A combined energy system for a green liquid-cooled data center

Abstract

This invention belongs to the field of thermal power technology and discloses a combined energy system for a green liquid-cooled data center, including a liquid cooling subsystem, a heat pump subsystem, an energy storage compression cooling subsystem, an energy storage expansion heating subsystem, an organic Rankine cycle power generation system, an absorption cooling subsystem, and a heating subsystem. This invention couples the heat generated by the heat pump subsystem with the compression heat generated by the energy storage compression cooling subsystem and stores it in a high-temperature water tank. The collected heat is distributed according to demand to the energy storage expansion heating subsystem, the organic Rankine cycle power generation system, the absorption cooling subsystem, and the heating subsystem to generate electricity, cooling, and heat respectively, providing these to the data center and surrounding users. This not only reduces the operating costs of the data center but also achieves efficient energy utilization.

Description

Technical Field

[0001] This invention belongs to the field of thermal power technology, and specifically relates to a combined energy system for a green liquid-cooled data center. Background Technology

[0002] With the continuous development of network technology and the accelerating pace of informatization, the construction of large server clusters such as data centers has developed rapidly, and the resulting energy consumption problem has become increasingly serious. According to statistics, only about 15-20% of the electricity consumed by a data center is used for computing and data transmission, while the remaining 80-85% of the electricity is consumed by various devices and converted into heat energy.

[0003] To ensure servers operate at normal operating temperatures, cooling technologies are essential for cooling data centers. With the trend towards higher data center densities, traditional air cooling technologies are increasingly unable to meet their heat dissipation and energy-saving requirements. Therefore, data center cooling technologies are gradually shifting towards liquid cooling. Furthermore, in traditional cooling technologies, the medium carrying waste heat from the data center (such as air or water) typically releases the heat directly into the atmosphere, resulting in a significant amount of heat energy not being effectively utilized. From another perspective, data centers operate continuously around the clock, generating large and stable amounts of heat. If this waste heat could be recovered and utilized, it would significantly improve the energy efficiency of data centers and help reduce their carbon emission burden.

[0004] In existing technologies, data center waste heat is typically used in conjunction with heating networks. For example, patent CN205299850U discloses a data center waste heat recovery system that provides cooling to the data center while also providing domestic hot water and heating to users in surrounding buildings. Another patent, CN117615548A, uses a heat pump unit to stably deliver heat extracted from the data center to heat user-side equipment, achieving the recovery and reuse of data center waste heat. Furthermore, some patents explore the possibility of generating electricity from data center waste heat. For instance, patent CN117387412A utilizes a compressed CO2 energy storage system to convert waste heat from a liquid-cooled data center into electricity, supplying power to the data center and thus achieving peak shaving and valley filling for the power grid.

[0005] While existing technologies have made some progress in data center waste heat recovery and utilization, many shortcomings remain. Most solutions only achieve a single function, such as using data center waste heat for heating or power generation, lacking the ability for multi-functional integrated utilization, resulting in low overall energy efficiency. Furthermore, existing systems generally have low integration levels, with each subsystem often operating independently, failing to achieve overall system optimization and maximize energy utilization. At the same time, existing technologies lack sufficient flexibility and adaptability in responding to seasonal changes and fluctuations in load demand. Summary of the Invention

[0006] To address the above problems, this invention provides a combined energy system for a green liquid-cooled data center, employing the following technical solution:

[0007] A combined energy system for a green liquid-cooled data center includes:

[0008] The liquid cooling subsystem is used to absorb heat from the data center and cool it down.

[0009] The heat pump subsystem is used to absorb heat from the data center, heat the water in the low-temperature water tank, and then transport it to the high-temperature water tank for storage.

[0010] The energy storage compression cooling subsystem is used to heat the water in the low-temperature water tank by using the heat of the compressed air and then transport it to the high-temperature water tank for storage, and to store the compressed air in the high-pressure air storage chamber.

[0011] The energy storage expansion heating subsystem is used to heat the compressed air released from the high-pressure gas storage chamber by using the heat of the hot water in the high-temperature water tank. The heated compressed air then generates electricity and transports the water that has absorbed the heat to the low-temperature water tank.

[0012] The organic Rankine circulating power generation system is used to convert the heat of hot water in a high-temperature water tank into electrical energy and to transfer the water that has absorbed the heat to a low-temperature water tank.

[0013] The absorption refrigeration subsystem is used to convert the heat of hot water in the high-temperature water tank into cold energy to supply cooling to users, and to transport the water whose heat has been absorbed to the low-temperature water tank.

[0014] The heating subsystem is used to supply heat to the heating network using the heat energy in the high-temperature water tank and to transport the water that has absorbed the heat to the low-temperature water tank.

[0015] Furthermore, the liquid cooling subsystem includes a coolant pump and a cooling heat exchanger;

[0016] The inlet of the coolant pump is connected to the outlet of the data center, the outlet of the coolant pump is connected to the inlet of the cooling heat exchanger and the coolant inlet of the heat pump subsystem, and the outlet of the cooling heat exchanger and the coolant outlet of the heat pump subsystem are both connected to the inlet of the data center.

[0017] Furthermore, the liquid cooling subsystem also includes a fan, a first valve, and a second valve;

[0018] The fan is located on one side of the cooling heat exchanger, the first valve is located between the outlet of the coolant pump and the inlet of the cooling heat exchanger, and the second valve is located between the outlet of the coolant pump and the coolant inlet of the heat pump subsystem.

[0019] Furthermore, the heat pump subsystem includes a first evaporator, a compressor, a first motor, a first condenser, and a first throttling valve;

[0020] The output shaft of the first motor is connected to the compressor drive; the air inlet of the compressor is connected to the heat exchange medium outlet of the first evaporator; the air outlet of the compressor is connected to the heat exchange medium inlet of the first condenser; the heat exchange medium outlet of the first condenser is sequentially connected to the first throttling valve and the heat exchange medium inlet of the first evaporator; the water inlet of the first condenser is sequentially connected to the low-temperature water pump and the water outlet of the low-temperature water tank; and the water outlet of the first condenser is connected to the water inlet of the high-temperature water tank.

[0021] Furthermore, the energy storage compression cooling subsystem includes a multi-stage compressor and a second motor connected in series;

[0022] The output shaft of the second motor is connected to the multi-stage air compressor drive; an intercooler is provided between two adjacent air compressor stages and between the last air compressor stage and the high-pressure air storage chamber; the air inlet of the intercooler between two adjacent air compressor stages is connected to the air outlet of the previous air compressor stage, the air outlet of the intercooler between two adjacent air compressor stages is connected to the air inlet of the next air compressor stage, the air outlet of the last air compressor stage is connected to the air inlet of the last intercooler stage, and the air inlet of the high-pressure air storage chamber is connected to the air outlet of the last intercooler stage.

[0023] The inlet of each intercooler is connected in sequence to the outlet of the low-temperature water pump and the low-temperature water tank, and the outlet of each intercooler is connected to the inlet of the high-temperature water tank.

[0024] Furthermore, the energy storage expansion heating subsystem includes a multi-stage turbine connected in series and a first generator;

[0025] The multi-stage turbines connected in series are driven by the first generator; reheaters are provided between the high-pressure gas storage chamber and the first-stage turbine, as well as between two adjacent turbine stages; the air inlet of the reheater between two adjacent turbine stages is connected to the air outlet of the previous turbine stage, the air outlet of the reheater between two adjacent turbine stages is connected to the air inlet of the next turbine stage, the air outlet of the high-pressure gas storage chamber is connected to the air inlet of the first reheater, and the air inlet of the first-stage turbine is connected to the air outlet of the first reheater.

[0026] The inlet of each reheater is connected in sequence to the high-temperature water pump and the outlet of the high-temperature water tank; the outlet of each reheater is connected to the inlet of the low-temperature water tank.

[0027] Furthermore, the organic Rankine cycle power generation system includes a second evaporator, an expander, a second generator, a second condenser, a working fluid pump, a cooling water pump, and a cooling tower;

[0028] The inlet of the second evaporator is connected in sequence to the high-temperature water pump and the outlet of the high-temperature water tank; the outlet of the second evaporator is connected to the inlet of the low-temperature water tank; the heat exchange medium outlet of the second evaporator is connected to the heat exchange medium inlet of the expander; the heat exchange medium outlet of the expander is connected to the heat exchange medium inlet of the second condenser; and the heat exchange medium outlet of the second condenser is connected in sequence to the working fluid pump and the heat exchange medium inlet of the second evaporator. The expander is driven by the second generator.

[0029] The inlet of the second condenser is connected to the outlet of the cooling water pump, the inlet of the cooling water pump is connected to the outlet of the cooling tower, and the inlet of the cooling tower is connected to the outlet of the second condenser.

[0030] Furthermore, the absorption refrigeration subsystem includes a generator, a solution heat exchanger, a solution pump, a second throttle valve, an absorber, a third condenser, a third throttle valve, and a third evaporator;

[0031] The generator's inlet is connected to the high-temperature water pump and the high-temperature water tank in sequence; the generator's outlet is connected to the low-temperature water tank's inlet; the generator's heat exchange medium inlet is connected to the first outlet of the solution heat exchanger; the generator's heat exchange medium outlet is connected to the first inlet of the solution heat exchanger; and the generator's steam outlet is connected to the steam inlet of the third condenser.

[0032] The second inlet of the solution heat exchanger is connected to the outlet of the solution pump, the inlet of the solution pump is connected to the heat exchange medium outlet of the absorber, and the second outlet of the solution heat exchanger is connected to the heat exchange medium inlet of the absorber through the second throttle valve; the outlet of the third condenser is connected to the inlet of the third evaporator through the third throttle valve, and the steam outlet of the third evaporator is connected to the air inlet of the absorber.

[0033] Furthermore, the heating subsystem includes a hot water pump and a heat exchanger;

[0034] The inlet of the heat exchanger is connected in sequence to the outlet of the high-temperature water pump and the high-temperature water tank; the outlet of the heat exchanger is connected to the inlet of the low-temperature water tank; the heat exchange medium inlet of the heat exchanger is connected to the outlet of the hot water pump; the inlet of the hot water pump is connected to the outlet of the heating network; and the heat exchange medium outlet of the heat exchanger is connected to the inlet of the heating network.

[0035] Furthermore, the heat pump subsystem also includes a third valve, which is disposed between the inlet of the first condenser and the outlet of the cryogenic water pump.

[0036] Furthermore, the energy storage compression cooling subsystem also includes a fourth valve, which is located between the inlet of all intercoolers and the outlet of the cryogenic water pump.

[0037] Furthermore, the energy storage expansion heating subsystem also includes a fifth valve and a sixth valve. The fifth valve is located between the outlet of the high-pressure gas storage chamber and the inlet of the first reheater, and the sixth valve is located between the outlet of the high-temperature water pump and the inlets of all reheaters.

[0038] Furthermore, the organic Rankine cycle power generation system includes a seventh valve and an eighth valve. The seventh valve is located between the inlet of the second evaporator and the outlet of the high-temperature water pump, and the eighth valve is located between the inlet of the second condenser and the outlet of the cooling water pump.

[0039] Furthermore, the absorption refrigeration subsystem includes a ninth valve, which is disposed between the inlet of the generator and the outlet of the high-temperature water pump.

[0040] Furthermore, the heating subsystem includes a tenth valve and an eleventh valve. The tenth valve is located between the inlet of the heating heat exchanger and the outlet of the high-temperature water pump, and the eleventh valve is located between the heat exchange medium inlet of the heating heat exchanger and the outlet of the hot water pump.

[0041] The beneficial effects of this invention are:

[0042] 1. This invention couples the heat generated by the heat pump subsystem with the compression heat generated by the energy storage compression cooling subsystem and stores it in a high-temperature water tank. The collected heat is distributed as needed to the energy storage expansion heating subsystem, the organic Rankine cycle power generation system, the absorption cooling subsystem, and the heating subsystem to generate electricity, cooling, and heat respectively, which are then provided to the data center and surrounding users. This not only reduces the operating costs of the data center but also achieves efficient energy utilization in the data center.

[0043] 2. This invention helps alleviate the urban heat island effect by recovering waste heat from liquid-cooled data centers instead of directly releasing it into the atmosphere. Simultaneously, the introduction of compressed air energy storage effectively addresses the issue of output volatility from renewable energy sources such as solar and wind power, promoting the application of renewable energy in data center 11 and driving the development of green data centers 11.

[0044] 3. During off-peak electricity hours, this invention utilizes off-peak electricity to operate the energy storage compression cooling subsystem, generating compression heat and storing it in a high-temperature water tank. During peak electricity hours, the energy storage expansion heating subsystem and the organic Rankine cycle power generation system convert the stored heat energy in the high-temperature water tank into electrical energy to power the data center. Therefore, this system can reduce the electricity costs of the data center during peak hours. Furthermore, this system can also serve as a backup power source for the data center, ensuring uninterrupted and safe operation.

[0045] 4. The heat energy generated by the heat pump subsystem and the energy storage compression cooling subsystem of this invention is jointly stored in a high-temperature water tank. The heat energy in the high-temperature water tank is distributed to each subsystem as needed, improving the system's energy utilization efficiency. Furthermore, because the heat pump subsystem operates 24 / 7, continuously providing heat to the high-temperature water tank, it ensures that the energy storage expansion heating subsystem has a sufficient supply of hot water at all times. This avoids system performance degradation or operational interruptions caused by insufficient hot water supply, significantly improving the system's stability and reliability.

[0046] 5. This invention can flexibly switch between power generation, cooling, and heating modes according to actual needs. Through the coordinated operation of the energy storage expansion heating subsystem, the organic Rankine cycle power generation system, the absorption cooling subsystem, and the heating subsystem, the system can provide the required energy services in different usage scenarios, improving the system's adaptability and flexibility.

[0047] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 A schematic diagram of a combined energy system for a green liquid-cooled data center according to an embodiment of the present invention is shown;

[0050] Figure 2 A schematic diagram of a heat pump subsystem according to an embodiment of the present invention is shown;

[0051] Figure 3 A schematic diagram of the structure of an energy storage compression cooling subsystem according to an embodiment of the present invention is shown;

[0052] Figure 4 A schematic diagram of the structure of an energy storage expansion heating subsystem according to an embodiment of the present invention is shown;

[0053] Figure 5 A schematic diagram of the structure of an organic Rankine cycle electron-generating system according to an embodiment of the present invention is shown;

[0054] Figure 6 A schematic diagram of an absorption refrigeration subsystem according to an embodiment of the present invention is shown.

[0055] In the diagram: 1. Liquid cooling subsystem; 2. Heat pump subsystem; 3. Energy storage compression cooling subsystem; 4. High-pressure gas storage chamber; 5. Energy storage expansion heating subsystem; 6. Organic Rankine cycle power generation system; 7. Absorption refrigeration subsystem; 8. Heating subsystem;

[0056] 11. Data center; 12. Coolant pump; 13. First valve; 14. Cooling heat exchanger; 15. Fan; 16. Second valve;

[0057] 21. Third valve; 22. First evaporator; 23. Compressor; 24. First motor; 25. First condenser; 26. First throttle valve;

[0058] 31. Fourth valve; 32. Second motor; 33. Low-pressure air compressor; 34. Low-pressure intercooler; 35. Medium-pressure air compressor; 36. Medium-pressure intercooler; 37. High-pressure air compressor; 38. High-pressure intercooler;

[0059] 41. Fifth valve; 51. Sixth valve; 52. High-pressure reheater; 53. High-pressure turbine; 54. Medium-pressure reheater; 55. Medium-pressure turbine; 56. Low-pressure reheater; 57. Low-pressure turbine; 58. First generator;

[0060] 61. Seventh valve; 62. Second evaporator; 63. Expander; 64. Second generator; 65. Second condenser; 66. Working fluid pump; 67. Eighth valve; 68. Cooling water pump; 69. Cooling tower;

[0061] 71. Ninth valve; 72. Generator; 73. Solution heat exchanger; 74. Solution pump; 75. Second throttle valve; 76. Absorber; 77. Third condenser; 78. Third throttle valve; 79. Third evaporator;

[0062] 81. Tenth valve; 82. Hot water pump; 83. Eleventh valve; 84. Heat exchanger; 91. Low temperature water tank; 92. Low temperature water pump; 101. High temperature water tank; 102. High temperature water pump. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0065] This invention provides a combined energy system for a green liquid-cooled data center, utilizing liquid cooling technology to recover waste heat from the data center and avoid energy waste. By coupling heat pumps, compressed air energy storage, organic Rankine cycles, absorption refrigeration, and heating technologies, it can not only convert waste heat into electricity, heat, and cooling to meet the diverse energy needs of the data center and surrounding buildings, but also raise the temperature of waste heat during off-peak hours through heat pumps and couple it with heat obtained from compressed air energy storage to release electricity during peak hours, thereby achieving peak shaving and valley filling of the power grid and reducing the operating costs of the data center. Furthermore, data centers with coupled energy storage are conducive to integration with renewable energy sources, further promoting the application of green energy.

[0066] like Figure 1 As shown, a combined energy system for a green liquid-cooled data center 11 includes a liquid cooling subsystem 1, a heat pump subsystem 2, an energy storage compression cooling subsystem 3, an energy storage expansion heating subsystem 5, an organic Rankine cycle power generation system 6, an absorption cooling subsystem 7, and a heating subsystem 8.

[0067] The liquid cooling subsystem 1 is used to absorb heat from the data center 11 and cool it. The liquid cooling subsystem 1 also recovers waste heat from the data center 11, which uses liquid cooling technology to cool its servers. The coolant is a fluorinated liquid, and after heat exchange with the servers, the coolant temperature can reach 60-70℃.

[0068] Heat pump subsystem 2 is used to absorb heat from data center 11, heating the water in low-temperature water tank 91 and then transferring it to high-temperature water tank 101 for storage. Heat pump subsystem 2 utilizes the waste heat generated by the liquid-cooled data center 11, raising the waste heat from 60-70℃ to 120-150℃ through a heat exchange medium and storing it in high-temperature water tank 101. Heat pump subsystem 2 ensures that the waste heat from the liquid-cooled data center 11 is recovered and stored in high-temperature water tank 101 around the clock.

[0069] The energy storage compression cooling subsystem 3 is used to compress air, use the heat of the compressed air to heat the water in the low temperature water tank 91 and then transport it to the high temperature water tank 101 for storage, and store the compressed air in the high pressure air storage chamber 4.

[0070] During off-peak electricity hours, the energy storage compression cooling subsystem 3 uses off-peak electricity to compress air and store it in the high-pressure air storage chamber 4. During compression, the air temperature rises, generating compression heat with a temperature range of 120-150°C. This compression heat is stored as hot water in the high-temperature water tank 101 and mixes with the hot water stored in the heat pump subsystem 2. The energy storage compression cooling subsystem 3 effectively converts off-peak electricity into air pressure energy and thermal energy, storing them in the system for later use.

[0071] The energy storage expansion heating subsystem 5 is used to heat the compressed air released from the high-pressure air storage chamber 4 by using the heat of the hot water in the high-temperature water tank 101. The heated compressed air drives the generation of electrical energy and transports the water that has absorbed the heat to the low-temperature water tank 91.

[0072] During peak electricity demand periods, when power is needed, the energy storage expansion heating subsystem 5 utilizes the compressed air released from the high-pressure gas storage chamber 4 and the heat energy from the high-temperature water tank 101 to generate electricity for use. In this way, the peak power consumption of the data center 11 can be effectively reduced, thereby reducing the power costs of the data center 11.

[0073] The organic Rankine cycle power generation system 6 is used to convert the heat of the hot water in the high-temperature water tank 101 into electrical energy and to transport the water with absorbed heat to the low-temperature water tank 91. During peak electricity periods, the organic Rankine cycle power generation system 6 absorbs the heat energy in the high-temperature water tank 101 through an organic working fluid and drives the expander 63 to generate electricity. The heat energy is converted into electrical energy output, further increasing the power generation of the system.

[0074] The absorption cooling subsystem 7 is used to convert the heat of the hot water in the high-temperature water tank 101 into cooling energy to supply cooling to users, and to transport the water with absorbed heat to the low-temperature water tank 91. When users in buildings surrounding the data center 11 have cooling needs, the absorption cooling subsystem 7 is driven by the heat energy in the high-temperature water tank 101 to meet the users' cooling needs.

[0075] The heating subsystem 8 is used to supply heat to the heating network using the heat energy in the high-temperature water tank 101 and to transport the water that has absorbed heat to the low-temperature water tank 91. When users in buildings around the data center 11 have heating needs, the heating subsystem 8 transfers the heat energy in the high-temperature water tank 101 to the surrounding heating network to ensure the effective transfer of high-temperature heat energy and meet the heating needs of users in buildings around the data center 11.

[0076] Through the coordinated operation of the above subsystems, this invention constructs a highly efficient, green liquid-cooled data center 11 combined energy system. By coupling and storing the heat energy of the heat pump subsystem 2 and the energy storage compression cooling subsystem 3, the overall heat recovery efficiency of the system is significantly improved. The heat energy stored in the high-temperature water tank 101 is first distributed to the energy storage expansion heating subsystem 5. By converting the heat energy in the high-temperature water tank 101 into electrical energy, the system can ensure a stable power supply during peak hours.

[0077] Furthermore, the organic Rankine cycle power generation system 6 generates electricity by absorbing heat energy from the high-temperature water tank 101 using an organic heat exchange medium, further increasing the system's power output. The absorption refrigeration subsystem 7 utilizes the heat energy from the high-temperature water tank 101 to drive an absorption refrigeration cycle, generating cooling capacity to meet the cooling needs of buildings surrounding the data center 11. In terms of heating, the heating subsystem 8 transfers heat energy from the high-temperature water tank 101 to the heating network, providing stable and reliable heat energy to meet the heating needs of users in buildings surrounding the data center 11. Through the coordinated operation of these subsystems, this invention achieves efficient waste heat recovery and multi-energy complementarity, significantly improving energy utilization efficiency and promoting the application of green energy and sustainable development.

[0078] like Figure 1 As shown, for example, the liquid cooling subsystem 1 includes a coolant pump 12, a first valve 13, a cooling heat exchanger 14, a fan 15, and a second valve 16. The inlet of the coolant pump 12 is connected to the outlet of the data center 11, and the outlet of the coolant pump 12 is connected to the inlet of the cooling heat exchanger 14 and the coolant inlet of the heat pump subsystem 2. The outlet of the cooling heat exchanger 14 and the coolant outlet of the heat pump subsystem 2 are both connected to the inlet of the data center 11. The fan 15 is located on one side of the cooling heat exchanger 14 and is used to introduce a natural cold source to reduce the temperature of the coolant flowing through the cooling heat exchanger 14.

[0079] The first valve 13 is located between the outlet of the coolant pump 12 and the inlet of the cooling heat exchanger 14, and the second valve 16 is located between the outlet of the coolant pump 12 and the coolant inlet of the heat pump subsystem 2.

[0080] The coolant first flows through the data center 11, absorbing the heat generated by the servers. After passing through the outlet of the coolant pump 12, the coolant is divided into two streams, with the flow direction of each stream controlled by the first valve 13 and the second valve 16. One stream of coolant flows through the cooling heat exchanger 14 for heat dissipation. The fan 15 introduces natural cold source through the blower to reduce the temperature of the coolant flowing through the cooling heat exchanger 14. This stream is only used to provide backup cooling for the data center 11 when the heat pump subsystem 2 fails or shuts down. The other stream of coolant enters the first evaporator 22 of the heat pump subsystem 2, where it exchanges heat with the working fluid in the heat pump subsystem 2 to provide heat for the heat pump subsystem 2.

[0081] like Figure 1 and Figure 2 As shown, for example, the heat pump subsystem 2 also includes a third valve 21, a first evaporator 22, a compressor 23, a first motor 24, a first condenser 25, and a first throttle valve 26.

[0082] The output shaft of the first motor 24 is connected to the compressor 23, consuming electrical energy to drive the compressor 23 to work. The air inlet of the compressor 23 is connected to the heat exchange medium outlet of the first evaporator 22, and the air outlet of the compressor 23 is connected to the heat exchange medium inlet of the first condenser 25. The heat exchange medium outlet of the first condenser 25 is connected to the first throttle valve 26 and the heat exchange medium inlet of the first evaporator 22 in sequence. The water inlet of the first condenser 25 is connected to the outlet of the low-temperature water pump 92, and the inlet of the low-temperature water pump 92 is connected to the outlet of the low-temperature water tank 91. The water outlet of the first condenser 25 is connected to the water inlet of the high-temperature water tank 101. The third valve 21 is set between the water inlet of the first condenser 25 and the outlet of the low-temperature water pump 92.

[0083] When heat pump subsystem 2 is running, the third valve 21 opens, and the heat exchange medium absorbs heat from the coolant of data center 11 in the first evaporator 22, while simultaneously releasing cooling energy. Subsequently, the evaporated heat exchange medium enters compressor 23 for compression, generating a high-temperature, high-pressure heat exchange medium. The compressed heat exchange medium then flows into the first condenser 25 to release heat. Finally, the heat exchange medium is depressurized through the first throttling valve 26, completing the heat pump cycle. Simultaneously, pressurized water stored in low-temperature water tank 91 is pumped to the first condenser 25 by low-temperature water pump 92, where it absorbs the heat released by the heat exchange medium. The heated pressurized water then flows into high-temperature water tank 101 for storage.

[0084] like Figure 1 and Figure 3 As shown, for example, the energy storage compression cooling subsystem 3 includes a multi-stage air compressor connected in series, a second motor 32, and a fourth valve 31. The output shaft of the second motor 32 is driven and connected to the multi-stage air compressor. Intercoolers are provided between adjacent air compressors and between the last air compressor and the high-pressure air storage chamber 4. The air inlet of the intercooler between adjacent air compressors is connected to the air outlet of the previous air compressor, the air outlet of the intercooler between adjacent air compressors is connected to the air inlet of the next air compressor, the air outlet of the last air compressor is connected to the air inlet of the last intercooler, and the air inlet of the high-pressure air storage chamber 4 is connected to the air outlet of the last intercooler.

[0085] The inlet of each intercooler is connected to the outlet of the low-temperature water pump 92, and the outlet of each intercooler is connected to the inlet of the high-temperature water tank 101; the fourth valve 31 is located between the inlets of all intercoolers and the outlet of the low-temperature water pump 92.

[0086] The number of stages and intercoolers in the air compressor of the energy storage compression cooling subsystem 3 can be adjusted according to actual needs, such as... Figure 3 As shown, for example, a multi-stage air compressor in series includes a low-pressure air compressor 33, a medium-pressure air compressor 35, and a high-pressure air compressor 37 connected in series. The output shaft of the second motor 32 is driven and connected to the low-pressure air compressor 33, the medium-pressure air compressor 35, and the high-pressure air compressor 37. A low-pressure intercooler 34 is provided between the low-pressure air compressor 33 and the medium-pressure air compressor 35. A medium-pressure intercooler 36 is provided between the medium-pressure air compressor 35 and the high-pressure compressor. A high-pressure intercooler 38 is provided at the outlet of the high-pressure air compressor 37.

[0087] During off-peak electricity hours, the fourth valve 31 opens, and the energy storage compression and cooling subsystem 3 begins operation. Air first enters the low-pressure air compressor 33 driven by a motor for first-stage compression. The compressed, high-temperature air then enters the low-pressure intercooler 34, where it exchanges heat with pressurized water flowing from the cryogenic water tank 91. The cooled air then enters the medium-pressure air compressor 35 for second-stage compression. The high-temperature air after the second compression enters the medium-pressure intercooler 36, where it again exchanges heat with pressurized water. The cooled air then enters the high-pressure air compressor 37 for third-stage compression. Finally, the high-temperature air after the third compression enters the high-pressure intercooler 38, where it absorbs the heat of compression through pressurized water. The cooled high-pressure air is then stored in the high-pressure air storage chamber 4. Simultaneously, the pressurized water stored in the cryogenic water tank 91 is pumped by the cryogenic water pump 92 to the high, medium, and low-pressure intercoolers 34, where it absorbs the heat of compression from the air. Subsequently, the heated pressurized water flows into the high-temperature water tank 101 for storage.

[0088] like Figure 1 and Figure 4 As shown, for example, the energy storage expansion heating subsystem 5 includes a multi-stage series turbine, a first generator 58, a fifth valve 41, and a sixth valve 51. The multi-stage series turbine is driven and connected to the first generator 58. Reheaters are provided between the high-pressure gas storage chamber 4 and the first-stage turbine, as well as between adjacent two-stage turbines. The air inlet of the reheater between adjacent two-stage turbines is connected to the air outlet of the previous-stage turbine, and the air outlet of the reheater between adjacent two-stage turbines is connected to the air inlet of the next-stage turbine. The air outlet of the high-pressure gas storage chamber 4 is connected to the air inlet of the first reheater, and the air inlet of the first-stage turbine is connected to the air outlet of the first reheater.

[0089] The inlet of each reheater is connected to the outlet of the high-temperature water pump 102, and the inlet of the high-temperature water pump 102 is connected to the outlet of the high-temperature water tank 101; the outlet of each reheater is connected to the inlet of the low-temperature water tank 91. The fifth valve 41 is located between the outlet of the high-pressure gas storage chamber 4 and the inlet of the first reheater, and the sixth valve 51 is located between the outlet of the high-temperature water pump 102 and the inlets of all reheaters.

[0090] The number of turbine stages and reheaters in the energy storage expansion heating subsystem 5 can be adjusted according to actual needs, such as... Figure 4 As shown, for example, the multi-stage turbine in series includes a high-pressure turbine 53, a medium-pressure turbine 55, and a low-pressure turbine 57. A high-pressure reheater 52 is provided between the high-pressure gas storage chamber 4 and the high-pressure turbine 53, a medium-pressure reheater 54 is provided between the high-pressure turbine 53 and the medium-pressure turbine 55, and a low-pressure reheater 56 is provided between the medium-pressure turbine 55 and the low-pressure turbine 57.

[0091] During peak electricity consumption periods, the sixth valve 51 opens, and the energy storage expansion and heating subsystem 5 begins operation. At this time, the fifth valve 41 opens, and the high-pressure air stored in the high-pressure air chamber 4 first enters the high-pressure reheater 52, where it is heated by pressurized water pumped from the high-temperature water tank 101. The heated high-temperature, high-pressure air then enters the high-pressure turbine 53 for its first expansion, driving the first generator 58 to generate electricity for the load. The expanded medium-pressure air then enters the medium-pressure reheater 54, where it exchanges heat again with the pressurized water pumped from the high-temperature water tank 101, causing the air temperature to rise again. The heated high-temperature, medium-pressure air then enters the medium-pressure turbine 55 for its second expansion, driving the first generator 58 to generate electricity. The low-pressure air, after its second expansion, enters the low-pressure reheater 56, where it is heated a final time by pressurized water pumped from the high-temperature water tank 101. The heated high-temperature, low-pressure air then enters the low-pressure turbine 57 for its third expansion, driving the first generator 58 to generate electricity, ultimately completing the power output. Meanwhile, pressurized water stored in high-temperature water tank 101 is pumped by high-temperature water pump 102 to high, medium, and low-pressure reheaters 56, where it releases heat to preheat compressed air. Subsequently, the cooled pressurized water flows into low-temperature water tank 91 for storage.

[0092] like Figure 1 and Figure 5 As shown, for example, the organic Rankine cycle power generation system 6 includes a seventh valve 61, a second evaporator 62, an expander 63, a second generator 64, a second condenser 65, a working fluid pump 66, an eighth valve 67, a cooling water pump 68, and a cooling tower 69.

[0093] The inlet of the second evaporator 62 is connected to the outlet of the high-temperature water pump 102, and the outlet of the second evaporator 62 is connected to the inlet of the low-temperature water tank 91. The heat exchange medium outlet of the second evaporator 62 is connected to the heat exchange medium inlet of the expander 63, and the heat exchange medium outlet of the expander 63 is connected to the heat exchange medium inlet of the second condenser 65. The heat exchange medium outlet of the second condenser 65 is sequentially connected to the working fluid pump 66 and the heat exchange medium inlet of the second evaporator 62. The expander 63 is driven by the second generator 64 and is used to drive the second generator 64 to generate electricity.

[0094] The inlet of the second condenser 65 is connected to the outlet of the cooling water pump 68, the inlet of the cooling water pump 68 is connected to the outlet of the cooling tower 69, and the inlet of the cooling tower 69 is connected to the outlet of the second condenser 65; the seventh valve 61 is located between the inlet of the second evaporator 62 and the outlet of the high-temperature water pump 102, and the eighth valve 67 is located between the inlet of the second condenser 65 and the outlet of the cooling water pump 68.

[0095] During peak electricity consumption periods, valves 61 and 67 open, initiating the organic Rankine cycle power generation system 6. The organic working fluid, driven by pump 66, first flows into the second evaporator 62, absorbing heat from the pressurized water pumped from the high-temperature tank 101, raising its temperature. The high-temperature working fluid then enters the expander 63 for expansion, driving the second generator 64 to output stable electrical energy. Subsequently, the expanded working fluid enters the second condenser 65, where it exchanges heat with cooling water drawn from the cooling tower 69 by pump 68, cooling down and completing the organic Rankine cycle. Simultaneously, the pressurized water stored in the high-temperature tank 101 is pumped to the second evaporator 62 by pump 102, releasing heat to evaporate the organic working fluid. The cooled pressurized water then flows into the low-temperature tank 91 for storage.

[0096] like Figure 1 and Figure 6 As shown, for example, the absorption refrigeration subsystem 7 includes a ninth valve 71, a generator 72, a solution heat exchanger 73, a solution pump 74, a second throttle valve 75, an absorber 76, a third condenser 77, a third throttle valve 78, and a third evaporator 79.

[0097] The inlet of generator 72 is connected to the outlet of high-temperature water pump 102, the outlet of generator 72 is connected to the inlet of low-temperature water tank 91, the heat exchange medium inlet of generator 72 is connected to the first outlet of solution heat exchanger 73, the heat exchange medium outlet of generator 72 is connected to the first inlet of solution heat exchanger 73, and the steam outlet of generator 72 is connected to the steam inlet of third condenser 77.

[0098] The second inlet of the solution heat exchanger 73 is connected to the outlet of the solution pump 74, the inlet of the solution pump 74 is connected to the heat exchange medium outlet of the absorber 76, and the second outlet of the solution heat exchanger 73 is connected to the heat exchange medium inlet of the absorber 76 through the second throttle valve 75; the outlet of the third condenser 77 is connected to the inlet of the third evaporator 79 through the third throttle valve 78, and the steam outlet of the third evaporator 79 is connected to the air inlet of the absorber 76.

[0099] The ninth valve 71 is located between the inlet of the generator 72 and the outlet of the high-temperature water pump 102. The cooling water inlet and outlet of the third condenser 77 are connected to the external cooling water pipeline. The cooling water inlet and outlet of the third evaporator 79 are connected to the external cooling water pipeline. The cooling water inlet and outlet of the absorber 76 are connected to the external cooling water pipeline.

[0100] When users in buildings surrounding data center 11 require cooling, valve 71 opens, and the absorption cooling subsystem 7 begins operation. Solution pump 74 first pumps a dilute lithium bromide solution from absorber 76 into generator 72. Generator 72 uses the heat from pressurized water pumped from high-temperature water tank 101 to heat the dilute lithium bromide solution, causing the refrigerant water to evaporate and generate high-temperature, high-pressure water vapor and a concentrated lithium bromide solution. The concentrated solution passes through solution heat exchanger 73, exchanges heat with the dilute lithium bromide solution pumped from absorber 76, and then enters absorber 76 after pressure reduction via second throttle valve 75.

[0101] High-temperature, high-pressure water vapor enters the third condenser 77, where it condenses into high-pressure liquid water through heat exchange with the cooling water. The high-pressure liquid water then passes through the third throttle valve 78 to reduce pressure and enter the third evaporator 79. In the third evaporator 79, the low-pressure liquid water evaporates, absorbing heat from the chilled water and producing a cooling effect, providing the user with the required cooling capacity.

[0102] The evaporated low-pressure water vapor returns to absorber 76, where it comes into contact with and is absorbed by the concentrated lithium bromide solution, forming a dilute lithium bromide solution. During this process, the absorption of water vapor releases a large amount of heat. To maintain the temperature of absorber 76 within a suitable range, this heat needs to be removed by cooling water. Simultaneously, the dilute lithium bromide solution is pumped back into generator 72 by solution pump 74, beginning a new cycle.

[0103] like Figure 1 As shown, for example, the heating subsystem 8 includes a tenth valve 81, a hot water pump 82, an eleventh valve 83, and a heating heat exchanger 84. The inlet of the heating heat exchanger 84 is connected to the outlet of the high-temperature water pump 102, the outlet of the heating heat exchanger 84 is connected to the inlet of the low-temperature water tank 91, the heat exchange medium inlet of the heating heat exchanger 84 is connected to the outlet of the hot water pump 82, the inlet of the hot water pump 82 is connected to the outlet of the heating network, and the heat exchange medium outlet of the heating heat exchanger 84 is connected to the inlet of the heating network.

[0104] The tenth valve 81 is located between the inlet of the heat exchanger 84 and the outlet of the high-temperature water pump 102, and the eleventh valve 83 is located between the heat exchange medium inlet of the heat exchanger 84 and the outlet of the hot water pump 82.

[0105] When users in buildings surrounding data center 11 have heating needs, valves 81 (tenth) and 83 (eleventh) open, and the heating subsystem 8 begins operation. Pressurized water stored in high-temperature water tank 101 is pumped by high-temperature water pump 102 to the heating heat exchanger 84. The high-temperature pressurized water releases heat through heat exchange in the heat exchanger 84, transferring its thermal energy to the working fluid in the heating system. After being heated by the heat exchanger 84, the working fluid in the heating system reaches a higher temperature and flows to the heating network of data center 11 and surrounding buildings, providing the required heat to users.

[0106] This invention helps alleviate the urban heat island effect by recovering waste heat from the liquid-cooled data center 11 instead of directly releasing it into the atmosphere. Simultaneously, the introduction of compressed air energy storage effectively addresses the issue of output volatility from renewable energy sources such as solar and wind power, promoting the application of renewable energy in the data center 11 and driving the development of green data centers.

[0107] During off-peak electricity demand periods, this invention utilizes off-peak electricity to operate the energy storage compression cooling subsystem 3, generating compression heat and storing it in a high-temperature water tank 101. During peak electricity demand periods, the energy storage expansion heating subsystem 5 and the organic Rankine cycle power generation system 6 convert the stored heat energy in the high-temperature water tank 101 into electrical energy to power the data center 11. Therefore, this system can reduce the electricity costs of the data center 11 during peak demand periods. Furthermore, this system can also serve as a backup power source for the data center 11, ensuring its uninterrupted and safe operation.

[0108] The heat energy generated by the heat pump subsystem 2 and the energy storage compression cooling subsystem 3 of this invention is jointly stored in a high-temperature water tank 101. The heat energy in the high-temperature water tank 101 is distributed to each subsystem as needed, improving the system's energy utilization efficiency. Furthermore, since the heat pump subsystem 2 operates 24 / 7, continuously supplying heat to the high-temperature water tank 101, it ensures that the energy storage expansion heating subsystem 5 has a sufficient supply of hot water at all times. This avoids system performance degradation or operational interruptions caused by insufficient hot water supply, significantly improving the system's stability and reliability.

[0109] This invention enables flexible switching between power generation, cooling, and heating modes according to actual needs. Through the coordinated operation of the energy storage expansion heating subsystem 5, the organic Rankine cycle power generation system 6, the absorption cooling subsystem 7, and the heating subsystem 8, the system can provide the required energy services in different usage scenarios, improving the system's adaptability and flexibility.

[0110] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A combined energy system for a green liquid-cooled data center, characterized in that, include: The liquid cooling subsystem is used to absorb heat from the data center and cool it down. The heat pump subsystem is used to absorb the waste heat generated by the data center, and then use the waste heat to heat the water in the low-temperature water tank and transport it to the high-temperature water tank for storage. The energy storage compression cooling subsystem is used to heat the water in the low-temperature water tank by using the heat of the compressed air and then transport it to the high-temperature water tank for storage, and to store the compressed air in the high-pressure air storage chamber. The energy storage expansion heating subsystem is used to heat the compressed air released from the high-pressure air storage chamber using the heat of the hot water in the high-temperature water tank. The heated compressed air then generates electricity and transports the water that has absorbed the heat to the low-temperature water tank. When an electricity supply is required, the energy storage expansion heating subsystem uses the compressed air released from the high-pressure air storage chamber and the heat energy in the high-temperature water tank to generate electricity for use. The organic Rankine cycle power generation system is used to convert the heat of hot water in a high-temperature water tank into electrical energy and to transport the water with absorbed heat to a low-temperature water tank. During peak electricity hours, the organic Rankine cycle power generation system absorbs the heat energy in the high-temperature water tank through an organic working fluid and drives an expander to generate electricity, and the heat energy is converted into electrical energy output. The absorption refrigeration subsystem is used to convert the heat of hot water in the high-temperature water tank into cold energy to supply cooling to users, and to transport the water whose heat has been absorbed to the low-temperature water tank. The heating subsystem is used to supply heat to the heating network using the heat energy in the high-temperature water tank and to transport the water that has absorbed the heat to the low-temperature water tank.

2. The combined energy system for a green liquid-cooled data center according to claim 1, characterized in that, The liquid cooling subsystem includes a coolant pump and a cooling heat exchanger; The inlet of the coolant pump is connected to the outlet of the data center, the outlet of the coolant pump is connected to the inlet of the cooling heat exchanger and the coolant inlet of the heat pump subsystem, and the outlet of the cooling heat exchanger and the coolant outlet of the heat pump subsystem are both connected to the inlet of the data center.

3. The combined energy system for a green liquid-cooled data center according to claim 2, characterized in that, The liquid cooling subsystem also includes a fan, a first valve, and a second valve; The fan is located on one side of the cooling heat exchanger, the first valve is located between the outlet of the coolant pump and the inlet of the cooling heat exchanger, and the second valve is located between the outlet of the coolant pump and the coolant inlet of the heat pump subsystem.

4. The combined energy system for a green liquid-cooled data center according to claim 1, characterized in that, The heat pump subsystem includes a first evaporator, a compressor, a first motor, a first condenser, and a first throttling valve; The output shaft of the first motor is connected to the compressor drive; the air inlet of the compressor is connected to the heat exchange medium outlet of the first evaporator; the air outlet of the compressor is connected to the heat exchange medium inlet of the first condenser; the heat exchange medium outlet of the first condenser is sequentially connected to the first throttling valve and the heat exchange medium inlet of the first evaporator; the water inlet of the first condenser is sequentially connected to the low-temperature water pump and the water outlet of the low-temperature water tank; and the water outlet of the first condenser is connected to the water inlet of the high-temperature water tank.

5. The combined energy system for a green liquid-cooled data center according to claim 1, characterized in that, The energy storage compression cooling subsystem includes a multi-stage compressor and a second motor connected in series; The output shaft of the second motor is connected to the multi-stage air compressor drive; an intercooler is provided between two adjacent air compressor stages and between the last air compressor stage and the high-pressure air storage chamber; the air inlet of the intercooler between two adjacent air compressor stages is connected to the air outlet of the previous air compressor stage, the air outlet of the intercooler between two adjacent air compressor stages is connected to the air inlet of the next air compressor stage, the air outlet of the last air compressor stage is connected to the air inlet of the last intercooler stage, and the air inlet of the high-pressure air storage chamber is connected to the air outlet of the last intercooler stage. The inlet of each intercooler is connected in sequence to the outlet of the low-temperature water pump and the low-temperature water tank, and the outlet of each intercooler is connected to the inlet of the high-temperature water tank.

6. The combined energy system for a green liquid-cooled data center according to claim 1, characterized in that, The energy storage expansion heating subsystem includes a multi-stage turbine connected in series and a first generator; The multi-stage turbines connected in series are driven by the first generator; reheaters are provided between the high-pressure gas storage chamber and the first-stage turbine, as well as between two adjacent turbine stages; the air inlet of the reheater between two adjacent turbine stages is connected to the air outlet of the previous turbine stage, the air outlet of the reheater between two adjacent turbine stages is connected to the air inlet of the next turbine stage, the air outlet of the high-pressure gas storage chamber is connected to the air inlet of the first reheater, and the air inlet of the first-stage turbine is connected to the air outlet of the first reheater. The inlet of each reheater is connected in sequence to the high-temperature water pump and the outlet of the high-temperature water tank; the outlet of each reheater is connected to the inlet of the low-temperature water tank.

7. The combined energy system for a green liquid-cooled data center according to claim 1, characterized in that, The organic Rankine cycle power generation system includes a second evaporator, an expander, a second generator, a second condenser, a working fluid pump, a cooling water pump, and a cooling tower; The inlet of the second evaporator is connected in sequence to the high-temperature water pump and the outlet of the high-temperature water tank; the outlet of the second evaporator is connected to the inlet of the low-temperature water tank; the heat exchange medium outlet of the second evaporator is connected to the heat exchange medium inlet of the expander; the heat exchange medium outlet of the expander is connected to the heat exchange medium inlet of the second condenser; and the heat exchange medium outlet of the second condenser is connected in sequence to the working fluid pump and the heat exchange medium inlet of the second evaporator. The expander is driven by the second generator. The inlet of the second condenser is connected to the outlet of the cooling water pump, the inlet of the cooling water pump is connected to the outlet of the cooling tower, and the inlet of the cooling tower is connected to the outlet of the second condenser.

8. The combined energy system for a green liquid-cooled data center according to claim 1, characterized in that, The absorption refrigeration subsystem includes a generator, a solution heat exchanger, a solution pump, a second throttle valve, an absorber, a third condenser, a third throttle valve, and a third evaporator; The generator's inlet is connected to the high-temperature water pump and the high-temperature water tank in sequence; the generator's outlet is connected to the low-temperature water tank's inlet; the generator's heat exchange medium inlet is connected to the first outlet of the solution heat exchanger; the generator's heat exchange medium outlet is connected to the first inlet of the solution heat exchanger; and the generator's steam outlet is connected to the steam inlet of the third condenser. The second inlet of the solution heat exchanger is connected to the outlet of the solution pump, the inlet of the solution pump is connected to the heat exchange medium outlet of the absorber, and the second outlet of the solution heat exchanger is connected to the heat exchange medium inlet of the absorber through the second throttle valve; the outlet of the third condenser is connected to the inlet of the third evaporator through the third throttle valve, and the steam outlet of the third evaporator is connected to the air inlet of the absorber.

9. The combined energy system for a green liquid-cooled data center according to any one of claims 1-8, characterized in that, The heating subsystem includes a hot water pump and a heat exchanger. The inlet of the heat exchanger is connected in sequence to the outlet of the high-temperature water pump and the high-temperature water tank; the outlet of the heat exchanger is connected to the inlet of the low-temperature water tank; the heat exchange medium inlet of the heat exchanger is connected to the outlet of the hot water pump; the inlet of the hot water pump is connected to the outlet of the heating network; and the heat exchange medium outlet of the heat exchanger is connected to the inlet of the heating network.

10. The combined energy system for a green liquid-cooled data center according to claim 4, characterized in that, The heat pump subsystem also includes a third valve, which is located between the inlet of the first condenser and the outlet of the cryogenic water pump.

11. The combined energy system for a green liquid-cooled data center according to claim 5, characterized in that, The energy storage compression cooling subsystem also includes a fourth valve, which is located between the inlet of all intercoolers and the outlet of the cryogenic water pump.

12. The combined energy system for a green liquid-cooled data center according to claim 6, characterized in that, The energy storage expansion heating subsystem also includes a fifth valve and a sixth valve. The fifth valve is located between the outlet of the high-pressure gas storage chamber and the inlet of the first reheater, and the sixth valve is located between the outlet of the high-temperature water pump and the inlets of all reheaters.

13. The combined energy system for a green liquid-cooled data center according to claim 7, characterized in that, The organic Rankine cycle power generation system includes a seventh valve and an eighth valve. The seventh valve is located between the inlet of the second evaporator and the outlet of the high-temperature water pump, and the eighth valve is located between the inlet of the second condenser and the outlet of the cooling water pump.

14. The combined energy system for a green liquid-cooled data center according to claim 8, characterized in that, The absorption refrigeration subsystem includes a ninth valve, which is located between the inlet of the generator and the outlet of the high-temperature water pump.

15. The combined energy system for a green liquid-cooled data center according to claim 9, characterized in that, The heating subsystem includes a tenth valve and an eleventh valve. The tenth valve is located between the inlet of the heating heat exchanger and the outlet of the high-temperature water pump, and the eleventh valve is located between the heat exchange medium inlet of the heating heat exchanger and the outlet of the hot water pump.

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