Semi-distributed heat recovery system of data center and control method of heat recovery system

Abstract

The invention provides a data center semi-distributed heat recovery system and a control method of the heat recovery system. The system comprises a chilled water loop system, the chilled water loop system comprises a chilled water return loop, a chilled water supply loop and a refrigeration unit, one end of the refrigeration unit is connected with the chilled water return loop, and the other end of the refrigeration unit is connected with the chilled water supply loop; one end of the water-cooling precision air conditioner is connected with the chilled water return loop, the other end of the water-cooling precision air conditioner is connected with the chilled water supply loop, and the water-cooling precision air conditioner cools the data center through the chilled water supply loop and recycles heat generated by the data center through the chilled water return loop; the water source multi-connection system comprises a water source multi-connection host and indoor units, the indoor units are connected with the water source multi-connection host in parallel, one end of the water source multi-connection host is connected with the chilled water return loop, and the other end of the water source multi-connection host is connected with the chilled water supply loop. The problem that a heat recovery system in the prior art is difficult to operate continuously and stably is solved.

Description

Technical Field

[0001] The present application relates to the technical field of semi-distributed heat recovery in data centers, and more specifically, to a semi-distributed heat recovery system in data centers, a control method for the semi-distributed heat recovery system in data centers, a computer-readable storage medium, and an electronic device. Background Art

[0002] The cooling load of the air conditioning system is mainly the heat dissipation of electronic information equipment such as servers. Electronic information equipment generates a lot of heat (about 97% of the power consumption is converted into heat) and has a high heat density. The heat source utilization potential of data centers is huge.

[0003] The current centralized heat recovery solution has a small initial heating load, a low load rate for the heat recovery unit, is difficult to keep running, and is difficult to operate and maintain. Summary of the invention

[0004] The main purpose of this application is to provide a data center semi-distributed heat recovery system, a control method for a data center semi-distributed heat recovery system, a computer-readable storage medium and an electronic device, so as to at least solve the problem that the heat recovery system in the prior art is difficult to operate continuously and stably.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a semi-distributed heat recovery system for a data center is provided, comprising: a chilled water loop system, the chilled water loop system comprising a chilled water return loop, a chilled water supply loop and a refrigeration unit, one end of the refrigeration unit being connected to the chilled water return loop, and the other end being connected to the chilled water supply loop; a water-cooled precision air conditioner, one end of the water-cooled precision air conditioner being connected to the chilled water return loop, and the other end being connected to the chilled water supply loop, the water-cooled precision air conditioner cools the data center through the chilled water supply loop and recovers the heat generated by the data center through the chilled water return loop; a water source multi-connection system, the water source multi-connection system comprising a water source multi-connection main unit and indoor units, each of the indoor units being connected in parallel to the water source multi-connection main unit, one end of the water source multi-connection main unit being connected to the chilled water return loop, and the other end being connected to the chilled water supply loop.

[0006] Optionally, the water source multi-split system further includes an expansion valve, which is installed between the water source multi-split host and the indoor unit and is used to adjust the air outlet temperature of the indoor unit by adjusting the opening of the expansion valve.

[0007] Optionally, the data center semi-distributed heat recovery system also includes a water-side regulating valve, which is installed between the water-cooled precision air conditioner and the chilled water supply loop, and between the water source multi-connected host and the chilled water supply loop.

[0008] According to another aspect of the present application, a control method for any one of the semi-distributed heat recovery systems of the data center is provided, comprising: obtaining the ambient temperature; adjusting at least the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host according to at least the relationship between the ambient temperature and the first preset temperature or the second preset temperature, wherein the first preset temperature is lower than the second preset temperature.

[0009] Optionally, at least the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host are adjusted based on the relationship between the ambient temperature and the first preset temperature, including: when it is determined that the ambient temperature is less than the first preset temperature, obtaining the first supply air temperature of the indoor unit; constructing a first mapping relationship table between the first supply air temperature and the opening of the expansion valve, and adjusting the opening of the expansion valve according to the indoor unit supply air temperature and the first mapping relationship table; obtaining the second supply air temperature of the water-cooled precision air conditioner, and constructing a second mapping relationship table between the second supply air temperature and the opening of the water-side regulating valve of the water-cooled precision air conditioner; adjusting the opening of the water-side regulating valve of the water-cooled precision air conditioner according to the second supply air temperature and the second mapping relationship table; obtaining the return water temperature of the chilled water return loop entering the refrigeration unit, and adjusting the operating frequency of the refrigeration unit according to the return water temperature.

[0010] Optionally, after determining that the ambient temperature is lower than the first preset temperature, the method further includes: obtaining the load rate and evaporation pressure of the water source multi-connected main unit; adjusting the operating frequency of the water source multi-connected main unit according to the load rate of the water source multi-connected main unit, and adjusting the opening of the water side regulating valve of the water source multi-connected main unit according to the evaporation pressure of the water source multi-connected main unit.

[0011] Optionally, at least the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host are adjusted based on the relationship between the ambient temperature and the second preset temperature, including: when it is determined that the ambient temperature is greater than the second preset temperature, obtaining the first supply air temperature of the indoor unit; constructing a first mapping relationship table between the first supply air temperature and the opening of the expansion valve, and adjusting the opening of the expansion valve according to the indoor unit supply air temperature and the first mapping relationship table; obtaining the second supply air temperature of the water-cooled precision air conditioner, and constructing a second mapping relationship table between the second supply air temperature and the opening of the water-side regulating valve of the water-cooled precision air conditioner; adjusting the opening of the water-side regulating valve of the water-cooled precision air conditioner according to the second supply air temperature and the second mapping relationship table; obtaining the return water temperature of the chilled water return loop entering the refrigeration unit, and adjusting the operating frequency of the refrigeration unit according to the return water temperature.

[0012] Optionally, after determining that the ambient temperature is greater than the second preset temperature, the method further includes: obtaining the load rate and condensing pressure of the water source multi-connected host; adjusting the operating frequency of the water source multi-connected host according to the load rate of the water source multi-connected host, and adjusting the opening of the water side regulating valve of the water source multi-connected host according to the condensing pressure of the water source multi-connected host.

[0013] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the control methods for the semi-distributed heat recovery system of the data center.

[0014] According to another aspect of the present application, an electronic device is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include a control method for executing any one of the semi-distributed heat recovery systems of a data center.

[0015] The technical solution of the present application is applied, a chilled water loop system, the chilled water loop system includes a chilled water return loop, a chilled water supply loop and a refrigeration unit, one end of the refrigeration unit is connected to the chilled water return loop, and the other end is connected to the chilled water supply loop; a water-cooled precision air conditioner, one end of the water-cooled precision air conditioner is connected to the chilled water return loop, and the other end is connected to the chilled water supply loop, the water-cooled precision air conditioner cools the data center through the chilled water supply loop and recovers the heat generated by the data center through the chilled water return loop; a water source multi-connection system, the water source multi-connection system includes a water source multi-connection host and an indoor unit, the indoor unit is connected in parallel with the water source multi-connection host, one end of the water source multi-connection host is connected to the chilled water return loop, and the other end is connected to the chilled water supply loop. The system makes full use of the waste heat of the data center, adopts the heat recovery method of the water source multi-connection heat pump, and distributes heat recovery equipment near the heat load demand point to accurately match the heating demand and reduce the cooling load of the data center. The comprehensive utilization of data center energy is achieved, and carbon emissions are reduced. The problem that the heat recovery system in the prior art is difficult to operate continuously and stably is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1A structural diagram of a semi-distributed heat recovery system for a data center provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic flow chart of a control method for a semi-distributed heat recovery system of a data center provided in accordance with an embodiment of the present application is shown;

[0019] Figure 3 A schematic diagram of a summer control method for a semi-distributed heat recovery system of a data center provided according to an embodiment of the present application is shown;

[0020] Figure 4 A schematic diagram of a winter control method for a semi-distributed heat recovery system of a data center provided in accordance with an embodiment of the present application is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Chilled water loop system; 101. Chilled water supply loop; 102. Chilled water return loop; 103. Refrigeration unit; 104. Water side regulating valve; 20. Water-cooled precision air conditioner; 30. Water source multi-connected system; 301. Water source multi-connected host; 302. Indoor unit; 303. Expansion valve. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] As introduced in the background technology, the heat recovery system of the prior art is difficult to operate continuously and stably. In order to solve the problem that the heat recovery system of the prior art is difficult to operate continuously and stably, the embodiments of the present application provide a semi-distributed heat recovery system for a data center, a control method for a semi-distributed heat recovery system for a data center, a computer-readable storage medium and an electronic device.

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] Figure 1 It is a structural diagram of a semi-distributed heat recovery system in a data center, such as Figure 1 As shown, the system includes:

[0029] A chilled water loop system 10, wherein the chilled water loop system 10 comprises a chilled water return loop 102, a chilled water supply loop 101 and a refrigeration unit 103, wherein one end of the refrigeration unit 103 is connected to the chilled water return loop 102, and the other end is connected to the chilled water supply loop 101;

[0030] A water-cooled precision air conditioner 20, one end of which is connected to the chilled water return loop 102, and the other end is connected to the chilled water supply loop 101. The water-cooled precision air conditioner 20 cools the data center through the chilled water supply loop 101 and recovers the heat generated by the data center through the chilled water return loop 102;

[0031] The water source multi-connected system 30 includes a water source multi-connected main unit 301 and indoor units 302. Each of the indoor units 302 is connected in parallel with the water source multi-connected main unit 301. One end of the water source multi-connected main unit 301 is connected to the chilled water return loop 102, and the other end is connected to the chilled water supply loop 101.

[0032] Specifically, the chilled water supply loop and the chilled water return loop adopt a loop pipe method. The refrigeration unit, water-cooled precision air conditioner, and water source multi-split host are connected to the chilled water supply loop and the chilled water return loop, and isolation butterfly valves are also set between each device. The water-cooled precision air conditioner absorbs the heat of the data center and releases it to the chilled water return of the data center to heat the chilled water return pipeline of the data center. The water source multi-split host is semi-distributed and connected to the indoor unit or fresh air unit in the area under its jurisdiction. The water source multi-split host absorbs the coldness of the terminal heat load side (indoor unit, fresh air unit) and releases it to the chilled water return of the data center to reduce the temperature of the chilled water return pipeline of the data center. The water source multi-split host itself can be connected to multiple indoor units or fresh air units and other terminal devices. The refrigeration unit on the cold source side is also connected in series with the cold storage tank to maintain the stability of the chilled water supply temperature.

[0033] The system makes full use of the waste heat of the data center, adopts the heat recovery method of water source multi-connected heat pump, and distributes heat recovery equipment near the heat load demand point to accurately match the heating demand and reduce the cooling load of the data center. It realizes the comprehensive utilization of data center energy and reduces carbon emissions. It solves the problem that the heat recovery system of the existing technology is difficult to operate continuously and stably.

[0034] An alternative solution, such as Figure 1 As shown, the water source multi-connected system 30 further includes an expansion valve 303 , which is installed between the water source multi-connected host 301 and the indoor unit 302 , and is used to adjust the air outlet temperature of the indoor unit 302 by adjusting the opening of the expansion valve 303 .

[0035] An optional solution is that the semi-distributed heat recovery system of the data center also includes a water-side regulating valve 104, which is installed between the water-cooled precision air conditioner 20 and the chilled water supply loop 101, and between the water source multi-connected host 301 and the chilled water supply loop 101.

[0036] Figure 2 It is a flow chart of a control method of a semi-distributed heat recovery system of a data center according to an embodiment of the present application.

[0037] like Figure 2 As shown, the method comprises the following steps:

[0038] Step S201, obtaining the ambient temperature;

[0039] Specifically, the current season, such as winter or summer, can be determined according to the ambient temperature.

[0040] Step S202, at least adjusting the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host according to the relationship between the above-mentioned ambient temperature and the first preset temperature or the second preset temperature, wherein the above-mentioned first preset temperature is lower than the second preset temperature.

[0041] If the temperature is lower than the first preset temperature, the current season is considered to be winter, and if the temperature is higher than the second preset temperature, the current season is considered to be summer;

[0042] Specifically, according to the relationship between the ambient temperature and the first preset temperature or the second preset temperature, different control strategies are selected to control the normal operation of the semi-distributed heat recovery system of the data center to realize the recovery and use of heat generated by the data center, so as to achieve the purpose of energy saving.

[0043] Through this embodiment, the ambient temperature is obtained; at least the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host are adjusted according to the relationship between the ambient temperature and the first preset temperature or the second preset temperature, wherein the first preset temperature is less than the second preset temperature. By effectively utilizing the waste heat recovery of the data center, the heat recovery can be used to supply heat to the outside while reducing the cooling load of the data center, realizing the comprehensive utilization of the energy of the data center and reducing carbon emissions.

[0044] In a specific implementation process, at least according to the magnitude relationship between the above-mentioned ambient temperature and the first preset temperature, at least the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host are adjusted, including:

[0045] When it is determined that the above-mentioned ambient temperature is lower than the above-mentioned first preset temperature, the first supply air temperature of the indoor unit is obtained; a first mapping relationship table between the above-mentioned first supply air temperature and the opening of the above-mentioned expansion valve is constructed, and the opening of the above-mentioned expansion valve is adjusted according to the above-mentioned indoor unit supply air temperature and the above-mentioned first mapping relationship table; the second supply air temperature of the above-mentioned water-cooled precision air conditioner is obtained, and a second mapping relationship table between the above-mentioned second supply air temperature and the opening of the water-side regulating valve of the above-mentioned water-cooled precision air conditioner is constructed; the opening of the water-side regulating valve of the above-mentioned water-cooled precision air conditioner is adjusted according to the above-mentioned second supply air temperature and the above-mentioned second mapping relationship table; the return water temperature of the chilled water return loop entering the above-mentioned refrigeration unit is obtained, and the operating frequency of the above-mentioned refrigeration unit is adjusted according to the above-mentioned return water temperature.

[0046] Specifically, after determining that the above-mentioned ambient temperature is lower than the above-mentioned first preset temperature, the above-mentioned method further includes: obtaining the load rate and evaporation pressure of the water source multi-split main unit; adjusting the working frequency of the above-mentioned water source multi-split main unit according to the above-mentioned load rate of the above-mentioned water source multi-split main unit, and adjusting the opening of the water side regulating valve of the above-mentioned water source multi-split main unit according to the above-mentioned evaporation pressure of the above-mentioned water source multi-split main unit.

[0047] In the case where it is determined that the current ambient temperature is less than the first preset temperature, the method determines that the current season is winter, and the indoor unit or fresh air fan of the water source multi-split host adjusts the opening of its own expansion valve according to the outlet air temperature. When the outlet air temperature increases, the expansion valve opening is reduced, and when the outlet air temperature decreases, the expansion valve opening is increased. The compressor of the water source multi-split host automatically adjusts the frequency according to the load rate. When the evaporation pressure of the water source multi-split host increases, the water side valve opening is increased, and when the evaporation pressure decreases, the water side valve opening is reduced.

[0048] Water-cooled precision air conditioners adjust the water-side valve opening according to the supply air temperature. The valve opening increases as the temperature rises, and decreases as the temperature decreases. The fan frequency is adjusted according to the return air temperature. The frequency increases as the return air temperature rises, and decreases as the return air temperature decreases.

[0049] The refrigeration unit on the cold source side automatically adjusts its own frequency to match the unit load rate according to the difference between the heat released by the water-cooled precision air conditioner in the data center and the heat absorbed by the water source multi-split host in the data center, thereby balancing the heat of the entire circulation loop.

[0050] Further, at least according to the magnitude relationship between the above-mentioned ambient temperature and the second preset temperature, at least the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host are adjusted, including:

[0051] When it is determined that the above-mentioned ambient temperature is greater than the above-mentioned second preset temperature, the first supply air temperature of the above-mentioned indoor unit is obtained; a first mapping relationship table between the above-mentioned first supply air temperature and the opening of the above-mentioned expansion valve is constructed, and the opening of the above-mentioned expansion valve is adjusted according to the above-mentioned indoor unit supply air temperature and the above-mentioned first mapping relationship table; the second supply air temperature of the above-mentioned water-cooled precision air conditioner is obtained, and a second mapping relationship table between the above-mentioned second supply air temperature and the opening of the water-side regulating valve of the above-mentioned water-cooled precision air conditioner is constructed; the opening of the water-side regulating valve of the above-mentioned water-cooled precision air conditioner is adjusted according to the above-mentioned second supply air temperature and the above-mentioned second mapping relationship table; the return water temperature of the chilled water return loop entering the above-mentioned refrigeration unit is obtained, and the operating frequency of the above-mentioned refrigeration unit is adjusted according to the above-mentioned return water temperature.

[0052] Furthermore, after determining that the above-mentioned ambient temperature is greater than the above-mentioned second preset temperature, the above-mentioned method also includes: obtaining the load rate and condensing pressure of the water source multi-split host; adjusting the working frequency of the above-mentioned water source multi-split host according to the above-mentioned load rate of the above-mentioned water source multi-split host, and adjusting the opening of the water side regulating valve of the above-mentioned water source multi-split host according to the above-mentioned condensing pressure of the above-mentioned water source multi-split host.

[0053] In the case where it is determined that the current ambient temperature is greater than the second preset temperature, the method determines that the current season is summer, and the indoor unit or fresh air fan of the water source multi-split host adjusts the opening of its own expansion valve according to the outlet air temperature. When the outlet air temperature increases, the expansion valve opening is increased, and when the outlet air temperature decreases, the expansion valve opening is reduced. The compressor of the water source multi-split host automatically adjusts the frequency according to the load rate. When the condensing pressure of the water source multi-split host increases, the water side valve opening is increased, and when the condensing pressure decreases, the water side valve opening is reduced.

[0054] Water-cooled precision air conditioners adjust the water-side valve opening according to the supply air temperature. The valve opening increases as the temperature rises, and decreases as the temperature decreases. The fan frequency is adjusted according to the return air temperature. The frequency increases as the return air temperature rises, and decreases as the return air temperature decreases.

[0055] The refrigeration unit on the cold source side automatically adjusts its own frequency to match the unit load rate according to the total heat released by the water-cooled precision air conditioner and the water source multi-connected host in the data center, balancing the heat of the entire circulation loop.

[0056] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the control method of the data center semi-distributed heat recovery system of the present application will be described in detail below in combination with specific embodiments.

[0057] The cooling load of the air conditioning system is mainly the heat dissipation of electronic information equipment such as servers. Electronic information equipment generates a lot of heat (about 97% of the power consumption is converted into heat) and has a high heat density. The heat source utilization potential of data centers is huge.

[0058] The prior art has the following problems:

[0059] 1) Currently, the granularity of centralized heat recovery is large, and the demand matching of different terminal load sides is poor. It is impossible to provide heat sources of different temperatures in a differentiated manner to further reduce heating energy consumption.

[0060] 2) Currently, the coverage radius of centralized heat recovery is large, the hydraulic balance between different terminal load sides is poor, the regulation performance is poor, and accurate heating cannot be provided.

[0061] 3) The current centralized heat recovery solution has a small initial heating load and a low load rate for the heat recovery unit, making it difficult to keep it running and making operation and maintenance difficult.

[0062] 4) The centralized heat recovery solution cannot flexibly adjust the cooling or heating mode according to changes in local cooling and heating load demand.

[0063] The present embodiment relates to a specific data center semi-distributed heat recovery system and control method, in which the water supply loop and the return loop adopt a loop pipe method, and the cold source side refrigeration unit, water-cooled precision air conditioner, and water source multi-split host are connected to the chilled water supply and return loop, and isolation butterfly valves are set between each device. The water-cooled precision air conditioner absorbs the heat of the data center, releases it to the data center chilled water return, and heats the data center chilled water return pipeline. The water source multi-split host is semi-distributed, and is connected to the indoor units and fresh air units in the area under its jurisdiction. The water source multi-split host absorbs the coldness of the terminal heat load side (indoor unit, fresh air unit), releases it to the data center chilled water return, and reduces the temperature of the data center chilled water return pipeline. The water source multi-split host itself can be connected to multiple indoor units or fresh air units and other terminal devices. The cold source side refrigeration unit and the cold storage tank are connected in series to maintain the stability of the chilled water supply temperature.

[0064] The system makes full use of the waste heat of the data center, adopts the heat recovery method of water source multi-connected heat pump, and sets medium-granularity heat recovery equipment near the heat load demand point to accurately match the heating demand and reduce the cooling load of the data center. It realizes the comprehensive utilization of data center energy and reduces carbon emissions.

[0065] Control method of semi-distributed heat recovery system in data center (water source multi-connected host heating mode in winter), such as Figure 3 As shown, it specifically includes the following contents:

[0066] The indoor unit or fresh air fan of the water source multi-split host adjusts the opening of its own expansion valve according to the outlet air temperature. When the outlet air temperature increases, the expansion valve opening is reduced, and when the outlet air temperature decreases, the expansion valve opening is increased. The compressor of the water source multi-split host automatically adjusts the frequency according to the load rate. When the evaporation pressure of the water source multi-split host increases, the water side valve opening is increased, and when the evaporation pressure decreases, the water side valve opening is reduced.

[0067] The water-side precision air conditioner adjusts the water-side valve opening according to the supply air temperature. The valve opening increases when the temperature rises, and decreases when the temperature decreases. The fan frequency is adjusted according to the return air temperature. The frequency increases when the return air temperature rises, and decreases when the return air temperature decreases.

[0068] The refrigeration unit on the cold source side automatically adjusts its own frequency to match the unit load rate according to the difference between the heat released by the water-cooled precision air conditioner in the data center and the heat absorbed by the water source multi-connected host in the data center, thereby balancing the heat in the entire circulation circuit.

[0069] Control method of semi-distributed heat recovery system in data center (water source multi-connected host heating mode in summer), such as Figure 4 As shown, it specifically includes the following contents:

[0070] The indoor unit or fresh air fan of the water source multi-split host adjusts the opening of its own expansion valve according to the outlet air temperature. When the outlet air temperature increases, the expansion valve opening is increased, and when the outlet air temperature decreases, the expansion valve opening is reduced. The compressor of the water source multi-split host automatically adjusts the frequency according to the load rate. When the condensing pressure of the water source multi-split host increases, the water side valve opening is increased, and when the condensing pressure decreases, the water side valve opening is reduced.

[0071] The water-side precision air conditioner adjusts the water-side valve opening according to the supply air temperature. The valve opening increases when the temperature rises, and decreases when the temperature decreases. The fan frequency is adjusted according to the return air temperature. The frequency increases when the return air temperature rises, and decreases when the return air temperature decreases.

[0072] The refrigeration unit on the cold source side automatically adjusts its own frequency to match the unit load rate according to the total heat released by the water-cooled precision air conditioner and the water source multi-connected host in the data center, balancing the heat of the entire circulation loop.

[0073] The semi-distributed heat recovery system of the data center in this application makes full use of the waste heat of the data center, adopts the heat recovery method of the water source multi-split heat pump, and distributes medium-granularity heat recovery equipment near the heat load demand point to accurately match the heating demand. The water supply loop and the return loop adopt a ring pipe method. The cold source side refrigeration unit, water-cooled precision air conditioner, and water source multi-split host are connected to the chilled water supply and return loop, and isolation butterfly valves are set between each device. The water source multi-split host, water-cooled precision air conditioner, and cold source side refrigeration unit automatically adjust their respective frequencies to match the load rate so that the entire chilled water circulation loop reaches heat balance. The semi-distributed water source multi-split host can flexibly adjust the cooling or heating mode according to changes in the cold and hot load demands.

[0074] The embodiments of the present application have the following advantages:

[0075] 1) Effective use of waste heat recovery in data centers. While heat recovery is used to supply heat to the outside, it reduces the cooling load of the data center, realizes the comprehensive utilization of data center energy, and reduces carbon emissions.

[0076] 2) The heat recovery method, granularity and coverage radius of the heat recovery unit are precisely matched with the heat load side.

[0077] 3) In view of the differences in different heat recovery load sides, the hydraulic imbalance problem and the single heating temperature problem of centralized heat recovery heating are solved.

[0078] 4) The control method of each unit is simple and easy to operate and maintain.

[0079] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute the control method of the semi-distributed heat recovery system of the data center.

[0080] Specifically, the control method of the semi-distributed heat recovery system of the data center includes:

[0081] Step S201, obtaining the ambient temperature;

[0082] Step S202, at least adjusting the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host according to the relationship between the above-mentioned ambient temperature and the first preset temperature or the second preset temperature, wherein the above-mentioned first preset temperature is lower than the second preset temperature.

[0083] An embodiment of the present invention provides an electronic device, the device comprising a processor, a memory, and a program stored in the memory and executable on the processor, and when the processor executes the program, at least the following steps are implemented:

[0084] Step S201, obtaining the ambient temperature;

[0085] Step S202, at least adjusting the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host according to the relationship between the above-mentioned ambient temperature and the first preset temperature or the second preset temperature, wherein the above-mentioned first preset temperature is lower than the second preset temperature.

[0086] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0087] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0088] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0089] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0090] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0091] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0092] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0093] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0094] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A semi-distributed heat recovery system for a data center, characterized in that: include: A chilled water loop system, the chilled water loop system comprising a chilled water return loop, a chilled water supply loop and a refrigeration unit, one end of the refrigeration unit being connected to the chilled water return loop and the other end being connected to the chilled water supply loop; A water-cooled precision air conditioner, one end of which is connected to the chilled water return loop, and the other end of which is connected to the chilled water supply loop. The water-cooled precision air conditioner cools the data center through the chilled water supply loop and recovers the heat generated by the data center through the chilled water return loop; A water source multi-connected system, the water source multi-connected system includes a water source multi-connected main unit and indoor units, each of the indoor units is connected in parallel with the water source multi-connected main unit, one end of the water source multi-connected main unit is connected to the chilled water return loop, and the other end is connected to the chilled water supply loop.

2. The data center semi-distributed heat recovery system according to claim 1, characterized in that: The water source multi-split system also includes an expansion valve, which is installed between the water source multi-split host and the indoor unit and is used to adjust the air outlet temperature of the indoor unit by adjusting the opening of the expansion valve.

3. The data center semi-distributed heat recovery system according to claim 1, characterized in that: The data center semi-distributed heat recovery system also includes a water-side regulating valve, which is installed between the water-cooled precision air conditioner and the chilled water supply loop, and between the water source multi-connected host and the chilled water supply loop.

4. A control method for a semi-distributed heat recovery system for a data center as claimed in any one of claims 1 to 3, characterized in that: include: Get the ambient temperature; At least according to the relationship between the ambient temperature and the first preset temperature or the second preset temperature, at least the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host are adjusted, wherein the first preset temperature is lower than the second preset temperature.

5. The method according to claim 4, characterized in that At least according to the magnitude relationship between the ambient temperature and the first preset temperature, at least adjusting the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host, including: When it is determined that the ambient temperature is less than the first preset temperature, obtaining a first air supply temperature of the indoor unit; Constructing a first mapping relationship table between the first air supply temperature and the opening of the expansion valve, and adjusting the opening of the expansion valve according to the indoor unit air supply temperature and the first mapping relationship table; Acquire a second air supply temperature of the water-cooled precision air conditioner, and construct a second mapping relationship table between the second air supply temperature and the opening of the water-side regulating valve of the water-cooled precision air conditioner; adjusting the opening of the water-side regulating valve of the water-cooled precision air conditioner according to the second air supply temperature and the second mapping relationship table; The return water temperature of the chilled water return loop entering the refrigeration unit is obtained, and the operating frequency of the refrigeration unit is adjusted according to the return water temperature.

6. The method according to claim 5, characterized in that After determining that the ambient temperature is less than the first preset temperature, the method further includes: Obtain the load rate and evaporation pressure of the water source multi-connector host; The operating frequency of the water source multi-connected main machine is adjusted according to the load rate of the water source multi-connected main machine, and the opening of the water side regulating valve of the water source multi-connected main machine is adjusted according to the evaporation pressure of the water source multi-connected main machine.

7. The method according to claim 4, characterized in that At least according to the magnitude relationship between the ambient temperature and the second preset temperature, at least adjusting the operating frequency of the refrigeration unit and the operating frequency of the water source multi-connected host, including: When it is determined that the ambient temperature is greater than the second preset temperature, obtaining a first air supply temperature of the indoor unit; Constructing a first mapping relationship table between the first air supply temperature and the opening of the expansion valve, and adjusting the opening of the expansion valve according to the indoor unit air supply temperature and the first mapping relationship table; Acquire a second air supply temperature of the water-cooled precision air conditioner, and construct a second mapping relationship table between the second air supply temperature and the opening of the water-side regulating valve of the water-cooled precision air conditioner; adjusting the opening of the water-side regulating valve of the water-cooled precision air conditioner according to the second air supply temperature and the second mapping relationship table; The return water temperature of the chilled water return loop entering the refrigeration unit is obtained, and the operating frequency of the refrigeration unit is adjusted according to the return water temperature.

8. The method according to claim 7, characterized in that After determining that the ambient temperature is greater than the second preset temperature, the method further includes: Obtain the load rate and condensing pressure of the water source multi-connector host; The operating frequency of the water source multi-connected main unit is adjusted according to the load rate of the water source multi-connected main unit, and the opening of the water side regulating valve of the water source multi-connected main unit is adjusted according to the condensing pressure of the water source multi-connected main unit.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the control method of the semi-distributed heat recovery system of a data center according to any one of claims 4 to 8.

10. An electronic device, characterized in that: include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include a control method for executing the semi-distributed heat recovery system of a data center as described in any one of claims 4 to 8.

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