.Simultaneously, air conditioning water enters plate type heat exchanger B(13 from water collector (6) through valve V16) and let cool the heat exchange of ice crystal solution, after heat exchange, cryogenic freezing water enters water knockout drum (10) for user's refrigeration, and ice crystal lets cool solution and chilled-water flow is controlled by variable frequency pump P5, P6 respectively.
Water storage pool ice crystal pond is discharging simultaneously: Open valve V5, V6, V15, V16, V17 and water pump P 4, P5, P6, other valve and water pump are all closed.Its method of operation is that aforementioned water storage pool lets cool with the ice crystal pond and lets cool the in parallel of two kinds of methods of operation.
(5) let cool and the air conditioning pattern of main frame cooling
Water storage pool lets cool the first refrigeration unit cooling operating mode: Open valve V1, V5, V6, V7, V11, V17 and water pump P 2, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that aforementioned 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, V17 and water pump P 2, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that aforementioned 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, V17 and water pump P 2, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that aforementioned water storage pool lets cool and first, second refrigeration unit direct two kinds of methods of operation of cooling in parallel simultaneously.
The ice crystal pond lets cool the first refrigeration unit cooling operating mode: Open valve V1, V7, V11, V15, V16 and water pump P 2, P4, P6, P7, other valve and water pump are all closed.Its method of operation is that aforementioned ice crystal pond lets cool in parallel with two kinds of methods of operation of the first direct cooling of refrigeration unit.
The ice crystal pond lets cool the second refrigeration unit cooling operating mode: Open valve V4, V8, V12, V15, V16 and water pump P 2, P4, P6, P7, other valve and water pump are all closed.Its method of operation is that aforementioned ice crystal pond lets cool in parallel with two kinds of methods of operation of the second direct cooling of refrigeration unit.
The ice crystal pond lets cool first, second refrigeration unit cooling operating mode simultaneously: Open valve V1, V4, V7, V8, V11, V12, V15, V16 and water pump P 2, P4, P6, P7, other valve and water pump are all closed.Its method of operation is that aforementioned ice crystal pond lets cool and first, second refrigeration unit direct two kinds of methods of operation of cooling in parallel simultaneously.
Water storage pool ice crystal pond lets cool the first refrigeration unit cooling operating mode simultaneously: Open valve V1, V5, V6, V7, V11, V15, V16, V17 and water pump P 2, P4, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that aforementioned water storage pool ice crystal pond lets cool in parallel with two kinds of methods of operation of the first direct cooling of refrigeration unit simultaneously.
Water storage pool ice crystal pond lets cool the second refrigeration unit cooling operating mode simultaneously: Open valve V4, V5, V6, V8, V12, V15, V16, V17 and water pump P 2, P4, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that aforementioned water storage pool ice crystal pond lets cool in parallel with two kinds of methods of operation of the second direct cooling of refrigeration unit simultaneously.
Water storage pool ice crystal pond lets cool first, second refrigeration unit cooling operating mode simultaneously simultaneously: Open valve V1, V4, V5, V6, V7, V8, V11, V12, V15, V16, V17 and water pump P 2, P4, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that aforementioned water storage pool ice crystal pond lets cool and first, second refrigeration unit direct two kinds of methods of operation of cooling in parallel simultaneously simultaneously.
Following table is five kinds of operational mode operation strategies.
Claims (10)
1. a water cold-storage and the parallel central air conditioner system of ice crystal cold-storage, is characterized in that: comprise the brilliant unit (11) of the first refrigeration unit (7), the second refrigeration unit (8) and the ice making that are arranged in parallel; The water knockout drum that is connected with chilled water pipe (10), a plurality of fan coil (9) and the water collector (6) that is connected with refrigeration unit by return pipe; Also comprise water storage pool (3) and an ice crystal pond (1) that is arranged in parallel with water storage pool that is arranged in parallel with described first, second refrigeration unit, cold-storage water and ice crystal water solution carry out heat exchange by plate type heat exchanger (12,13) and air conditioning water respectively, between each connecting pipe by electric control valve (V1 ?V17) be connected with water pump P1 ?P7) connection.
2. central air conditioner system according to claim 1 is characterized in that: closed system is adopted in described ice crystal pond (1), and its top is provided with a mechanical type puddler (2), is used for preventing that the ice crystal pond from forming large ice cube.
3. central air conditioner system according to claim 1 is characterized in that: described water storage pool (3) adopts open type or closed type structure, and inside is provided with upper water distributor (4) and lower water-dispensing device (5).
4. central air conditioner system according to claim 1 is characterized in that: described fan coil (9) adopts adverse current high-efficiency air-condition end system, and chilled water is 11 ℃/16 ℃ for, return water temperature.
5. the operation method of a water cold-storage and the parallel central air conditioner system of ice crystal cold-storage, it is characterized in that, described method is according to 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, let cool and the air conditioning pattern of main frame cooling.
6. operation method according to claim 5, is characterized in that, the direct cooling pattern of described refrigeration unit comprises following three kinds of operating modes:
The first direct cooling operating mode of refrigeration unit: Open valve V1, V7, V11 and water pump P 2, P7, other valve and water pump are all closed.Air conditioning water through water pump P 2 effects, enters first refrigeration unit (7) refrigeration through valve V1 from water collector (6), and after refrigeration, cryogenic freezing water enters water knockout drum (10) 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 2, P7, other valve and water pump are all closed.Air conditioning water through water pump P 2 effects, enters second refrigeration unit (8) refrigeration through valve V4 from water collector (6), and after refrigeration, cryogenic freezing water enters water knockout drum (10) 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 2, 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.
7. operation method according to claim 5, is characterized in that, described single cold-storage pattern comprises following three kinds of operating modes:
The first refrigeration unit water charging: Open valve V2, V9, V11 and water pump P 3, P7, other valve and water pump are all closed.The high-temperature water on water storage pool (3) top acts on through water pump P 3 from upper water distributor (4), enter the first refrigeration unit (7) refrigeration through valve V2, after refrigeration, low-temperature cold water returns to water storage pool through valve V9 from the lower water-dispensing device (5) of water storage pool (3) bottom and carries out the water cold-storage;
The second refrigeration unit water charging: Open valve V3, V10, V12 and water pump P 3, P7, other valve and water pump are all closed.The high-temperature water on water storage pool (3) top acts on through water pump P 3 from upper water distributor (4), enter the second refrigeration unit (8) refrigeration through valve V3, after refrigeration, low-temperature cold water returns to water storage pool through valve V10 from the lower water-dispensing device (5) of water storage pool (3) bottom and carries out the water cold-storage;
The ice crystal charging: Open valve V13, V14 and water pump P 1, P7, other valve and water pump are all closed.The inner glycol water in ice crystal pond (1) acts on from the bottom through water pump P 1, enters the brilliant main frame of ice making (11) through valve V14 and produces ice crystal, and the ice crystal that makes returns from top, ice crystal pond (1) and carries out the ice crystal cold-storage.
8. operation method according to claim 5, is characterized in that, cold-storage limit, described 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, V17 and water pump P 3, P5, P6, P7, other valve and water pump are all closed.The cold water that makes from the first refrigeration unit (7) enters water storage pool (3) cold-storage through a valve V9 part, a part enters plate type heat exchanger A(12 through valve V6) let cool to user's side, water storage pool (3) top high-temperature water and plate type heat exchanger A(12) high-temperature water after heat exchange converges through water pump P 3 effects, enters the first refrigeration unit (7) through valve V2 cooled.Air conditioning water enters plate type heat exchanger A(12 from water collector (6) through valve V17) and let cool the water heat exchange, after heat exchange, cryogenic freezing water enters water knockout drum (10) 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, V17 and water pump P 3, P5, P6, P7, other valve and water pump are all closed.The cold water that makes from the second refrigeration unit (8) enters water storage pool (3) cold-storage through a valve V10 part, a part enters plate type heat exchanger A(12 through valve V6) let cool to user's side, water storage pool (3) top high-temperature water and plate type heat exchanger A(12) high-temperature water after heat exchange converges through water pump P 3 effects, enters the second refrigeration unit (8) through valve V3 cooled.Air conditioning water enters plate type heat exchanger A(12 from water collector (6) through valve V17) and let cool the water heat exchange, after heat exchange, cryogenic freezing water enters water knockout drum (10) 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 2, P3, 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 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 2, P3, 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, V17 and water pump P 2, P3, P5, P6, P7, other valve and water pump are all closed, and 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, V17 and water pump P 2, P3, P5, P6, P7, other valve and water pump are all closed, and 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.
9. operation method according to claim 5, is characterized in that, the described single pattern that lets cool comprises following three kinds of operating modes:
water storage pool discharging: Open valve V5, V6, V17 and water pump P 5, P6, other valve and water pump are all closed, cold-storage water enters plate type heat exchanger A(12 from water storage pool (3) lower water-dispensing device (5) through valve V6) let cool to user's side, let cool by valve V5 and return to water storage pool (3) from upper water distributor (4), simultaneously, air conditioning water enters plate type heat exchanger A(12 from water collector (6) through valve V17) and let cool the water heat exchange, after heat exchange, cryogenic freezing water enters water knockout drum (10) for user's refrigeration, let cool water and chilled-water flow respectively by variable frequency pump P5, P6 controls,
Ice crystal pond discharging: Open valve V15, V16 and water pump P 4, P6, other valve and water pump are all closed, ice crystal solution enters plate type heat exchanger B(13 from bottom, ice crystal pond (1) through valve V15) let cool to user's side, return from top, ice crystal pond (1) after letting cool, simultaneously, air conditioning water enters plate type heat exchanger B(13 from water collector (6) through valve V16) and let cool the heat exchange of ice crystal solution, after heat exchange, cryogenic freezing water enters water knockout drum (10) for user's refrigeration, and ice crystal lets cool solution and chilled-water flow is controlled by variable frequency pump P5, P6 respectively;
Water storage pool ice crystal pond is discharging simultaneously: Open valve V5, V6, V15, V16, V17 and water pump P 4, P5, P6, and other valve and water pump are all closed, and its method of operation is that aforementioned water storage pool lets cool with the ice crystal pond and lets cool the in parallel of two kinds of methods of operation.
10. operation method according to claim 5 is characterized in that: described let cool and the air conditioning pattern of main frame cooling comprises following nine kinds of operating modes:
Water storage pool lets cool the first refrigeration unit cooling operating mode: Open valve V1, V5, V6, V7, V11, V17 and water pump P 2, P5, P6, P7, other valve and water pump are all closed, and its method of operation is that aforementioned 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, V17 and water pump P 2, P5, P6, P7, other valve and water pump are all closed, and its method of operation is that aforementioned 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, V17 and water pump P 2, P5, P6, P7, other valve and water pump are all closed.Its method of operation is that aforementioned water storage pool lets cool and first, second refrigeration unit direct two kinds of methods of operation of cooling in parallel simultaneously;
The ice crystal pond lets cool the first refrigeration unit cooling operating mode: Open valve V1, V7, V11, V15, V16 and water pump P 2, P4, P6, P7, other valve and water pump are all closed, and its method of operation is that aforementioned ice crystal pond lets cool in parallel with two kinds of methods of operation of the first direct cooling of refrigeration unit;
The ice crystal pond lets cool the second refrigeration unit cooling operating mode: Open valve V4, V8, V12, V15, V16 and water pump P 2, P4, P6, P7, other valve and water pump are all closed, and its method of operation is that aforementioned ice crystal pond lets cool in parallel with two kinds of methods of operation of the second direct cooling of refrigeration unit;
The ice crystal pond lets cool first, second refrigeration unit cooling operating mode simultaneously: Open valve V1, V4, V7, V8, V11, V12, V15, V16 and water pump P 2, P4, P6, P7, other valve and water pump are all closed, and its method of operation is that aforementioned ice crystal pond lets cool and first, second refrigeration unit direct two kinds of methods of operation of cooling in parallel simultaneously;
Water storage pool ice crystal pond lets cool the first refrigeration unit cooling operating mode simultaneously: Open valve V1, V5, V6, V7, V11, V15, V16, V17 and water pump P 2, P4, P5, P6, P7, other valve and water pump are all closed, and its method of operation is that aforementioned water storage pool ice crystal pond lets cool in parallel with two kinds of methods of operation of the first direct cooling of refrigeration unit simultaneously;
Water storage pool ice crystal pond lets cool the second refrigeration unit cooling operating mode simultaneously: Open valve V4, V5, V6, V8, V12, V15, V16, V17 and water pump P 2, P4, P5, P6, P7, other valve and water pump are all closed, and its method of operation is that aforementioned water storage pool ice crystal pond lets cool in parallel with two kinds of methods of operation of the second direct cooling of refrigeration unit simultaneously;
Water storage pool ice crystal pond lets cool first, second refrigeration unit cooling operating mode simultaneously simultaneously: Open valve V1, V4, V5, V6, V7, V8, V11, V12, V15, V16, V17 and water pump P 2, P4, P5, P6, P7, other valve and water pump are all closed, and its method of operation is that aforementioned water storage pool ice crystal pond lets cool and first, second refrigeration unit direct two kinds of methods of operation of cooling in parallel simultaneously simultaneously.
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| CN107062462A (en) * | 2017-01-03 | 2017-08-18 | 珠海格力电器股份有限公司 | A kind of control system of cold wind unit, cold wind unit and its control method |
| CN110173779A (en) * | 2019-05-29 | 2019-08-27 | 中国科学院广州能源研究所 | A kind of big temperature difference cold supply system of combined type and its control method |
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| CN110243035A (en) * | 2019-06-06 | 2019-09-17 | 深圳市云科设计咨询服务有限公司 | A kind of warm and humid sub-control air-conditioning system of the big temperature difference of multi-freezing pipe |
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| CN103148554B (en) | 2015-12-09 |
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