CN218772831U - Chilled water storage refrigerating system for data center - Google Patents

Abstract

The utility model discloses a water cold accumulation refrigerating system for a data center, which comprises a refrigerating unit, a central air conditioning system, a water return pipe and a cold accumulation water pool; the refrigerating unit comprises a water replenishing tank and a dual-working-condition unit; the water replenishing pool is respectively connected with the double-working-condition units; the double-working-condition unit can respectively supply cold to the central air-conditioning system and the cold storage water tank; the water outlet end of the cold accumulation water tank is connected with the water inlet end of the central air conditioner through a third control valve V; the water return end of the central air-conditioning system is connected with the first water inlet end of the water return pipe; the water outlet end of the water return pipe is connected with the second water inlet end of the double-working-condition unit; the cold storage water tank can be switched to a cold storage mode or a cold supply mode through the first control valve V, the second regulating valve V and the third control valve V. The water cold-storage refrigerating system can guarantee to provide a cold source for the data center, can let each duplex condition unit stop refrigeration again, reduces the power consumption of each duplex condition unit when the peak period on daytime to the refrigerated power consumption cost of data center has been reduced.

Description

Chilled water storage refrigerating system for data center

Technical Field

The utility model relates to a refrigeration technology field especially relates to a water cold-storage refrigerating system for data center.

Background

IT equipment in a data center is installed in a cabinet, and in a room where the cabinet is installed, the floor area of each cabinet is about 2.5-3 square meters on average. At present, the heat productivity of the IT equipment of each cabinet in most data centers exceeds W, once the air conditioning system stops operating, the temperature in a room exceeds 35 ℃ in a few minutes, the local temperature may exceed 40 ℃, the IT equipment generally goes down when the environmental temperature exceeds 40 ℃, and therefore the refrigeration cooling system in the data center needs to work continuously, so that a cold source is provided for the IT equipment in the data center, and the IT equipment is enabled to dissipate heat.

However, the continuous operation of the refrigeration system in the data center results in a huge power consumption of the data center, and according to the latest statistics, the power consumption proportion of the refrigeration system in the whole data center reaches about 45%, so that the refrigeration cost of the data center is high.

SUMMERY OF THE UTILITY MODEL

Problem to the background art provides, the utility model aims to provide a water cold-storage refrigerating system for data center has solved the problem that data center refrigeration is with high costs.

To achieve the purpose, the utility model adopts the following technical proposal:

a chilled water storage refrigeration system for a data center comprises a refrigeration unit, a central air-conditioning system, a water return pipe and a chilled water storage tank; the refrigerating unit comprises a water supplementing tank and a plurality of double-working-condition units; the water supplementing pool is respectively connected with the first water inlet end and the first water outlet end of the plurality of double-working-condition units through a circulating pipeline assembly, so that a circulating water return channel is formed between the water supplementing pool and the plurality of double-working-condition units; a first control valve V is arranged at a second water outlet end of the double-working-condition unit; a second regulating valve V is arranged at the water inlet end of the cold accumulation water tank and is connected with the water inlet end of the central air-conditioning system in parallel through a pipeline; a second water outlet end of the double-working-condition unit is respectively communicated with a water inlet end of the central air-conditioning system and the second regulating valve V through the first control valve V, so that the double-working-condition unit can respectively supply cold to the central air-conditioning system and the cold storage water tank; the water outlet end of the cold accumulation water tank is connected with the water inlet end of the central air conditioner through a third control valve V; the water return end of the central air-conditioning system is connected with the first water inlet end of the water return pipe; the water outlet end of the water return pipe is connected with the second water inlet end of the dual-working-condition unit; the cold storage water tank can be switched to a cold storage mode or a cold supply mode through the first control valve V, the second regulating valve V and the third control valve V.

Still further, a plate heat exchanger is also included; the water outlet end of the water return pipe is also provided with a fourth control valve V, and the fourth control valve V is connected with the second water inlet end of the double-working-condition unit in parallel through a pipeline; the water outlet end of the water return pipe is connected with the first water inlet end of the plate heat exchanger through a fourth control valve V; one end of the second regulating valve V is connected with a second water outlet end of the double-working-condition unit, and the other end of the second regulating valve V is connected with a first water inlet end of the plate heat exchanger; the first water outlet end of the plate heat exchanger is communicated with the water inlet end of the central air-conditioning system and the second water inlet end of the water return pipe through the third control valve V and the fifth control valve V respectively; the third control valve V and the fifth control valve V are arranged in parallel through a pipeline; the water outlet end of the cold accumulation water tank is connected with the second water inlet end of the plate type heat exchanger; and the water return end of the cold accumulation water tank is connected with the second water outlet end of the plate heat exchanger.

Furthermore, a control valve assembly is arranged between the plate heat exchanger and the cold accumulation water pool; the control valve assembly comprises a sixth control valve V, a seventh control valve V, an eighth control valve V and a ninth control valve V; the cold accumulation water tank is provided with a high water level interface and a low water level interface; the sixth control valve V and the eighth control valve V are connected with a second water outlet end of the plate heat exchanger in a pipeline parallel mode, so that the second water outlet end of the plate heat exchanger is connected with the low water level interface or the high water level interface; the seventh control valve V and the ninth control valve V are connected with a second water inlet end of the plate heat exchanger in a pipeline parallel mode, so that the second water inlet end of the plate heat exchanger is connected with the high water level interface or the low water level interface; when the cold accumulation water tank is in a cold accumulation mode, a second water outlet end of the plate type heat exchanger is communicated with the low water level interface through the sixth control valve V, a second water inlet end of the plate type heat exchanger is communicated with the high water level interface through the seventh control valve V, and the eighth control valve V and the ninth control valve V are both in a closed state; when the cold accumulation water tank is in a cold supply mode, the second water outlet end of the plate heat exchanger is communicated with the high water level interface through the eighth control valve V, the second water inlet end of the plate heat exchanger is communicated with the low water level interface through the ninth control valve V, and the sixth control valve V and the seventh control valve V are both in a closed state.

Preferably, a cold pump is arranged at the second water inlet end of the plate heat exchanger; the seventh control valve V or the ninth control valve V is preferably connected with a second water inlet end of the plate heat exchanger through the refrigeration pump, and the water return pipe is an annular water supply pipe; and a third water inlet of the water return pipe is connected with the water supplementing pool.

Furthermore, the system also comprises a backup refrigerating unit; the first water inlet end of the backup refrigerating unit is connected with the water outlet of the water supplementing pool; the first water outlet end of the backup refrigerating unit is connected with the water inlet of the water replenishing pool, so that the first water inlet end and the first water outlet end of the backup refrigerating unit and the water replenishing pool form a circulating water path; a second water outlet end of the backup refrigerating unit is connected with a first water inlet end of the plate heat exchanger through a tenth control valve V; a second water inlet end of the backup refrigerating unit is communicated with a second water outlet end of the plate heat exchanger through an eleventh control valve V; the tenth control valve V, the second regulating valve V and the fourth control valve V are arranged in parallel through pipelines; the eleventh control valve V, the third control valve V and the fifth control valve V are arranged in parallel through pipelines; when the backup refrigeration unit is closed, the tenth control valve V and the eleventh control valve V are both in a closed state, a first water inlet end of the plate heat exchanger is connected with the second regulating valve V or the fourth control valve V, and a first water outlet end of the plate heat exchanger is connected with the third control valve V or the fifth control valve V; when the backup refrigeration unit works, the tenth control valve V and the eleventh control valve V are both in an open state, and the second regulating valve V, the fourth control valve V, the third control valve V and the fifth control valve V are all in a closed state.

Specifically, the circulating pipeline assembly comprises a water inlet pipe and a water return pipe; the water outlet of the water supplementing pool is connected with the first water inlet end of the double-working-condition unit through the water inlet pipe; and the water inlet of the water supplementing tank is connected with the second water outlet end of the double-working-condition unit through the water return pipe.

Compared with the prior art, one of the technical schemes has the following beneficial effects:

the water cold-storage refrigerating system can guarantee that the data center provides a cold source and can also let each the dual-working-condition unit stops refrigerating, reduces the power consumption of each dual-working-condition unit during the daytime peak period, and therefore reduces the power consumption cost of data center refrigeration.

Preferably, the water supplementing pool and each are provided with a circulating water path between the double-working-condition units, and the water return pipe is arranged, so that the water path circulation of the refrigeration system can be realized, the waste of water resources is reduced, and the effect of saving resources is achieved.

Drawings

Fig. 1 is a schematic structural diagram of a chilled water storage refrigeration system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of the connection between the dual-operating mode unit, the central air conditioning system, the plate heat exchanger plate and the water return pipe according to an embodiment of the present invention;

fig. 3 is a schematic view of the connection between the plate heat exchanger and the cold-storage water pool according to an embodiment of the present invention;

fig. 4 is a schematic diagram of the connection between the backup refrigeration unit and the water replenishment tank according to an embodiment of the present invention;

fig. 5 is a schematic diagram of the chilled water storage refrigeration system according to an embodiment of the present invention in a dual-mode unit direct supply mode;

fig. 6 is a schematic diagram of a dual-operating mode unit storage-while-supply mode of the chilled water storage refrigeration system according to an embodiment of the present invention;

fig. 7 is a schematic diagram of the cold storage water pool independent cold supply mode of the chilled water storage refrigeration system according to an embodiment of the present invention;

fig. 8 is a schematic view of a combined cooling mode of a dual-working-condition unit cold storage water tank of the chilled water storage refrigeration system according to an embodiment of the present invention;

fig. 9 is a schematic diagram of the chilled water storage refrigeration system in the cold storage pool independent cold storage mode according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of technical features being indicated. Thus, features defined as "first", "second" and "third" may explicitly or implicitly include one or more of the features.

In a preferred embodiment of the present application, as shown in fig. 1 to 9, a chilled water storage refrigeration system for a data center includes a refrigeration unit, a central air conditioning system 3, a water return pipe 4 and a chilled water storage tank 5; the refrigerating unit comprises a water supplementing tank 1 and a plurality of double-working-condition units 2; the water supplementing pool 1 is respectively connected with the first water inlet end and the first water outlet end of the double-working-condition units 2 through a circulating pipeline assembly 10, so that a circulating water return channel is formed between the water supplementing pool 1 and the double-working-condition units 2; a first control valve V1 is arranged at a second water outlet end of the double-working-condition unit 2; a second regulating valve V2 is arranged at the water inlet end of the cold accumulation water tank 5, and the second regulating valve V2 is connected with the water inlet end of the central air-conditioning system 3 in parallel through a pipeline; the second water outlet end of the dual-working-condition unit 2 is respectively communicated with the water inlet end of the central air-conditioning system 3 and the second regulating valve V2 through the first control valve V1, so that the dual-working-condition unit 2 can respectively supply cold to the central air-conditioning system 3 and the cold storage water tank 5; the water outlet end of the cold accumulation water tank 5 is connected with the water inlet end of the central air conditioner through a third control valve V3; the water return end of the central air-conditioning system 3 is connected with the first water inlet end of the water return pipe 4; the water outlet end of the water return pipe 4 is connected with the second water inlet end of the dual-working-condition unit 2; the cold storage water tank 5 can be switched to a cold storage mode or a cold supply mode by the first control valve V1, the second regulating valve V2, and the third control valve V3.

In this embodiment, as shown in fig. 1, water in the makeup water tank 1 flows into each of the dual-condition units 2 to perform refrigeration, so that each of the dual-condition units 2 performs refrigeration to obtain a cold source required by data center refrigeration; and get into each the water of duplex condition unit 2 refrigerates the back, by each duplex condition unit 2 returns to moisturizing pond 1 makes each duplex condition unit 2 with moisturizing pond 1 constitutes the circulation water route to make full use of water resource reaches resources are saved's effect. Further, the first control valve V1 is opened, so that the cold source in the dual-working-condition unit 2 is conveyed to the conveying central air conditioning system 3 through a pipeline, and then is conveyed to each cabinet chamber of the data center through the central air conditioning system 3 to dissipate heat for the cabinets, and normal operation of the cabinets is guaranteed. And the cooling water entering the central air-conditioning system 3 exchanges heat with the inside of the central air-conditioning system 3, is discharged back to the water return pipe 4, and then flows back to the dual-working-condition unit 2 through the water return pipe 4 to continue refrigeration, so that water circulation is realized, and the effect of saving resources is achieved. Preferably, because the government has implemented a policy of different electricity rates during peak-valley periods of power supply in order to balance the load of the urban power grid, the electricity rate during the low-valley period at night is much lower than the electricity rate during the peak period during the day. Therefore, when entering the electricity consumption valley period at night, the second regulating valve V2 is opened, so that part of cold sources produced by the double-working-condition units 2 are discharged into the central air conditioning system 3, and the cold sources are discharged into the cold storage water pool 5 for cold storage outside the cold supply of the data center, so that the cold storage water pool 5 enters a cold storage mode. When the peak period of the daytime electricity utilization is reached, the first control valve V1 and the second regulating valve V2 are closed, the refrigeration of the dual-working-condition unit 2 is stopped, the third control valve V3 is opened, the cold source stored in the cold storage water tank 5 at the night in the valley period is utilized, and the data center is cooled, so that the cold storage water tank 5 enters a cold supply mode. When the cold source of the cold storage water tank 5 is consumed up quickly, the dual-working-condition unit 2 and the first control valve V1 are recovered to work, and the interruption of the heat dissipation work of the data center is avoided, so that the continuous heat dissipation of the data center for the cabinet is ensured. By means of the arrangement, cold sources can be guaranteed to be provided for the data center, the double-working-condition units 2 can stop refrigerating, electricity consumption of the double-working-condition units 2 in the daytime peak period is reduced, and accordingly electricity consumption cost of refrigerating of the data center is reduced. Preferably, moisturizing pond 1 and each be equipped with the circulation water route between the duplex condition unit 2, and the setting of wet return 4 can make this refrigerating system realize the water route circulation, reduces the waste of water resource, reaches resources are saved's effect.

Still further, a plate heat exchanger 6 is included; a fourth control valve V4 is further arranged at the water outlet end of the water return pipe 4, and the fourth control valve V4 is connected with the second water inlet end of the dual-working-condition unit 2 in parallel through a pipeline; the water outlet end of the water return pipe 4 is connected with the first water inlet end 611 of the plate heat exchanger 6 through a fourth control valve V4; one end of the second regulating valve V2 is connected to the second water outlet end of the dual-operating-condition unit 2, and the other end of the second regulating valve V2 is connected to the first water inlet end 611 of the plate heat exchanger 6; the first water outlet end 61 of the plate heat exchanger 6 is communicated with the water inlet end of the central air-conditioning system and the second water inlet end of the water return pipe 4 through the third control valve V3 and the fifth control valve V5 respectively; the third control valve V3 and the fifth control valve V5 are arranged in parallel through a pipeline; the water outlet end of the cold accumulation water tank 5 is connected with the second water inlet end 62 of the plate heat exchanger 6; the water return end of the cold accumulation water tank 5 is connected with the second water outlet end 622 of the plate heat exchanger 6.

Because the cold-storage water tank 5 is arranged in the underground layer, the dual-working-condition unit 2, the water return pipe 4 and the central air-conditioning system 3 are all arranged in the data center, and the data center is generally a high-rise building, pressure difference exists between the cold-storage water tank 5 and the dual-working-condition unit 2, between the water return pipe 4 and the central air-conditioning system 3 due to height difference. Therefore, when the cold storage water tank 5 is directly connected with the water return pipe 4, the dual-operating-condition unit 2 and the central air conditioning system 3 through control valve pipelines, when the operation of a worker is wrong, water in the dual-operating-condition unit 2, the water return pipe 4 or the central air conditioning system 3 is directly discharged to the cold storage water tank 5, so that the data center lacks cooling water, the cooling work of the data center is directly influenced, and even the cooling work of the data center is stopped. In order to avoid the occurrence of the above situation, in this embodiment, the cold storage water tank 5 is heat-exchanged through the plate heat exchanger 6 with the water return pipe 4, the double-working-condition unit 2 and between the central air-conditioning system 3 through water flow, namely, water in the cold storage water tank 5 flows in from the water outlet end of the cold storage water tank 5 heat-exchanged by the plate heat exchanger 6, after the cold storage or cold supply process is completed, the second water outlet end 622 of the plate heat exchanger 6 flows back to the cold storage water tank 5, so that the cold storage water tank 5 forms an independent water path circulation, and the double-working-condition unit 2, the central air-conditioning system 3 and the water return pipe 4 are directly communicated with each other, so that the double-working-condition unit 2, the central air-conditioning system 3 and the water return pipe 4 directly discharge all water flows to the cold storage water tank 5, thereby avoiding the lack of cooling water in the data center and ensuring the continuous operation of the refrigeration of the data center.

Furthermore, a control valve assembly is arranged between the plate heat exchanger 6 and the cold accumulation water tank 5; the control valve assembly comprises a sixth control valve V6, a seventh control valve V7, an eighth control valve V8 and a ninth control valve V9; the cold accumulation water tank 5 is provided with a high water level interface 51 and a low water level interface 52; the sixth control valve V6 and the eighth control valve V8 are connected with the second water outlet end 622 of the plate heat exchanger 6 in a pipeline parallel manner, so that the second water outlet end 622 of the plate heat exchanger 6 is connected with the low water level interface 52 or the high water level interface 51; the seventh control valve V7 and the ninth control valve V9 are connected in parallel with the second water inlet 62 of the plate heat exchanger 6 by pipelines, so that the second water inlet 62 of the plate heat exchanger 6 is connected with the high water level interface 51 or the low water level interface 52; when the cold storage water tank 5 is in the cold storage mode, the second water outlet end 622 of the plate heat exchanger 6 is communicated with the low water level interface 52 through the sixth control valve V6, the second water inlet end 62 of the plate heat exchanger 6 is communicated with the high water level interface 51 through the seventh control valve V7, and the eighth control valve V8 and the ninth control valve V9 are both in a closed state; when the cold storage water tank 5 is in a cold supply mode, the second water outlet end 622 of the plate heat exchanger 6 is communicated with the high water level interface 51 through the eighth control valve V8, the second water inlet end 62 of the plate heat exchanger 6 is communicated with the low water level interface 52 through the ninth control valve V9, and the sixth control valve V6 and the seventh control valve V7 are both in a closed state.

Because the cold-storage water tank 5 has a certain height, the water in the cold-storage water tank 5, the water flows of different height layers, also have different temperatures, i.e. the temperature of the water flow at the high water level of the cold-storage water tank 5 is higher than the temperature of the water flow at the low water level of the cold-storage water tank 5. Therefore, when cold-storage pond 5 carries out the cold-storage, preferentially arrange into the rivers of high water level in the cold-storage pond 5 as the heat medium through high water level interface 51 in the plate heat exchanger 6, with follow the cold coal water that plate heat exchanger 6's first end 611 flows in carries out the heat transfer, obtains the rivers of lower temperature after the heat transfer, by again plate heat exchanger 6's second goes out water end 622 and arranges back to cold-storage pond 5's low water level interface 52 carries out the energy storage, and such setting can more rationally low utilization cold source, ensures that the temperature degree of water in the cold-storage pond 5 can refrigerate for data center. When the cold storage water tank 5 supplies cold for the central air conditioning system 3, in order to ensure that the cold energy of the water in the cold storage water tank 5 meets the requirement of refrigeration of the data center, the low-temperature water flow in the low water level of the cold storage water tank 5 is preferentially discharged; therefore, when the cold storage water tank 5 is in the cold supply mode, the cold storage water tank 5 discharges low-level water flow serving as a refrigerant into the plate heat exchanger 6 through the low-level connector 52, exchanges heat with the heat medium water flow flowing in from the first water inlet end 611 of the plate heat exchanger 6, and then flows back into the cold storage water tank 5 through the second water outlet end 622 of the plate heat exchanger 6. The arrangement can ensure that the cold source provided by the cold storage water tank 5 can meet the requirement of the cooling of the data center. Preferably, the sixth control valve V6, the seventh control valve V7, the eighth control valve V8 and the ninth control valve V9 are arranged to switch between them, so as to more conveniently control the switching connection between the second water inlet end 62 and the second water outlet end 622 of the plate heat exchanger 6 and the low water level interface 52 and the high water level interface 51 of the cold storage water tank 5, thereby avoiding the disorder of the water path between the cold storage water tanks 5 and ensuring the normal cold storage and cold supply of the cold storage water tank 5.

Preferably, the second water inlet end 62 of the plate heat exchanger 6 is provided with a cold release pump 7; the seventh control valve V7 or the ninth control valve V9 is connected with the second water inlet end 62 of the plate heat exchanger 6 through the cooling pump 7. Because the height difference exists between the cold accumulation water tank 5 and the plate type heat exchanger 6, in order to ensure that the water in the cold accumulation water tank 5 can smoothly flow into the plate type heat exchanger 6 for heat exchange, the cold discharge pump 7 is arranged, and the purpose is to pump the water in the cold accumulation water tank 5 to the plate type heat exchanger 6 for heat exchange, so that the normal operation of cold supply and cold accumulation of the cold accumulation water tank 5 is ensured.

More preferably, the water return pipe 4 is an annular water supply pipe; and a third water inlet 43 of the water return pipe 4 is connected with the water replenishing pool 1. In order to improve the cold accumulation efficiency and the cold supply efficiency, the refrigerating system is provided with at least two groups of the double-working-condition unit 2 and at least two plate heat exchangers 6, so that at least two pipelines with the same function can be arranged. In practical application, when the return pipe 4 of the annular water supply pipe is disconnected from a certain waterway or is blocked, the connection between the return pipe 4 and other waterways is not affected by the disconnected pipeline, so that the refrigeration system can continuously supply cold for the data center. Further, the water return pipe 4 is also to avoid that each pipeline that flows back into the water return pipe 4 goes wrong, leads to the water return pipe 4 not to have water available, has consequently set up the third inlet 43 and is connected with the moisturizing pond 1, as reserve water source, avoids the water return pipe 4 not to have the usable condition of water, thereby guarantees data center's cooling normal operating.

Further, a backup refrigerating unit 8 is also included; the first water inlet end of the backup refrigerating unit 8 is connected with the water outlet of the water supplementing pool 1; the first water outlet end of the backup refrigerating unit 8 is connected with the water inlet of the water replenishing pool 1, so that the first water inlet end and the first water outlet end of the backup refrigerating unit 8 and the water replenishing pool 1 form a circulating water path; the second water outlet end of the backup refrigeration unit 8 is connected with the first water inlet end 611 of the plate heat exchanger 6 through a tenth control valve V10; a second water inlet end of the backup refrigeration unit 8 is communicated with a second water outlet end 622 of the plate heat exchanger 6 through an eleventh control valve V11; the tenth control valve V10, the second regulating valve V2 and the fourth control valve V4 are arranged in parallel through pipelines; the eleventh control valve V11, the third control valve V3 and the fifth control valve V5 are arranged in parallel through pipelines; when the backup refrigeration unit 8 is closed, the tenth control valve V10 and the eleventh control valve V11 are both in a closed state, the first water inlet end 611 of the plate heat exchanger 6 is connected with the second regulating valve V2 or the fourth control valve V4, and the first water outlet end 61 of the plate heat exchanger 6 is connected with the third control valve V3 or the fifth control valve V5; when the backup refrigeration unit 8 works, the tenth control valve V10 and the eleventh control valve V11 are both in an open state, and the second regulating valve V2, the fourth control valve V4, the third control valve V3 and the fifth control valve V5 are all connected and are both in a closed state.

Because along with the development, the cabinets of the data center are more and more, and the number of consumed cold sources is more and more, when the refrigeration of the data center with high load is met at night in the valley period, the cold sources made by the double-working-condition units 2 are directly discharged into the central air conditioning system 3 for the refrigeration of the data center, and the second regulating valve V2 cannot be opened to supply the cold sources into the cold storage water tank 5 for cold storage. However, in order to ensure that the cold storage water tank 5 can store cold at night, a backup refrigeration unit 8 is provided, when the data center is under high load, the backup refrigeration unit 8 refrigerates at the valley period at night, and a cold source produced by the backup refrigeration unit 8 exchanges heat to the cold storage water tank 5 through the plate heat exchanger 6 to store energy. Such setting both can guarantee data center's refrigeration when data center high load, can be at night when the low ebb period again, for carrying out the cold-storage in the cold-storage pond 5 to reduce data center's refrigeration power consumption.

Specifically, the circulation line assembly 10 includes a water inlet pipe and a water return pipe 4; the water outlet of the water supplementing pool 1 is connected with the first water inlet end of the dual-working-condition unit 2 through the water inlet pipe; and the water inlet of the water supplementing tank 1 is connected with the second water outlet end of the double-working-condition unit 2 through the water return pipe 4.

A cooling method adopting the chilled water storage refrigeration system for the data center comprises at least one of the following five cooling operation modes: the cold storage water supply system comprises a direct supply mode of the double-working-condition unit 2, a simultaneous supply and storage mode of the double-working-condition unit 2, an independent cold supply mode of the cold storage water tank 5, a combined cold supply mode of the double-working-condition unit 2 and the cold storage water tank 5 and an independent cold storage mode of the cold storage water tank 5.

Further, when the chilled water storage refrigeration system is in the direct supply mode of the dual-operating-condition unit 2: the second double-working-condition unit 2, the first control valve V1, the central air-conditioning system 3 and the water return pipe 4 operate, and the second regulating valve V2, the third control valve V3, the fourth control valve V4, the fifth control valve V5, the sixth control valve V6, the seventh control valve V7, the eighth control valve V8, the ninth control valve V9, the plate heat exchanger 6 and the backup refrigerating unit 8 are all in a closed state;

when the chilled water storage refrigeration system is in the cold storage water tank 5 independent cold supply mode: the third control valve V3, the fourth control valve V4, the eighth control valve V8, the ninth control valve V9, the central air-conditioning system 3, the water return pipe 4, the heat-release pump 7 and the plate heat exchanger 6 are all in operation, and the dual-working-condition unit 2, the first control valve V1, the second regulating valve V2, the fifth control valve V5, the sixth control valve V6, the seventh control valve V7 and the backup refrigerating unit 8 are all in a closed state;

when the chilled water storage refrigeration system is in the double-working-condition unit 2 and the chilled water storage tank 5 combined cooling mode: the double-working-condition unit 2, the first control valve V1, the third control valve V3, the fourth control valve V4, the eighth control valve V8, the ninth control valve V9, the central air-conditioning system 3, the water return pipe 4, the cooling pump 7 and the plate heat exchanger 6 are all in operation, and the second regulating valve V2, the fifth control valve V5, the sixth control valve V6, the seventh control valve V7 and the backup refrigerating unit 8 are all in a closed state.

Further, when the chilled water storage refrigeration system is in the side-supply side-storage mode of the dual-working-condition unit 2: the double-working-condition unit 2, the first control valve V1, the second regulating valve V2, the fifth control valve V5, the sixth control valve V6, the seventh control valve V7, the central air-conditioning system 3, the water return pipe 4, the refrigeration pump 7 and the plate heat exchanger 6 are all in an operation mode, and the third control valve V3, the fourth control valve V4, the eighth control valve V8, the ninth control valve V9 and the backup refrigeration unit 8 are all in a closed state;

when the chilled water storage refrigeration system is in the cold storage pool 5 single cold storage mode: the double-working-condition unit 2, the first control valve V1, the sixth control valve V6, the seventh control valve V7, the central air-conditioning system 3, the water return pipe 4, the plate heat exchanger 6, the cold discharging pump 7 and the backup refrigerating unit 8 are all in an operating state, and the second regulating valve V2, the third control valve V3, the fourth control valve V4, the fifth control valve V5, the eighth control valve V8 and the ninth control valve V9 are all in a closed state.

Specifically, as shown in fig. 5, during daytime, when the cold source of the cold storage water tank 5 is used up, the refrigeration system enters the direct supply mode of the dual-condition unit 2, that is, the cold source of the dual-condition unit 2 is only transmitted to the central air conditioning system 3 after the first control valve V1 is opened, and the central air conditioning system 3 reasonably distributes the cold source in the data. And the water at the water return end of the central air-conditioning system 3 directly flows back to the dual-working-condition unit 2 for the next refrigeration through the water return pipe 4.

Further, as shown in fig. 6, the cold storage water tank 5 is in a separate cold supply mode, that is, after the cold storage water tank 5 is used for cold storage at the valley time at night, when the cold storage water tank enters the peak time in the daytime, in order to reduce the power consumption of the data center, the dual-operating-condition unit 2 stops working, as long as the cold storage water tank 5 is used for cooling the data center, the cold supply process is as follows: the cold-storage water tank 5 is connected with the second water inlet end 62 of the plate heat exchanger 6 through the ninth control valve V9, the water outlet end of the water return pipe 4 is connected with the first water inlet end 611 of the plate heat exchanger 6 through the fourth control valve V4, the water flowing into the plate heat exchanger 6 from the cold-storage water tank 5 is a refrigerant, the water flowing into the plate heat exchanger 6 from the water return pipe 4 is a heat medium, the water flowing out of the first water outlet end 61 of the plate heat exchanger 6 is changed into chilled water after heat exchange in the plate heat exchanger 6, and the chilled water is discharged into the central air conditioning system 3 through the third control valve V3 and used for data center refrigeration. And the water flow of the cold storage water tank 5 flowing into the plate heat exchanger 6 flows back to the high water level interface 51 of the cold storage water tank 5 under the diversion of the eighth control valve V8 after heat exchange.

Furthermore, as shown in fig. 7, when the cooling mode of the cold storage water tank 5 alone or the direct supply mode of the dual-operating unit 2 is switched, the situation that the refrigeration of the data center is interrupted due to the fact that the chilled water of the cold storage water tank 5 or the chilled water of the dual-operating unit 2 cannot be timely discharged to the central air conditioning system 3 is avoided, and therefore the dual-operating unit 2 and the cold storage water tank 5 are adopted in the combined cooling mode, so that the purpose is that when the cooling mode of the cold storage water tank 5 alone begins or the direct supply mode of the dual-operating unit 2 begins, because the water flow is not stable, the dual-operating unit 2 or the cold storage water tank 5 which is still in operation before is needed provides assistance for the water flow of the cooling mode of the cold storage water tank 5 alone or the water flow of the direct supply mode of the dual-operating unit 2, and the water flow temperature of the cold source provided for the central air conditioning system 3 is ensured, so as to ensure the normal refrigeration of the data center. And the double-working-condition unit 2 and the cold accumulation water tank 5 are combined to form a cold supply mode detailed water path as follows: the double-working-condition unit 2 discharges chilled water into the central air-conditioning system 3 through the first control valve V1; the cold storage water tank 5 discharges the chilled water into the plate heat exchanger 6 for heat exchange through the ninth control valve V9, and the water flow which obtains the cold energy of the cold storage water tank 5 flows out from the first water outlet end 61 of the plate heat exchanger 6 and then is discharged into the central air-conditioning system 3 through the third control valve V3 in the third direction. And the return water of the central air-conditioning system 3 flows back into the return pipe 4 from the first water inlet end of the second return pipe 4, then one part of the water in the return pipe 4 flows back into the dual-working-condition unit 2 for continuous refrigeration, and the other part of the water flows into the plate heat exchanger 6 through the fourth control valve V4 for heat exchange.

Furthermore, as shown in fig. 8, at the time of the low valley period at night and when the load of the data center is low, the dual-operating-condition unit 2 can store the cold source to the cold storage water pool 5 for use when the refrigeration of the data center is satisfied. The specific process is as follows: the cold source of the dual-working-condition unit 2 flows to the central air conditioning system 3 and the first water inlet end 611 of the plate heat exchanger 6 respectively under the action of the first control valve V1 and the second regulating valve V2; the chilled water flowing into the central air conditioning system 3 is used for refrigerating a data center, the chilled water flowing into the first water inlet end 611 of the plate heat exchanger 6 exchanges heat with water flowing into the second water inlet end 62 of the plate heat exchanger 6 from the high water level interface 51 of the cold storage water tank 5 through the seventh control valve V7, and the chilled water obtained after heat exchange of the plate heat exchanger 6 in the cold storage water tank 5 flows back to the cold storage water tank 5 through the sixth control valve V6 for cold storage. And the chilled water flowing into the plate heat exchanger 6 from the first water inlet end flows back to the water return pipe 4 through the fifth control valve V5 after heat exchange, and then flows back to the dual-working-condition unit 2 through the water return pipe 4 for next refrigeration.

Furthermore, as shown in fig. 9, when the load of the data center is large at night in the valley period, the data center adopts the cold storage water pool 5 independent cold storage mode, and in this mode, the dual-working-condition unit 2 directly supplies cold to ensure that enough cold source can be provided for refrigeration of the data center, and the backup refrigeration unit 8 also performs cold storage for the cold storage water pool 5. In the direct supply mode of the dual-working-condition unit 2, the backup refrigeration unit 8 also performs refrigeration, and is connected to the first water inlet end 611 of the plate heat exchanger 6 through the tenth control valve V10, so that chilled water flows into the plate heat exchanger 6 as a refrigerant, and the high water level interface 51 of the cold storage water tank 5 is connected to the second water inlet end 62 of the plate heat exchanger 6 through the seventh control valve V7, so that water flowing into the plate heat exchanger 6 from the cold storage water tank 5 as a heat medium exchanges heat with the refrigerant, and then flows back to the cold storage water tank 5 from the sixth control valve V6. After heat exchange, the chilled water entering the plate heat exchanger 6 from the backup refrigeration unit 8 flows out from the first water outlet end 61 of the plate heat exchanger 6, and flows back to the backup refrigeration unit 8 for continuous refrigeration under the action of the eleventh control valve V11.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims (7)

1. A chilled water storage refrigeration system for a data center is characterized by comprising a refrigeration unit, a central air-conditioning system, a water return pipe and a chilled water storage pool;

the refrigerating unit comprises a water replenishing pool and a plurality of double-working-condition units;

the water supplementing pool is respectively connected with the first water inlet end and the first water outlet end of the double-working-condition units through a circulating pipeline assembly, so that a circulating water return channel is formed between the water supplementing pool and the double-working-condition units;

a first control valve is arranged at a second water outlet end of the double-working-condition unit;

the water inlet end of the cold accumulation water tank is provided with a second regulating valve, and the second regulating valve and the water inlet end of the central air-conditioning system are arranged in parallel through a pipeline;

the second water outlet end of the double-working-condition unit is respectively communicated with the water inlet end of the central air-conditioning system and the second regulating valve through the first control valve, so that the double-working-condition unit can respectively supply cold to the central air-conditioning system and the cold storage water tank;

the water outlet end of the cold accumulation water tank is connected with the water inlet end of the central air conditioner through a third control valve;

the water return end of the central air-conditioning system is connected with the first water inlet end of the water return pipe;

the water outlet end of the water return pipe is connected with the second water inlet end of the dual-working-condition unit;

the cold storage water tank can be switched to a cold storage mode or a cold supply mode through the first control valve, the second regulating valve and the third control valve.

2. The chilled water storage refrigeration system for data centers as claimed in claim 1 further comprising a plate heat exchanger;

the water outlet end of the water return pipe is also provided with a fourth control valve, and the fourth control valve is connected with the second water inlet end of the double-working-condition unit in parallel through a pipeline;

the water outlet end of the water return pipe is connected with the first water inlet end of the plate heat exchanger through a fourth control valve;

one end of the second regulating valve is connected with a second water outlet end of the double-working-condition unit, and the other end of the second regulating valve is connected with a first water inlet end of the plate heat exchanger;

the first water outlet end of the plate heat exchanger is communicated with the water inlet end of the central air-conditioning system and the second water inlet end of the water return pipe through the third control valve and the fifth control valve respectively;

the third control valve and the fifth control valve are arranged in parallel through a pipeline;

the water outlet end of the cold accumulation water tank is connected with the second water inlet end of the plate type heat exchanger;

and the water return end of the cold accumulation water tank is connected with the second water outlet end of the plate heat exchanger.

3. The chilled water storage refrigeration system for data centers as set forth in claim 2 wherein a control valve assembly is disposed between said plate heat exchanger and said chilled water storage pool;

the control valve assembly comprises a sixth control valve, a seventh control valve, an eighth control valve and a ninth control valve;

the cold accumulation water tank is provided with a high water level interface and a low water level interface;

the sixth control valve and the eighth control valve are connected with a second water outlet end of the plate heat exchanger in a pipeline parallel mode, so that the second water outlet end of the plate heat exchanger is connected with the low water level interface or the high water level interface;

the seventh control valve and the ninth control valve are connected with the second water inlet end of the plate heat exchanger in a pipeline parallel mode, so that the second water inlet end of the plate heat exchanger is connected with the high water level interface or the low water level interface;

when the cold accumulation water tank is in a cold accumulation mode, a second water outlet end of the plate type heat exchanger is communicated with the low water level interface through the sixth control valve, a second water inlet end of the plate type heat exchanger is communicated with the high water level interface through the seventh control valve, and the eighth control valve and the ninth control valve are both in a closed state; when the cold accumulation water tank is in a cold supply mode, the second water outlet end of the plate heat exchanger is communicated with the high water level interface through the eighth control valve, the second water inlet end of the plate heat exchanger is communicated with the low water level interface through the ninth control valve, and the sixth control valve and the seventh control valve are both in a closed state.

4. The chilled water storage refrigeration system for data centers as claimed in claim 3, wherein the second water inlet end of the plate heat exchanger is provided with a cooling pump;

and the seventh control valve or the ninth control valve is connected with the second water inlet end of the plate heat exchanger through the refrigeration pump.

5. The chilled water storage refrigeration system for data centers as claimed in claim 1, wherein the water return pipe is an annular water supply pipe;

and a third water inlet of the water return pipe is connected with the water supplementing pool.

6. The chilled water storage refrigeration system for data centers as set forth in claim 2, further comprising a backup refrigeration unit;

the first water inlet end of the backup refrigerating unit is connected with the water outlet of the water supplementing pool;

the first water outlet end of the backup refrigerating unit is connected with the water inlet of the water replenishing pool, so that the first water inlet end and the first water outlet end of the backup refrigerating unit and the water replenishing pool form a circulating water path;

a second water outlet end of the backup refrigerating unit is connected with a first water inlet end of the plate heat exchanger through a tenth control valve;

a second water inlet end of the backup refrigerating unit is communicated with a second water outlet end of the plate heat exchanger through an eleventh control valve;

the tenth control valve, the second regulating valve and the fourth control valve are arranged in parallel through pipelines;

the eleventh control valve, the third control valve and the fifth control valve are arranged in parallel through pipelines;

when the backup refrigeration unit is closed, the tenth control valve and the eleventh control valve are both in a closed state, a first water inlet end of the plate heat exchanger is connected with the second regulating valve or the fourth control valve, and a first water outlet end of the plate heat exchanger is connected with the third control valve or the fifth control valve;

when the backup refrigeration unit works, the tenth control valve and the eleventh control valve are both in an open state, and the second regulating valve, the fourth control valve, the third control valve and the fifth control valve are all in a closed state.

7. The chilled water storage refrigeration system for data centers as set forth in claim 1, wherein the circulation line assembly includes a water inlet pipe and a water return pipe;

the water outlet of the water supplementing pool is connected with the first water inlet end of the double-working-condition unit through the water inlet pipe;

and the water inlet of the water supplementing tank is connected with the second water outlet end of the double-working-condition unit through the water return pipe.

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