Waste heat utilization system of data center

Abstract

The utility model discloses a data center waste heat utilization system. The other working end of a cold storage tank is connected with one working end of a corresponding AHU air conditioning unit in parallel; the other working end of the park terminal is connected with an external park environment pipe; the first control assembly is arranged on the path from the geothermal well to the corresponding AHU air conditioning unit through the ground source heat pump, the second control assembly is arranged on the path from the waste heat pump to the corresponding AHU air conditioning unit and the park terminal, and the third control assembly is arranged on the path from the cold storage tank to the corresponding AHU air conditioning unit. Through cooperative work of the geothermal well and the ground source heat pump, the geothermal energy and waste heat are utilized, and dependence on traditional energy is reduced. The waste heat pump enables waste heat of the data center to be recovered and reused. Real-time switching of the first control assembly, the second control assembly and the third control assembly enables the system to adjust the energy supply state according to actual requirements. Energy storage and energy release of the cold storage tank provide additional buffering capacity for the system so as to deal with emergencies or demand fluctuation.

Description

Technical Field

[0001] This application relates to the field of energy utilization technology, and in particular to a data center waste heat utilization system. Background Technology

[0002] In recent years, distributed energy systems in industrial parks have received increasing attention, and the self-built low-carbon energy supply systems (cooling, heating, and power supply) in industrial parks have gradually become a development trend.

[0003] Distributed energy systems are closer to users. Currently, the temperature requirements for heating equipment (fan coil units, floor radiant heating, etc.) in newly built buildings are basically below 60℃, which provides favorable conditions for the utilization of waste heat from data centers.

[0004] However, existing data centers generate waste heat year-round. If this waste heat is only utilized in winter, then the heat generated in other seasons (spring, summer, and autumn) will be wasted. Especially in the frigid northern regions, conventional heating methods such as gas-fired and coal-fired boilers have high carbon emissions, while conventional heat pump heating, such as air source heat pumps and multi-split systems, is inefficient in low-temperature environments. Using traditional ground source heat pumps to cool data centers is not economical compared to evaporative cooling technology, and traditional ground source heat pumps, when used solely to heat users, can also lead to geothermal imbalances. Utility Model Content

[0005] This application provides a data center waste heat utilization system, which aims to effectively utilize waste heat while distributing energy consumption to ensure overall economic benefits.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A data center waste heat utilization system includes a geothermal well, a ground source heat pump, a waste heat heat pump, a cold storage tank, a campus terminal, multiple AHU air conditioning units, a first control component, a second control component, and a third control component;

[0008] One working end of multiple AHU air conditioning units is connected to one working end of the corresponding ground source heat pump, one working end of the waste heat heat pump, and one working end of the cold storage tank.

[0009] The other working end of the ground source heat pump is connected to the output end of the geothermal well, and the input end of the geothermal well is connected to the external geothermal environment pipe.

[0010] The other working end of the waste heat heat pump and the working end of the ground source heat pump leading to the corresponding AHU air conditioning unit are both connected to the working end pipe of the park terminal.

[0011] The other working end of the cold storage tank is connected in parallel with one working end of the corresponding AHU air conditioning unit;

[0012] The other working end of the park terminal is connected to the external park environmental duct;

[0013] The first control component is located on the path from the geothermal well through the ground source heat pump to the corresponding AHU air conditioning unit, and can switch the power supply status of the ground source heat pump to the park terminal and the corresponding AHU air conditioning unit in real time.

[0014] The second control component is located on the paths from the two working ends of the waste heat pump to the corresponding AHU air conditioning unit and the park terminal, respectively, and can switch the energy supply status of the waste heat pump to the park terminal and the corresponding AHU air conditioning unit in real time.

[0015] The third control component is located on the path from the cold storage tank to the corresponding AHU air conditioning unit, and can switch the power supply status of the cold storage tank to the AHU air conditioning unit in real time.

[0016] Furthermore, the first control component includes a first water pump, a second water pump, a first plate heat exchanger, two sets of first valves, a fourth valve, a sixth valve, a seventh valve, and an eighth valve;

[0017] The first water pump is installed on the return water path from the ground source heat pump to the corresponding AHU air conditioning unit.

[0018] The second water pump is connected to the return water path from the geothermal well to the ground source heat pump;

[0019] The piping of the first plate heat exchanger is connected in parallel with the return water path and the supply water pipe of the ground source heat pump.

[0020] One set of first valves is connected to the path from the ground source heat pump to the corresponding AHU air conditioning unit, and another set of first valves is connected to the path from the cold storage tank to the AHU air conditioning unit.

[0021] The fourth valve is connected to the path from the ground source heat pump to the corresponding AHU air conditioning unit on the first plate heat exchanger.

[0022] The sixth valve is connected to the path from the ground source heat pump to the corresponding AHU air conditioning unit;

[0023] The seventh valve is connected to the path from the ground source heat pump to the geothermal well;

[0024] The eighth valve is connected to the path from the first plate heat exchanger to the geothermal well and then to the ground source heat pump.

[0025] Furthermore, the second control component includes a third water pump, a fourth water pump, a seventh water pump, a second valve, a third valve, a fifth valve, and an eleventh valve;

[0026] The third water pump is connected to the return water path of the waste heat pump and the AHU air conditioning unit.

[0027] The fourth water pump is connected to the return water path from the waste heat pump to the terminal of the park.

[0028] The seventh water pump is connected to the return water path from the park terminal to the ground source heat pump;

[0029] The second valve is connected to the path from the park terminal to the ground source heat pump and then to the corresponding AHU air conditioning unit.

[0030] The third valve is connected to the path from the waste heat heat pump to the AHU air conditioning unit;

[0031] The fifth valve is connected to the path from the waste heat heat pump at the park terminal to the corresponding AHU air conditioning unit;

[0032] The eleventh valve is connected to the path from the park terminal to the waste heat pump.

[0033] Furthermore, the third control component includes a second heat exchanger, a fifth water pump, and a sixth water pump;

[0034] The second plate heat exchanger is connected to the path from the cold storage tank to the AHU air conditioning unit;

[0035] The fifth water pump is connected to the return water path from the cold storage tank to the second plate heat exchanger;

[0036] The sixth water pump is connected to the return water path from the second plate heat exchanger to the AHU air conditioning unit.

[0037] Furthermore, this also includes cooling towers;

[0038] One working end of the cooling tower is connected to the external environment, while the other working end is connected to the path leading from the park terminal to the waste heat pump, which can compensate for the energy supply status of the waste heat pump and the ground source heat pump to the AHU air conditioning unit.

[0039] Furthermore, a ninth valve is installed on the path from the cooling tower to the geothermal well to compensate for the power supply status of the ground source heat pump to the corresponding AHU air conditioning unit.

[0040] A tenth valve is installed on the path from the cooling tower to the waste heat pump to compensate for the energy supply status of the waste heat pump to the AHU air conditioning unit.

[0041] Furthermore, the waste heat heat pump is a dual-condition component.

[0042] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0043] This application reduces reliance on traditional energy sources by utilizing geothermal energy and waste heat from data centers, eliminating the need for traditional air conditioning systems for heating and / or cooling, thus reducing greenhouse gas emissions. The inclusion of the first, second, and third control components allows the system to flexibly switch power supply modes according to actual needs, distributing energy consumption across AHU air conditioning units and campus terminal functions. Furthermore, by efficiently utilizing geothermal and waste heat resources, the system reduces energy costs and improves overall economic efficiency. The introduction of a cold storage tank enhances system stability, ensuring a stable power supply even during periods of insufficient energy supply or peak demand. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 The schematic diagram provided for the embodiments of this application.

[0046] Icons: 1-Geothermal well; 2-Ground source heat pump; 3-Waste heat pump; 4-Cooling tower; 5-Cold storage tank; 6-Park terminal; 7-AHU air conditioning unit; 8-Eighth water pump; 10-First water pump; 11-Second water pump; 12-First plate heat exchanger; 13-First valve; 14-Fourth valve; 15-Sixth valve; 16-Seventh valve; 17-Eighth valve; 20-Third water pump; 21-Fourth water pump; 22-Seventh water pump; 23-Second valve; 24-Third valve; 25-Fifth valve; 26-Ninth valve; 27-Tenth valve; 28-Eleventh valve; 30-Second plate heat exchanger; 31-Fifth water pump; 32-Sixth water pump. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0048] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0049] like Figure 1 As shown, a data center waste heat utilization system includes a geothermal well 1, a ground source heat pump 2, a waste heat pump 3, a cold storage tank 5, a campus terminal 6, multiple AHU air conditioning units 7, a first control component, a second control component, and a third control component. One working end of each AHU air conditioning unit 7 is connected to a working end of the corresponding ground source heat pump 2, a working end of the waste heat pump 3, and a working end of the cold storage tank 5. Another working end of the ground source heat pump 2 is connected to the output end of the geothermal well 1, and the input end of the geothermal well 1 is connected to an external geothermal environment pipe. The other working end of the waste heat pump 3 and one working end of the ground source heat pump 2 leading to the corresponding AHU air conditioning unit 7 are both connected to a working end pipe of the campus terminal 6. The other working end of the cold storage tank 5 is connected to the corresponding AHU air conditioning unit. One working end of the unit 7 is connected in parallel; the other working end of the park terminal 6 is connected to the external park environmental pipe; the first control component is set on the path from the geothermal well 1 through the ground source heat pump 2 to the corresponding AHU air conditioning unit 7, and can switch the power supply status of the ground source heat pump 2 to the park terminal 6 and the corresponding AHU air conditioning unit 7 in real time; the second control component is set on the paths from the two working ends of the waste heat heat pump 3 to the corresponding AHU air conditioning unit 7 and the park terminal 6 respectively, and can switch the power supply status of the waste heat heat pump 3 to the park terminal 6 and the corresponding AHU air conditioning unit 7 in real time; the third control component is set on the path from the cold storage tank 5 to the corresponding AHU air conditioning unit 7, and can switch the power supply status of the cold storage tank 5 to the AHU air conditioning unit 7 in real time.

[0050] In practice, an eighth water pump is connected to the path of the AHU air conditioning unit 7 leading to the ground source heat pump, waste heat pump, and cold storage tank. Multiple eighth water pumps 8 are responsible for transferring the heat or cold energy provided by the ground source heat pump 2, waste heat pump 3, or cold storage tank 5 to the corresponding AHU air conditioning unit 7.

[0051] In the above scheme, geothermal well 1 extracts geothermal energy from the external geothermal environment and transfers it to ground source heat pump 2. Ground source heat pump 2 uses geothermal energy for heating or cooling operations, providing heat or cold energy to the park terminal 6 or the corresponding AHU air conditioning unit 7 (air handling unit) as needed. Waste heat pump 3 recovers waste heat from the data center, which is usually waste heat generated during the operation of the data center. Waste heat pump 3 converts the recovered heat energy into usable heat energy and, according to demand, switches in real time through the second control component to provide heat energy to the park terminal 6 or the corresponding AHU air conditioning unit 7. Cold storage tank 5 stores cold energy during off-peak periods (such as nighttime), usually achieved by the ground source heat pump 2 or waste heat pump 3 operating in cooling mode. During peak periods or when cold energy is needed, the third control component switches the energy release state of cold storage tank 5, supplying the stored cold energy to the AHU air conditioning unit 7 through the corresponding eighth water pump 8. The first, second, and third control components are responsible for switching the power supply status of the ground source heat pump 2, waste heat heat pump 3, and cold storage tank 5 in real time, respectively, to ensure that the system can operate efficiently and flexibly according to actual needs. Multiple AHU air conditioning units 7 are connected to the input pipes of end users and are responsible for supplying processed air (heated or cooled) to end users.

[0052] In this application, through the coordinated operation of geothermal well 1 and ground source heat pump 2, the system can efficiently utilize geothermal energy and waste heat, reducing dependence on traditional energy sources and thus lowering carbon emissions. The utilization of waste heat pump 3 enables the recovery and reuse of waste heat energy from the data center, improving energy efficiency. The real-time switching function of the first, second, and third control components allows the system to flexibly adjust its energy supply status according to actual needs, improving system flexibility and reliability. The energy storage and release function of cold storage tank 5 provides the system with additional buffer capacity to cope with emergencies or demand fluctuations.

[0053] The first control component includes a first water pump 10, a second water pump 11, a first plate heat exchanger 12, two sets of first valves 13, a fourth valve 14, a sixth valve 15, a seventh valve 16, and an eighth valve 17. The first water pump 10 is installed on the return water path from the ground source heat pump 2 to the corresponding AHU air conditioning unit 7. The second water pump 11 is connected to the return water path from the geothermal well 1 to the ground source heat pump 2. The pipes of the first plate heat exchanger 12 are connected in parallel with the return water path and the supply water pipe of the ground source heat pump 2. One set of first valves 13 is connected to the return water path and the supply water pipe of the ground source heat pump 2. On the path of the corresponding AHU air conditioning unit 7, another set of first valves 13 are connected to the path from the cold storage tank 5 to the AHU air conditioning unit 7; fourth valve 14 is connected to the path from the ground source heat pump 2 to the corresponding AHU air conditioning unit 7 via the first plate heat exchanger 12; sixth valve 15 is connected to the path from the ground source heat pump 2 to the corresponding AHU air conditioning unit 7; seventh valve 16 is connected to the path from the ground source heat pump 2 to the geothermal well 1; and eighth valve 17 is connected to the path from the first plate heat exchanger 12 to the path from the geothermal well 1 to the ground source heat pump 2.

[0054] In the above scheme, when the ground source heat pump 2 needs to provide heat or cooling energy to the corresponding AHU air conditioning unit 7, the first water pump 10 starts, pumping the water (return water) treated by the ground source heat pump 2 to the corresponding AHU air conditioning unit 7. Simultaneously, the second water pump 11 starts, pumping the geothermal water (or cooling water) from the geothermal well 1 to the ground source heat pump 2 for heating or cooling. The first plate heat exchanger 12 acts as a heat exchanger, with its piping connected in parallel to the return water path and supply water pipe of the ground source heat pump 2. This arrangement allows the return water from the ground source heat pump 2 to exchange heat with the water in the supply water pipe through the first plate heat exchanger 12, thereby adjusting the temperature of the water in the supply water pipe. The fourth valve 14 controls the connection between the first plate heat exchanger 12 and the path from the ground source heat pump 2 to the AHU air conditioning unit 7. When heat exchange is needed using the first plate heat exchanger 12, the fourth valve 14 opens; when heat exchange is not needed using the first plate heat exchanger 12, the fourth valve 14 closes. Two sets of first valves 13 control the paths from the ground source heat pump 2 to the AHU air conditioning unit 7 and from the cold storage tank 5 to the AHU air conditioning unit 7, respectively. By adjusting the opening of the two sets of first valves 13, the amount of heat or cold energy supplied by the ground source heat pump 2 and the cold storage tank 5 to the AHU air conditioning unit 7 can be adjusted. Sixth valves 15 and seventh valves 16 control the paths from the ground source heat pump 2 to the AHU air conditioning unit 7 and the geothermal well 1, respectively. By adjusting the opening of the sixth valves 15 and seventh valves 16, the heating or cooling capacity of the ground source heat pump 2 and the return water flow rate of the geothermal well 1 can be controlled. Eighth valve 17 controls the connection between the first plate heat exchanger 12 and the path from the geothermal well 1 to the ground source heat pump 2. When it is necessary to utilize the geothermal water in the geothermal well 1 for waste heat or pre-cooling, the eighth valve 17 is opened; when it is not necessary to utilize the geothermal water in the geothermal well 1 for waste heat or pre-cooling, the eighth valve 17 is closed.

[0055] The first control component in this application can switch between different operating modes according to the needs of the park terminal 6 and the AHU air conditioning unit 7. For example, in the winter heating mode, the ground source heat pump 2 uses the heat energy in the geothermal well 1 for heating and sends the heated water to the AHU air conditioning unit 7 through the first water pump 10. At the same time, the first plate heat exchanger 12 may be used for water in the waste heat supply pipe. In the summer cooling mode, the ground source heat pump 2 may use the cooling water in the geothermal well 1 for cooling, or provide cooling energy through other means (such as the waste heat heat pump 3). At this time, the cold storage tank 5 may participate in the refrigeration cycle to store or release cold energy.

[0056] The second control component includes a third water pump 20, a fourth water pump 21, a seventh water pump 22, a second valve 23, a third valve 24, a fifth valve 25, and an eleventh valve 28. The third water pump 20 is connected to the return water path between the waste heat pump 3 and the AHU air conditioning unit 7. The fourth water pump 21 is connected to the return water path from the waste heat pump 3 to the park terminal 6. The seventh water pump 22 is connected to the return water path from the park terminal 6 to the ground source heat pump 2. The second valve 23 is connected to the path from the park terminal 6 to the corresponding AHU air conditioning unit 7 from the ground source heat pump 2. The third valve 24 is connected to the path from the waste heat pump 3 to the AHU air conditioning unit 7. The fifth valve 25 is connected to the path from the waste heat pump 3 to the corresponding AHU air conditioning unit 7 from the park terminal 6. The eleventh valve 28 is connected to the path from the park terminal 6 to the waste heat pump 3.

[0057] In the above scheme, waste heat pump 3 recovers waste heat from the data center and converts the heat energy into a usable form through its internal circulation system. Third water pump 20 is connected to the return water path between waste heat pump 3 and AHU air conditioning unit 7, responsible for pumping the treated water (return water) from waste heat pump 3 to AHU air conditioning unit 7 to meet its heating or cooling needs. Fourth water pump 21 is connected to the return water path from waste heat pump 3 to campus terminal 6, responsible for delivering the heat energy generated by waste heat pump 3 to campus terminal 6, which may be used for other heating or hot water supply needs. Seventh water pump 22 is connected to the return water path from campus terminal 6 to ground source heat pump 2. When the capacity of waste heat pump 3 is insufficient, the return water from campus terminal 6 is further heated or cooled by ground source heat pump 2. The second valve 23 is located on the path from the park terminal 6 to the ground source heat pump 2 and then to the eighth water pump 8. It is used to open and close the path from the park terminal 6 to the ground source heat pump 2 and then to the eighth water pump 8, thereby regulating the treatment level of the return water from the park terminal 6 by the ground source heat pump 2. The third valve 24 is connected to the path from the waste heat pump 3 to the eighth water pump 8. It is used to control whether the water treated by the waste heat pump 3 is directly delivered to the AHU air conditioning unit 7 or other destinations through the eighth water pump 8. The fifth valve 25 is connected to the path from the park terminal 6 to the eighth water pump 8 through the waste heat pump 3. When the park terminal 6 needs additional heat energy, the fifth valve 25 mixes the water treated by the waste heat pump 3 with the return water of the park terminal 6 before delivery. The eleventh valve 28 is connected to the path from the park terminal 6 to the waste heat pump 3. If the park terminal 6 needs to directly utilize the heat energy generated by the waste heat pump 3, the eleventh valve 28 is opened, so that the park terminal 6 and the waste heat pump 3 form a direct heat energy exchange path.

[0058] In this application, the precise control of the second control component maximizes the utilization of waste heat generated by the data center, reducing energy waste. The arrangement of the third water pump 20, fourth water pump 21, seventh water pump 22, second valve 23, third valve 24, fifth valve 25, and eleventh valve 28 allows the system to flexibly adjust the heat exchange path and amount between the waste heat heat pump 3, the campus terminal 6, and the ground source heat pump 2 according to actual needs, improving the system's flexibility and adaptability. When the capacity of the waste heat heat pump 3 is insufficient or the demand of the campus terminal 6 changes, the second control component can quickly adjust the heat exchange path to ensure stable system operation.

[0059] The third control component includes a second plate heat exchanger 30, a fifth water pump 31, and a sixth water pump 32; the second plate heat exchanger 30 is connected to the path from the cold storage tank 5 to the AHU air conditioning unit 7; the fifth water pump 31 is connected to the return water path from the cold storage tank 5 to the second plate heat exchanger 30; and the sixth water pump 32 is connected to the return water path from the second plate heat exchanger 30 to the AHU air conditioning unit 7.

[0060] In the above scheme, when the AHU air conditioning unit 7 needs cooling, the fifth water pump 31 starts, pumping the cold energy fluid in the cold storage tank 5 to the second plate heat exchanger 30. In the second plate heat exchanger 30, the cold energy fluid exchanges heat with the cooling water required by the AHU air conditioning unit 7, lowering the cooling water temperature. The cold energy fluid after heat exchange (at which point the temperature has increased) is pumped by the sixth water pump 32 to the eighth water pump 8 for further treatment or recycling. At the same time, the cooled water is delivered to the AHU air conditioning unit 7 to meet its cooling needs.

[0061] The second plate heat exchanger 30, as a heat exchange device, has the core function of transferring heat between two fluids without direct mixing. The second plate heat exchanger 30 is connected to the path from the cold storage tank 5 to the AHU air conditioning unit 7, used to transfer the cold energy in the cold storage tank 5 to the cooling water required by the AHU air conditioning unit 7. The fifth water pump 31 is connected to the return water path from the cold storage tank 5 to the second plate heat exchanger 30, and its main function is to pump the cold energy fluid (usually cooling water) from the cold storage tank 5 to the second plate heat exchanger 30. Through the action of the fifth water pump 31, the cold energy in the cold storage tank 5 is continuously and stably supplied to the second plate heat exchanger 30, and then transferred to the AHU air conditioning unit 7. The sixth water pump 32 is connected to the return water path from the second plate heat exchanger 30 to the eighth water pump 8, pumping the fluid that has undergone heat exchange in the second plate heat exchanger 30 (i.e., heated cooling water or cooled supply hot water) to the eighth water pump 8 for subsequent treatment or recycling.

[0062] This application also includes a cooling tower 4; one working end of the cooling tower 4 is connected to the external environment, and the other working end of the cooling tower 4 is connected to the path from the park terminal 6 to the waste heat pump 3, which can compensate for the energy supply status of the waste heat pump 3 and the ground source heat pump 2 to the AHU air conditioning unit 7.

[0063] In the above scheme, one working end of the cooling tower 4 is connected to the external environment, using natural wind or mechanical ventilation to evaporate the hot fluid (usually water) for heat dissipation. This eliminates reliance on traditional electric cooling equipment, thus enhancing the system's adaptability to the external environment, especially under conditions of power shortages or severe weather. The other working end of the cooling tower 4 is connected to the path from the park terminal 6 to the waste heat pump 3, serving as an auxiliary cooling device for the waste heat pump 3. It provides additional cooling capacity when needed, thereby optimizing energy utilization efficiency.

[0064] When the waste heat heat pump 3 is operating in heating mode, if the system detects that the heat demand of the AHU air conditioning unit 7 exceeds the supply capacity of the waste heat heat pump 3, other heat sources such as the cooling tower 4 or the ground source heat pump 2 can be activated to supplement the heat supply. The cooling tower 4 plays a role when the waste heat heat pump 3 needs cooling.

[0065] In cooling mode, if the cooling capacity of waste heat pump 3 is insufficient, or if the system requires additional cooling to lower the temperature of the circulating water to improve cooling efficiency, cooling tower 4 will be activated. Cooling tower 4 lowers the temperature of the circulating water below a set value through evaporative cooling. The cooled water is then returned to waste heat pump 3 for further cooling or directly supplied to AHU air conditioning unit 7. The campus terminal 6 and cooling tower 4 are indirectly connected via waste heat pump 3. The heat or cooling demand generated by campus terminal 6 is first met by waste heat pump 3. Only when waste heat pump 3 cannot meet the demand will the system activate cooling tower 4 or other auxiliary equipment.

[0066] A ninth valve 26 is installed on the path from the cooling tower 4 to the geothermal well 1 to compensate for the power supply status of the ground source heat pump 2 to the corresponding AHU air conditioning unit 7; a tenth valve 27 is installed on the path from the cooling tower 4 to the waste heat heat pump 3 to compensate for the power supply status of the waste heat heat pump 3 to the AHU air conditioning unit 7.

[0067] In the above scheme, the ninth valve 26 is located on the path from the cooling tower 4 to the geothermal well 1. Its main function is to control the fluid flow between the cooling tower 4 and the geothermal well 1. When the ground source heat pump 2 is insufficient to meet the energy supply demand of the AHU air conditioning unit 7 (for example, insufficient geothermal energy supply under extreme weather conditions), the system can supplement the energy supply of the ground source heat pump 2 by opening the ninth valve 26 and using the fluid cooled by the cooling tower 4. The cooling tower 4 reduces the temperature of the fluid through evaporative heat dissipation. Then, this cooled fluid flows through the ninth valve 26 to the geothermal well 1 to exchange heat with the fluid in the geothermal well 1, further reducing or increasing the temperature to meet the energy supply demand of the AHU air conditioning unit 7.

[0068] The tenth valve 27 is located on the path from the cooling tower 4 to the waste heat pump 3. Its main function is to control the fluid flow between the cooling tower 4 and the waste heat pump 3. When the waste heat pump 3 is insufficient to meet the energy supply requirements of the AHU air conditioning unit 7 (for example, when the waste heat recovery is insufficient) or when additional cooling is required, the system can open the tenth valve 27 to use the cooling fluid provided by the cooling tower 4 to assist the operation of the waste heat pump 3. The fluid cooled by the cooling tower 4 enters the waste heat pump 3 system through the tenth valve 27 and exchanges heat with the working fluid in the waste heat pump 3, thereby enhancing or regulating the energy supply capacity of the waste heat pump 3.

[0069] Waste heat pump 3 is a dual-condition component for different temperature environments.

[0070] It should be noted that the different temperature environments are summer and winter. In this application, the waste heat heat pump 3 operates at (35 / 30℃, 7 / 12℃) in summer and at (55 / 45℃, 12 / 18℃) in winter.

[0071] In summer operation, waste heat pump 3 absorbs heat from external heat sources (such as industrial waste heat, residual heat, etc.) and transfers this heat to a cooling medium (such as water or air) through a refrigeration cycle. Simultaneously, cooling system 4 is activated to assist waste heat pump 3, working together to achieve a cooling effect. In this case, waste heat pump 3 can be used as a chiller, providing a cold source for spaces or equipment requiring cooling. In winter operation, waste heat pump 3 absorbs heat from low-temperature heat sources (such as ambient air, groundwater, etc.) and transfers this heat to spaces or equipment requiring heating through a heating cycle. In this case, waste heat pump 3 can be used as a heat pump, providing thermal energy to the system.

[0072] The dual-mode waste heat pump 3 in this application can flexibly switch its operating mode according to different operating conditions, thereby efficiently utilizing waste heat resources, reducing dependence on traditional energy sources, and minimizing carbon emissions and environmental pollution. The dual-mode waste heat pump 3 allows the system to flexibly adjust its operating mode according to actual needs, adapting to different thermal energy demand scenarios.

[0073] The control methods for the data center waste heat recovery system in this application under different environments are as follows:

[0074] In springtime conditions:

[0075] Initial phase: Open the fourth valve 14, the eighth valve 17, the first water pump 10, the second water pump 11, and the eighth water pump 8; close the ground source heat pump 2; and use the temperature of the geothermal well 1 for heat exchange to provide cooling for the data center.

[0076] In the final stage: when the heat exchange of the geothermal well 1 cannot meet the heating demand, the fourth valve 14 and the eighth valve 17 are closed, and the sixth valve 15, the seventh valve 16 and the ground source heat pump 2 are opened to further cool the data center;

[0077] In summer conditions:

[0078] Close the fourth valve 14 and the eighth valve 17, and open the sixth valve 15, the seventh valve 16, the first water pump 10, the second water pump 11, the eighth water pump 8 and the ground source heat pump 2 to provide cooling for the data center;

[0079] Open the fifth valve 25, the tenth valve 27, the third water pump 20, the fourth water pump 21, the seventh water pump 22, the waste heat heat pump 3, and the cooling tower 4, and close the third valve 24 and the eleventh valve 28 to provide cooling for the park terminal 6.

[0080] In autumn:

[0081] Initially: The temperature of geothermal well 1 can meet the needs of the functional room of ground source heat pump 2. Close the fourth valve 14 and the eighth valve 17, and open the sixth valve 15, the seventh valve 16 and ground source heat pump 2 to provide cooling for the data center.

[0082] Final stage: Open the fourth valve 14, the eighth valve 17 and the ninth valve 26, close the sixth valve 15, the seventh valve 16, the tenth valve 27 and the ground source heat pump 2, and directly exchange heat through the cooling tower 4;

[0083] In winter conditions:

[0084] Open the third valve 24, the eleventh valve 28, the third water pump 20, the fourth water pump 21 and the waste heat pump 3, and close the fifth valve 25 and the tenth valve 27. Use the waste heat pump 3 to cool the data center and heat the campus terminal 6 at the same time.

[0085] Open the second valve 23, the sixth valve 15, the seventh valve 16, the first water pump 10, the second water pump 11, the seventh water pump 22, the waste heat heat pump 3, and the ground source heat pump 2, and use the ground source heat pump 2 and the waste heat heat pump 3 to supply heat to the park terminal 6.

[0086] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0087] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A data center waste heat utilization system, characterized in that, The system comprises a geothermal well (1), a ground source heat pump (2), a waste heat pump (3), a cold storage tank (5), a park terminal (6), a plurality of AHU air conditioning units (7), a first control assembly, a second control assembly and a third control assembly; One working end of each of the plurality of AHU air conditioning units (7) is connected to a working end of the corresponding ground source heat pump (2), waste heat pump (3) and cold storage tank (5); The other working end of the ground source heat pump (2) is connected to the output end of the geothermal well (1), and the input end of the geothermal well (1) is connected to an external geothermal environment pipe; The other working end of the waste heat pump (3) and the ground source heat pump (2) are connected to a working end of the corresponding AHU air conditioning unit (7) and the park terminal (6); The other working end of the cold storage tank (5) is connected in parallel to a working end of the corresponding AHU air conditioning unit (7); The other working end of the park terminal (6) is connected to an external park environment pipe; The first control assembly is arranged on a path from the geothermal well (1) to the corresponding AHU air conditioning unit (7) through the ground source heat pump (2), and can switch the energy supply state of the ground source heat pump (2) to the park terminal (6) and the corresponding AHU air conditioning unit (7) in real time; The second control assembly is arranged on a path from the two working ends of the waste heat pump (3) to the corresponding AHU air conditioning unit (7) and the park terminal (6), and can switch the energy supply state of the waste heat pump (3) to the park terminal (6) and the corresponding AHU air conditioning unit (7) in real time; The third control assembly is arranged on a path from the cold storage tank (5) to the corresponding AHU air conditioning unit (7), and can switch the energy supply state of the cold storage tank (5) to the AHU air conditioning unit (7) in real time.

2. The data center waste heat utilization system of claim 1, wherein, The first control assembly comprises a first water pump (10), a second water pump (11), a first plate exchanger (12), two groups of first valves (13), a fourth valve (14), a sixth valve (15), a seventh valve (16) and an eighth valve (17); The first water pump (10) is arranged on a return water path of the ground source heat pump (2) to the corresponding AHU air conditioning unit (7); The second water pump (11) is connected to a return water path of the geothermal well (1) to the ground source heat pump (2); The pipeline of the first plate exchanger (12) is connected in parallel to the return water path of the ground source heat pump (2) and a water supply pipe; One group of the first valves (13) is connected to a path of the ground source heat pump (2) to the corresponding AHU air conditioning unit (7), and the other group of the first valves (13) is connected to a path of the cold storage tank (5) to the AHU air conditioning unit (7); The fourth valve (14) is connected to a path of the first plate exchanger (12) from the ground source heat pump (2) to the corresponding AHU air conditioning unit (7); The sixth valve (15) is connected to the path of the ground source heat pump (2) leading to the corresponding AHU air conditioning unit (7); The seventh valve (16) is connected to the path of the ground source heat pump (2) leading to the geothermal well (1); The eighth valve (17) is connected to the path of the first plate exchanger (12) leading from the geothermal well (1) to the ground source heat pump (2).

3. The data center waste heat utilization system of claim 1, wherein, The second control assembly includes a third water pump (20), a fourth water pump (21), a seventh water pump (22), a second valve (23), a third valve (24), a fifth valve (25) and an eleventh valve (28); The third water pump (20) is connected to the return water path of the waste heat heat pump (3) and the AHU air conditioning unit (7); The fourth water pump (21) is connected to the return water path of the waste heat heat pump (3) leading to the park terminal (6); The seventh water pump (22) is connected to the return water path of the park terminal (6) leading to the ground source heat pump (2); The second valve (23) is connected to the path of the park terminal (6) leading from the ground source heat pump (2) to the corresponding AHU air conditioning unit (7); The third valve (24) is connected to the path of the waste heat heat pump (3) leading to the AHU air conditioning unit (7), respectively; The fifth valve (25) is connected to the path of the park terminal (6) leading from the waste heat heat pump (3) to the corresponding AHU air conditioning unit (7); The eleventh valve (28) is connected to the path of the park terminal (6) leading to the waste heat heat pump (3).

4. The data center waste heat utilization system of claim 1, wherein, The third control assembly includes a second plate exchanger (30), a fifth water pump (31) and a sixth water pump (32); The second plate exchanger (30) is connected to the path of the cold storage tank (5) leading to the AHU air conditioning unit (7); The fifth water pump (31) is connected to the return water path of the cold storage tank (5) leading to the second plate exchanger (30); The sixth water pump (32) is connected to the return water path of the second plate exchanger (30) leading to the AHU air conditioning unit (7).

5. The data center waste heat utilization system of claim 1, wherein, A cooling tower (4) is further included; One working end of the cooling tower (4) is in communication with the external environment, and the other working end of the cooling tower (4) is connected to the path of the park terminal (6) leading to the waste heat heat pump (3), which can compensate the energy supply state of the waste heat heat pump (3) and the ground source heat pump (2) to the AHU air conditioning unit (7).

6. The data center waste heat utilization system of claim 5, wherein, The cooling tower (4) is provided with a ninth valve (26) on the path leading to the geothermal well (1), which is used to compensate the energy supply state of the ground source heat pump (2) to the corresponding AHU air conditioning unit (7); The cooling tower (4) is provided with a tenth valve (27) on the path leading to the waste heat heat pump (3), which is used to compensate the energy supply state of the waste heat heat pump (3) to the AHU air conditioning unit (7).

7. The data center waste heat utilization system of claim 1, wherein, The waste heat heat pump (3) is a double working condition assembly.

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