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CN-117109201-B - Cold and hot integrated fluorine pump heat recovery system of data center and control method thereof

CN117109201BCN 117109201 BCN117109201 BCN 117109201BCN-117109201-B

Abstract

The invention discloses a cold and hot integrated fluorine pump heat recovery system of a data center and a control method thereof, belonging to the technical field of energy conservation, and comprising a data center waste heat heating system, a fluorine pump natural cooling system and a vapor compression refrigeration system; the fluorine pump natural cooling system and the vapor compression refrigerating system are both used for absorbing the waste heat in the backwater of the data center, and provide cooling capacity for the data center so as to meet the cooling requirements of the data center under different working conditions within the annual time range. According to the invention, under the condition of meeting the requirements of data center refrigeration and heat user heating, the waste heat of the data center and the outdoor natural cold source are fully utilized, so that the cooling energy consumption of the data center is further reduced. In addition, the invention also uses the integrated valve which can meet the requirements of variable working conditions and multi-mode operation of the system, reduces the number of the valves and the control difficulty and is convenient for system installation and management.

Inventors

  • ZHOU FENG
  • SONG YU
  • MA GUOYUAN

Assignees

  • 北京工业大学

Dates

Publication Date
20260508
Application Date
20230824

Claims (7)

  1. 1. The heat recovery system of the cold and hot integrated fluorine pump of the data center is characterized by comprising a data center waste heat heating system, a fluorine pump natural cooling system and a vapor compression refrigerating system, wherein the data center waste heat heating system is used for recovering waste heat from backwaters of the data center and improving the temperature of the waste heat to heat users; The data center waste heat heating system comprises 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 separator (12) and a water collector (13), wherein the fluorine pump natural cooling system comprises the data center (1), the chilled water pump (2), a fluorine pump circulation module (24), the integrated valve module (11), a cooling tower (17) and a second cooling water pump (18), and the vapor compression refrigeration system comprises the data center (1), the chilled water pump (2), the vapor compression circulation module (23), the first cooling water pump (10), the integrated valve module (11) and the cooling tower (17); The integrated valve module (11) comprises a shell and an integrated valve assembly arranged in the shell, wherein the shell 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 which are connected with the integrated valve assembly, the integrated valve assembly comprises 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 respectively 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, the third connecting channel of the first four-way valve (14) are respectively connected with the first interface, the second interface, the third interface, the fourth connecting channel of the first four-way valve (14) and the second connecting channel of the second four-way valve (15), the first connecting channel, the fourth connecting channel of the fourth four-way valve (15) are respectively connected with the fifth connecting channel, the third connecting channel of the fourth four-way valve (16) and the fourth connecting channel of the fourth four-way valve (16); the data center (1), the chilled water pump (2) and the vapor compression circulation module (23) are connected in a closed loop through a chilled water pipeline, and the vapor compression circulation module (23), the first cooling water pump (10), the first interface, the second interface, the water separator (12), the water collector (13), the third interface and the fourth interface are connected in a closed loop through a cooling water pipeline to form a data center waste heat heating system; The vapor compression circulation module (23) is formed by sequentially connecting 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) in series through refrigerant pipelines in a closed loop mode, a first refrigerant pipe loop is formed, the data center (1), the chilled water pump (2) and the first evaporator (3) are connected through the chilled water pipeline in a closed loop mode, the water outlet of the first condenser (8) is connected with the first cooling water pump (10), and the water inlet of the first condenser (8) is connected with a fourth interface.
  2. 2. The cold and hot integrated fluorine pump heat recovery system of the data center according to claim 1, wherein the data center (1), the chilled water pump (2) and the fluorine pump circulation module (24) are connected in a closed loop through a chilled water pipeline, and the fluorine 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 through a cooling water pipeline to form a natural cooling system of the fluorine pump; The data center (1), the chilled water pump (2) and the vapor compression circulation module (23) are connected in a closed loop through a chilled water pipeline, and 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 through a cooling water pipeline to form a vapor compression refrigeration system.
  3. 3. The heat recovery system of the cold and hot integrated fluorine pump of the data center according to claim 2, wherein the fluorine pump circulation module (24) is formed by sequentially connecting a second evaporator (19), a second condenser (22), a liquid reservoir (21) and a fluorine pump (20) in series and closing a loop through refrigerant pipelines to form a second refrigerant pipe loop, the data center (1), the chilled water pump (2) and the second evaporator (19) are connected in a closed loop through a chilled water pipeline, a water outlet of the second condenser (22) is connected with a fifth interface, and a water inlet of the second condenser (22) is connected with a second cooling water pump (18).
  4. 4. The cold and hot integrated fluorine pump heat recovery system of the data center according to claim 3, wherein the first evaporator (3) and the second evaporator (19) are connected in series to the same chilled water loop, and the chilled water loop is sequentially connected with the data center (1), the chilled water pump (2), the first evaporator (3) and the second evaporator (19) in series in a closed loop.
  5. 5. The heat recovery system of a cold and hot integrated fluorine pump for a data center according to claim 2, wherein the first four-way valve (14), the second four-way valve (15) and the third four-way valve (16) comprise four-way valve units; The four-way valve unit comprises a valve body (25), a valve core assembly, an operation shaft assembly (26) and a limiting assembly, wherein the valve body (25) extends in the up-down direction, a first connecting channel, a second connecting channel, a third connecting channel and a fourth connecting channel are uniformly arranged along the circumference of the valve body (25) in the radial direction of the valve body (25), the operation shaft assembly (26) is matched in the valve body (25), the operation shaft assembly (26) is connected with the valve core assembly, the operation shaft assembly (26) and the valve core assembly are coaxially arranged, the valve core assembly comprises a first valve core (27), a second valve core (28) and a third valve core (29) which are sequentially connected, the operation shaft assembly (26) is used for driving the valve core assembly to move up-down and rotate in the rotation direction, so that the valve core is switched, the valve core flow path and the flow are regulated, and the limiting assembly at least comprises a first limiting piece (30) used for fixing the operation shaft assembly (26) and the valve body (25).
  6. 6. The heat recovery system of a cold and hot integrated fluorine pump of a data center, as set forth in claim 5, wherein the first valve core (27) is provided with a circular circulation channel perpendicular to the central axis of the first valve core (27), the second valve core (28) is provided with two second arc circulation channels perpendicular to the central axis of the second valve core (28), the two second arc circulation channels are symmetrical with respect to the central axis of the second valve core (28), the inlet center line and the outlet center line of the second arc circulation channels are perpendicular, the third valve core (29) is provided with a third arc circulation channel perpendicular to the central axis of the third valve core (29), and the inlet center line and the outlet center line of the third arc circulation channel are perpendicular.
  7. 7. The control method of the data center cold and hot integrated fluorine pump heat recovery system is characterized in that the data center cold and hot integrated fluorine pump heat recovery system according to any one of claims 2 to 6 is adopted, and five operation modes of data center waste heat heating, fluorine pump natural cooling, vapor compression refrigeration, data center waste heat heating and fluorine pump natural cooling combined operation and data center waste heat heating and vapor compression refrigeration combined operation can be obtained through switching an integrated valve assembly.

Description

Cold and hot integrated fluorine pump heat recovery system of data center and control method thereof Technical Field The invention relates to the technical field of energy conservation, in particular to a data center cold and hot integrated fluorine pump heat recovery system and a control method thereof. Background With the development of global networking and informatization, computing power is becoming a new productivity, providing basic power for thousands of industries and hundreds of industries digital transformation, and China is actively guiding the development of data center industry, so that the market scale of the data center is continuously enlarged. While data centers are growing in size, energy consumption problems are increasingly prominent. It is known that the electricity consumption of the data center in China breaks through 2000 hundred million kilowatt-hours in 2020 and accounts for 2.71% of the electricity consumption of the society, and the ratio of 2023 is expected to reach 3.6%. The electric quantity consumed by the data center is finally converted into waste heat and is discharged outdoors by the air conditioning system, so that not only is huge waste of the waste heat of the data center caused, but also huge energy consumption of the air conditioning system is caused. On the other hand, along with the rapid development of the building scale in China and the improvement of the living standard of people, the building energy consumption accounts for more than 30% of the total social energy consumption, and serious environmental pollution is brought, and the development of a clean, efficient and renewable building heat supply mode becomes a social problem to be solved urgently. If the waste heat of the data center is recycled into building heating, the energy consumption and the environmental pollution caused by the cooling and building heating requirements of the data center can be reduced to a certain extent. In the prior art, in order to improve the energy utilization efficiency of a data center, the waste heat of the data center is generally utilized to provide domestic hot water, heat, and the like for users. For example, chinese patent CN 109579107B discloses a waste heat heating system for a data center, which includes a water chiller, a conventional heat pump and a high-temperature heat pump, wherein the system absorbs waste heat from chilled water in the data center through an evaporator in the water chiller, and heats the heat supply network backwater for the first time in a condenser after thermodynamic cycle, and the normal-temperature heat pump evaporator recovers the waste heat from the data center, heats the heat supply network backwater for the second time in the condenser, and heats the heat supply network backwater for the third time through the high-temperature heat pump, and then supplies hot water to a building. The system enlarges the temperature difference between water supply and water return, and improves the temperature of water supply of the heat supply network, the external heat supply capacity and the energy utilization efficiency. However, the prior art has the problems that: 1. the system has the advantages that the waste heat recovery part, namely the water chilling unit and the conventional heat pump, independently operates, multiple ports are needed to be connected during installation, meanwhile, two heat pump systems and one water chilling unit are arranged in the system, all the subsystems independently operate, the problems of complex regulation and control, high requirements on personnel and the like exist, in addition, in non-heating seasons, the system utilizes the water chilling unit to cool the data center, natural cold sources are not fully utilized, the energy consumption is huge, and the annual cooling and user heating requirements of the data center cannot be met. 2. The existing data center waste heat heating system is switched by opening and closing valves in all modes, however, the valves are more in quantity and distributed, so that the complexity of valve control is increased, and the laying difficulty of pipelines and control lines is also increased. For example, chinese patent CN 116193809A discloses a multi-energy complementary multi-source heat recovery air conditioning system for a data center, which has 27 valves in total and is distributed, resulting in complex system control and high difficulty in laying pipelines and control lines. 3. The existing part of data center waste heat heating system has higher site selection requirement on the data center, for example, china patent with the document number of CN201611180037.2 discloses a system and a method for cooling and recovering waste heat by utilizing tap water for waste heat of the data center, and the system fully utilizes a tap water group for cooling and recovering waste heat, is simple, but is only suitable for the data center close to a tap water plant. Disclosure of Inven