Data Center Distributed Cold Energy Storage System

Abstract

The present application discloses a distributed chilled water storage system for a data center, which includes a water supply pipe and a water return pipe connected to a load area. The water supply pipe and the water return pipe are arranged in a ring network structure. At least one branch main pipe is provided on the main pipe of the ring network structure. The system further includes: at least one set of chilled water storage systems, which are connected in parallel to the branch main pipe; each chilled water storage system includes a first chiller and at least one chilled water storage tank. When the number of the chilled water storage tanks is one, the chilled water storage tank and the first chiller form a refrigeration circuit; when the number of the chilled water storage tanks is at least two, the chilled water storage tanks are connected in parallel and then form a refrigeration circuit with the first chiller. The present application can provide low-temperature chilled water storage to increase the temperature difference margin, combined with distributed configuration, thereby reducing the volume of the chilled water storage tank, etc. It is applicable to the usage scenarios of primary pumps and secondary pumps in existing chilled water systems.

Description

Technical Field

[0001] This application belongs to the technical field of chilled water storage in data centers, and specifically relates to a distributed chilled water storage system for data centers. Background Art

[0002] In the large air-conditioning water system of a data center, in order to achieve high availability, it is necessary to realize the continuous refrigeration function of the refrigeration system, and the main measure adopted is the technical design of the chilled water storage system. In the Uptime requirements for Tier 4 data centers, the continuous refrigeration function is clearly required. For data centers that still need to ensure the normal cooling function of the air-conditioning system in the event of an unplanned power outage, setting up a chilled water storage system is currently a widely used technical option.

[0003] Since data centers pursue energy conservation, for the chilled water system, the supply and return water temperatures of the chilled water are often increased (for example, from the supply and return water temperatures of 7 / 12°C in commercial buildings to 18 / 24°C in supply and return water) to significantly improve the COP energy efficiency of the chiller, and at the same time, the opportunity to use natural cooling can be increased. However, after the chilled water temperature is increased, in order to ensure that the supply air temperature meets the requirements of the server equipment, the original supply air temperature margin of the air conditioner will be greatly compressed. Once the air-conditioning supply air temperature is too high and exceeds the requirement range of the server equipment, the risk of server equipment overheating and crashing will increase significantly. Moreover, in the existing chilled water storage system, the chilled water storage tanks are mostly installed in series or parallel on the main pipe of the chilled water station to supply chilled water storage for the entire chilled water system, which is a centralized deployment for cooling. However, the load increases gradually, and the existing design has a greater impact on the early construction difficulty, delivery time, and initial investment.

[0004] For the above reasons, the existing design of the chilled water storage system in data centers will result in a large volume of the chilled water storage tank and inflexible deployment. In addition, the existing design of the chilled water storage system also has the following situations: 1) The water temperature of the chilled water storage tank is the same as that of the main pipe; 2) There are various designs for the chilled water storage tank system, including primary pumps, secondary pumps, etc.

[0005] Therefore, how to solve the problems of large volume and flexible deployment of the chilled water storage tank and be compatible with the primary pumps and secondary pumps of the existing chilled water system is a technical problem that urgently needs to be solved. Summary of the Invention

[0006] Aiming at the above-mentioned disadvantages or deficiencies of the existing technology, the technical problem to be solved by this application is to provide a distributed chilled water storage system for data centers, which can provide low-temperature chilled water storage to increase the temperature difference margin, and combine with distributed configuration to reduce the volume of the chilled water storage tank, etc., and it is applicable to the usage scenarios of primary pumps and secondary pumps of the existing chilled water system.

[0007] To solve the above technical problems, this application is achieved through the following technical solutions:

[0008] The present application proposes a data center distributed chilled water storage system, including a water supply pipe and a water return pipe connected to a load area. The water supply pipe and the water return pipe are arranged according to a ring network structure. At least one branch main pipe is provided on the main pipe of the ring network structure.

[0009] It further includes: at least one chilled water storage system, and the chilled water storage systems are arranged in parallel on the branch main pipe.

[0010] The chilled water storage system includes a first chiller and at least one chilled water storage tank. When the number of installed chilled water storage tanks is one, the chilled water storage tank and the first chiller form a refrigeration circuit; when the number of installed chilled water storage tanks is at least two, the chilled water storage tanks are arranged in parallel and then form a refrigeration circuit with the first chiller.

[0011] Further, in the above-mentioned data center distributed chilled water storage system, when the first chiller is a water-cooled chiller, at least one of the chilled water storage tanks forms a refrigeration circuit with the first chiller.

[0012] Further, in the above-mentioned data center distributed chilled water storage system, the condensing side of the first chiller is connected to the branch main pipe.

[0013] Further, in the above-mentioned data center distributed chilled water storage system, the chilled water storage tank is further configured with a first pipeline and a second pipeline, and the first pipeline and the second pipeline are respectively connected to the branch main pipe in a communicating manner. Among them, the diameters of the first pipeline and the second pipeline are both smaller than the diameter of the branch main pipe.

[0014] Further, in the above-mentioned data center distributed chilled water storage system, a first valve is provided on the first pipeline, and a second valve is provided on the second pipeline.

[0015] Further, in the above-mentioned data center distributed chilled water storage system, first temperature sensors are respectively configured on both sides of the branch main pipe connected to the second pipeline in a communicating manner.

[0016] Further, in the above-mentioned data center distributed chilled water storage system, when the chilled water storage system is in the cold charging state, the first valve and the second valve are in the closed state; when the chilled water storage system is in the cold discharging state, the first valve and the second valve are opened, and the opening degree of the second valve is adjusted according to the first temperature sensor.

[0017] Further, in the above-mentioned data center distributed chilled water storage system, a third valve is provided on the first pipeline, a fourth valve is provided on the second pipeline, and a third pipeline is further connected between the first pipeline and the second pipeline, and a fifth valve is provided on the third pipeline.

[0018] Further, in the above data center distributed chilled water storage system, a second temperature sensor is further arranged on the second pipeline.

[0019] Further, in the above data center distributed chilled water storage system, when the chilled water storage system is in the cold charging state, the third valve, the fourth valve and the fifth valve are all in the closed state; when the chilled water storage system is in the cold discharging state, the third valve, the fourth valve and the fifth valve are opened, and the opening degrees of the third valve and the fifth valve are adjusted according to the second temperature sensor.

[0020] Further, in the above data center distributed chilled water storage system, a three-way valve is arranged on the first pipeline, a fourth pipeline is further connected between the first pipeline and the second pipeline through the three-way valve, and a sixth valve is further arranged on the second pipeline.

[0021] Further, in the above data center distributed chilled water storage system, a third temperature sensor is further arranged on the second pipeline.

[0022] Further, in the above data center distributed chilled water storage system, when the chilled water storage system is in the cold charging state, the main circuit of the three-way valve, the bypass circuit of the three-way valve and the sixth valve are all in the closed state; when the chilled water storage system is in the cold discharging state, the main circuit of the three-way valve, the bypass circuit of the three-way valve and the sixth valve are all in the open state, and the opening degrees of the main circuit of the three-way valve and the bypass circuit of the three-way valve are adjusted according to the third temperature sensor.

[0023] Further, in the above data center distributed chilled water storage system, when the first chiller is an air-cooled chiller, the air-cooled chiller and the chilled water storage tank form a refrigeration circuit; when the number of the chilled water storage tanks is multiple, the chilled water storage tanks are connected in parallel and then form a refrigeration circuit with the air-cooled chiller.

[0024] Compared with the prior art, the present application has the following technical effects:

[0025] The chilled water storage system in the present application is installed on the branch main pipe, and its deployment method is the same as that of the terminal air conditioner, which is connected in parallel on the branch main pipe. It can be installed according to the load partition and is designed distributively. The present application does not require additional design and transformation of the existing system and can be put into use in batches according to the load condition;

[0026] The present application utilizes the characteristic that the water temperature in the chilled water pipe of the main pipe is relatively high, and accesses the condensing side of the small-sized / small-capacity first chiller. The first chiller produces low-temperature chilled water as an independent refrigeration circuit of the chilled water storage tank; and because the refrigeration circuit of the chilled water storage tank is isolated from the refrigeration circuit of the refrigeration station, the capacity of this first chiller can be selected to be of a smaller capacity;

[0027] In this application, the capacity of the first chiller is small. In addition, due to the low water temperature after low-temperature cold energy storage, the pipe diameters of the first pipeline and the second pipeline of the cold energy storage tank in this application can be selected to be smaller; while in the prior art, the water temperature of the cold energy storage tank is the same as that of the main pipe, so the pipe diameters of the pipelines on the cold energy storage tank cannot be reduced.

[0028] In this application, the charging and discharging of cold energy are controlled by controlling the valves arranged on the first pipeline and the second pipeline; when the system is in the cold discharging state, the valve opening is adjusted according to the set value of the mixed water temperature. Description of the Drawings

[0029] Other features, objects, and advantages of this application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0030] Figure 1 : Structural schematic diagram of the first implementation mode of the distributed cold energy storage system in the data center of this application;

[0031] Figure 2 : As Figure 1 shown, it is the structural schematic diagram in the cold charging state;

[0032] Figure 3 : As Figure 1 shown, it is the structural schematic diagram in the cold discharging state;

[0033] Figure 4 : Partial structural schematic diagram of the second implementation mode of the distributed cold energy storage system in the data center of this application;

[0034] Figure 5 : Partial structural schematic diagram of the third implementation mode of the distributed cold energy storage system in the data center of this application;

[0035] Figure 6 : Structural schematic diagram of the fourth implementation mode of the distributed cold energy storage system in the data center of this application;

[0036] Figure 7 : Structural schematic diagram of the fifth implementation mode of the distributed cold energy storage system in the data center of this application;

[0037] Among them, 10 - the first chiller, 11 - the condenser, 12 - the evaporator, 20 - the cold energy storage tank, 30 - the air conditioner, 40 - the chiller refrigeration side, 50 - the water supply pipe, 60 - the return water pipe, 70 - the air-cooled chiller, V1 - the first valve, V2 - the second valve, V3 - the third valve, V4 - the fourth valve, V5 - the fifth valve, V6 - the sixth valve, S - the three-way valve, T1 - the first temperature sensor, T2 - the second temperature sensor, T3 - the third temperature sensor, M - the load area. Detailed Implementation Modes

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0039] Embodiment 1

[0040] As Figure 1 shown, in this embodiment, the data center distributed chilled water storage system includes a water supply pipe 50 and a return water pipe 60 connected to the load area M. The water supply pipe 50 and the return water pipe 60 are arranged according to a ring network structure. At least one branch main pipe is provided on the main pipe of the ring network structure.

[0041] It further includes: at least one chilled water storage system, and the chilled water storage systems are arranged in parallel on the branch main pipe.

[0042] The chilled water storage system includes a first chiller 10 and at least one chilled water storage tank 20. When the number of the chilled water storage tanks 20 is one, the chilled water storage tank 20 and the first chiller 10 form a refrigeration circuit; when the number of the chilled water storage tanks 20 is at least two, the chilled water storage tanks 20 are arranged in parallel and then form a refrigeration circuit with the first chiller 10.

[0043] Wherein, in this embodiment, the refrigeration circuit can be specifically realized in the following manner: the inlet and outlet water pipes of the condenser 11 of the first chiller 10 are connected in parallel with the first pipeline and the second pipeline of the chilled water storage tank 20 on the branch main pipe, and the evaporator 12 side of the first chiller 10 forms a series circuit with the water pump and the third pipeline on the chilled water storage tank 20.

[0044] In this embodiment, the first chiller 10 adopts a water-cooled chiller, which is convenient for flexible indoor deployment.

[0045] This embodiment only illustrates the case where two branch main pipes are provided in the above ring network structure. Among them, in the specific application process, three or even more branch main pipes are set according to the actual situation of the load area M. A plurality of air conditioners 30 (existing design) can be connected in parallel on each branch main pipe. On the basis of the existing design, at least one chilled water storage system is connected in parallel on each branch main pipe. The figure only illustrates the case where one chilled water storage system is provided on each branch main pipe. The above examples are only for illustration and do not limit the protection scope of the present application.

[0046] Furthermore, the condensation side of the first chiller 10 is connected to the branch main pipe, as shown in Figure 1As shown in the figure. In this embodiment, taking advantage of the relatively high water temperature in the chilled water pipe of the main pipe, the condensing side of the first chiller 10 is connected. At this time, the first chiller 10 produces low-temperature chilled water as an independent refrigeration circuit for the chilled water storage tank 20; and since the refrigeration circuit of the chilled water storage tank 20 is isolated from the refrigeration circuit of the chilled water station, the capacity of this first chiller 10 can be selected to be a relatively small capacity.

[0047] The chilled water storage tank 20 is further provided with a first pipeline and a second pipeline, and the first pipeline and the second pipeline are respectively communicated with the branch main pipe. Among them, the diameters of the first pipeline and the second pipeline are both smaller than the diameter of the branch main pipe. Due to the relatively small capacity or volume of the first chiller 10 above, and the low water temperature after low-temperature chilled water storage, the diameters of the first pipeline and the second pipeline of the chilled water storage tank 20 in this application can be selected to be smaller sizes, and this diameter setting is easy to control the water volume and the mixed water temperature, etc. In the existing chilled water storage system, the water temperature of the chilled water storage tank 20 is the same as that of the main pipe, so the diameters of the pipelines configured for the existing chilled water storage tank 20 usually cannot be set smaller.

[0048] Further, a first valve V1 is provided on the first pipeline, and a second valve V2 is provided on the second pipeline. The charging and discharging of cold can be controlled by controlling the first valve V1 and the second valve V2 above. When the system is in the cold discharging state, the opening degree of the second valve V2 is adjusted according to the set value of the mixed water temperature.

[0049] In order to control the mixed water temperature in a timely manner, in this embodiment, first temperature sensors T1 are respectively configured on both sides of the branch main pipe communicated with the second pipeline.

[0050] As Figure 2 As shown in the figure, when this embodiment is in the cold charging state, the first chiller 10 (water-cooled chiller) is in the operating mode. The condensing side (condenser 11 side) of the first chiller 10 intakes water from the water supply pipe 50 of the branch main pipe and discharges water from the water return pipe 60 of the branch main pipe. At the same time, the refrigerating side (evaporator 12 side) of the first chiller 10 is connected to the chilled water storage tank 20, and a refrigeration circuit is formed through the chilled water pump, and the chilled water is stored in the chilled water storage tank 20. At this time, the first valve V1 on the first pipeline and the second valve V2 on the second pipeline are in the closed state.

[0051] As Figure 3As shown, when this embodiment is in the cooling mode, since the first chiller 10 does not have sustainable power supply operation, such as UPS power supply. Therefore, after the mains power outage, both the first chiller 10 and the water pump are in a shutdown and non-operating state. At this time, the BA system of the refrigeration station will issue relevant control mode instructions to make the chilled water storage system in the cooling mode. Then, the first valve V1 and the second valve V2 on the cooling pipeline (the first pipeline and the second pipeline) will open, and the water in the second pipeline (the outlet pipe of the cooling pipeline) and the branch main pipe will be mixed. Among them, the first valve V1 will open 100%, and the second valve V2 will be adjusted according to the reading of the first temperature sensor T1 installed on the branch main pipe and the set value, for example, using the PID control method, so that the water temperature of the branch main pipe meets the set range. The above cooling mode can still provide normal cooling function for the air conditioning system in case of unplanned power loss.

[0052] Among them, when this embodiment completes the above charging and discharging cooling mode, the control of the above first valve V1 and second valve V2 needs to rely on the existing BA control system of the refrigeration station to perform relevant logic switching control. The specific control process is as follows:

[0053]

[0054] Embodiment 2

[0055] As Figure 4 shown, the difference between this embodiment and the above Embodiment 1 is that the valve setting and temperature sensor setting scheme on the above first pipeline and second pipeline are improved.

[0056] Specifically, a third valve V3 is provided on the first pipeline, a fourth valve V4 is provided on the second pipeline, and a third pipeline is also connected between the first pipeline and the second pipeline. A fifth valve V5 is provided on the third pipeline.

[0057] A second temperature sensor T2 is also arranged on the second pipeline.

[0058] In this embodiment, a mixing water design is carried out by setting the third valve V3 and the fifth valve V5. The water passing through the third pipeline is mixed with the water in the first half of the second pipeline and then converges to the second half of the second pipeline and then is connected to the branch main pipe. Compared with Embodiment 1, the above setting method only needs to set a second temperature sensor T2 in the second half of the second pipeline to monitor the temperature of the mixed water.

[0059] When this embodiment is in the cold charging state, the first chiller 10 (water-cooled chiller) is in the operating mode. The condensing side (condenser 11 side) of the first chiller 10 takes in water from the water supply pipe 50 of the branch main pipe and discharges water from the return water pipe 60 of the branch main pipe. At the same time, the refrigerating side (evaporator 12 side) of the first chiller 10 is connected to the cold storage tank 20 to form a refrigeration circuit through a refrigerating water pump, and the chilled water is stored in the cold storage tank 20. At this time, the above-mentioned third valve V3, fourth valve V4, and fifth valve V5 are all in the closed state, and the chilled water is stored in the cold storage tank 20.

[0060] When this embodiment is in the cold discharging state, since the first chiller 10 does not have sustainable power supply operation, after the power failure of the commercial power, both the first chiller 10 and the water pump are in the shutdown state and do not work. At this time, the BA system of the refrigeration station will send relevant control mode instructions to make the cold storage system in the cold discharging mode, and the third valve V3, fourth valve V4, and fifth valve V5 are in the open state, and the water in the second pipeline (the water discharged from the cold discharging pipeline) is mixed with the water in the branch main pipe; among them, the opening degrees of the third valve V3 and the fifth valve V5 can be adjusted according to the mixed water temperature monitored by the second temperature sensor T2, and the PID control method can be used to make the water temperature of the branch main pipe meet the set range. The above cold discharging mode can still provide normal cooling function for the air conditioning system in case of unplanned power failure.

[0061] The above-mentioned cold charging and discharging modes need to rely on the existing BA control system of the refrigeration station to perform relevant logic switching control, and the specific control process is as follows:

[0062]

[0063] For the same technical features of this embodiment and the above-mentioned Embodiment 1, see the description of Embodiment 1 and will not be repeated here.

[0064] Embodiment 3

[0065] As Figure 5 shown, the difference between this embodiment and the above-mentioned Embodiment 2 is that the above-mentioned third valve V3 and fourth valve V4 are replaced by a three-way valve S, so as to realize the connection setting of the first pipeline and the third pipeline.

[0066] Specifically, a three-way valve S is provided on the first pipeline, and a fourth pipeline is also connected between the first pipeline and the second pipeline through the three-way valve S, and a sixth valve V6 is also provided on the second pipeline.

[0067] A third temperature sensor T3 is also provided on the second pipeline.

[0068] In this embodiment, a three-way valve S is provided for the design of mixing water. The water flowing through the third pipeline is mixed with the water in the first half of the second pipeline and then converges to the second half of the second pipeline and is connected to the branch main pipeline. Since the above setting method is similar to that of Embodiment 2, similarly, in this embodiment, only a third temperature sensor T3 needs to be provided in the second half of the second pipeline to monitor the temperature of the mixed water.

[0069] When this embodiment is in the cold charging state, the first chiller 10 (water-cooled chiller) is in the operating mode. The condensing side (condenser 11 side) of the first chiller 10 takes in water from the water supply pipe 50 of the branch main pipeline and discharges water from the return water pipe 60 of the branch main pipeline. At the same time, the refrigerating side (evaporator 12 side) of the first chiller 10 is connected to the cold storage tank 20 to form a refrigeration circuit through a refrigeration water pump, and the chilled water is stored in the cold storage tank 20. At this time, the main circuit of the three-way valve S, the bypass circuit of the three-way valve (the side connected to the third pipeline), and the sixth valve V6 are all in the closed state, and the chilled water is stored in the cold storage tank 20.

[0070] When this embodiment is in the cold discharging state, since the first chiller 10 does not have sustainable power supply for operation, after the power failure of the commercial power, the first chiller 10 and the water pump are both in the shutdown state. At this time, the BA system of the refrigeration station will issue relevant control mode instructions to make the cold storage system in the cold discharging mode. The main circuit of the three-way valve S, the bypass circuit of the three-way valve S, and the sixth valve V6 are in the open state, and the water in the second pipeline (the water discharged from the cold discharging pipeline) and the branch main pipeline are mixed; among them, the opening degrees of the main circuit of the three-way valve S and the bypass circuit of the three-way valve S can be adjusted according to the temperature of the mixed water monitored by the third temperature sensor T3, and the PID control method can be used to make the water temperature of the branch main pipeline meet the set range. The above cold discharging mode can still provide normal cooling function for the air conditioning system in case of unplanned power failure.

[0071] For the above-mentioned cold charging and discharging modes, it is necessary to rely on the existing BA control system of the refrigeration station to perform relevant logic switching control. The specific control process is as follows:

[0072]

[0073] The same technical features of this embodiment as those of Embodiment 2 and Embodiment 1 are described above and will not be repeated here.

[0074] Embodiment 4

[0075] As Figure 6 shown, in this embodiment, the setting methods of the valves and temperature sensors shown in the above Embodiment 2 and Embodiment 3 are combined and used in one embodiment. Other technical features are as shown in Embodiment 1, Embodiment 2, and Embodiment 3, and will not be repeated here.

[0076] Further preferably, at least two other setting methods disclosed in the above-mentioned Embodiment 1, Embodiment 2 and Embodiment 3 can also be combined and used.

[0077] For example, the setting methods of the valve and the temperature sensor shown in Embodiment 1 and Embodiment 2 are combined and used in one embodiment. Among them, the above combination method can be set on the same branch main pipe or on different branch main pipes;

[0078] For example, the setting methods of the valve and the temperature sensor shown in Embodiment 1 and Embodiment 3 are combined and used in one embodiment. Among them, the above combination method can be set on the same branch main pipe or on different branch main pipes;

[0079] For another example, the setting methods of the valve and the temperature sensor shown in the above-mentioned Embodiment 1, Embodiment 2 and Embodiment 3 can also be combined and used in one embodiment. Among them, the above combination method can be set on the same branch main pipe or on different branch main pipes.

[0080] The above specific setting methods can be adaptively selected according to the actual working conditions. The setting methods are flexible and have strong practicability.

[0081] Embodiment 5

[0082] For example Figure 7 As shown, in this embodiment, the first chiller 10 uses an air-cooled chiller 70, which is suitable for outdoor deployment.

[0083] Specifically, when the first chiller 10 is an air-cooled chiller 70, the air-cooled chiller 70 and the cold storage tank 20 form a refrigeration circuit; when the number of the cold storage tanks 20 is multiple, the cold storage tanks 20 are connected in parallel and then form a refrigeration circuit with the air-cooled chiller 70.

[0084] Among them, the above refrigeration circuit can be realized in a series manner.

[0085] In this embodiment, for the first pipeline and the second pipeline on the cold storage tank 20, the setting methods of the valves and the temperature sensors on the involved first pipeline and second pipeline can refer to those shown in Embodiment 1, Embodiment 2, Embodiment 3 and Embodiment 4, and will not be elaborated here.

[0086] Among them, Figure 7 only an example of implementing the valve and the temperature sensor in the manner shown in Embodiment 1 is disclosed, which is only for illustration and does not limit the protection scope of the present application.

[0087] The cold storage system in this application is installed on the branch main pipe. Its deployment method is the same as that of the terminal air conditioner, which is connected in parallel to the branch main pipe. It can be installed according to the load partition for distributed design. This application does not require additional design and transformation of the existing system and can be put into operation in batches according to the load situation. This application utilizes the characteristic that the water temperature in the chilled water pipe of the main pipe is relatively high, and accesses the condensing side of a small / small-capacity first chiller. The first chiller produces low-temperature chilled water as an independent refrigeration circuit for the cold storage tank. And because the refrigeration circuit of the cold storage tank is isolated from the refrigeration circuit of the refrigeration station, the capacity of this first chiller can be selected to be a smaller capacity. The capacity of the first chiller in this application is small, and in addition, due to the low water temperature after low-temperature cold storage, the pipe diameters of the first pipe and the second pipe of the cold storage tank in this application can be selected to be smaller sizes. In the prior art, the water temperature of the cold storage tank is the same as that of the main pipe, so the pipe diameter of the pipeline on the cold storage tank cannot be reduced. This application realizes the control of cold charging and discharging by controlling the valves arranged on the first pipe and the second pipe. When the system is in the cold discharging state, the valve opening is adjusted according to the set value of the mixed water temperature.

[0088] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0089] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0090] In the description of this embodiment, the orientation or positional relationships such as "up", "down", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0091] The above embodiments are only used to illustrate the technical solutions of the present application rather than to limit them. The present application has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application, and all of them should be covered within the scope of the claims of the present application.

[0092] A data center distributed chilled water storage system, comprising a water supply pipe and a water return pipe connected to a load area, wherein the water supply pipe and the water return pipe are arranged according to a ring network structure, and at least one branch main pipe is provided on the main pipe of the ring network structure. It is characterized in that it further comprises: at least one set of chilled water storage systems, and the chilled water storage systems are arranged in parallel on the branch main pipe;

[0093] The chilled water storage system includes a first chiller and at least one chilled water storage tank. When the number of installed chilled water storage tanks is one, the chilled water storage tank and the first chiller form a refrigeration circuit; when the number of installed chilled water storage tanks is at least two, the chilled water storage tanks are arranged in parallel and then form a refrigeration circuit with the first chiller;

[0094] The chilled water storage tank is further configured with a first pipeline and a second pipeline, and the first pipeline and the second pipeline are respectively communicated with the branch main pipe, wherein the diameters of the first pipeline and the second pipeline are both smaller than the diameter of the branch main pipe.

Claims

1. A distributed chilled water storage system for a data center, comprising a water supply pipe and a water return pipe connected to a load area, wherein the water supply pipe and the water return pipe are arranged in a ring network structure, and at least one branch main pipe is provided on the main pipe of the ring network structure. Characterized in that: It further comprises: at least one chilled water storage system, and the chilled water storage systems are arranged in parallel on the branch main pipe; The chilled water storage system includes a first chiller and at least one chilled water storage tank. When the number of the chilled water storage tanks is one, the chilled water storage tank and the first chiller form a refrigeration circuit; when the number of the chilled water storage tanks is at least two, the chilled water storage tanks are arranged in parallel and then form a refrigeration circuit with the first chiller; The chilled water storage tank is further configured with a first pipeline and a second pipeline, and the first pipeline and the second pipeline are respectively communicated with the branch main pipe, wherein the diameters of the first pipeline and the second pipeline are both smaller than the diameter of the branch main pipe.

2. The distributed chilled water storage system for a data center according to claim 1, Characterized in that: When the first chiller is a water-cooled chiller, at least one of the chilled water storage tanks forms a refrigeration circuit with the first chiller.

3. The distributed chilled water storage system for a data center according to claim 2, Characterized in that: The condensing side of the first chiller is connected to the branch main pipe.

4. The distributed chilled water storage system for a data center according to claim 1, Characterized in that: A first valve is provided on the first pipeline, and a second valve is provided on the second pipeline.

5. The distributed chilled water storage system for a data center according to claim 1, Characterized in that: First temperature sensors are respectively arranged on both sides of the branch main pipe communicated with the second pipeline.

6. The distributed chilled water storage system for a data center according to claim 4, Characterized in that: When the chilled water storage system is in the cold charging state, the first valve and the second valve are in the closed state; when the chilled water storage system is in the cold discharging state, the first valve and the second valve are opened, and the opening degree of the second valve is adjusted according to the first temperature sensor.

7. The distributed chilled water storage system for a data center according to claim 1, Characterized in that: A third valve is provided on the first pipeline, a fourth valve is provided on the second pipeline, and a third pipeline is further communicated between the first pipeline and the second pipeline, and a fifth valve is provided on the third pipeline.

8. The distributed chilled water storage system for a data center according to claim 7, Characterized in that: A second temperature sensor is further arranged on the second pipeline.

9. The distributed chilled water storage system for a data center according to claim 8, Characterized in that: When the chilled water storage system is in the cold charging state, the third valve, the fourth valve and the fifth valve are all in the closed state; when the chilled water storage system is in the cold discharging state, the third valve, the fourth valve and the fifth valve are opened, and the opening degrees of the third valve and the fifth valve are adjusted according to the second temperature sensor.

10. The distributed chilled water storage system for a data center according to claim 1, Characterized in that: A three-way valve is provided on the first pipeline, and a fourth pipeline is also connected between the first pipeline and the second pipeline through the three-way valve. A sixth valve is also provided on the second pipeline.

11. The data center distributed chilled water storage system according to claim 10, characterized in that, a third temperature sensor is also provided on the second pipeline.

12. The data center distributed chilled water storage system according to claim 11, characterized in that, when the chilled water storage system is in the charging state, the main circuit of the three-way valve, the bypass circuit of the three-way valve, and the sixth valve are all in the closed state. When the chilled water storage system is in the discharging state, the main circuit of the three-way valve, the bypass circuit of the three-way valve, and the sixth valve are all in the open state, wherein the opening degrees of the main circuit of the three-way valve and the bypass circuit of the three-way valve are adjusted according to the third temperature sensor.

13. The data center distributed chilled water storage system according to claim 1, characterized in that, when the first chiller is an air-cooled chiller, the air-cooled chiller and the chilled water storage tank form a refrigeration circuit; when the number of the chilled water storage tanks is multiple, the chilled water storage tanks are connected in parallel and then form a refrigeration circuit with the air-cooled chiller.

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