Data center waste heat recovery system

Abstract

The invention relates to the technical field of data center heat management, in particular to a data center waste heat recovery system which comprises a liquid gold driving pump, a liquid gold cold plate, a liquid metal water heat exchanger, adsorption refrigeration equipment, a cooling tower, a cooling tower water pump and a heat load water pump. The liquid metal cold plate is located in the cabinet and is connected with the heat source; the liquid gold driving pump drives normal-temperature liquid metal to the liquid gold cold plate, the normal-temperature liquid metal absorbs heat on the liquid gold cold plate to become high-temperature liquid metal, and the liquid gold driving pump drives the high-temperature liquid metal to the liquid metal water heat exchanger; the cooling tower generates cooling water, and the cooling tower water pump drives the cooling water to the liquid metal water heat exchanger; heat exchange is realized; according to the data center waste heat recovery system provided by the invention, the high heat conductivity of the liquid metal is utilized to quickly take heat from the data center calculation unit, and then the adsorption refrigeration technology is utilized to recycle the waste heat, so that the refrigerating capacity is provided for the data center, and the PUE index of the data center is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of data center heat management, and particularly relates to a data center waste heat recovery system. BACKGROUND

[0002] Generally, a large amount of low-temperature waste heat is generated during the operation of a data center, and the waste heat is directly discharged into the atmosphere, causing heat pollution and energy waste. In order to improve energy utilization and reduce heat pollution, a technical solution for waste heat recovery is urgently needed. SUMMARY

[0003] Therefore, the application aims to provide a data center waste heat recovery system, which can effectively recover waste heat in a data center and avoid heat pollution and energy waste.

[0004] To achieve the above-mentioned purpose, the technical solution of the application is as follows: The application provides a data center waste heat recovery system, which comprises a liquid metal driving 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 a cabinet of the data center, and the liquid metal cold plate 2 is connected with a heat source 3 of the data center. The liquid metal cold plate 2 absorbs heat generated by the heat source 3, the liquid metal driving pump 1 drives normal-temperature liquid metal to the liquid metal cold plate 2 to absorb heat thereon, forming high-temperature liquid metal, and the liquid metal driving pump 1 drives the high-temperature liquid metal to the liquid metal water heat exchanger 4. The cooling tower 7 generates cooling water, 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 normal-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 in the adsorption refrigeration device 5, the heat load water pump 9 drives the cooling water to the user heat load 6 to remove heat in the user heat load 6, and the adsorption refrigeration device 5 provides refrigeration capacity for the liquid metal water heat exchanger 4 and the user heat load 6.

[0005] Further, the normal-temperature liquid metal is a gallium-indium-tin alloy.

[0006] Further, the structure materials of the liquid metal driving pump 1, the liquid metal cold plate 2, and the liquid metal water heat exchanger 4 are metal and non-metal materials that do not react with the liquid metal.

[0007] Further, the liquid metal cold plate 2 is a liquid metal compact cold plate, which is a micro-channel flow channel design.

[0008] Further, the liquid metal water heat exchanger 4 comprises a heat transfer enhancement structure, which is a fin or a micro-channel.

[0009] Further, the liquid metal water heat exchanger 4 is a heat transfer fin structure.

[0010] Further, the adsorption refrigeration device 5 comprises a heat transfer enhancement structure, which is a heat pipe structure.

[0011] Further, the adsorption refrigeration device 5 comprises a first adsorption bed and a second adsorption bed; the first adsorption bed and the second adsorption bed alternately adsorb.

[0012] Compared with the prior art, the application can achieve the following beneficial effects: The application provides a data center waste heat recovery system with a novel structure, which effectively recovers waste heat of a data center, avoids causing heat pollution and energy waste, specifically uses high thermal conductivity of liquid metal to quickly take heat from a computing unit of the data center, and then uses adsorption refrigeration technology to recover and utilize the waste heat, so as to provide refrigeration capacity for the data center and reduce a PUE (Power Usage Effectiveness) index of the data center, that is, reduce an index value for evaluating energy efficiency of the data center. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings constituting a part of the application are used to provide further understanding of the application, the schematic embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application. In the drawings: Figure 1 A structure schematic view of the data center waste heat recovery system according to the embodiments of the application.

[0014] Explanation of reference signs: 1, liquid metal driven pump; 2, liquid metal cold plate; 3, heat source; 4, liquid metal water heat exchanger; 5, adsorption refrigeration device; 6, user heat load; 7, cooling tower; 8, cooling tower water pump; 9, heat load water pump. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the application clearer, the application is further described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and do not constitute limitation on the application.

[0016] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0017] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0018] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0019] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0020] As Figure 1As shown in the structural schematic diagram of the data center waste heat recovery system according to the embodiment of the present application, the data center waste heat recovery system comprises a liquid metal driven 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 a cabinet of the data center, and is connected with a heat source 3. The liquid metal driven pump 1, the liquid metal cold plate 2, and the liquid metal water heat exchanger 4 are all filled with liquid metal. Specifically, the liquid metal cold plate 2 absorbs heat generated by the heat source 3. The liquid metal driven pump 1 drives liquid metal at normal temperature to the liquid metal cold plate 2 to absorb heat thereon, forming high-temperature liquid metal. The liquid metal driven 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, forming liquid metal at normal temperature and heated water. On the other hand, the adsorption refrigeration device 5 exchanges heat with the heated water. Meanwhile, the cooling tower water pump 8 drives the cooling water to the adsorption refrigeration device 5 to take away heat in the adsorption refrigeration device 5. The heat load water pump 9 drives the cooling water to the user heat load 6 to take away heat in the user heat load 6. The adsorption refrigeration device 5 provides refrigeration capacity for the liquid metal water heat exchanger 4 and the user heat load 6. Specifically, after absorbing heat, the adsorbent in the adsorption bed of the adsorption refrigeration device 5 generates refrigeration effect through evaporation. Thus, waste heat recovery of the entire data center is realized.

[0021] In specific embodiments, the liquid metal at normal temperature is gallium-indium-tin alloy, and generally different proportions of gallium-indium-tin alloy can be used. By using liquid metal as heat transfer medium, the data center heat is quickly conducted to the liquid metal water heat exchanger through the liquid metal, and the water in the liquid metal water heat exchanger is cooled by the adsorption refrigeration device, while providing refrigeration capacity for the user load. Moreover, the boiling point of liquid metal is as high as 1300℃, and it has a wide range of use and is difficult to boil in a pipeline, so it has a high safety factor.

[0022] In preferred embodiments, the structural material of the liquid metal driven pump 1, the liquid metal cold plate 2, and the liquid metal water heat exchanger 4 is a metal and non-metal material that does not react with the liquid metal. The liquid metal cold plate 2 is a liquid metal compact cold plate. Specifically, the liquid metal compact cold plate is designed with micro-channel flow channels, so that the structure of the liquid metal cold plate 2 is more compact. The liquid metal water heat exchanger 4 comprises a heat transfer enhancement structure, which is a fin or a micro-channel. The liquid metal water heat exchanger 4 can also be a liquid metal water high-efficiency heat exchanger, which is specifically a heat transfer fin structure, achieving high-efficiency heat exchange.

[0023] In a specific embodiment, the adsorption refrigeration device 5 comprises a reinforced adsorption structure, which is a heat pipe structure; specifically, the adsorption refrigeration device 5 comprises a first adsorption bed and a second adsorption bed; the first adsorption bed and the second adsorption bed adsorb alternately, and the two adsorption beds work alternately to better continuously produce a refrigeration effect to provide the liquid metal water heat exchanger 4 and the user thermal load 6 with a refrigeration capacity. Specifically, the process of the first adsorption bed and the second adsorption bed adsorbing alternately comprises: (1) The first adsorption bed desorbs the second adsorption bed: hot water heats the first adsorption bed, gaseous refrigerant is desorbed from the first adsorption bed, enters the condenser to be condensed, liquid refrigerant flows into the evaporator; cooling water flows into the condenser to take away the condensation heat, and flows into the second adsorption bed at the same time; after the second adsorption bed is cooled, it adsorbs gaseous refrigerant, so that the pressure in the cavity drops sharply, and therefore the liquid refrigerant in the evaporator evaporates to produce a refrigeration effect, and the cold quantity is transported to the user end by the cooling water entering the evaporator.

[0024] (2) The first adsorption bed heat-recovering to the second adsorption bed: cooling water enters the first adsorption bed, and since the first adsorption bed is in a heating state in the previous process, the temperature of the first adsorption bed is very high, so the temperature of the cooling water flowing out of the first adsorption bed is relatively high, and this part of hot cooling water directly enters the hot water tank; hot water flows through the second adsorption bed, and since the temperature of the second adsorption bed is relatively low, the hot water is cooled, and this part of water with a relatively low temperature directly enters the cooling tower; if the heat-recovering time is properly selected, the outlet water temperature of the hot water and the outlet water temperature of the cooling water can be close, thereby indirectly realizing the heat-recovering of the first adsorption bed to the second adsorption bed.

[0025] (3) The second adsorption bed desorbs the first adsorption bed: hot water heats the second adsorption bed, gaseous refrigerant is desorbed from the left adsorption bed, enters the condenser to be condensed, liquid refrigerant flows into the evaporator; cooling water flows into the condenser to take away the condensation heat, and flows into the first adsorption bed at the same time. After the first adsorption bed is cooled, it adsorbs gaseous refrigerant, so that the pressure in the cavity drops sharply, and therefore the liquid refrigerant in the evaporator evaporates to produce a refrigeration effect, and the cold quantity is transported to the user end by the cooling water entering the evaporator.

[0026] (3) The second adsorption bed heat-recovering to the first adsorption bed: cooling water enters the second adsorption bed, and since the second adsorption bed is in a heating state in the previous process, the temperature of the second adsorption bed is very high, so the temperature of the cooling water flowing out of the second adsorption bed is relatively high, and this part of hot cooling water directly enters the hot water tank; hot water flows through the first adsorption bed, and since the temperature of the first adsorption bed is relatively low, the hot water is cooled, and this part of water with a relatively low temperature directly enters the cooling tower; if the heat-recovering time is properly selected, the outlet water temperature of the hot water and the outlet water temperature of the cooling water can be close, thereby indirectly realizing the heat-recovering of the second adsorption bed to the first adsorption bed.

[0027] The embodiment of the application provides a novel structure of a data center waste heat recovery system, effectively realizes waste heat recovery of the data center, avoids heat pollution and energy waste, specifically utilizes high thermal conductivity of liquid metal to quickly take heat from a computing unit of the data center, and then utilizes adsorption refrigeration technology to recycle and utilize the waste heat, so as to provide refrigeration capacity for the data center and reduce a PUE index of the data center.

[0028] It should be understood that the steps shown above can be reordered, added, or deleted using various forms of flow. For example, the steps described in the present disclosure can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions of the present disclosure can be achieved, and the present disclosure is not limited herein.

[0029] The above specific embodiments do not constitute a limitation on the protection scope of the present application. 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 modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A data center waste heat recovery system, characterized by: The data center waste heat recovery system comprises a liquid metal driven 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 a cabinet of the data center, and the liquid metal cold plate (2) is connected with a heat source (3) of the data center. The liquid metal cold plate (2) absorbs heat generated by the heat source (3), the liquid metal driven pump (1) drives normal-temperature liquid metal to the liquid metal cold plate (2) to absorb heat thereon to form high-temperature liquid metal, and the liquid metal driven pump (1) drives the high-temperature liquid metal to the liquid metal water heat exchanger (4). The cooling tower (7) generates cooling water, 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 normal-temperature liquid metal and heated water, and 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 take away heat in the adsorption refrigeration device (5), the heat load water pump (9) drives the cooling water to the user heat load (6) to take away heat in the user heat load (6), and the adsorption refrigeration device (5) provides refrigeration 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 normal-temperature liquid metal is a gallium-indium-tin alloy.

3. The data center waste heat recovery system of claim 1, wherein: The liquid metal driven pump (1), the liquid metal cold plate (2), and the liquid metal water heat exchanger (4) are made of metal materials and non-metal materials that do not react with the liquid metal.

4. The data center waste heat recovery system of claim 1, wherein: The liquid metal cold plate (2) is a liquid metal compact cold plate, and the liquid metal compact cold plate is designed as a micro-channel flow channel.

5. The data center waste heat recovery system of claim 1, wherein: The liquid metal water heat exchanger (4) comprises a heat exchange strengthening structure, and the heat exchange strengthening structure is a fin or a micro-channel.

6. The data center waste heat recovery system of claim 1, wherein: The liquid metal water heat exchanger (4) is a heat exchange fin structure.

7. The data center waste heat recovery system of claim 1, wherein: The adsorption refrigeration device (5) comprises a heat absorption strengthening structure, and the heat absorption strengthening structure is a heat pipe structure.

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

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