A data center waste heat recovery system

Abstract

The utility model relates to data center heat management technical field especially relates to a data center waste heat recovery system, including liquid gold drive pump, liquid gold cold plate, liquid metal water heat exchanger, adsorption refrigeration equipment, cooling tower, cooling tower water pump and heat load water pump, liquid gold cold plate is located in the cabinet inside, and liquid gold cold plate is connected with heat source setting, liquid gold drive pump drives normal temperature liquid metal to liquid gold cold plate, and the heat is absorbed on liquid gold cold plate and becomes high temperature liquid metal, and liquid gold drive pump drives high temperature liquid metal to liquid metal water heat exchanger, cooling tower produces cooling water, and cooling tower water pump drives cooling water to liquid metal water heat exchanger, realizes heat exchange, the data center waste heat recovery system provided by the utility model utilizes the high thermal conductivity of liquid metal to carry out fast heat extraction to data center computing unit, and then recycles and utilizes waste heat by using adsorption refrigeration technology, provides refrigeration capacity for data center, and reduces the PUE index of data center.

Description

Technical Field

[0001] This utility model belongs to the field of data center thermal management technology, and in particular relates to a data center waste heat recovery system. Background Technology

[0002] Data centers typically generate a large amount of low-temperature waste heat during operation, which is currently often directly discharged into the atmosphere, causing thermal pollution and energy waste. To improve energy efficiency and reduce thermal pollution, there is an urgent need for a technology that can recover waste heat. Utility Model Content

[0003] In view of this, the present invention aims to provide a data center waste heat recovery system that effectively realizes the recovery of waste heat from data centers and avoids thermal pollution and energy waste.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] This utility model provides a data center waste heat recovery system, which includes a liquid metal drive pump 1, a liquid metal cold plate 2, a liquid metal water heat exchanger 4, an adsorption refrigeration device 5, a cooling tower 7, a cooling tower water pump 8, and a heat load water pump 9.

[0006] The liquid metal cold plate 2 is located inside the server rack of the data center, and the liquid metal cold plate 2 is connected to the heat source 3 of the data center.

[0007] The liquid metal cold plate 2 absorbs the heat generated by the heat source 3, and the liquid metal drive pump 1 drives the room temperature liquid metal to the liquid metal cold plate 2, where it absorbs heat to form high temperature liquid metal. The liquid metal drive pump 1 then drives the high temperature liquid metal to the liquid metal water heat exchanger 4.

[0008] The cooling tower 7 generates cooling water, and the cooling tower water pump 8 drives the cooling water to the liquid metal-water heat exchanger 4; the high-temperature liquid metal exchanges heat with the cooling water to form room-temperature liquid metal and heated water; the adsorption refrigeration device 5 exchanges heat with the heated water; the cooling tower water pump 8 drives the cooling water to the adsorption refrigeration device 5 to remove heat from the adsorption refrigeration device 5; the heat load water pump 9 drives the cooling water to the user heat load 6 to remove heat from the user heat load 6; the adsorption refrigeration device 5 provides cooling capacity for the liquid metal-water heat exchanger 4 and the user heat load 6.

[0009] Furthermore, the room-temperature liquid metal is a gallium indium tin alloy.

[0010] Furthermore, the liquid metal drive pump 1, the liquid metal cold plate 2, and the liquid metal water heat exchanger 4 are made of metallic and non-metallic materials that do not react with the liquid metal.

[0011] Furthermore, the liquid metal cold plate 2 is a liquid metal compact cold plate, and the liquid metal compact cold plate has a microchannel flow design.

[0012] Furthermore, the liquid metal water heat exchanger 4 includes an enhanced heat exchange structure, which is a finned or microchannel structure.

[0013] Furthermore, the liquid metal water heat exchanger 4 has a heat exchange fin structure.

[0014] Furthermore, the adsorption refrigeration device 5 includes an enhanced adsorption structure, which is a heat pipe structure.

[0015] Furthermore, the adsorption refrigeration device 5 includes a first adsorption bed and a second adsorption bed; the first adsorption bed and the second adsorption bed adsorb alternately.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0017] This invention provides a novel waste heat recovery system for data centers, which effectively recovers waste heat from data centers, avoiding thermal pollution and energy waste. Specifically, it utilizes the high thermal conductivity of liquid metal to rapidly extract heat from the computing units of the data center, and then uses adsorption refrigeration technology to recover and reuse the waste heat, providing cooling capacity for the data center and reducing the PUE (Power Usage Effectiveness) index of the data center, that is, reducing the index value for evaluating the energy efficiency of the data center. Attached Figure Description

[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0019] Figure 1 This is a schematic diagram of the data center waste heat recovery system described in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Liquid metal drive pump; 2. Liquid metal cold plate; 3. Heat source; 4. Liquid metal water heat exchanger; 5. Adsorption refrigeration equipment; 6. User heat load; 7. Cooling tower; 8. Cooling tower water pump; 9. Heat load water pump. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and do not constitute a limitation thereof.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figure 1The diagram shows a schematic of the data center waste heat recovery system according to an embodiment of this utility model. As can be seen from the diagram, the data center waste heat recovery system includes a liquid metal drive pump 1, a liquid metal cold plate 2, a liquid metal water heat exchanger 4, an adsorption refrigeration device 5, a cooling tower 7, a cooling tower water pump 8, and a heat load water pump 9. The liquid metal cold plate 2 is located inside the data center's server rack and is connected to a heat source 3. The liquid metal drive pump 1, liquid metal cold plate 2, and liquid metal water heat exchanger 4 are all filled with liquid metal. Specifically, the liquid metal cold plate 2 absorbs the heat generated by the heat source 3, the liquid metal drive pump 1 drives room-temperature liquid metal to the liquid metal cold plate 2, where it absorbs heat to form high-temperature liquid metal, and the liquid metal drive pump 1 drives the high-temperature liquid metal to the liquid metal water heat exchanger 4. The cooling tower 7 generates cooling water, and the cooling tower water pump 8 drives the cooling water to the liquid metal-water heat exchanger 4. On one hand, the high-temperature liquid metal exchanges heat with the cooling water to form room-temperature liquid metal and heated water. On the other hand, the adsorption refrigeration device 5 exchanges heat with the heated water. Simultaneously, the cooling tower water pump 8 drives the cooling water to the adsorption refrigeration device 5, removing heat from the adsorption refrigeration device 5. The heat load water pump 9 drives the cooling water to the user heat load 6, removing heat from the user heat load 6. The adsorption refrigeration device 5 provides cooling capacity for the liquid metal-water heat exchanger 4 and the user heat load 6. Specifically, after the adsorption bed in the adsorption refrigeration device 5 adsorbs heat, the adsorbent in the adsorption bed generates a cooling effect through evaporation. This achieves waste heat recovery for the entire data center.

[0028] In a specific embodiment, the room-temperature liquid metal is a gallium indium tin alloy, and various proportions of gallium indium tin alloys are acceptable. By using liquid metal as a heat transfer medium, its high thermal conductivity is utilized to quickly transfer the heat of the data center to the liquid metal water heat exchanger. The water in the liquid metal water heat exchanger is cooled by an adsorption refrigeration device, while providing cooling capacity for the user load. Moreover, the boiling point of liquid metal is as high as 1300℃, it has a wide range of applications, it is difficult to boil in the pipeline, and it has a high safety factor.

[0029] In a preferred embodiment, the liquid metal drive pump 1, the liquid metal cold plate 2, and the liquid metal water heat exchanger 4 are made of metal and non-metal materials that do not react with the liquid metal; the liquid metal cold plate 2 is a compact liquid metal cold plate, specifically, the compact liquid metal cold plate has a microchannel flow channel design, making the structure of the liquid metal cold plate 2 more compact; the liquid metal water heat exchanger 4 includes an enhanced heat exchange structure, which is a fin or a microchannel; the liquid metal water heat exchanger 4 can also be a high-efficiency liquid metal water heat exchanger, specifically a heat exchange fin structure, to achieve high-efficiency heat exchange.

[0030] In a specific embodiment, the adsorption refrigeration device 5 includes an enhanced adsorption structure, which is a heat pipe structure; specifically, the adsorption refrigeration device 5 includes a first adsorption bed and a second adsorption bed; the first and second adsorption beds adsorb alternately, and the alternating operation of the two adsorption beds is necessary to better and continuously generate a cooling effect, providing cooling capacity for the liquid metal water heat exchanger 4 and the user heat load 6. Specifically, the process of alternating adsorption by the first and second adsorption beds includes:

[0031] (1) Desorption in the first adsorption bed and adsorption in the second adsorption bed: The first adsorption bed is heated by hot water, and the gaseous refrigerant is desorbed from the first adsorption bed and enters the condenser to be condensed. The liquid refrigerant flows into the evaporator. Cooling water flows into the condenser, takes away the heat of condensation, and flows into the second adsorption bed at the same time. After the second adsorption bed is cooled, it will adsorb the gaseous refrigerant, which will cause the pressure inside the cavity to drop sharply. Therefore, the liquid refrigerant in the evaporator will evaporate to produce a cooling effect. The cooling capacity is delivered to the user end by the cold water entering the evaporator.

[0032] (2) Heat recovery from the first adsorption bed to the second adsorption bed: Cooling water enters the first adsorption bed. Since the first adsorption bed was heated in the previous process, the temperature of the first adsorption bed is very high. Therefore, the temperature of the cooling water flowing out of the first adsorption bed is relatively high. This part of the hot cooling water directly enters the hot water tank. The hot water flows through the second adsorption bed. Since the temperature of the second adsorption bed was relatively low before, the hot water is cooled. This part of the water with a lower temperature directly enters the cooling tower. If the heat recovery time is selected properly, the temperature of the hot water outlet can be close to that of the cooling water outlet, thus indirectly realizing the heat recovery from the first adsorption bed to the second adsorption bed.

[0033] (3) Desorption from the second adsorption bed and adsorption from the first adsorption bed: The second adsorption bed is heated by hot water, and the gaseous refrigerant is desorbed from the left adsorption bed and enters the condenser to be condensed. The liquid refrigerant flows into the evaporator. Cooling water flows into the condenser, carrying away the heat of condensation, and at the same time flows into the first adsorption bed. After the first adsorption bed is cooled, it will adsorb the gaseous refrigerant, causing the pressure inside the cavity to drop sharply. Therefore, the liquid refrigerant in the evaporator will evaporate to produce a cooling effect. The cooling capacity is delivered to the user end by the cold water entering the evaporator.

[0034] (3) The second adsorption bed reheats the first adsorption bed: Cooling water enters the second adsorption bed. Since the second adsorption bed was heated in the previous process, the temperature of the second adsorption bed is very high. Therefore, the temperature of the cooling water flowing out of the second adsorption bed is relatively high. This part of the hot cooling water directly enters the hot water tank. The hot water flows through the first adsorption bed. Since the temperature of the first adsorption bed was relatively low before, the hot water is cooled. This part of the water with a lower temperature directly enters the cooling tower. If the reheating time is selected properly, the hot water outlet temperature can be close to the cooling water outlet temperature, which indirectly realizes the reheating of the second adsorption bed to the first adsorption bed.

[0035] This utility model provides a novel waste heat recovery system for data centers, which effectively recovers waste heat from data centers, avoiding thermal pollution and energy waste. Specifically, it utilizes the high thermal conductivity of liquid metal to rapidly extract heat from the data center computing units, and then uses adsorption refrigeration technology to recover and reuse the waste heat, providing cooling capacity for the data center and reducing the data center's PUE index.

[0036] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this utility model can be achieved, and this is not limited herein.

[0037] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A data center waste heat recovery system, characterized by: The data center waste heat recovery system includes a liquid metal drive pump (1), a liquid metal cold plate (2), a liquid metal water heat exchanger (4), an adsorption refrigeration device (5), a cooling tower (7), a cooling tower water pump (8), and a heat load water pump (9). The liquid metal cold plate (2) is located inside the server rack of the data center, and the liquid metal cold plate (2) is connected to the heat source (3) of the data center. The liquid metal cold plate (2) absorbs the heat generated by the heat source (3), and the liquid metal drive pump (1) drives the room temperature liquid metal to the liquid metal cold plate (2), absorbs heat on the liquid metal cold plate (2) to form high temperature liquid metal, and the liquid metal drive pump (1) then drives the high temperature liquid metal to the liquid metal water heat exchanger (4). The cooling tower (7) generates cooling water, and the cooling tower water pump (8) drives the cooling water to the liquid metal water heat exchanger (4); the high-temperature liquid metal exchanges heat with the cooling water to form room-temperature liquid metal and heated water; the adsorption refrigeration device (5) exchanges heat with the heated water; The cooling tower water pump (8) drives the cooling water to the adsorption refrigeration device (5) to remove the heat in the adsorption refrigeration device (5); the heat load water pump (9) drives the cooling water to the user heat load (6) to remove the heat in the user heat load (6); the adsorption refrigeration device (5) provides cooling capacity for the liquid metal water heat exchanger (4) and the user heat load (6).

2. The data center waste heat recovery system of claim 1, wherein: The liquid gold cold plate (2) is a liquid gold compact cold plate, and the liquid gold compact cold plate is designed with microchannel flow channels.

3. The data center waste heat recovery system of claim 1, wherein: The liquid metal water heat exchanger (4) includes an enhanced heat exchange structure, which is a fin or a microchannel.

4. The data center waste heat recovery system according to claim 1, characterized in that: The liquid metal water heat exchanger (4) has a heat exchange fin structure.

5. The data center waste heat recovery system of claim 1, wherein: The adsorption refrigeration device (5) includes an enhanced adsorption structure, which is a heat pipe structure.

6. The data center waste heat recovery system of claim 1, wherein: The adsorption refrigeration device (5) includes a first adsorption bed and a second adsorption bed; the first adsorption bed and the second adsorption bed adsorb alternately.

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