Data room heat recovery comprehensive utilization system
By introducing heat pump units and high-temperature heat storage tanks into the data room, the problem of low-temperature cooling water thermal energy is solved, and the reuse of heat and energy saving is achieved. It is suitable for data room and urban heating hot water supply.
Patent Information
- Application Number
- CN202421687023.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the existing data room refrigeration system, the heat energy of low-temperature cooling water is not effectively utilized, resulting in waste of heat.
A comprehensive heat recovery and utilization system for data room is designed. The low-temperature cooling water is heated through the heat pump unit and used as a low-temperature heat source for high-temperature hot water to replace or reduce the operating load of the cooling tower, and the hot water is stored and reused through the high-temperature heat storage tank.
It realizes the reuse of low-temperature heat sources, reduces energy consumption, improves the taste and heat range of hot water, and is suitable for urban central heating and hot water supply.
Smart Images
Figure CN223005140U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of energy conservation, and particularly relates to a comprehensive utilization system for heat recovery in a data computer room. Background Art
[0002] In a big data computer room, data equipment is installed with a high density, and the heat dissipated during the operation of the equipment is large. An air-conditioning refrigeration system is a standard configuration in the data computer room, which has the characteristics of high refrigeration requirements, large refrigeration load, and long cooling time. The power consumption of air-conditioning refrigeration accounts for more than 70% of the operating energy consumption cost of the big data computer room, and it needs to operate 365 days a year. In order to effectively reduce the energy consumption of the data computer room and reduce greenhouse gas emissions, energy-saving transformation is carried out on the existing refrigeration system. Currently, a relatively good energy-saving system designed for the data computer room is as Figure 1 shown. In spring, summer, and autumn, a circulating cooling water at 7 / 12 °C is prepared by an air-conditioning refrigeration unit as a cold source to meet the cooling requirements of the data computer room. In winter, a closed cooling tower is combined with the refrigeration unit to provide a cold source for the data computer room, so that natural cold sources can be fully utilized and energy consumption can be reduced.
[0003] However, the current problem is that during the refrigeration process of the refrigeration unit throughout the year, although the cooling water generated is heated after heat exchange, due to its low grade, it cannot be directly applied. Instead of being recycled, it is transported to the cooling tower by a cooling circulation pump and discharged into the atmosphere, resulting in energy waste. Content of the Utility Model
[0004] Aiming at the deficiencies of the prior art, the technical problem solved by the utility model is to provide a comprehensive utilization system for heat recovery in a data computer room, so as to solve the problem that the heat energy of the low-temperature cooling water in the existing data computer room refrigeration system is not utilized, resulting in heat waste.
[0005] To solve the above problems, the technical solution adopted by the utility model is: a comprehensive utilization system for heat recovery in a data computer room, including an air conditioner in the data computer room, a refrigeration unit, a heat pump unit, and a high-temperature heat storage tank. The air-conditioning refrigeration circulation pipeline in the data air-conditioning computer room is respectively connected to the refrigeration unit and the heat pump unit. The cooling circulation pipeline on the evaporator side of the heat pump unit is also connected to the cooling circulation pipeline of the refrigeration condenser of the refrigeration unit. The high-temperature heat storage tank is connected to the heat exchange medium circulation pipeline of the heat pump condenser of the heat pump unit.
[0006] The beneficial effects of this solution are as follows: By setting up a heat pump unit, when the original refrigeration unit in the data center air conditioning system provides a cold source for the data center, the cooling water pipe can be connected, and the cooling water after heat exchange and temperature rise is sent to the evaporation side as the low-temperature heat source for the heat pump unit to produce high-temperature hot water. At the same time, it can replace the operation of the cooling tower or reduce the operation load of the cooling tower, thus realizing the reuse of the low-temperature heat source. It can also be connected to the circulating pipeline of the data center. The evaporator of the heat pump unit directly recovers heat energy from the data center as the low-temperature heat source for the heat pump unit to produce high-temperature hot water, and can replace the operation of the original refrigeration unit and the cooling tower or reduce the operation load.
[0007] The circulating medium of the heat pump unit recovers the low-temperature heat energy of the data center air conditioning equipment or refrigeration unit on the evaporator side. The circulating medium is compressed into a high-temperature and high-pressure gas by the compressor and released to the condenser of the heat pump unit. The circulating medium releases heat on the condenser side to prepare high-temperature hot water and sends it into the high-temperature heat storage tank to store the high-temperature hot water.
[0008] The heat pump unit has the characteristics of high exhaust pressure and high outlet water temperature. It can raise the cooling water temperature to above 65 - 70 °C. The improvement of the hot water quality increases the heat utilization range and can be used for central heating and hot water supply in cities.
[0009] Furthermore, the heat pump condenser includes a first condenser and a second condenser connected in series. The heat exchange medium circulating pipeline of the second condenser is connected to a cooling tower. Multistage heat exchange is achieved through two condensers connected in series. The circulating medium enters the second condenser after the temperature drops after heat exchange in the first condenser and exchanges heat with the circulating water of the cooling tower. When the heat consumption of the air conditioning and hot water users in the heat storage tank is small, the circulating medium directly enters the first condenser from the low-temperature heat storage tank to obtain high-temperature cooling water and then enters the high-temperature heat storage tank. The low-grade heat in the second condenser is discharged to the outside through the cooling tower for energy-saving operation. When the heat consumption of the air conditioning and hot water users in the heat storage tank is large, the circulating medium enters the second condenser for initial temperature rise from the low-temperature heat storage tank and then enters the first condenser to obtain high temperature and then enters the high-temperature heat storage tank.
[0010] Furthermore, it also includes a low-temperature heat storage tank. The low-temperature outlet water pipe of the low-temperature heat storage tank is connected to the inlet of the heat exchange medium circulating pipeline of the first condenser, and the high-temperature heat storage tank is connected to the outlet of the heat exchange medium circulating pipeline of the first condenser. The outlet of the high-temperature heat storage tank is connected to the heat inlet water pipe of the air conditioning user unit, and the heat outlet water pipe of the air conditioning user unit is connected to the low-temperature heat storage tank.
[0011] The heat exchange medium in the low-temperature heat storage tank is transported to the condenser of the heat pump unit for heat exchange. The obtained high-temperature hot water is stored in the high-temperature heat storage tank and used for central heating and hot water supply for users through air conditioning. After the air conditioning user unit consumes heat, the low-temperature water returns to the low-temperature heat storage tank and then enters the heat pump unit for cyclic heating, repeating the heat generation and heat dissipation process. Thus, winter heating for surrounding residential and commercial buildings is realized.
[0012] Furthermore, first valves are provided on both the water inlet pipe and the water return pipe of the cooling tower. The condensed water outlet pipe of the second condenser is connected to the inlet of the heat exchange medium circulation pipeline of the first condenser through a water outlet switching pipe, and the condensed water inlet pipe of the second condenser is connected to the low-temperature water outlet pipe of the low-temperature heat storage tank through a water inlet switching pipe. Second valves are provided on both the water inlet switching pipe and the water outlet switching pipe.
[0013] When the loads of central heating and hot water supply are large, the first valves are closed and the second valves are opened, so that the water inlet switching pipe is communicated with the low-temperature water outlet pipe, and the water outlet switching pipe connects the second condenser with the first condenser. Thus, the low-temperature hot water in the low-temperature heat storage tank can be heated once through heat exchange in the second condenser and then heated twice in the first condenser, realizing multi-stage rapid heating of the low-temperature water, increasing the outlet water temperature, and enabling the heat pump unit to produce heat energy at full load.
[0014] Furthermore, the water outlet switching pipe is connected to one end of the low-temperature water outlet pipe close to the first condenser, the low-temperature water outlet pipe is connected to the water inlet pipe of the first condenser, and a third valve is provided on the low-temperature water outlet pipe between the water inlet switching pipe and the water outlet switching pipe. After the first valve is closed, the flow rate of the low-temperature water entering the water inlet switching pipe and directly sent into the heat exchange medium circulation pipeline of the first condenser can be controlled by adjusting the third valve, that is, the water volume of the low-temperature water entering the first condenser and the second condenser respectively can be controlled.
[0015] Furthermore, a heat exchanger is connected in series on the condensed water outlet pipe of the heat exchange medium circulation pipeline of the second condenser through a heat exchange pipeline. A fourth valve is provided on the heat exchange pipeline. The inlet of the heat absorption pipeline on the other side of the heat exchanger is connected to tap water, and the outlet of the heat absorption pipeline is connected to the low-temperature heat storage tank through a make-up water pipe.
[0016] When the low-temperature heat storage tank needs to be replenished with water, the fourth valve is opened. Tap water is heated after heat exchange with the circulating medium of the second condenser through the heat exchanger, realizing preheating of the tap water. The preheated tap water is sent into the low-temperature heat storage tank for water replenishment.
[0017] Furthermore, the heat pump evaporation unit is connected to the air-conditioning user unit through a refrigeration branch. In summer, the heat pump unit can provide cooling for public buildings such as offices and hotels, and at the same time recover the heat generated by refrigeration through the first condenser and the second condenser to provide high-temperature hot water for hot water users.
[0018] Furthermore, the high-temperature heat storage tank is also connected to a hot water user unit through a pipeline. The high-temperature heat storage tank can provide heating for air-conditioning users in winter and also provide hot water for hot water users. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is an existing energy-saving system for a data room.
[0020] Figure 2Schematic diagram of an embodiment of the utility model
[0021] Figure 3 It is a partial schematic diagram of a heat energy storage and supply system. Specific implementation manners
[0022] The following is a further detailed description through specific implementation manners:
[0023] The reference numerals in the accompanying drawings of the specification include: data center air conditioner 10, air-conditioning refrigeration cycle pipeline 11, refrigeration unit 20, first cooling tower 21, closed cooling tower 22, heat pump unit 30, evaporator 31, first condenser 32, second condenser 33, inlet switching pipe 331, outlet switching pipe 332, second valve 333, second cooling tower 34, first valve 341, high-temperature heat storage tank 40, low-temperature heat storage tank 50, low-temperature outlet water pipe 51, third valve 511, make-up water pipe 52, heat exchanger 53, heat exchange pipeline 54, fourth valve 541, air-conditioning user unit 60, refrigeration branch pipe 61, heat-using pipeline 62.
[0024] Basically as shown in the appendix Figure 2 Shown: A comprehensive utilization system for heat recovery in a data center includes a heat energy grade improvement and refrigeration system and a heat energy storage and supply system. Among them, the heat energy grade improvement and refrigeration system includes a data center air conditioner 10, a refrigeration unit 20, a heat pump unit 30, and a high-temperature heat storage tank 40. The refrigeration unit 20 is connected to a first cooling tower 21. The air-conditioning refrigeration cycle pipeline 11 of the data center air conditioner is respectively connected to the cooling cycle pipeline of the evaporator 31 of the refrigeration unit 20 and the heat pump unit 30. The cooling cycle pipeline of the evaporator 31 of the heat pump unit 30 is also connected to the cooling cycle pipeline of the refrigeration condenser of the refrigeration unit 20. The cooling cycle pipeline of the evaporator 31 of the heat pump unit 30 is also connected to the air-conditioning user unit 60 through a refrigeration branch pipe; the high-temperature heat storage tank 40 is connected to the heat exchange medium cycle pipeline of the heat pump condenser of the heat pump unit 30, and the high-temperature heat storage tank 40 is connected to the air-conditioning user unit 60 through a heat-using pipeline 62. The heat pump condenser includes a series-connected first condenser 32 and second condenser 33, and the heat exchange medium cycle pipeline of the second condenser 33 is connected to a second cooling tower 34.
[0025] The heat energy grade improvement and refrigeration system has multiple working conditions, which will be described separately for winter and summer.
[0026] When it is winter, there are three working modes;
[0027] Mode 1: Close the air-conditioning chilled water circulation pipeline 11 of the heat pump unit 30 and the data center air conditioner 10, open the heat supply pipeline 62 of the air-conditioning user unit 60, and close the chilled water branch; connect the air-conditioning chilled water circulation pipeline 11 with the cooling circulation pipeline of the refrigeration unit 20, and connect the cooling circulation pipeline of the refrigeration condenser of the refrigeration unit 20 with the evaporator cooling circulation pipeline of the heat pump unit 30. At this time, after the refrigeration unit 20 cools the chilled water for the data center air conditioner 10, it is sent back to the data center air conditioner 10 to cool the computer room; the low-temperature water on the condenser side after the refrigeration unit 20 absorbs heat is sent into the evaporator 31 of the heat pump unit 30. The circulating medium of the heat pump unit 30 recovers the low-temperature heat energy of the data center air conditioner 10 equipment or the refrigeration unit 20 on the evaporator 31 side. The circulating medium is compressed into a high-temperature and high-pressure gas by the compressor and released to the condenser of the heat pump unit 30. The circulating medium releases heat on the condenser side to prepare high-temperature hot water, which is sent into the high-temperature heat storage tank 40 to store the high-temperature hot water.
[0028] Mode 2: Open the air-conditioning chilled water circulation pipeline 11 of the heat pump unit 30 and the data center air conditioner 10, close the air-conditioning chilled water circulation pipeline 11 of the refrigeration unit 20 and the data center air conditioner 10, and directly recover heat energy from the data center through the evaporator 31 of the heat pump unit as the low-temperature heat source for the heat pump unit 30 to produce high-temperature hot water, which can replace the operation of the original refrigeration unit 20 and the cooling tower.
[0029] Mode 3: By adjusting the opening degree of the valves connecting the air-conditioning chilled water circulation pipeline 11 with the heat pump unit 30 and the refrigeration unit 20 respectively, the refrigeration unit 20 and the heat pump unit 30 are simultaneously used to cool the data center, thereby reducing the operating load of the refrigeration unit 20.
[0030] In summer, close the air-conditioning chilled water circulation pipeline 11 of the heat pump unit 30 and the data center air conditioner 10, and the circulation pipeline between the heat pump and the refrigeration unit 20; open the chilled water branch of the air-conditioning user unit 60 and close the heat supply pipeline 62. The air-conditioning chilled water circulation pipeline 11 is connected with the cooling circulation pipeline of the refrigeration unit 20, and the cooling circulation pipeline of the evaporator 31 of the heat pump unit 30 is connected with the chilled water branch to supply cooling for the air-conditioning user unit 60. The working process is as follows: After the refrigeration unit 20 cools the chilled water for the data center air conditioner 10, it is sent back to the data center air conditioner 10 to cool the computer room. The cooling water after the refrigeration unit 20 absorbs heat is sent to the first cooling tower 21 for cooling and then sent back to the refrigeration unit 20; the air-conditioning chilled water of the air-conditioning user unit 60 is sent into the heat pump unit 30 through the chilled water branch for cooling and then sent back to the air-conditioning user unit 60 to provide a cooling source for the air conditioner. And this chilled water simultaneously serves as the low-temperature heat source for the hot water supply of the heat pump unit 30, with a comprehensive energy efficiency of up to 1:8, and high economic and environmental benefits.
[0031] The heat pump unit 30 is characterized by high exhaust pressure and high water outlet temperature. It can raise the cooling water temperature to above 65 - 70 °C, and the improvement of the hot water quality expands the heat utilization range. It can be used for central heating and hot water supply in cities. In summer, it can provide cooling for public buildings such as offices and hotels.
[0032] As Figure 3 shown, the thermal energy storage and supply system includes the high-temperature heat storage tank 40 and the heat pump unit 30 in the thermal energy quality improvement and refrigeration system, and also includes a low-temperature heat storage tank 50. The low-temperature outlet pipe 51 of the low-temperature heat storage tank 50 is connected to the inlet of the heat exchange medium circulation pipeline of the first condenser 32, and the high-temperature heat storage tank 40 is connected to the outlet of the heat exchange medium circulation pipeline of the first condenser 32. The outlet of the high-temperature heat storage tank 40 is connected to the heat inlet pipe of the air-conditioning user unit 60, and the heat outlet pipe of the air-conditioning user unit 60 is connected to the low-temperature heat storage tank 50. First valves 341 are provided on both the inlet pipe and the return pipe of the cooling tower. The condensate outlet pipe of the second condenser 33 is connected to one end of the low-temperature outlet pipe 51 close to the first condenser 32 through a water outlet switching pipe 332, and the low-temperature outlet pipe 51 is connected to the inlet pipe of the first condenser 32. The condensate inlet pipe of the second condenser 33 is connected to the low-temperature outlet pipe 51 of the low-temperature heat storage tank 50 through an inlet water switching pipe 331. Second valves 333 are provided on both the inlet water switching pipe 331 and the outlet water switching pipe 332. A third valve 511 is provided on the low-temperature outlet pipe between the inlet water switching pipe 331 and the outlet water switching pipe 332. A heat exchanger 53 is connected in series on the condensate outlet pipe of the heat exchange medium circulation pipeline of the second condenser 33 through a heat exchange pipeline 54. A fourth valve 541 is provided on the heat exchange pipeline 54. The inlet of the heat absorption pipeline on the other side of the heat exchanger 53 is connected to tap water, and the outlet of this heat absorption pipeline is connected to the low-temperature heat storage tank 50 through a make-up water pipe 52. The high-temperature heat storage tank is also connected to a hot water user unit through a pipeline. The high-temperature heat storage tank can provide heating for the air-conditioning users in winter and also provide hot water for the hot water users.
[0033] The hot water supply system provides hot water for hot water-using units such as hotels, office buildings, residences, and bathhouses in surrounding buildings, and operates in cooperation with the winter working conditions of the thermal energy quality improvement and refrigeration system. The specific working process is as follows: The heat exchange medium in the low-temperature heat storage tank 50 is transported to the condenser of the heat pump unit 30 for heat exchange, and the obtained high-temperature hot water is stored in the high-temperature heat storage tank 40 for central heating and hot water use by users. After the air-conditioning user unit 60 consumes heat, the low-temperature water returns to the low-temperature heat storage tank 50 and then enters the heat pump unit 30 for cyclic heating, repeating the heat generation and heat dissipation processes, so as to realize the winter heating of surrounding residences and commercial buildings. When it is necessary to replenish water to the low-temperature heat storage tank 50, the fourth valve 541 is opened, and tap water is preheated by exchanging heat with the circulating medium of the second condenser 33 through the heat exchanger 53, and the preheated tap water is sent into the low-temperature heat storage tank 50 for water replenishment.
[0034] When the central heating and hot water supply loads are large, the first valve 341 is closed and the second valve 333 is opened, so that the water inlet switching pipe 331 is connected to the low-temperature water outlet pipe 51, and the water outlet switching pipe 332 connects the second condenser 33 with the first condenser 32. Thus, the low-temperature hot water in the low-temperature heat storage tank 50 can be heated up once through heat exchange with the second condenser 33 and then heated up twice through the first condenser 32, realizing multi-stage rapid heating of the low-temperature water, increasing the outlet water temperature, and enabling the heat pump unit 30 to produce heat energy at full load. After the first valve 341 is closed, the flow rate of the low-temperature water entering the water inlet switching pipe 331 and directly fed into the heat exchange medium circulation pipeline of the first condenser 32 can be controlled by adjusting the third valve 511, that is, the water volume of the low-temperature water entering the first condenser 32 and the second condenser 33 is controlled and distributed.
[0035] The above are only the embodiments of the present invention, and common knowledge such as the specific structures and characteristics known in the solutions is not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.
Claims
1. A data center heat recovery and comprehensive utilization system, characterized by: It includes the data room air conditioner, refrigeration unit, heat pump unit and high-temperature heat storage tank. The air-conditioning refrigeration circulation pipeline of the data air-conditioning room is connected to the refrigeration unit and the heat pump unit respectively. The cooling circulation pipeline on the evaporator side of the heat pump unit is also connected to the cooling circulation pipeline of the refrigeration condenser of the refrigeration unit. The high-temperature heat storage tank is connected to the heat exchange medium circulation pipeline of the heat pump condenser of the heat pump unit.
2. The data center heat recovery and comprehensive utilization system according to claim 1 is characterized by: The heat pump condenser comprises a first condenser and a second condenser connected in series, and a circulation pipeline of the second condenser is connected to a cooling tower.
3. The data center heat recovery and comprehensive utilization system according to claim 2 is characterized by: It also includes a low-temperature heat storage tank, a low-temperature water outlet pipe of the low-temperature heat storage tank is connected to the inlet of the heat exchange medium circulation pipeline of the first condenser, a high-temperature heat storage tank is connected to the outlet of the heat exchange medium circulation pipeline of the first condenser, the outlet of the high-temperature heat storage tank is connected to the heat inlet pipe of the air-conditioning user unit, and the heat outlet pipe of the air-conditioning user unit is connected to the low-temperature heat storage tank.
4. The data center heat recovery and comprehensive utilization system according to claim 3 is characterized by: The first valve is provided on the water inlet pipe and the return pipe of the cooling tower. The condensation water outlet pipe of the second condenser is connected to the inlet of the heat exchange medium circulation pipeline of the first condenser through the water outlet switching pipe. The condensation water inlet pipe of the second condenser is connected to the low-temperature water outlet pipe of the low-temperature heat storage tank through the water inlet switching pipe. The water inlet switching pipe and the water outlet switching pipe are both provided with a second valve.
5. The data center heat recovery and comprehensive utilization system according to claim 4 is characterized by: A third valve is provided on the low-temperature water outlet pipe between the water inlet switching pipe and the water outlet switching pipe.
6. The data center heat recovery and comprehensive utilization system according to claim 5 is characterized by: A heat exchanger is connected in series to the condensing water outlet pipe of the heat exchange medium circulation pipeline of the second condenser. After passing through the heat exchanger, the condensing water outlet pipe is connected to the water inlet pipe of the cooling tower, and the return water pipe of the cooling tower is connected to the condensing water inlet pipe of the heat exchange medium circulation pipeline of the second condenser; the inlet of the heat absorption pipeline on the other side of the heat exchanger is connected to tap water, and the outlet of the heat absorption pipeline is connected to the low-temperature heat storage tank through a water supply pipe.
7. The data center heat recovery and comprehensive utilization system according to claim 1 is characterized by: The heat pump evaporator unit is connected to the air-conditioning user unit through a freezing branch.
8. The data center heat recovery and comprehensive utilization system according to claim 1 is characterized by: The high-temperature heat storage tank is also connected to a hot water user unit through a pipeline.