Data center cold-heat integrated fluorine pump heat recovery system and control method thereof

Abstract

The application discloses a data center cold-heat integrated fluorine pump heat recovery system and a control method thereof, and belongs to the technical field of energy saving. The system comprises a data center waste heat heating system, a fluorine pump natural cooling system and a vapor compression refrigeration system. The data center waste heat heating system is used for recovering waste heat from data center return water and increasing the waste heat temperature to heat a heat user. The fluorine pump natural cooling system and the vapor compression refrigeration system are both used for absorbing waste heat in the data center return water to provide cold energy for the data center to meet the cooling demand of the data center under different working conditions in the whole year. The application makes full use of the data center waste heat and outdoor natural cold source to further reduce the cooling energy consumption of the data center while meeting the refrigeration demand of the data center and the heating demand of the heat user. In addition, the application also uses an integrated valve which can meet the variable working condition and multi-mode operation demand of the system, thereby reducing the number of valves and control difficulty and facilitating the installation and management of the system.

Description

Technical Field

[0001] This invention relates to the field of energy-saving technology, specifically to a data center integrated cooling and heating fluorine pump heat recovery system and its control method. Background Technology

[0002] With the development of global networking and informatization, computing power is becoming a new productive force, providing fundamental impetus for the digital transformation of various industries. my country is also actively guiding the development of the data center industry, and the data center market is continuously expanding. While the scale of data centers is growing, energy consumption is becoming increasingly prominent. It is understood that my country's data center electricity consumption exceeded 200 billion kilowatt-hours in 2020, accounting for 2.71% of total social electricity consumption, and this ratio is expected to reach 3.6% in 2023. The electricity consumed by data centers is ultimately converted into waste heat, which is discharged outdoors by air conditioning systems. This not only results in a huge waste of data center waste heat but also causes enormous energy consumption in air conditioning systems. On the other hand, with the rapid development of my country's building scale and the improvement of people's living standards, building energy consumption has accounted for more than 30% of total social energy consumption, and has brought serious environmental pollution problems. Developing clean, efficient, and renewable building heating methods has become an urgent social issue to be addressed. If the waste heat from data centers can be recovered for building heating, it can reduce the energy consumption and environmental pollution caused by the cooling and heating needs of data centers to a certain extent.

[0003] In existing technologies, to improve the energy efficiency of data centers, waste heat from the data center is generally used to provide domestic hot water and heating for users. For example, Chinese patent CN 109579107 B discloses a waste heat heating system for data centers, including a chiller unit, a conventional heat pump, and a high-temperature heat pump. This system absorbs waste heat from the chilled water in the data center through the evaporator in the chiller unit, and after a thermodynamic cycle, the heat pump condenser performs a first heating of the return water to the heating network. The ambient temperature heat pump evaporator recovers waste heat from the data center and performs a second heating of the return water to the heating network in the condenser. Finally, the high-temperature heat pump performs a third heating of the return water to the heating network before supplying hot water to the building. This system increases the temperature difference between the supply and return water, improving the temperature of the heating network supply, the external heating capacity, and the energy efficiency. However, the existing technology has the following problems:

[0004] 1. The waste heat recovery section of this system consists of a chiller unit and a conventional heat pump, which operate independently and require multiple ports for installation. In addition, the system has two heat pump systems and one chiller unit, each operating independently, which presents problems such as complex control and high personnel requirements. Furthermore, during the non-heating season, the system uses the chiller unit to cool the data center, which does not make full use of natural cold sources, resulting in huge energy consumption and failing to meet the year-round cooling and heating needs of the data center and users.

[0005] 2. Existing waste heat heating systems for data centers mostly rely on opening and closing valves to switch between different modes. However, the large number and dispersed arrangement of valves not only increases the complexity of valve control but also increases the difficulty of laying pipelines and control lines. For example, Chinese Patent CN 116193809 A discloses a multi-energy complementary multi-source heat recovery air conditioning system for data centers. This system has 27 valves, which are also dispersed, resulting in complex system control and high difficulty in laying pipelines and control lines.

[0006] 3. Some existing data center waste heat heating systems have high requirements for data center site selection. For example, Chinese patent CN201611180037.2 discloses a data center waste heat utilization tap water cooling and waste heat recovery system and method. The system makes full use of tap water for cooling and waste heat recovery. The system is simple, but it is only suitable for data centers near tap water plants. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention provides a data center integrated cooling and heating refrigerant pump heat recovery system and its control method. This system aims to solve the problems of existing data center waste heat heating systems, such as independent operation of subsystems, inability to meet the year-round cooling and heating needs of the data center and users, a large number of valves and complex control, high difficulty in laying pipelines and control lines, and high requirements for data center site selection. To achieve the above objectives, this invention provides the following technical solution:

[0008] The integrated heating and cooling system for data centers using refrigerant pumps includes a waste heat heating system, a refrigerant pump natural cooling system, and a vapor compression refrigeration system. The waste heat heating system recovers waste heat from the data center's return water and increases its temperature to provide heating to users. Both the refrigerant pump natural cooling system and the vapor compression refrigeration system absorb waste heat from the data center's return water to provide cooling capacity to meet the data center's cooling needs under different operating conditions throughout the year.

[0009] Furthermore, the data center waste heat heating system includes a data center, a chilled water pump, a vapor compression circulation module, a first cooling water pump, an integrated valve module, a water distributor, and a water collector; the refrigerant pump natural cooling system includes a data center, a chilled water pump, a refrigerant pump circulation module, an integrated valve module, a cooling tower, and a second cooling water pump; the vapor compression refrigeration system includes a data center, a chilled water pump, a vapor compression circulation module, a first cooling water pump, an integrated valve module, and a cooling tower.

[0010] Furthermore, the integrated valve module includes a housing and an integrated valve assembly disposed within the housing. The housing is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, and an eighth interface for connecting to the integrated valve assembly.

[0011] The data center, chilled water pump, and vapor compression circulation module are connected in a closed loop via chilled water pipelines. The vapor compression circulation module, first cooling water pump, first interface, second interface, water distributor, water collector, third interface, and fourth interface are connected in a closed loop via cooling water pipelines to form a waste heat heating system for the data center.

[0012] The data center, chilled water pump, and refrigerant pump circulation module are connected in a closed loop via chilled water pipelines. The refrigerant pump circulation module, the fifth interface, the sixth interface, the cooling tower, the seventh interface, the eighth interface, and the second cooling water pump are connected in a closed loop via cooling water pipelines to form a refrigerant pump natural cooling system.

[0013] The data center, chilled water pump, and vapor compression circulation module are connected in a closed loop via chilled water pipelines. The vapor compression circulation module, the first cooling water pump, the first interface, the sixth interface, the cooling tower, the seventh interface, and the fourth interface are connected in a closed loop via cooling water pipelines to form a vapor compression refrigeration system.

[0014] Furthermore, the vapor compression cycle module is composed of at least a first evaporator, a gas-liquid separator, a low-pressure switch, a compressor, a high-pressure switch, a first condenser, and a throttle valve connected in series in a closed loop via refrigerant piping to form a first refrigerant piping loop; the data center, the chilled water pump, and the first evaporator are connected in a closed loop via chilled water piping; the outlet of the first condenser is connected to the first cooling water pump, and the inlet of the first condenser is connected to the fourth interface.

[0015] Furthermore, the refrigerant pump circulation module is composed of at least a second evaporator, a second condenser, a liquid receiver, and a refrigerant pump connected in series in a closed loop via refrigerant piping to form a second refrigerant piping loop; the data center, the chilled water pump, and the second evaporator are connected in a closed loop via chilled water piping; the outlet of the second condenser is connected to the fifth interface, and the inlet of the second condenser is connected to the second cooling water pump.

[0016] Furthermore, the first evaporator and the second evaporator are connected in series to the same chilled water loop; the chilled water loop is connected in a closed loop in series with the data center, the chilled water pump, the first evaporator, and the second evaporator.

[0017] Furthermore, the integrated valve assembly includes a first four-way valve, a second four-way valve, and a third four-way valve; each of the first, second, and third four-way valves is provided with a first connecting channel, a second connecting channel, a third connecting channel, and a fourth connecting channel; the first, second, and third connecting channels of the first four-way valve are respectively connected to a first interface, a second interface, and a third interface, and the fourth connecting channel of the first four-way valve is connected to the second connecting channel of the second four-way valve; the first and fourth connecting channels of the second four-way valve are respectively connected to a fifth interface and a sixth interface, and the third connecting channel of the second four-way valve is connected to the first connecting channel of the third four-way valve; the fourth and third connecting channels of the third four-way valve are respectively connected to a seventh interface and an eighth interface, and the second connecting channel of the third four-way valve is connected to the fourth interface.

[0018] Furthermore, the first four-way valve, the second four-way valve, and the third four-way valve all include a four-way valve unit; the four-way valve unit includes a valve body, a valve core assembly, an operating shaft assembly, and a limiting assembly; the valve body extends vertically; the valve body has a first connecting channel, a second connecting channel, a third connecting channel, and a fourth connecting channel evenly arranged along the circumference of the valve body in the radial direction; the operating shaft assembly is fitted inside the valve body; the valve core assembly is connected to the operating shaft assembly, and the operating shaft assembly and the valve core assembly are coaxially arranged; the valve core assembly includes a first valve core, a second valve core, and a third valve core connected in sequence; the operating shaft assembly is used to drive the valve core assembly to move vertically and vertically and rotate along its own rotation direction, thereby realizing the switching of the valve core, the adjustment of the valve core flow path and the flow rate; the limiting assembly includes at least a first limiting member for fixing the operating shaft assembly and the valve body.

[0019] Furthermore, the first valve core is provided with a circular flow channel perpendicular to the central axis of the first valve core; the second valve core is provided with two second arc-shaped flow channels perpendicular to the central axis of the second valve core, and the two second arc-shaped flow channels are symmetrical about the central axis of the second valve core; the inlet and outlet center lines of the second arc-shaped flow channels are perpendicular to each other; the third valve core is provided with a third arc-shaped flow channel perpendicular to the central axis of the third valve core; the inlet and outlet center lines of the third arc-shaped flow channel are perpendicular to each other.

[0020] The control method of the integrated cooling and heating fluorine pump heat recovery system for data centers adopts the above-mentioned integrated cooling and heating fluorine pump heat recovery system for data centers. By switching the integrated valve assembly, five operating modes can be obtained: data center waste heat heating, fluorine pump natural cooling, vapor compression refrigeration, combined operation of data center waste heat heating and fluorine pump natural cooling, and combined operation of data center waste heat heating and vapor compression refrigeration.

[0021] The beneficial effects of this invention are:

[0022] 1. The integrated heat recovery system of the data center heating and cooling fluorine pump provided by the present invention has the functions of waste heat heating and natural cooling. The waste heat heating system of the data center can meet the annual load demand of heat users without the need for auxiliary heating. On this basis, the natural cooling system of the fluorine pump makes full use of the outdoor natural cold source, significantly reduces the operation time of the vapor compression refrigeration mode, and can reduce energy consumption.

[0023] 2. The integrated cold and hot refrigerant pump heat recovery system for data centers provided by this invention realizes the use of cold and hot water loops for cooling or heating. The system has a compact structure and can be connected to both the data center side and the heating user side with a single pipe, which is convenient for installation. It can meet the cooling and district heating needs of existing or newly built data centers of different sizes, from small to super-large, and has high flexibility and wide applicability.

[0024] 3. The data center integrated cooling and heating fluorine pump heat recovery system provided by the present invention improves the outdoor condenser side of the fluorine pump natural cooling system from conventional air cooling to cooling tower evaporative cooling, thereby increasing the usable temperature level of the outdoor natural cold source and increasing the working time of the fluorine pump natural cooling mode.

[0025] 4. The data center integrated cooling and heating fluorine pump heat recovery system provided by the present invention uses an integrated valve with flow path and flow regulation function in the system water loop. The system can meet the requirements of variable operating conditions and multi-mode operation by controlling the integrated valve alone, which reduces the number of valves and control difficulty, as well as the complexity of pipeline and control line laying, and facilitates system installation and management. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the integrated cooling and heating fluorine pump heat recovery system for data centers provided by the present invention;

[0027] Figure 2 This is a schematic diagram of the waste heat heating system for data centers provided by the present invention;

[0028] Figure 3 This is a schematic diagram of the natural cooling system for the fluorine pump provided by the present invention;

[0029] Figure 4 This is a schematic diagram of the vapor compression refrigeration system provided by the present invention;

[0030] Figure 5 This is a schematic diagram of the combined operation of the data center waste heat heating system and the vapor compression refrigeration system provided by the present invention;

[0031] Figure 6 This is a schematic diagram of a four-way valve structure provided by the present invention;

[0032] Figure 7 This is a structural schematic diagram of the valve body provided by the present invention, wherein A, B, C, and D correspond to four connection channels respectively;

[0033] Figure 8 This is a schematic diagram of the structure of the first valve core provided by the present invention, wherein: Figure 8 (a) and (b) are the top view and left view of the first valve core, respectively;

[0034] Figure 9 This is a schematic diagram of the structure of the second valve core provided by the present invention, wherein: Figure 9 (a) and (b) are the top view and left view of the second valve core, respectively;

[0035] Figure 10 This is a schematic diagram of the structure of the third valve core provided by the present invention, wherein: Figure 10 (a) and (b) are the top and left views of the third valve core, respectively;

[0036] Figure 11 This is a schematic diagram of the 180° single-flow-path adjustment provided by the present invention, wherein: Figure 11 (a) AC is on. Figure 11 (b) BD is on;

[0037] Figure 12 This is a schematic diagram of dual-flow path adjustment provided by the present invention, wherein: Figure 12 (a) AB and CD are both conducting simultaneously. Figure 12 (b) AD and BC are both conducting simultaneously;

[0038] Figure 13 This is a schematic diagram of a 90° single-flow-path adjustment provided by the present invention, wherein: Figure 13 (a) indicates that AB is conducting. Figure 13 (b) indicates that BC is conducting. Figure 13 (c) CD is turned on. Figure 13 (d) indicates that DA is on;

[0039] In the attached diagram: 1-Data center, 2-chilled water pump, 3-first evaporator, 4-gas-liquid separator, 5-low-pressure switch, 6-compressor, 7-high-pressure switch, 8-first condenser, 9-throttle valve, 10-first cooling water pump, 11-integrated valve module, 12-water distributor, 13-water collector, 14-first four-way valve, 15-second four-way valve, 16-third four-way valve, 17-cooling tower, 18-second cooling water pump, 19-second evaporator, 20-fluorine pump, 21-liquid receiver, 22-second condenser, 23-vapor compression circulation module, 24-fluorine pump circulation module, 25-valve body, 26-operating shaft assembly, 27-first valve core, 28-second valve core, 29-third valve core, 30-first limit component. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0041] Example 1:

[0042] See attached Figures 1-13 The integrated cooling and heating system for data centers using a refrigerant pump includes a waste heat heating system, a refrigerant pump natural cooling system, and a vapor compression refrigeration system. The waste heat heating system recovers waste heat from the data center's return water and raises its temperature to provide heating to users. Both the refrigerant pump natural cooling system and the vapor compression refrigeration system absorb waste heat from the data center's return water, providing cooling capacity to meet the cooling needs of data center 1 under different operating conditions throughout the year. As can be seen from the above structure, the integrated cooling and heating system for data centers provided by this invention includes three subsystems: a waste heat heating system, a refrigerant pump natural cooling system, and a vapor compression refrigeration system. These three subsystems coordinate with each other to meet the year-round cooling and heating needs of data center 1 and its users. Specifically, the system's operation throughout the year can be divided into two parts: one during the cold winter and lower-temperature transitional seasons, and the other during the higher-temperature transitional seasons and hot summers. During cold winters and low-temperature transitional seasons, if the waste heat provided by Data Center 1 is less than the heat demand of users, the data center waste heat heating system operates alone to recover waste heat for user heating; this is the data center waste heat heating mode. If the waste heat provided by Data Center 1 is greater than the heat demand of users, the data center waste heat heating system and the refrigerant pump natural cooling mode operate simultaneously. After recovering waste heat for user heating, the remaining data center waste heat load is handled by the refrigerant pump natural cooling system using natural cold sources; this is the combined operation mode of data center waste heat heating and refrigerant pump natural cooling. During high-temperature transitional seasons and hot summers, if users have heating needs, the data center waste heat heating mode is prioritized for user heating, and the remaining data center waste heat load is handled by the vapor compression refrigeration system; this is the combined operation mode of data center waste heat heating and vapor compression refrigeration. If users do not have heating needs, the vapor compression refrigeration system operates alone to meet the cooling needs of Data Center 1; this is the vapor compression refrigeration mode.

[0043] The data center waste heat heating system includes a data center 1, a chilled water pump 2, a vapor compression circulation module 23, a first cooling water pump 10, an integrated valve module 11, a water distributor 12, and a water collector 13; the refrigerant pump natural cooling system includes a data center 1, a chilled water pump 2, a refrigerant pump circulation module 24, an integrated valve module 11, a cooling tower 17, and a second cooling water pump 18; the vapor compression refrigeration system includes a data center 1, a chilled water pump 2, a vapor compression circulation module 23, a first cooling water pump 10, an integrated valve module 11, and a cooling tower 17. From the above structure, it can be seen that, as... Figure 1 The data center integrated cooling and heating refrigerant pump heat recovery system provided by the present invention specifically includes a data center 1, a chilled water pump 2, a vapor compression circulation module 23, a refrigerant pump circulation module 24, a first cooling water pump 10, a second cooling water pump 18, a water distributor 12, a water collector 13, a cooling tower 17, and an integrated valve module 11. The three subsystems are not completely independent. For example, they share the chilled water pump 2, the integrated valve module 11, and the cooling tower 17. The switching or simultaneous operation of each subsystem can be achieved by controlling the flow path of the integrated valve module 11.

[0044] The integrated valve module 11 includes a housing and an integrated valve assembly disposed within the housing. The housing is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, and an eighth interface for connecting to the integrated valve assembly. The data center 1, the chilled water pump 2, and the vapor compression circulation module 23 are connected in a closed loop via chilled water pipelines. The vapor compression circulation module 23, the first cooling water pump 10, the first interface, the second interface, the water distributor 12, the water collector 13, the third interface, and the fourth interface are connected in a closed loop via cooling water pipelines to form a waste heat heating system for the data center. The data center 1 The chilled water pump 2 and the refrigerant pump circulation module 24 are connected in a closed loop via chilled water pipelines. The refrigerant pump circulation module 24, the fifth interface, the sixth interface, the cooling tower 17, the seventh interface, the eighth interface, and the second cooling water pump 18 are connected in a closed loop via cooling water pipelines to form a refrigerant pump natural cooling system. The data center 1, the chilled water pump 2, and the vapor compression circulation module 23 are connected in a closed loop via chilled water pipelines. The vapor compression circulation module 23, the first cooling water pump 10, the first interface, the sixth interface, the cooling tower 17, the seventh interface, and the fourth interface are connected in a closed loop via cooling water pipelines to form a vapor compression refrigeration system.

[0045] The vapor compression cycle module 23 is composed of at least a first evaporator 3, a gas-liquid separator 4, a low-pressure switch 5, a compressor 6, a high-pressure switch 7, a first condenser 8, and a throttle valve 9 connected in series in a closed loop through refrigerant pipelines to form a first refrigerant pipeline loop; the data center 1, the chilled water pump 2, and the first evaporator 3 are connected in a closed loop through chilled water pipelines; the outlet of the first condenser 8 is connected to the first cooling water pump 10, and the inlet of the first condenser 8 is connected to the fourth interface.

[0046] The refrigerant pump circulation module 24 is formed by connecting the second evaporator 19, the second condenser 22, the liquid receiver 21, and the refrigerant pump 20 in series in a closed loop, forming a second refrigerant pipeline loop; the data center 1, the chilled water pump 2, and the second evaporator 19 are connected in a closed loop through chilled water pipelines; the outlet of the second condenser 22 is connected to the fifth interface, and the inlet of the second condenser 22 is connected to the refrigerant pump 20.

[0047] As can be seen from the above structure, the connection between the integrated valve assembly and different interfaces on the housing can be achieved by adjusting the integrated valve assembly within the integrated valve module 11, greatly simplifying the control logic. The specific structures of the data center waste heat heating system, the refrigerant pump natural cooling system, and the vapor compression refrigeration system are as follows:

[0048] Data center waste heat heating system, such as Figure 2 As shown, the system includes a data center 1, a chilled water pump 2, a vapor compression cycle module 23, a first cooling water pump 10, an integrated valve module 11, a water distributor 12, and a water collector 13. Chilled water, powered by the chilled water pump 2, flows sequentially through the data center 1, the chilled water pump 2, and the first evaporator 3 in the vapor compression cycle module 23, finally returning to the data center 1 to form a chilled water loop. Cooling water, powered by the first cooling water pump 10, flows sequentially through the outlet of the first condenser 8, the first cooling water pump 10, the first interface, the second interface, the water distributor 12, the water collector 13, the third interface, and the fourth interface in the vapor compression cycle module 23, finally returning to the inlet of the first condenser 8 to form a first cooling water loop. The vapor compression cycle module 23 specifically includes the first evaporator 3, a gas-liquid separator 4, a low-pressure switch 5, a compressor 6, a high-pressure switch 7, the first condenser 8, and a throttle valve 9. Driven by the compressor 6, the refrigerant sequentially passes through the vapor compression cycle module 23 to form a first refrigerant pipe loop. The first refrigerant loop and the chilled water loop exchange heat in countercurrent through the first evaporator 3, and the first refrigerant loop and the first cooling water loop exchange heat in countercurrent through the first condenser 8.

[0049] Fluorine pump natural cooling system, such as Figure 3 As shown, the system includes a data center 1, a chilled water pump 2, a refrigerant pump circulation module 24, an integrated valve module 11, a cooling tower 17, and a second cooling water pump 18. Chilled water, powered by chilled water pump 2, flows sequentially through the data center 1, chilled water pump 2, and the second evaporator 19 in the refrigerant pump circulation module, finally returning to the data center 1, forming a chilled water loop. Cooling water, powered by the second cooling water pump 18, flows sequentially through the outlet of the second condenser 22, the fifth interface, the sixth interface, the cooling tower 17, the seventh interface, the eighth interface, and the second cooling water pump 18 in the refrigerant pump circulation module 24, finally flowing into the inlet of the second condenser 22, forming a third cooling water loop. The refrigerant pump circulation module 24 specifically includes the second evaporator 19, the second condenser 22, a liquid receiver 21, and a refrigerant pump 20, which are connected in series in a closed loop via refrigerant piping, forming a second refrigerant piping loop. The second refrigerant loop and the chilled water loop exchange heat in counter-current flow through the second evaporator 19, and the second refrigerant loop and the third cooling water loop exchange heat in counter-current flow through the second condenser 22. The refrigerant pump natural cooling system uses cooling water provided by the cooling tower 17 to dissipate heat from the second condenser 22. The cooling water temperature is close to the outdoor wet-bulb temperature, which can maintain efficient operation even in transitional seasons, further increasing the duration of natural cooling throughout the year and reducing energy consumption.

[0050] Vapor compression refrigeration system such as Figure 4 As shown, the system includes a data center 1, a chilled water pump 2, a vapor compression circulation module 23, a first cooling water pump 10, an integrated valve module 11, and a cooling tower 17. Chilled water, powered by the chilled water pump 2, flows sequentially through the data center 1, the chilled water pump 2, and the first evaporator 3 in the vapor compression circulation module, finally returning to the data center 1. Cooling water, powered by the first cooling water pump 10, flows sequentially through the outlet of the first condenser 8 in the vapor compression circulation module 23, the first cooling water pump 10, the first interface, the sixth interface, the cooling tower 17, the seventh interface, and the fourth interface, finally flowing into the inlet of the first condenser 8 to form a second cooling water loop. The first refrigerant loop and the chilled water loop exchange heat counter-currently through the first evaporator 3, and the first refrigerant loop and the second cooling water loop exchange heat counter-currently through the first condenser 8.

[0051] The first and second cooling water loops can be combined to form a fourth cooling water loop. For example... Figure 5 As shown, driven by the first cooling water pump 10, cooling water flows sequentially through the outlet of the first condenser 8, the first cooling water pump 10, the first interface, the second interface, the water distributor 12, the water collector 13, the third interface, the sixth interface, the cooling tower 17, the seventh interface, the fourth interface, and the inlet of the first condenser 8 in the vapor compression cycle module 23. The first refrigerant loop and the fourth cooling water loop exchange heat counter-currently through the first condenser 8.

[0052] The first evaporator 3 and the second evaporator 19 are connected in series to the same chilled water loop; the chilled water loop is sequentially connected in a closed loop to the data center 1, the chilled water pump 2, the first evaporator 3, and the second evaporator 19. As can be seen from the above structure, the first evaporator 3 in the vapor compression cycle module 23 and the second evaporator 19 in the refrigerant pump cycle module 24 are connected in series to the same chilled water loop. The chilled water loop sequentially connects the data center 1, the chilled water pump 2, the first evaporator 3 in the vapor compression cycle module 23, the second evaporator 19 in the refrigerant pump cycle module 24, and finally returns to the data center 1. The third cooling water loop in the refrigerant pump natural cooling system and the second cooling water loop in the vapor compression refrigeration system share the cooling tower 17.

[0053] Example 2:

[0054] See attached Figures 1-13Based on Embodiment 1, the integrated valve assembly includes a first four-way valve 14, a second four-way valve 15, and a third four-way valve 16; each of the first four-way valve 14, the second four-way valve 15, and the third four-way valve 16 is provided with a first connecting channel, a second connecting channel, a third connecting channel, and a fourth connecting channel; the first connecting channel, the second connecting channel, and the third connecting channel of the first four-way valve 14 are respectively connected to the first interface, the second interface, and the third interface, and the fourth connecting channel of the first four-way valve 14 is connected to the second connecting channel of the second four-way valve 15; the first connecting channel and the fourth connecting channel of the second four-way valve 15 are respectively connected to the fifth interface and the sixth interface, and the third connecting channel of the second four-way valve 15 is connected to the first connecting channel of the third four-way valve 16; the fourth connecting channel and the third connecting channel of the third four-way valve 16 are respectively connected to the seventh interface and the eighth interface, and the second connecting channel of the third four-way valve 16 is connected to the fourth interface. From the above structure, it can be seen that, as... Figure 1 As shown, the first, second, third, fourth, fifth, sixth, seventh, and eighth interfaces on the integrated valve module 11 can be represented by a to h, respectively; the first four-way valve 14, the second four-way valve 15, and the third four-way valve 16 have the same structure and are all provided with a first connection channel, a second connection channel, a third connection channel, and a fourth connection channel, which can be represented by A, B, C, and D, respectively. Specifically, in the connection process, the A port of the first four-way valve 14 is connected to the a port of the integrated valve module 11, the B port is connected to the b port of the integrated valve module 11, the C port is connected to the c port of the integrated valve module 11, and the D port is connected to the B port of the second four-way valve 15; the A port of the second four-way valve 15 is connected to the e port of the integrated valve module 11, the C port is connected to the A port of the third four-way valve 16, and the D port is connected to the f port of the integrated valve module 11; the B port of the third four-way valve 16 is connected to the d port of the integrated valve module 11, the C port is connected to the h port of the integrated valve module 11, and the D port is connected to the g port of the integrated valve module 11.

[0055] The first four-way valve 14, the second four-way valve 15, and the third four-way valve 16 all include a four-way valve unit; the four-way valve unit includes a valve body 25, a valve core assembly, an operating shaft assembly 26, and a limiting assembly; the valve body 25 extends vertically; the valve body 25 has a first connecting channel, a second connecting channel, a third connecting channel, and a fourth connecting channel evenly arranged along the circumference of the valve body 25 in the radial direction; the operating shaft assembly 26 is fitted inside the valve body 25; the valve core assembly is connected to the operating shaft assembly 26, and the operating shaft assembly 26 and the valve core assembly are coaxially arranged; the valve core assembly includes a first valve core 27, a second valve core 28, and a third valve core 29 connected in sequence; the operating shaft assembly 26 is used to drive the valve core assembly to move vertically and rotate along its own rotation direction to realize the switching of the valve core, the adjustment of the valve core flow path and the flow rate; the limiting assembly includes at least a first limiting member 30 for fixing the operating shaft assembly 26 and the valve body 25. As can be seen from the above structure, the first four-way valve 14, the second four-way valve 15, and the third four-way valve 16 have the same structure, specifically including a valve body 25 and a valve core assembly, with the valve core assembly fitting inside the valve body 25. For example... Figure 6 As shown, the valve body 25 has four connection channels, labeled A, B, C, and D, with the center lines of adjacent connection channels perpendicular to each other. The valve core assembly can include three different types of valve cores, or can be configured according to actual needs. Each valve core includes at least one flow channel, which can also be configured according to actual needs. The size of the flow channel of the valve core is the same as the diameter of the connection channel. After installation, the connection channel portion of the valve body 25 corresponds to one of the valve cores in the valve core assembly. During operation, fluid flows in from a certain interface of the integrated valve module 11, flows into the connection channel of a four-way valve connected thereto, then flows through the flow channel of the valve core, and finally flows out from the remaining connection channel, realizing the function of fluid delivery and flow direction control. The four-way valve provided by this invention also includes an operating shaft assembly 26, which is connected to the valve core assembly. The operating shaft assembly 26 and the valve core assembly can be a single unit, with different valve cores connected sequentially in the vertical direction. During operation, the operating shaft assembly 26 rotates, causing the valve core assembly to rotate synchronously, thereby adjusting the flow path and flow rate of a specific valve core. The operating shaft assembly 26 moves up and down, causing the valve core assembly to move up and down synchronously, thereby switching between different valve cores. For example, the up-and-down movement or rotation of the operating shaft assembly 26 can be controlled by an operating handle. The four-way valve provided by this invention also includes a limiting assembly, which includes at least a first limiting member 30. The first limiting member 30 is used to fix the operating shaft assembly 26 relative to the valve body 25 after it has been adjusted to the correct position. For example, a keyway can be provided on the operating shaft assembly 26, and a limiting key can be used on the valve body 25 to achieve relative fixation between the operating shaft assembly 26 and the valve body 25. The four-way valve provided by this invention can simultaneously achieve switching between different valve cores, connection and conversion of channels, and adjustment of the connection area, thereby regulating the flow direction and flow rate of the inlet and outlet fluids.

[0056] The first valve core 27 has a circular flow channel perpendicular to its central axis; the second valve core 28 has two second arc-shaped flow channels perpendicular to its central axis, and the two second arc-shaped flow channels are symmetrical about the central axis of the second valve core 28; the inlet and outlet center lines of the second arc-shaped flow channels are perpendicular to each other; the third valve core 29 has a third arc-shaped flow channel perpendicular to its central axis; the inlet and outlet center lines of the third arc-shaped flow channel are perpendicular to each other. From the above structure, it can be seen that the valve core assembly provided by the present invention includes a first valve core 27, a second valve core 28, and a third valve core 29 connected sequentially from top to bottom. The first valve core 27, the second valve core 28, and the third valve core 29 can all be cylindrical, and their sizes match the valve body 25. Specifically, as shown... Figure 8 As shown, the first valve core 27 is provided with a circular flow channel 27a perpendicular to the central axis of the first valve core 27, such as... Figure 11 As shown, the first valve core 27 enables 180° single-path flow of fluid. (As indicated...) Figure 9 As shown, the second valve core 28 is provided with two second arc-shaped flow channels, 28a and 28b, perpendicular to the central axis of the second valve core 28. The two second arc-shaped flow channels 28a and 28b are in a plane, symmetrical about the central axis of the second valve core 28, and the center lines of the inlet and outlet of the second arc-shaped flow channels 28a and 28b are perpendicular to each other; Figure 12 As shown, the second valve core 28 enables dual-path fluid flow. (As indicated...) Figure 10 As shown, the third valve core 29 is provided with a third arc-shaped flow channel 29a perpendicular to the central axis of the third valve core 29, and the inlet and outlet center lines of the third arc-shaped flow channel 29a are perpendicular to each other; as shown Figure 13 As shown, the third valve core 29 enables 90° single-path fluid flow. The circular flow channel 27a, the second arc-shaped flow channels 28a and 28b, and the third arc-shaped flow channel 29a are the same size as the connecting channel. By adjusting the operating shaft assembly 26, the switching of different valve cores, the connection and conversion of channels, and the adjustment of the connection area can be realized, thereby realizing the connection between different interfaces of the integrated valve module 11 and the different connecting channels of the first four-way valve 14, the second four-way valve 15, and the third four-way valve 16, and thus switching between different subsystems.

[0057] Example 3:

[0058] See attached Figures 1-13Based on Example 2, the control method for the integrated cooling and heating refrigerant pump heat recovery system in the data center adopts the aforementioned integrated cooling and heating refrigerant pump heat recovery system. By switching the integrated valve assembly, five operating modes can be obtained: data center waste heat heating, refrigerant pump natural cooling, vapor compression refrigeration, combined operation of data center waste heat heating and refrigerant pump natural cooling, and combined operation of data center waste heat heating and vapor compression refrigeration. As can be seen from the above structure, in order to meet the year-round cooling and user heating needs of data center 1, it is necessary to control the flow path of the integrated valve module 11 to achieve switching or simultaneous operation between subsystems. Specifically:

[0059] During cold winters and low-temperature transitional seasons, and when the waste heat provided by Data Center 1 is less than the heat demand of users, the waste heat heating system of the data center can be operated independently, such as... Figure 2 As shown. Waste hot water output from the data center 1 is used to recover heat from the waste hot water by the vapor compression circulation module 23. After improving the temperature and quality, it is released into the first cooling water loop in the first condenser 8, and the first cooling water loop circulates to provide heating to users. Specifically, chilled water pump 2, compressor 6, and first cooling water pump 10 are turned on; within the integrated valve module 11, the first four-way valve 14 is adjusted to an AB / CD dual-channel mode, i.e., the AB and CD channels are connected; the second four-way valve 15 is adjusted to connect the BC channel and close the other channels; the third four-way valve 16 is adjusted to connect the AB channel and close the other channels; the refrigerant pump 20, second cooling water pump 18, and cooling tower 17 are turned off. The low-temperature waste hot water output from the data center 1 is cooled by the first evaporator 3 under the drive of the chilled water pump 2 and returns to the data center 1 to absorb heat from the data center 1, meeting the cooling needs of the data center 1. In the first refrigerant loop, the refrigerant absorbs waste heat from the chilled water loop in the first evaporator 3, transforming into a low-temperature, low-pressure gaseous state. After passing through the gas-liquid separator 4, it enters the compressor 6, where it transforms into a high-temperature, high-pressure gaseous state. Then, it enters the first condenser 8, condensing into a high-temperature, high-pressure liquid state. Finally, it passes through the expansion valve 9, transforming into a low-temperature, low-pressure liquid state and returning to the first evaporator 3. The low-pressure switch 5 and the high-pressure switch 7 ensure the safe operation of the compressor 6. Heat is released to the first cooling water loop in the first condenser 8. The hot water in the first cooling water loop, driven by the first cooling water pump 10, is distributed to user terminals by the distributor 12. After cooling and heating the users, the cooling water is collected by the collector 13 and returned to the first condenser 8 to reheat, completing the cycle. All waste heat from the data center 1 is recovered to provide heating for users.

[0060] During cold winters and low-temperature transitional seasons, when the waste heat provided by Data Center 1 exceeds the heat demand of users, the data center waste heat heating system and the refrigerant pump natural cooling system operate simultaneously. Figure 1As shown. Waste hot water output from the data center 1 is used to recover heat from the waste hot water by the vapor compression circulation module 23. After improving the temperature and quality, it is released into the first cooling water loop in the first condenser 8, which then circulates to provide heating to users. After recovering the waste heat from the data center to provide heating, the remaining waste heat load is handled by the refrigerant pump natural cooling system using natural cold sources. The first four-way valve 14 is adjusted to AB, CD dual-flow mode, the second four-way valve 15 is adjusted to AD, BC dual-flow mode, and the third four-way valve 16 is adjusted to AB, DC dual-flow mode; chilled water pump 2, compressor 6, first cooling water pump 10, refrigerant pump 20, second cooling water pump 18, and cooling tower 17 are activated. The low-temperature waste hot water output from the data center 1 is driven by the chilled water pump 2 through the first evaporator 3 and then through the data center waste heat heating system. After the first cooling, it enters the second evaporator 19, where the refrigerant pump natural cooling system performs a second cooling, eliminating the waste heat in the unrecovered chilled water and meeting the cooling needs of data center 1. In addition to the operation of the vapor compression cycle module 23, which recovers waste heat and releases it to the first cooling water loop for heating, the refrigerant pump cycle module 24 also operates. In the second refrigerant loop, the refrigerant absorbs waste heat from the chilled water in the second evaporator 19 and converts into a gaseous state. In the second condenser 22, it releases heat to the third cooling water loop, condenses into a liquid state, passes through the liquid receiver 21, and is driven back to the first evaporator 3 by the refrigerant pump 20, completing the cycle. Heat in the third cooling water loop is discharged outdoors by the cooling tower 17.

[0061] During the warmer transitional seasons and hot summer months, when heat users have heating needs, the data center waste heat heating system and the vapor compression refrigeration system operate simultaneously, such as... Figure 5 As shown. Waste hot water output from the data center 1 is heated by the first evaporator 3, and after a vapor compression thermodynamic cycle, it releases heat into the fourth cooling water loop in the first condenser 8. After the fourth cooling water loop provides heating to users, it enters the cooling tower 17 to discharge the remaining condensation heat outdoors. Specifically, the first four-way valve 14 in the integrated valve module 11 is adjusted to an AB / CD dual-channel mode; the second four-way valve 15 is adjusted to have the BD channel open and other channels closed; and the third four-way valve 16 is adjusted to have the DB channel open and other channels closed. The chilled water pump 2, compressor 6, first cooling water pump 10, and cooling tower 17 are turned on; the refrigerant pump 20 and second cooling water pump 18 are turned off. The low-temperature waste hot water output from the data center 1 is cooled by the first evaporator 3 under the drive of the chilled water pump 2 and returns to the data center 1 to dissipate waste heat. After the vapor compression cycle module 23 eliminates the waste heat of the data center, it releases heat to the fourth cooling water loop in the first condenser 8. The fourth cooling water loop first passes through the water distributor 12 and the water collector 13 to provide heating for the heat users, and then enters the cooling tower 17 for further cooling before returning to the first condenser 8.

[0062] During the warmer transitional seasons and hot summer months, when heat users have no heating needs, the vapor compression refrigeration mode can be operated independently, such as... Figure 4 As shown. Waste hot water output from the data center 1 is cooled by the first evaporator 3, and after vapor compression thermodynamic circulation, it releases heat to the second cooling water loop in the first condenser 8. The heat in the second cooling water loop is discharged to the outdoor environment by the cooling tower 17. Specifically, the first four-way valve 14 in the integrated valve module 11 is adjusted to open the AD flow channel and close the other flow channels, the second four-way valve 15 is adjusted to open the BD flow channel and close the other flow channels, and the third four-way valve 16 is adjusted to open the DB flow channel and close the other flow channels; the chilled water pump 2, compressor 6, first cooling water pump 10, and cooling tower 17 are turned on; the refrigerant pump 20 and second cooling water pump 18 are turned off. The low-temperature waste hot water output from the data center 1 is cooled by the first evaporator 3 under the drive of the chilled water pump 2 and returns to the data center 1 to eliminate waste heat. After the vapor compression circulation module 23 eliminates the waste heat of the data center, it releases heat to the second cooling water loop in the first condenser 8. The heat in the second cooling water loop is discharged to the outdoor environment by the cooling tower 17. At this time, the waste heat load of the data center is borne solely by the vapor compression refrigeration system.

[0063] Example 4:

[0064] See attached Figures 1-13 Based on Example 3, the supply and return water temperatures for the data center are set to 7 / 15°C, and the supply and return water temperatures for heat users are set to 45 / 40°C. The system operating temperature thresholds are shown in Table 1.

[0065] Table 1 Switching Temperature Thresholds for Each System

[0066]

[0067] Taking a small data center with 268 standard racks in Beijing and surrounding residential areas as an example, a mathematical model was established for the data center, residential units, and system, and calculations and analyses were performed. The results show that the system provided by this invention can recover 23.25% of the waste heat from the data center, meeting the heating needs of 8820 square meters of residential space. Compared with traditional systems that rely entirely on vapor compression refrigeration, it can save 167,747.383 kWh of electricity annually, reduce CO2 emissions by 152.08 tons, and achieve an energy saving rate of 15.146%. If calculated based on 4851 small data centers nationwide, the waste heat could meet the heating needs of 42.7858 million square meters, saving 8.137 × 10⁻⁶ kWh of electricity. 5 Each megawatt-hour can reduce CO2 emissions by 737.74 kilotons, demonstrating significant energy-saving effects and economic benefits.

[0068] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A data center integrated cooling and heating fluorine pump heat recovery system, characterized in that: It includes a data center waste heat heating system, a fluorine pump natural cooling system and a vapor compression refrigeration system; the data center waste heat heating system is used to recover waste heat from the data center return water and increase the waste heat temperature to provide heating to heat users; the fluorine pump natural cooling system and the vapor compression refrigeration system are both used to absorb waste heat from the data center return water and provide cooling capacity to the data center (1) to meet the cooling needs of the data center (1) under different operating conditions throughout the year. The data center waste heat heating system includes a data center (1), a chilled water pump (2), a vapor compression circulation module (23), a first cooling water pump (10), an integrated valve module (11), a water distributor (12), and a water collector (13); the refrigerant pump natural cooling system includes a data center (1), a chilled water pump (2), a refrigerant pump circulation module (24), an integrated valve module (11), a cooling tower (17), and a second cooling water pump (18); the vapor compression refrigeration system includes a data center (1), a chilled water pump (2), a vapor compression circulation module (23), a first cooling water pump (10), an integrated valve module (11), and a cooling tower (17); The integrated valve module (11) includes a housing and an integrated valve assembly disposed within the housing. The housing is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, and an eighth interface for connecting to the integrated valve assembly. The integrated valve assembly includes a first four-way valve (14), a second four-way valve (15), and a third four-way valve (16). The first four-way valve (14), the second four-way valve (15), and the third four-way valve (16) are each provided with a first connection channel, a second connection channel, a third connection channel, and a fourth connection channel. The first four-way valve (14) has a first connection channel, a second connection channel, a third connection channel, and a fourth connection channel. The connecting channel and the third connecting channel are respectively connected to the first interface, the second interface, and the third interface; the fourth connecting channel of the first four-way valve (14) is connected to the second connecting channel of the second four-way valve (15); the first connecting channel and the fourth connecting channel of the second four-way valve (15) are respectively connected to the fifth interface and the sixth interface; the third connecting channel of the second four-way valve (15) is connected to the first connecting channel of the third four-way valve (16); the fourth connecting channel and the third connecting channel of the third four-way valve (16) are respectively connected to the seventh interface and the eighth interface; the second connecting channel of the third four-way valve (16) is connected to the fourth interface. The data center (1), chilled water pump (2) and vapor compression circulation module (23) are connected in a closed loop through chilled water pipelines. The vapor compression circulation module (23), first cooling water pump (10), first interface, second interface, water distributor (12), water collector (13), third interface and fourth interface are connected in a closed loop through cooling water pipelines to form a waste heat heating system for the data center. The vapor compression cycle module (23) is formed by connecting the first evaporator (3), gas-liquid separator (4), low-pressure switch (5), compressor (6), high-pressure switch (7), first condenser (8) and throttle valve (9) in series in a closed loop through refrigerant pipelines to form a first refrigerant pipeline loop; the data center (1), chilled water pump (2) and first evaporator (3) are connected in a closed loop through chilled water pipelines; the outlet of the first condenser (8) is connected to the first cooling water pump (10), and the inlet of the first condenser (8) is connected to the fourth interface.

2. The data center integrated cooling and heating fluorine pump heat recovery system according to claim 1, characterized in that: The data center (1), chilled water pump (2) and fluorine pump circulation module (24) are connected in a closed loop through chilled water pipelines. The fluorine pump circulation module (24), fifth interface, sixth interface, cooling tower (17), seventh interface, eighth interface and second cooling water pump (18) are connected in a closed loop through cooling water pipelines to form a fluorine pump natural cooling system. The data center (1), chilled water pump (2) and vapor compression cycle module (23) are connected in a closed loop through chilled water pipelines. The vapor compression cycle module (23), first cooling water pump (10), first interface, sixth interface, cooling tower (17), seventh interface and fourth interface are connected in a closed loop through cooling water pipelines to form a vapor compression refrigeration system.

3. The data center integrated cooling and heating fluorine pump heat recovery system according to claim 2, characterized in that: The refrigerant pump circulation module (24) is formed by connecting the second evaporator (19), the second condenser (22), the liquid receiver (21) and the refrigerant pump (20) in series in a closed loop, forming a second refrigerant pipeline loop; the data center (1), the chilled water pump (2) and the second evaporator (19) are connected in a closed loop through the chilled water pipeline; the outlet of the second condenser (22) is connected to the fifth interface, and the inlet of the second condenser (22) is connected to the second cooling water pump (18).

4. The data center integrated cooling and heating fluorine pump heat recovery system according to claim 3, characterized in that: The first evaporator (3) and the second evaporator (19) are connected in series to the same chilled water loop; the chilled water loop is connected in series in a closed loop to the data center (1), the chilled water pump (2), the first evaporator (3) and the second evaporator (19).

5. The data center integrated cooling and heating fluorine pump heat recovery system according to claim 2, characterized in that: The first four-way valve (14), the second four-way valve (15) and the third four-way valve (16) all include a four-way valve unit; The four-way valve unit includes a valve body (25), a valve core assembly, an operating shaft assembly (26), and a limiting assembly; the valve body (25) extends in the vertical direction; the valve body (25) is provided with a first connecting channel, a second connecting channel, a third connecting channel, and a fourth connecting channel evenly arranged along the circumference of the valve body (25) in the radial direction; the operating shaft assembly (26) is fitted inside the valve body (25); the valve core assembly is connected to the operating shaft assembly (26), and the operating shaft assembly (26) and the valve core assembly are coaxially arranged; the valve core assembly includes a first valve core (27), a second valve core (28), and a third valve core (29) connected in sequence; the operating shaft assembly (26) is used to drive the valve core assembly to move up and down and rotate along its own rotation direction to realize the switching of the valve core, the adjustment of the valve core flow path and the flow rate; the limiting assembly includes at least a first limiting member (30) for fixing the operating shaft assembly (26) and the valve body (25).

6. The data center integrated cooling and heating fluorine pump heat recovery system according to claim 5, characterized in that: The first valve core (27) is provided with a circular flow channel perpendicular to the central axis of the first valve core (27); the second valve core (28) is provided with two second arc-shaped flow channels perpendicular to the central axis of the second valve core (28), and the two second arc-shaped flow channels are symmetrical about the central axis of the second valve core (28); the inlet and outlet center lines of the second arc-shaped flow channels are perpendicular to each other; the third valve core (29) is provided with a third arc-shaped flow channel perpendicular to the central axis of the third valve core (29); the inlet and outlet center lines of the third arc-shaped flow channel are perpendicular to each other.

7. A control method for a data center integrated cooling and heating fluorine pump heat recovery system, characterized in that: The data center integrated heating and cooling fluorine pump heat recovery system as described in any one of claims 2 to 6 can be used to obtain five operating modes by switching the integrated valve assembly: data center waste heat heating, fluorine pump natural cooling, vapor compression refrigeration, combined operation of data center waste heat heating and fluorine pump natural cooling, and combined operation of data center waste heat heating and vapor compression refrigeration.

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