Data center temperature control equipment based on waste heat recovery
By designing a data center temperature control device based on waste heat recovery, the lithium bromide absorption refrigerator is used to recycle the heat energy in the heat exchange medium, generate low-temperature frozen water, and transport the cooled air to the server through the backplane air supply component, the problem of insufficient utilization of waste heat in the data center is solved and the effective utilization rate of energy is improved.
Patent Information
- Application Number
- CN202421449016.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-24
AI Technical Summary
When existing data centers use liquid cooling technology to cool the waste heat, the heat demand in summer and transition seasons is small, resulting in some of the heat energy being discharged into the air and not fully utilized.
A data center temperature control device based on waste heat recovery is designed, including cooling towers, cold plates, heat exchangers, backplane air supply components and waste heat recovery components. The lithium bromide absorption refrigerator is used to recover the heat energy in the heat exchange medium, generate 15°C low-temperature frozen water, and the cooled air is transported to the server through the backplane air supply assembly, so as to achieve cooling of equipment that has not been cooled by the cold plate.
The waste heat recovery component recycles heat energy to generate low-temperature frozen water, effectively cools down the air in the data center, improves the effective utilization rate of energy, and solves the problem of insufficient utilization of waste heat.
Smart Images
Figure CN222839972U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of waste heat recovery, and in particular relates to a data center temperature control device based on waste heat recovery. Background Art
[0002] With the rapid development of big data and cloud computing, data centers have an increasing demand for high computing power. To meet this demand, more and more data centers are choosing to use liquid cooling technology for cooling. However, this cooling method leads to an increase in waste heat temperature. At present, there are two main types of liquid-cooled servers: cold plate liquid cooling and immersion liquid cooling. Among them, the waste heat temperature of cold plate liquid cooling is about 45°C, while the waste heat quality of immersion liquid cooling is higher, reaching about 65°C. How to effectively utilize this waste heat has become an important issue.
[0003] At present, waste heat recovery in liquid-cooled cold plate data centers mainly uses auxiliary heat sources to improve the quality of waste heat, and uses it for waste heat power generation, heating or domestic hot water supply, etc. However, in terms of heating or domestic hot water supply, since the heat demand is relatively small in summer and transitional seasons, when the user demand around some data centers is relatively low, most of the heat energy is discharged into the air and is not fully utilized. Summary of the invention
[0004] The utility model aims to provide a data center temperature control device based on waste heat recovery.
[0005] The utility model provides a data center temperature control device based on waste heat recovery, which includes a cooling tower, a cold plate, a heat exchanger, a back plate air supply component and a waste heat recovery component; the heat exchanger is provided with a heat exchange medium pipeline and a cooling water pipeline for heat exchange; the cooling tower is connected to the cooling water pipeline of the heat exchanger to form a cooling water circulation loop. The cold plate is connected to the heat exchange medium pipeline of the heat exchanger to form a heat exchange medium circulation loop.
[0006] The backplane air supply assembly comprises an air supply chassis, a precooling disc, a cooling disc and a fan; a plurality of air supply ports are provided on one side of the air supply chassis; the fan is installed in the air supply port; the precooling disc and the cooling disc are arranged in the air supply chassis at intervals; the two ends of the precooling disc are respectively connected to the output end of the cooling tower and the input end of the cooling water pipeline; the cooling disc is located between the precooling disc and the air inlet side of the fan;
[0007] The waste heat recovery component adopts a lithium bromide absorption refrigerator. The generator in the waste heat recovery component is provided with a heat exchange medium channel; the heat exchange medium channel of the waste heat recovery component is arranged between the output end of the cold plate and the input end of the heat exchange medium pipeline of the heat exchanger. The evaporator in the waste heat recovery component is provided with a chilled water channel; the chilled water channel of the evaporator is connected to the cooling disk to form a waste heat utilization loop.
[0008] Preferably, it also includes a circulating infusion pump and a heat exchange medium delivery pump; the circulating infusion pump is connected in series between the input end of the cooling tower and the output end of the cooling water pipeline of the heat exchanger. The heat exchange medium delivery pump is connected in series between the output end of the cold plate and the input end of the heat exchange medium pipeline of the heat exchanger.
[0009] Preferably, the waste heat recovery component comprises an absorber, a generator, a condenser and an evaporator which are sequentially connected to form a lithium bromide solution-water vapor loop.
[0010] Preferably, the pre-cooling plate includes two first refrigeration coils arranged on the same plane; the cooling plate includes two second refrigeration coils arranged on the same plane.
[0011] Preferably, the first refrigeration coil and the second refrigeration coil each include n straight pipe sections and n-1 curved pipe sections; the n straight pipe sections are arranged in sequence with equal intervals; the ends of two adjacent straight pipe sections are connected by a curved pipe section.
[0012] Preferably, the straight pipe sections in the pre-cooling disk and the straight pipe sections in the cooling disk are arranged in a staggered manner.
[0013] Preferably, the flow direction of the liquid in the first refrigeration coil is opposite to the flow direction of the liquid in the second refrigeration coil.
[0014] Preferably, the liquid in the two first refrigeration coils in the pre-cooling plate flows in opposite directions; the liquid in the two second refrigeration coils in the cooling plate flows in opposite directions, and the output end of the upper first refrigeration coil or the second refrigeration coil is adjacent to the input end of the corresponding first refrigeration coil or the second refrigeration coil.
[0015] Preferably, a delivery branch pipe is connected between the output end of the cold plate and the output end of the generator of the waste heat recovery component; and an electric regulating valve is provided on the delivery branch pipe.
[0016] Preferably, the plurality of fans are arranged in a matrix on the side wall of the air supply chassis.
[0017] The beneficial effects of the utility model are:
[0018] The utility model recycles the heat energy in the heat exchange medium through the waste heat recovery component and produces low-temperature chilled water at 15°C. At the same time, the air in the data center is sent into the air supply chassis through the fan. The pre-cooling disk and the cooling disk in the air supply chassis combine the cooling water cooled by the cooling tower with the low-temperature chilled water. Pre-cooling is first performed, and then the low-temperature chilled water generated by the waste heat recovery component is re-cooled. The cooled air is delivered to the working server through the fan, so as to cool the equipment that is not cooled by the cold plate and improve the effective utilization rate of energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall flow path of the utility model.
[0020] Figure 2 It is a schematic diagram of the structure of the back plate air supply assembly in the utility model.
[0021] Figure 3 It is a schematic diagram of the relative positions of the precooling disc and the cooling disc in the utility model.
[0022] Figure 4 It is a schematic diagram of the liquid flow in the precooling disk in the utility model.
[0023] Figure 5 It is a schematic diagram of the flow direction of liquid in the cooling disk in the utility model.
[0024] Figure numerals: 1. Back plate air supply assembly; 1-1. Pre-cooling disk; 1-2. Cooling disk; 1-3. Fan; 2. Circulating infusion pump; 3. Heat exchange medium delivery pump; 4. Heat exchanger; 5. Cold plate; 6. Waste heat recovery assembly. DETAILED DESCRIPTION
[0025] The utility model is further described below in conjunction with the accompanying drawings.
[0026] like Figure 1 As shown, a data center temperature control device based on waste heat recovery is used to cool down the servers in the computer room. At the same time, the waste heat received by the heat exchange medium when cooling the CPU / GPU is used to output low-temperature chilled water at 15°C to further cool the server. The waste heat recovery system includes a cooling tower, a circulating infusion pump 2, a heat exchange medium delivery pump 3, a heat exchanger 4, a cold plate 5, a backplane air supply component 1 and a waste heat recovery component 6. The cold plate 5 is used to receive the heat exchange medium after heat exchange and cooling by the heat exchanger 4, and cool the CPU / GPU installed on the cold plate through the heat exchange medium.
[0027] The waste heat recovery component 6 is used to collect the heat exchanged by the heat exchange medium after cooling the CPU / GPU, and output the heat exchange medium at 45°C and chilled water at 15°C.
[0028] The backplane air supply assembly 1 includes a precooling disc 1-1, a cooling disc 1-2 and a fan 1-3. The precooling disc 1-1 and the cooling disc 1-2 are used to receive cooling water output from the cooling tower and chilled water output from the waste heat recovery assembly 6, respectively, and introduce external air through the fan 1-3. After cooling the air, it is output through the fan 1-3.
[0029] A heat exchange medium pipeline and a cooling water pipeline for heat exchange are arranged in the heat exchanger 4. The waste heat recovery system forms a cooling water circulation loop for circulating cooling water, a heat exchange medium circulation loop for circulating heat exchange medium, and a waste heat utilization loop for circulating chilled water.
[0030] The cooling water is used to receive the heat in the heat exchange medium and transfer the heat to the cooling tower for release. The heat exchange medium is used to receive the heat generated during the operation of the CPU / GPU and transfer the heat to the waste heat recovery component 6. The chilled water is used to receive the heat in the air passing through the cooling disks 1-2. The refrigerated air can receive the heat generated by the server when it is working, thereby achieving cooling.
[0031] The waste heat recovery system uses a lithium bromide absorption refrigerator. The lithium bromide absorption refrigerator includes an absorber, a generator, a condenser and an evaporator which are connected in sequence to form a lithium bromide solution-water vapor loop. The evaporator is provided with a chilled water channel for absorbing the cold generated by the evaporation of the lithium bromide solution.
[0032] During the operation of the lithium bromide absorption refrigerator, the lithium bromide in the absorber absorbs the water vapor in the circulation process of the lithium bromide absorption refrigerator, thereby outputting a lithium bromide solution. The generated lithium bromide solution is transported to the generator by a water pump. The lithium bromide solution in the generator is heated by the 50°C heat exchange medium flowing through it, so that the liquid water in the lithium bromide solution evaporates into water vapor. At the same time, the heat in the heat exchange medium is absorbed by the lithium bromide solution, and the temperature drops to 45°C. The water vapor output by the generator is condensed by the condenser to dissipate heat, convert the water vapor into liquid water, and output it to the evaporator. The liquid water evaporates into water vapor in the evaporator.
[0033] At the same time, during the evaporation process, the heat of the chilled water in the evaporator is absorbed, so that the chilled water is cooled to 15°C. The water vapor generated in the evaporator is transported to the absorber and enters the next cycle. At the same time, the generated 15°C chilled water is transported to the second refrigeration coil through the chilled water delivery pipeline in the evaporator to cool the air, and returns to the input end of the chilled water delivery pipeline after flowing through the second refrigeration coil.
[0034] The cooling tower, the precooling disc 1 - 1 in the back plate air supply assembly 1 , the cooling water pipeline in the heat exchanger 4 and the circulating infusion pump 2 are connected in sequence to form a cooling water circulation loop.
[0035] The heat exchange medium pipeline in the heat exchanger 4, the cold plate 5, the absorber in the waste heat recovery component 6 and the heat exchange medium delivery pump 3 are connected in sequence to form a heat exchange medium circulation loop.
[0036] The chilled water channel of the evaporator in the waste heat recovery component 6 is connected to the input end of the cooling disk 1-2, and the output end of the cooling disk 1-2 is connected to the chilled water input pipeline in the evaporator to form a waste heat utilization loop.
[0037] like Figure 2 and 3 As shown, the backplane air supply assembly 1 also includes an air supply chassis. The precooling disk 1-1 and the cooling disk 1-2 are arranged in the air supply chassis at intervals. The precooling disk 1-1 and the cooling disk 1-2 are used to gradually cool down the air flowing through the air supply chassis. A plurality of air supply ports are provided on one side of the air supply chassis close to the cooling disk 1-2. The fan 1-3 is installed in the air supply port to drive the air to flow through the air supply chassis and output it. The precooling disk 1-1 includes two first cooling coils arranged in sequence along the vertical direction. The cooling disk 1-2 includes two second cooling coils arranged in sequence along the vertical direction. The first cooling coil and the second cooling coil are both serpentine. As shown Figure 3 , 4 As shown in Figure 5, the flow direction of the liquid in the first refrigeration coil is opposite to the flow direction of the liquid in the second refrigeration coil. When the heat exchange medium in the first refrigeration coil rises in temperature due to movement to the end, the air passing through will be cooled by the chilled water initially introduced into the second refrigeration coil, ensuring the refrigeration effect. Figure 4 and 5 As shown, the liquid flows in the two first refrigeration coils in the pre-cooling plate 1-1 and the two second refrigeration coils in the cooling plate 1-2 in opposite directions, and the output end of the first refrigeration coil or the second refrigeration coil located above is adjacent to the input end of the corresponding first refrigeration coil or the second refrigeration coil, thereby reducing the influence of insufficient cooling effect caused by the temperature increase of the heat exchange medium due to movement to the end.
[0038] The first refrigeration coil and the second refrigeration coil each include n straight pipe sections and n-1 curved pipe sections. The n straight pipe sections are arranged in sequence at equal intervals. The ends of two adjacent straight pipe sections are connected by curved pipe sections. The straight pipe section in the first refrigeration coil is staggered with the straight pipe section in the second refrigeration coil in the vertical direction. After the air flows through the straight pipe section in the first refrigeration coil, the two diverted air flows can contact the straight pipe section in the second refrigeration coil adjacent to the straight pipe section, thereby improving the refrigeration efficiency.
[0039] During operation, the first refrigeration coil and the second refrigeration coil are respectively fed with cooling water at 34°C outputted from the cooling tower and chilled water at 15°C outputted from the waste heat recovery component 6, so that the air sent into the air supply box can be gradually cooled down. The cooled air is outputted to the working server through fans 1-3 to achieve the purpose of cooling down.
[0040] In this waste heat recovery system, a delivery branch pipe is connected in parallel between the pipe connecting the generator and the heat exchanger and the pipe connecting the cold plate and the absorber. The delivery branch pipe is controlled by an electric regulating valve. When the waste heat recovery component fails, the electric regulating valve controls the flow of the delivery branch pipe so that the heat exchange medium can return to the heat exchanger through the delivery branch pipe to ensure cooling of the CPU / GPU.
[0041] The working principle of the utility model is as follows:
[0042] Fans 1-3 in the backplane air supply assembly 1 work to introduce air into the air supply chassis. At the same time, the cooling tower delivers 34°C cooling water to the first refrigeration coil in the backplane air supply assembly 1 to preliminarily cool the introduced air. The cooling water flows through the first refrigeration coil and the temperature rises to 37°C. The cooling water then passes into the cooling water pipe in the heat exchanger 4, receives the heat from the heat exchange medium in the heat exchange medium pipe in the heat exchanger 4, and transfers the heat to the cooling tower for release. After the heat exchange medium is cooled to 42°C by cooling water heat exchange, it is passed into the cold plate 5 to receive the heat generated during the operation of the CPU / GPU installed on the cold plate 5. The temperature of the heat exchange medium flowing through the cold plate 5 rises to 50°C. The heat exchange medium is passed into the heating pipe in the generator in the waste heat recovery system.
[0043] The lithium bromide solution in the generator is heated by the 50°C heat exchange medium flowing through it, so that the liquid water in the lithium bromide solution evaporates into water vapor. At the same time, the heat in the heat exchange medium is absorbed by the lithium bromide solution, and the temperature drops to 45°C. The cooled heat exchange medium is passed into the heat exchange medium pipeline in the heat exchanger 4 for further cooling. At the same time, the water vapor output by the generator is condensed by the condenser to convert the water vapor into liquid water and output it to the evaporator. The liquid water evaporates into water vapor in the evaporator. At the same time, during the evaporation process, the heat of the chilled water in the evaporator is absorbed, so that the chilled water is cooled to 15°C. The water vapor generated in the evaporator is transported to the absorber and enters the next cycle. At the same time, the generated 15°C chilled water is transported to the second refrigeration coil to further cool the air. Fan 1-3 transports the cooled air to the working server to achieve the purpose of cooling. At the same time, the chilled water returns to the input end of the chilled water delivery pipeline after flowing through the second refrigeration coil to achieve the purpose of circulation.
Claims
1. A data center temperature control device based on waste heat recovery, comprising a cooling tower, a cold plate (5) and a heat exchanger (4); the heat exchanger (4) is provided with a heat exchange medium pipeline and a cooling water pipeline for heat exchange; the cooling tower is connected to the cooling water pipeline of the heat exchanger (4) to form a cooling water circulation loop; the cold plate (5) is connected to the heat exchange medium pipeline of the heat exchanger (4) to form a heat exchange medium circulation loop; the characteristics are: It also includes a back plate air supply component (1) and a waste heat recovery component (6); The backplane air supply assembly (1) comprises an air supply chassis, a precooling disc (1-1), a cooling disc (1-2) and a fan (1-3); a plurality of air supply ports are provided on one side of the air supply chassis; the fan (1-3) is installed in the air supply port; the precooling disc (1-1) and the cooling disc (1-2) are arranged in the air supply chassis at intervals; the two ends of the precooling disc (1-1) are respectively connected to the output end of the cooling tower and the input end of the cooling water pipeline; the cooling disc (1-2) is located between the precooling disc (1-1) and the air inlet side of the fan (1-3); The waste heat recovery component (6) adopts a lithium bromide absorption refrigerator; the generator in the waste heat recovery component (6) is provided with a heat exchange medium channel; the heat exchange medium channel of the waste heat recovery component (6) is arranged between the output end of the cold plate (5) and the input end of the heat exchange medium pipeline of the heat exchanger (4); the evaporator in the waste heat recovery component (6) is provided with a chilled water channel; the chilled water channel of the evaporator is connected to the cooling disk (1-2) to form a waste heat utilization circuit.
2. According to claim 1, a data center temperature control device based on waste heat recovery is characterized in that: It also includes a circulating infusion pump (2) and a heat exchange medium delivery pump (3); the circulating infusion pump (2) is connected in series between the input end of the cooling tower and the output end of the cooling water pipeline of the heat exchanger (4); the heat exchange medium delivery pump (3) is connected in series between the output end of the cold plate (5) and the input end of the heat exchange medium pipeline of the heat exchanger (4).
3. The data center temperature control device based on waste heat recovery according to claim 1 is characterized in that: The waste heat recovery component (6) comprises an absorber, a generator, a condenser and an evaporator which are sequentially connected to form a lithium bromide solution-water vapor loop.
4. The data center temperature control device based on waste heat recovery according to claim 1 is characterized in that: The pre-cooling plate (1-1) comprises two first refrigeration coils arranged on the same plane; and the cooling plate (1-2) comprises two second refrigeration coils arranged on the same plane.
5. The data center temperature control device based on waste heat recovery according to claim 4 is characterized in that: The first refrigeration coil and the second refrigeration coil each include n straight pipe sections and n-1 curved pipe sections; the n straight pipe sections are arranged in sequence with equal intervals; the ends of two adjacent straight pipe sections are connected by a curved pipe section.
6. The data center temperature control device based on waste heat recovery according to claim 5 is characterized in that: The straight pipe sections in the pre-cooling disc (1-1) and the straight pipe sections in the cooling disc (1-2) are arranged in a staggered manner.
7. The data center temperature control device based on waste heat recovery according to claim 4 is characterized in that: The flow direction of the liquid in the first refrigeration coil is opposite to the flow direction of the liquid in the second refrigeration coil.
8. The data center temperature control device based on waste heat recovery according to claim 4 is characterized in that: The liquid in the two first refrigeration coils in the precooling plate (1-1) flows in opposite directions; the liquid in the two second refrigeration coils in the cooling plate (1-2) flows in opposite directions, and the output end of the first refrigeration coil or the second refrigeration coil located above is adjacent to the input end of the corresponding first refrigeration coil or the second refrigeration coil.
9. The data center temperature control device based on waste heat recovery according to claim 2 is characterized in that: A delivery branch pipe is connected between the output end of the cold plate (5) and the output end of the generator of the waste heat recovery component (6); and an electric regulating valve is arranged on the delivery branch pipe.
10. The data center temperature control device based on waste heat recovery according to claim 1, characterized in that: The plurality of fans (1-3) are arranged in a matrix on the side wall of the air supply chassis.