Data center waste heat recovery heating system based on solar photovoltaic photo-thermal

Abstract

The invention discloses a data center waste heat recovery heating system based on solar photovoltaic photo-thermal, and relates to the technical field of waste heat recovery heating. The system comprises a heat storage water tank, one side of the heat storage water tank is connected with a photovoltaic photo-thermal unit through a circulating pipeline, the other side of the heat storage water tank is connected with a cooling liquid distribution unit through a circulating pipeline, and the cooling liquid distribution unit is connected with a heat dissipation server unit through a circulating pipeline; wherein the photovoltaic photo-thermal unit is used for supplying power and heat to the heat storage water tank; the heat storage water tank is connected with a heat pump unit through a circulating pipeline and used for providing a heat source for the heat pump unit. According to the system, the immersed liquid cooling heat dissipation server unit, the photovoltaic photo-thermal unit and the heat pump unit are combined and innovated, the system can adjust a control valve according to different weather and transformer operation loads to achieve multiple heating modes, the stability of the heating system is improved, low-carbon operation of the data center heating system is achieved, and the service life of the data center heating system is prolonged. And the purposes of energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery and heating, and specifically to a data center waste heat recovery and heating system based on solar photovoltaic and thermal energy. Background Art

[0002] With the rapid development of the digital economy, data center energy consumption is becoming increasingly prominent. Traditional air-cooling solutions draw in air below 16°C for heat exchange with server chassis, then release low-grade waste heat below 50°C directly into the atmosphere to maintain a normal operating temperature of 18-27°C. This results in significant energy waste and exacerbates global warming. Furthermore, data centers also contain artificial areas that require heat. Traditional boilers or electric heating systems undoubtedly increase data center operation and maintenance costs, further increasing energy consumption. Therefore, combining the heat dissipation of data center servers with clean energy sources such as solar energy and integrating them with heat pump technology and energy storage systems can effectively supply heat to artificial areas requiring heat, such as domestic hot water and winter heating. Furthermore, scientifically storing and redistributing energy can not only improve data center energy efficiency and reduce power usage effectiveness (PUE), but also increase the utilization of renewable energy throughout the system's operating lifecycle.

[0003] However, the immersion liquid cooling has the lowest PUE among existing data center heat dissipation methods. Using coolants such as propylene glycol solution can control the system PUE between 1.01 and 1.2. However, the energy consumed by high-temperature coolant (60℃-65℃) heat dissipation is still not negligible. If it is utilized, the energy expenditure of related parts can be reduced, which can further improve the system energy utilization rate and reduce the PUE of the data center. Although solar energy technology is a clean energy solution, a single photovoltaic system has the problem that the power generation efficiency decreases with increasing temperature and the operation throughout the year is greatly affected by seasonal and other weather factors. The utilization rate of the solar thermal system is insufficient in the non-heating season. For this reason, the present invention proposes a data center waste heat recovery heating system based on solar photovoltaic and thermal energy. Summary of the Invention

[0004] The purpose of the present invention is to provide a data center waste heat recovery heating system based on solar photovoltaic thermal energy, which combines solar energy with the data center waste heat to heat the water storage tank, thereby increasing the internal water temperature as a heating carrier. At the same time, a heat pump is also used as an auxiliary heating method, which greatly improves the energy utilization efficiency while improving the heating stability of the system.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a data center waste heat recovery heating system based on solar photovoltaic and thermal energy, comprising a heat storage tank, one side of which is connected to a photovoltaic and thermal energy unit via a circulation pipe, and the other side of which is connected to a coolant distribution unit via a circulation pipe, and the coolant distribution unit is connected to a heat dissipation server unit via a circulation pipe;

[0006] The photovoltaic thermal unit is used to supply power and heat to the hot water storage tank;

[0007] The hot water storage tank is connected to a heat pump unit via a circulation pipe. The hot water storage tank is used to provide a heat source for the heat pump unit. The heat pump unit is connected to a data center building via a circulation pipe, and the hot water storage tank is also interconnected with the data center building via the circulation pipe.

[0008] Furthermore, water pump 1 and water pump 2 are respectively provided between the coolant distribution unit and the hot water storage tank and the heat dissipation server unit.

[0009] Furthermore, the photovoltaic thermal unit includes a photovoltaic panel, a collector is installed on the side wall of the photovoltaic panel, a heat collecting pipe is installed in the heat collector, the heat collector circulates through the heat collecting pipe and the hot water storage tank, and an insulation layer is installed on the side wall of the heat collector.

[0010] Furthermore, the heat pump unit includes an evaporator, a compressor is installed at one end of the evaporator, a condenser is installed on one side of the compressor, the condenser and the evaporator are interconnected through a circulation pipe, and a throttle valve is provided between the condenser and the evaporator.

[0011] Furthermore, the evaporator is circulated through the heat storage tank via a circulation pipe, and a valve 1 is provided between the two.

[0012] Furthermore, the condenser is connected to the data center building via a circulation pipe, and the circulation pipe is made of copper or stainless steel.

[0013] Furthermore, a water pump four and a valve three are provided between the condenser and the data center building, and a valve two is provided between the data center building and the hot water storage tank.

[0014] Furthermore, a fan coil unit is installed in the data center building, and the hot water transported from the heat storage tank to the data center building is used to heat the data center building through the fan coil unit.

[0015] Furthermore, the photovoltaic panel is electrically connected to an inverter, the inverter is electrically connected to a battery, and the battery is electrically connected to the compressor, water pump 1, water pump 2, water pump 3, and water pump 4.

[0016] Furthermore, the coolant distribution unit includes a box body, a plate heat exchanger is installed inside the box body, and a coolant circulation pipeline and a cooling water circulation pipeline are opened inside the plate heat exchanger.

[0017] The present invention has at least the following beneficial effects:

[0018] (1) The present invention combines photovoltaic thermal units and heat pump units to construct a data center waste heat recovery and utilization system, which not only solves the problem of difficulty in recovering and utilizing waste heat in data centers, but also reduces energy waste and thermal pollution to the environment.

[0019] (2) The present invention can adjust the valve according to different weather conditions and data center operating loads to achieve multiple heating modes, thereby improving the stability of the heating system operation.

[0020] (3) The present invention utilizes solar thermal photovoltaic technology to not only supplement heat for the heating system, but also to supply power to electrical equipment such as motors and water pumps in the data center, thereby achieving efficient utilization of renewable energy.

[0021] (4) The present invention utilizes a heat pump unit as one of the heating modes to convert low-grade thermal energy into high-grade thermal energy, thereby achieving efficient cogeneration of heat and power in the heating system.

[0022] (5) The present invention uses circulating water as a heat exchange medium, which ensures the indoor air quality of the substation building compared to the traditional method of using circulating air as a heat exchange medium.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the waste heat recovery heating system of the present invention;

[0025] Figure 2 is a three-dimensional schematic diagram of a photovoltaic thermal unit of the present invention;

[0026] Figure 3 It is a three-dimensional schematic diagram of the coolant distribution unit of the present invention.

[0027] Reference numerals:

[0028] 1. Photovoltaic thermal unit; 101. Photovoltaic panel; 102. Collector; 103. Insulation layer; 104. Heat collection pipe; 2. Inverter; 3. Battery; 4. Heat storage tank; 5. Coolant distribution unit; 501. Tank; 502. Plate heat exchanger; 503. Coolant circulation pipeline; 504. Cooling water circulation pipeline; 6. Cooling server unit; 7. Data center building; 8. Evaporator; 9. Condenser; 10. Throttle valve; 11. Compressor; 12. Water pump 1; 13. Water pump 2; 14. Water pump 3; 15. Water pump 4; 16. Valve 1; 17. Valve 2; 18. Valve 3. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0030] See also Figure 1-Figure 3 The present invention provides a technical solution: a data center waste heat recovery heating system based on solar photovoltaic thermal energy, comprising a hot water storage tank 4, one side of which is connected to a photovoltaic thermal unit 1 through a circulation pipe, and the other side of the hot water storage tank 4 is connected to a coolant distribution unit 5 through a circulation pipe, and the coolant distribution unit 5 is connected to a heat dissipation server unit 6 through a circulation pipe;

[0031] The photovoltaic thermal unit 1 is used to supply power and heat to the hot water storage tank 4;

[0032] The hot water storage tank 4 is connected to the heat pump unit through a circulation pipe. The hot water storage tank 4 is used to provide a heat source for the heat pump unit. The heat pump unit is connected to the data center building 7 through a circulation pipe, and the hot water storage tank 4 is also interconnected with the data center building 7 through the circulation pipe.

[0033] According to the technical solution of this embodiment, water pump 1 12 and water pump 2 13 are respectively provided between the coolant distribution unit 5 and the heat storage tank 4 and the heat dissipation server unit 6. The heat dissipation server unit 6 is an immersion liquid-cooled heat dissipation server unit 6, which completely immerses the entire server or heat-generating components in insulating, low-boiling point or high-boiling point coolant, and exchanges heat through direct contact between the liquid and the heat-generating components. Depending on whether the coolant undergoes phase change during the heat dissipation process, it can be divided into single-phase immersion type and two-phase immersion type.

[0034] According to the technical solution of this embodiment, there is a high-temperature coolant of 60°C-65°C in the heat dissipation server unit 6. First, start the water pump 2 13 to transport the high-temperature propylene glycol solution to the coolant distribution unit 5, and then start the water pump 12 to transport the water in the hot water storage tank 4 to the coolant distribution unit 5. Heat exchange can be carried out between the propylene glycol solution and the water, so that the waste heat of the heat dissipation server unit 6 can be used to heat the water in the hot water storage tank 4.

[0035] According to the technical solution of this embodiment, the photovoltaic thermal unit 1 includes a photovoltaic panel 101, a collector 102 is installed on the side wall of the photovoltaic panel 101, a heat collecting pipe 104 is installed in the heat collector 102, the heat collector 102 circulates through the heat collecting pipe 104 and the hot water storage tank 4, and an insulation layer 103 is installed on the side wall of the heat collector 102. The photovoltaic panel 101 can be used to convert solar energy into electrical energy to power the electrical equipment in the system, thereby realizing low-carbon operation of the heating system of the data center building 7.

[0036] A collector 102 is installed on the back of the photovoltaic panel 101. The collector 102 circulates through the heat storage tank 4 through the heat collection pipe 104. The water in the heat storage tank 4 can be transported to the collector 102 through the heat collection pipe 104. The circulating water in the heat storage tank 4 is then heated by the absorbed solar heat, which is convenient for reducing energy consumption while improving the stability of the water supply temperature of the heat storage tank 4. The preset water supply temperature of the heat storage tank 4 is 60°C.

[0037] According to the technical solution of this embodiment, the heat pump unit includes an evaporator 8, a compressor 11 is installed at one end of the evaporator 8, a condenser 9 is installed on one side of the compressor 11, and the condenser 9 and the evaporator 8 are connected to each other through a circulation pipe, and a throttle valve 10 is provided between the condenser 9 and the evaporator 8;

[0038] The refrigerant absorbs heat on the evaporator 8 side and becomes gaseous, then flows out of the compressor 11 and enters the condenser 9. There are many small pipes inside the condenser 9. The refrigerant flows through these pipes, and the external cooling water or air flows over the surface of the condenser 9, changing the refrigerant from gas to liquid, releasing a large amount of heat to heat the circulating water.

[0039] According to the technical solution of this embodiment, the evaporator 8 is circulated through the heat storage tank 4 through a circulation pipe, and a valve 16 is provided between the two. The valve 16 can be used to control the communication between the heat storage tank 4 and the evaporator 8.

[0040] According to the technical solution of this embodiment, the condenser 9 is connected to the data center building 7 via a circulation pipe, and the circulation pipes in the system are all made of copper or stainless steel.

[0041] According to the technical solution of this embodiment, a water pump 4 15 and a valve 3 18 are provided between the condenser 9 and the data center building 7, and a valve 2 17 is provided between the data center building 7 and the hot water storage tank 4. Starting the water pump 4 15 and the valve 3 18 can allow water to circulate between the data center building 7 and the condenser 9, thereby facilitating heating of the data center building 77.

[0042] It should be noted that a fan coil unit is installed in the data center building 7 , and the hot water transported from the heat storage tank 4 to the data center building 7 is used to heat the data center building 7 through the fan coil unit.

[0043] A fan coil unit is referred to as a fan coil. It is one of the terminal devices of the air conditioning system, consisting of a small fan, an electric motor and a coil (air heat exchanger). When chilled water or hot water flows through the coil tube, it exchanges heat with the air outside the tube, so that the air is cooled, dehumidified or heated to adjust the air parameters in the substation room.

[0044] In this embodiment, the data center building 7 is heated in two modes, including solar heating mode and heat pump heating mode:

[0045] When the temperature of the hot water in the hot water storage tank 4 is low and the solar radiation intensity is strong, the solar heating mode is adopted. The photovoltaic thermal unit 1 is first used to heat the water in the hot water storage tank 4. After heating to the specified temperature, valve one 16 and valve three 18 are closed, valve two 17 is opened, and water pump three 14 is started. The hot water in the hot water storage tank 4 can be directly transported to the fan coil of the data center building 77 for heating. When the temperature of the hot water in the hot water storage tank 4 is low and the solar radiation intensity is weak, the heat pump heating mode is adopted. At this time, valve one 16 and valve three 18 are opened, and valve three 14 is closed. Valve 2 17, then start water pump 3 14 to transport the water in the hot water tank 4 to the evaporator 8, and then use the refrigerant on the evaporator 8 side to absorb heat and turn into gas. Then the refrigerant flows out of the compressor 11 and enters the condenser 9. There are many small pipes inside the condenser 9. The refrigerant flows through these pipes, and the external cooling water or air flows over the surface of the condenser 9, changing the refrigerant from gas to liquid, releasing a large amount of heat to heat the circulating water, and then start water pump 4 15 to transport the heated circulating water to the fan coil unit of the data center building 7 for heating.

[0046] According to the technical solution of this embodiment, the photovoltaic panel 101 is electrically connected to the inverter 2, the inverter 2 is electrically connected to the battery 3, and the battery 3 is electrically connected to the compressor 11, water pump 1 12, water pump 2 13, water pump 3 14, and water pump 4 15. It should be noted that the electric energy converted by the photovoltaic panel 101 will first be stored in the battery 3, and the battery 3 will be used to power the electrical equipment, and the inverter 2 is set to facilitate the regulation of voltage and current.

[0047] According to the technical solution of this embodiment, the cooling liquid distribution unit 5 includes a box body 501, a plate heat exchanger 502 is installed inside the box body 501, a cooling liquid circulation pipeline 503 and a cooling water circulation pipeline 504 are opened inside the plate heat exchanger 502, the cooling water circulation pipeline 504 is connected to the circulation pipeline of the hot water storage tank 4, and the cooling liquid circulation pipeline 503 is connected to the circulation pipeline of the heat dissipation server unit 6.

[0048] It should be noted that the photovoltaic thermal unit 1 is installed on the roof of the data center building 7 to facilitate receiving sunlight and performing energy conversion.

[0049] The use principle and process of the present invention:

[0050] When heating is required in the data center building 7, when the hot water temperature in the hot water storage tank 4 is low and the solar radiation intensity is weak, the heat pump heating mode is adopted. At this time, valve 16 and valve 3 18 are opened, valve 2 17 is closed, and then water pump 3 143 is started to transport the water in the hot water storage tank 4 to the evaporator 8. Then, the refrigerant on the evaporator 8 absorbs heat and turns into gas. Then, the refrigerant flows out of the compressor 11 and enters the condenser 9. There are many small pipes inside the condenser 9. The refrigerant flows through these pipes, and the external cooling water or air flows over the surface of the condenser 9, turning the refrigerant from gas to liquid. Liquid, releasing a large amount of heat to heat the circulating water, and then starting the water pump four 15 to transport the heated circulating water to the fan coil unit of the data center building 7, which can provide heating; when the hot water temperature in the hot water storage tank 4 is low and the solar radiation intensity is strong, the solar heating mode is adopted, first using the photovoltaic unit to heat the water in the hot water storage tank 4, after heating to the specified temperature, close valve one 16 and valve three 18, open valve two 17, and start the water pump three 14, so that the hot water in the hot water storage tank 4 can be directly transported to the fan coil unit of the data center building 7, which can provide heating.

[0051] To sum up, this application combines the immersion liquid cooling server unit 6, photovoltaic thermal unit 1 and heat pump unit for innovation. The system can adjust the control valve according to different weather and transformer operating load to achieve multiple heating modes, improve the stability of the heating system, and realize the low-carbon operation of the data center heating system, achieving the purpose of energy conservation and emission reduction.

[0052] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0053] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on", "installed on", "fixed on" or "set on" another element, it can be directly on the other element or there can be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0054] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0055] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A data center waste heat recovery heating system based on solar photovoltaic thermal energy, characterized by: It comprises a heat storage tank (4), one side of the heat storage tank (4) is connected to a photovoltaic thermal unit (1) via a circulation pipeline, the other side of the heat storage tank (4) is connected to a cooling liquid distribution unit (5) via a circulation pipeline, and the cooling liquid distribution unit (5) is connected to a heat dissipation server unit (6) via a circulation pipeline; The photovoltaic thermal unit (1) is used to supply power and heat to the hot water storage tank (4); The hot water storage tank (4) is connected to a heat pump unit via a circulation pipeline. The hot water storage tank (4) is used to provide a heat source for the heat pump unit. The heat pump unit is connected to a data center building (7) via a circulation pipeline. The hot water storage tank (4) is also interconnected with the data center building (7) via the circulation pipeline.

2. The data center waste heat recovery heating system based on solar photovoltaic thermal energy according to claim 1 is characterized by: A water pump 1 (12) and a water pump 2 (13) are respectively provided between the cooling liquid distribution unit (5), the heat storage tank (4), and the heat dissipation server unit (6).

3. The data center waste heat recovery heating system based on solar photovoltaic thermal energy according to claim 2 is characterized by: The photovoltaic thermal unit (1) comprises a photovoltaic panel (101), a heat collector (102) is installed on the side wall of the photovoltaic panel (101), a heat collecting pipe (104) is installed in the heat collector (102), the heat collector (102) is circulated through the heat collecting pipe (104) and the hot water storage tank (4), and a heat insulation layer (103) is installed on the side wall of the heat collector (102).

4. The data center waste heat recovery heating system based on solar photovoltaic thermal energy according to claim 2 is characterized by: The heat pump unit comprises an evaporator (8), a compressor (11) is installed at one end of the evaporator (8), a condenser (9) is installed on one side of the compressor (11), and the condenser (9) and the evaporator (8) are interconnected through a circulation pipeline, and a throttle valve (10) is provided between the condenser (9) and the evaporator (8).

5. The data center waste heat recovery heating system based on solar photovoltaic thermal energy according to claim 4 is characterized by: The evaporator (8) is circulated through the heat storage tank (4) via a circulation pipe, and a valve (16) is provided between the two.

6. The data center waste heat recovery heating system based on solar photovoltaic thermal energy according to claim 5 is characterized by: The condenser (9) is connected to the data center building (7) via a circulation pipeline, and the circulation pipeline is made of copper or stainless steel.

7. The data center waste heat recovery heating system based on solar photovoltaic thermal energy according to claim 6 is characterized by: A water pump four (15) and a valve three (18) are provided between the condenser (9) and the data center building (7), and a valve two (17) is provided between the data center building (7) and the hot water storage tank (4).

8. The data center waste heat recovery heating system based on solar photovoltaic thermal energy according to claim 7 is characterized by: A fan coil unit is installed in the data center building (7), and hot water transported from the heat storage tank (4) to the data center building (7) is used to heat the data center building (7) through the fan coil unit.

9. The data center waste heat recovery heating system based on solar photovoltaic thermal energy according to claim 8 is characterized by: The photovoltaic panel (101) is electrically connected to an inverter (2), the inverter (2) is electrically connected to a battery (3), and the battery (3) is electrically connected to a compressor (11), a water pump 1 (12), a water pump 2 (13), a water pump 3 (14), and a water pump 4 (15).

10. The data center waste heat recovery heating system based on solar photovoltaic thermal energy according to claim 9 is characterized in that: The cooling liquid distribution unit (5) comprises a box (501), a plate heat exchanger (502) is installed inside the box (501), and a cooling liquid circulation pipeline (503) and a cooling water circulation pipeline (504) are opened inside the plate heat exchanger (502).

Images