Data center heat dissipation device based on Stirling engine

Abstract

The invention discloses a data center heat dissipation device based on a Stirling engine. The data center heat dissipation device comprises an immersed cooling box, the Stirling engine, a generator, a storage battery, a refrigeration engine and a refrigeration mechanism. A steam flowing area is arranged at the upper part in the immersed cooling box; the Stirling engine comprises an air cylinder and a connecting rod set. An in-cylinder piston capable of conducting piston motion is arranged in the air cylinder and divides the interior of the air cylinder into a hot cavity and a cold cavity, and the hot cavity is in heat exchange contact with the steam flowing area. The power input part of the connecting rod group is in transmission connection with the in-cylinder piston, and the power output part of the connecting rod group is in transmission connection with the power input part of the generator; the electric energy output end of the generator is electrically connected with the electric energy input end of the storage battery; the refrigeration engine is used for driving the piston in the cylinder to do piston motion; the refrigerating mechanism is used for conveying cooling liquid to circularly flow in the hot cavity and the cold cavity respectively; after the scheme is adopted, the PUE can be reduced, and the heat exchange capability of the system can be enhanced at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of data center heat dissipation, and particularly relates to a data center heat dissipation device based on a Stirling engine. BACKGROUND

[0002] The cooling system of a data center must be kept running 24 hours a day to ensure that the optimal temperature environment is maintained, and therefore, optimizing the cooling system is a crucial step.

[0003] The cooling system of a data center mainly falls into two categories: air cooling system and liquid cooling system. The air cooling system cools the server racks by cold air to effectively remove the heat generated by the servers. The liquid cooling system involves the direct contact of liquid with the heat source, and is further divided into direct cooling and indirect cooling. In direct liquid cooling, an electrically insulating liquid directly absorbs heat from electronic components to achieve efficient heat transfer. The direct liquid cooling system includes single-phase and two-phase immersion cooling systems. Liquid cooling technology has been developed for more than ten years at home and abroad, and high-efficiency cooling systems such as two-phase immersion cooling systems have been developed. In particular, in passive two-phase immersion cooling, electronic components are immersed in a variable-phase liquid bath in a closed tank, and the cooling cycle involves the evaporation and condensation processes of the liquid. This method achieves better temperature uniformity on the server surface through latent heat transfer, and can significantly reduce energy consumption compared with single-phase immersion cooling. However, in two-phase immersion cooling, the heat carried away by the boiling vapor is mostly dissipated into the air, thereby affecting the PUE value.

[0004] In addition, the traditional two-phase liquid cooling system is a cooling technology that uses a liquid working medium to absorb heat during phase change to achieve efficient heat dissipation. The liquid working medium in the system is usually converted from liquid to gas after absorbing heat in the evaporator, and the heat is transferred to the condenser in the form of steam. The working medium releases heat and then condenses into liquid in the condenser, and then returns to the evaporator through the circulating pump, thereby realizing the continuous transfer of heat. However, in two-phase liquid cooling, the cooling liquid undergoes phase change, and during the evaporation process of the cooling liquid, escape may occur, so the sealing of the container has certain requirements; however, it cannot be too sealed to prevent accidents in the cooling system, so certain safety facilities need to be set. SUMMARY

[0005] The present application aims to provide a data center heat dissipation device based on a Stirling engine to reduce PUE while enhancing the heat exchange capacity of the system.

[0006] In order to solve the above technical problems, the application provides a data center heat dissipation device based on a Stirling engine, which comprises an immersion cooling box, a Stirling engine, a generator, a storage battery, a refrigeration engine and a refrigeration mechanism; the interior of the immersion cooling box is used for loading cooling liquid to immerse a heat dissipation element; a steam flow area is arranged above the interior of the immersion cooling box; the Stirling engine is arranged on the top of the immersion cooling box; the Stirling engine comprises a cylinder and a connecting rod set; the interior of the cylinder is provided with an in-cylinder piston capable of performing piston movement; the in-cylinder piston separates the interior of the cylinder into a hot cavity and a cold cavity; the hot cavity is in heat exchange contact with the steam flow area; the power input part of the connecting rod set is in transmission connection with the in-cylinder piston; the power output part of the connecting rod set is in transmission connection with the power input part of the generator; the electric energy output end of the generator is in electrical connection with the electric energy input end of the storage battery; the power output part of the refrigeration engine is in transmission connection with the power input part of the Stirling engine; the refrigeration engine is used for driving the in-cylinder piston to perform piston movement; and the refrigeration mechanism is used for respectively conveying the circulation of the cooling liquid in the hot cavity and the cold cavity.

[0007] In one of the embodiments, the interior of the immersion cooling box is provided with a fan blade capable of controlled rotation; and the fan blade is used for obtaining electric energy from the storage battery to rotate.

[0008] In one of the embodiments, the connecting rod set comprises a piston connecting rod, an eccentric wheel, a transmission rod and a flywheel; one end of the piston connecting rod is in transmission connection with the in-cylinder piston; the other end of the piston connecting rod is in transmission connection with the eccentric wheel; the eccentric wheel is in transmission connection with the transmission rod and the flywheel; the transmission rod is in transmission connection with the power input part of the generator; and the flywheel is in transmission connection with the power output part of the refrigeration engine.

[0009] In one of the embodiments, one end of the piston connecting rod is provided with a first magnet; the in-cylinder piston is connected with a second magnet; and the first magnet and the second magnet are in magnetic adsorption connection.

[0010] In one of the embodiments, the storage battery is in power supply connection with the refrigeration engine and the refrigeration mechanism.

[0011] In one of the embodiments, the data center heat dissipation device further comprises a remote controller; and the remote controller is used for controlling the storage battery to start the refrigeration engine.

[0012] In one of the embodiments, the refrigeration mechanism comprises a first circulation passage, a second circulation passage, a heat exchanger and a circulation pump; a conveying path of the first circulation passage starts from the hot cavity, and sequentially flows through the heat exchanger, the circulation pump and then returns to the hot cavity; a conveying path of the second circulation passage starts from the cold cavity, and sequentially flows through the heat exchanger, the circulation pump and then returns to the cold cavity.

[0013] The beneficial effects of the present application are as follows:

[0014] 1. In the traditional two-phase immersion cooling system, on the one hand, most of the heat carried away by the boiling steam is dissipated through the air, and the heat dissipation efficiency is low; on the other hand, the system often relies on structures such as heat exchangers and pumps to promote the phase change and flow of the liquid, making the system structure more complex and causing additional power consumption; the present application innovatively combines a Stirling engine with a two-phase cooling system, and utilizes the energy in the steam dissipated in the two-phase immersion cooling system (i.e. immersion cooling box) through the Stirling engine, thereby improving the heat exchange efficiency of the cooling system, reducing PUE, and enhancing the high-temperature emergency response capability of the cooling system;

[0015] 2. As an improved system based on the Stirling principle, the most notable feature of the present application is the bidirectional process advantage, which not only flexibly responds to more application environments, but also achieves one-machine dual-use and simplified structure; when the Stirling engine drives the generator to generate electricity, it can ensure stable circulation, promote heat dissipation, and improve energy utilization; when the refrigeration engine drives the Stirling engine to work, the Stirling engine can be driven to do work by external force, and will become a Stirling refrigerator, which will accelerate heat dissipation in emergency situations;

[0016] 3. When the heat is conducted to the cylinder of the Stirling engine, the steam condenses and changes phase, the Stirling engine does work to generate electricity, and the generated electricity can charge the battery, which can power the water pump to drive the entire circulation. On the one hand, by utilizing the high-efficiency heat conduction efficiency of the Stirling engine, the steam and the steam flow area continuously conduct heat, promoting the condensation and phase change of the steam and accelerating the circulation of the liquid in the system, thereby improving the heat exchange efficiency of the system; on the other hand, by replacing the pump with the Stirling engine, the radiator can be designed without a pump, reducing noise, simplifying structure, and avoiding the situation that the fan blades of the pump are corroded by the working medium, thereby improving the durability of the radiator and reducing equipment maintenance costs; at the same time, by using the waste heat in the steam as the heat source of the Stirling engine, the engine is promoted to do work to generate electricity, thereby realizing the recycling and utilization of waste heat and reducing PUE; in addition, the Stirling engine will stop rotating due to overheating when it continuously contacts high-temperature heat sources, and by using non-continuous high-temperature steam as the heat source in combination with the two-phase liquid cooling system, the problem can be effectively avoided, thereby ensuring the stability and durability of the system;

[0017] 4、In the face of server overload operation, electronic components heat too fast, cooling in the data center scene is not enough to cause the heat to exceed the threshold of the emergency, the refrigeration engine can be used to control the Stirling engine to work actively, so that the Stirling engine becomes a Stirling refrigerator, and the battery can power the water pump to rotate faster, thereby promoting the flow of liquid and improving the heat exchange efficiency. The Stirling refrigerator has the advantages of compact structure, wide working temperature range, fast start, high efficiency, simple operation and the like. In an emergency, it is converted into a Stirling refrigerator to further speed up the vapor condensation phase change and quickly improve the system heat exchange efficiency, providing a new idea for large server emergency processing scheme. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 is a structural schematic diagram provided by the embodiment of the present application;

[0020] Figure 2 is a structural schematic diagram of the Stirling engine of Figure 1 ;

[0021] Figure 3 is a structural schematic diagram of the refrigeration mechanism provided by the embodiment of the present application.

[0022] The reference signs are as follows:

[0023] 100, immersion cooling box; 110, vapor flow area; 120, fan blade;

[0024] 200, Stirling engine; 210, cylinder; 211, in-cylinder piston; 212, hot cavity; 213, cold cavity; 220, connecting rod set; 221, piston connecting rod; 222, eccentric wheel; 223, transmission rod; 224, flywheel; 225, first magnet; 226, second magnet;

[0025] 300, generator;

[0026] 400, battery;

[0027] 500, refrigeration engine;

[0028] 600, refrigeration mechanism; 610, first circulation passage; 620, second circulation passage; 630, heat exchanger; 640, circulation pump;

[0029] 700, remote controller. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0031] The present application provides a data center heat dissipation device based on Stirling engine, which is implemented as shown in the embodiment Figures 1 to 3 The data center heat dissipation device based on Stirling engine includes an immersion cooling tank 100, a Stirling engine 200, a generator 300, a storage battery 400, a refrigeration engine 500 and a refrigeration mechanism 600. The interior of the immersion cooling tank 100 is used to load cooling liquid to immerse the heat dissipation elements. The upper part of the interior of the immersion cooling tank 100 is provided with a steam flow area 110, which can be provided with a heat dissipation pipeline to realize the flow of steam. The Stirling engine 200 is arranged at the top of the immersion cooling tank 100. The Stirling engine 200 includes a cylinder 210 and a connecting rod set 220. The interior of the cylinder 210 is provided with an in-cylinder piston 211 which can move. The in-cylinder piston 211 divides the interior of the cylinder 210 into a hot cavity 212 and a cold cavity 213. The hot cavity 212 is in heat exchange contact with the steam flow area 110. The power input part of the connecting rod set 220 is in transmission connection with the in-cylinder piston 211. The power output part of the connecting rod set 220 is in transmission connection with the power input part of the generator 300. The power output end of the generator 300 is in electrical connection with the power input end of the storage battery 400. The power stored in the storage battery 400 can be used by the data center heat dissipation device. For example, the storage battery 400 is in power supply connection with the refrigeration engine 500 and the refrigeration mechanism 600 in this embodiment. The power output part of the refrigeration engine 500 is in transmission connection with the power input part of the Stirling engine 200. The refrigeration engine 500 is used to drive the in-cylinder piston 211 to move. The refrigeration mechanism 600 is used to respectively transport the cooling liquid to circulate in the hot cavity 212 and the cold cavity 213.

[0032] In application, the immersion cooling tank 100 is used to load cooling liquid to immerse the heat dissipation elements. Once the cooling liquid in the immersion cooling tank 100 is heated to evaporate to form steam, the steam will flow in the steam flow area 110 and transfer heat to the hot cavity 212 of the Stirling engine 200, so as to drive the in-cylinder piston 211 to move. The movement of the in-cylinder piston 211 will drive the connecting rod set 220 to move and provide power input for the generator 300, so that the generator 300 can generate power to be transmitted to the storage battery 400 for storage.

[0033] And once the refrigeration engine 500 is controlled to start, the in-cylinder piston 211 can be controlled to move, and since the refrigeration mechanism 600 at this time can respectively transport the cooling liquid to circulate and flow in the hot cavity 212 and the cold cavity 213, the Stirling engine 200 at this time is substantially equivalent to a Stirling refrigerator, thereby achieving the function of active heat dissipation.

[0034] As shown in Figure 1 This embodiment provides the inside of the immersion cooling box 100 with controllable rotating fan blades 120 for obtaining power from the battery 400 to rotate.

[0035] After adopting this arrangement, as long as the battery 400 controls the fan blades 120 to start, the cooling liquid inside the immersion cooling box 100 can be promoted to flow, thereby enhancing the cooling effect on the heat dissipation element.

[0036] As shown in Figure 1 This embodiment provides the connecting rod set 220 including a piston connecting rod 221, an eccentric wheel 222, a transmission rod 223, and a flywheel 224; one end of the piston connecting rod 221 is in transmission connection with the in-cylinder piston 211, such as this embodiment providing that the one end of the piston connecting rod 221 is provided with a first magnet 225, the in-cylinder piston 211 is connected with a second magnet 226, the first magnet 225 and the second magnet 226 are in magnetic adsorption connection, and the other end of the piston connecting rod 221 is in transmission connection with the eccentric wheel 222; the eccentric wheel 222 is in transmission connection with the transmission rod 223 and the flywheel 224; the transmission rod 223 is in transmission connection with the power input part of the generator 300; and the flywheel 224 is in transmission connection with the power output part of the refrigeration engine 500.

[0037] After adopting this arrangement, once the in-cylinder piston 211 moves, it will drive the piston connecting rod 221 to move up and down, the up-and-down movement of the piston connecting rod 221 will drive the eccentric wheel 222 to rotate, the rotation of the eccentric wheel 222 will drive the transmission rod 223 and the flywheel 224 to rotate, and the rotation of the transmission rod 223 will input power to the generator 300, thereby achieving power generation of the generator 300.

[0038] It should be noted that since the flywheel 224 is in transmission connection with the power output part of the refrigeration engine 500, once the refrigeration engine 500 controls the flywheel 224 to rotate, the flywheel 224 will drive the eccentric wheel 222 to rotate, the rotation of the eccentric wheel 222 will drive the piston connecting rod 221 to move up and down, and the up-and-down movement of the piston connecting rod 221 will drive the in-cylinder piston 211 to move up and down, thereby achieving active work of the Stirling engine 200.

[0039] In the process of the Stirling engine 200 actively working, the refrigeration mechanism 600 can accelerate the circulation of the cooling liquid in the hot cavity 212 and the cold cavity 213, so that the Stirling engine 200 can accelerate the heat absorption of the steam flow area 110, that is, the Stirling engine 200 is equivalent to a Stirling refrigerator.

[0040] As shown in Figure 1 In this embodiment, the data center cooling device further comprises a remote controller 700, which is used to control the battery 400 to start the refrigeration engine 500.

[0041] As shown in Figure 2 and Figure 3 In this embodiment, the refrigeration mechanism 600 comprises a first circulation passage 610, a second circulation passage 620, a heat exchanger 630 and a circulation pump 640; the delivery path of the first circulation passage 610 starts from the hot cavity 212, and then flows through the heat exchanger 630 and the circulation pump 640 and returns to the hot cavity 212; the delivery path of the second circulation passage 620 starts from the cold cavity 213, and then flows through the heat exchanger 630 and the circulation pump 640 and returns to the cold cavity 213.

[0042] After the above arrangement, the cooling liquid output from the hot cavity 212 is sent to the heat exchanger 630 for heat exchange and cooling, and the cooled cooling liquid is pumped to the hot cavity 212 by the circulation pump 640 for heat absorption, and the process is repeated continuously; similarly, the cooling liquid output from the cold cavity 213 is sent to the heat exchanger 630 for heat exchange and cooling, and the cooled cooling liquid is pumped to the cold cavity 213 by the circulation pump 640 for heat absorption, and the process is repeated continuously.

[0043] The above is the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, can make several improvements and refinements, these improvements and refinements are also considered to be within the scope of the present application.

Claims

1.A data center cooling device based on a Stirling engine, characterized in that, it comprises an immersion cooling tank, a Stirling engine, a generator, a battery, a refrigeration engine and a refrigeration mechanism; an inside of the immersion cooling tank is used to load a cooling liquid to immerse a component to be cooled, and a steam flow area is arranged above the inside of the immersion cooling tank; the Stirling engine is arranged on a top of the immersion cooling tank, and the Stirling engine comprises a cylinder and a connecting rod set; an inside of the cylinder is provided with an in-cylinder piston capable of performing piston movement, the in-cylinder piston separates the inside of the cylinder into a hot cavity and a cold cavity, and the hot cavity is in heat exchange contact with the steam flow area; a power input part of the connecting rod set is in transmission connection with the in-cylinder piston, and a power output part of the connecting rod set is in transmission connection with a power input part of the generator; an electric energy output end of the generator is in electrical connection with an electric energy input end of the battery; a power output part of the refrigeration engine is in transmission connection with a power input part of the Stirling engine, and the refrigeration engine is used to drive the in-cylinder piston to perform piston movement; the refrigeration mechanism is used to respectively transport the cooling liquid to circulate in the hot cavity and the cold cavity. 2.The data center cooling device according to claim 1, characterized in that, the inside of the immersion cooling tank is provided with a fan blade capable of controlled rotation, and the fan blade is used to obtain electric energy from the battery to rotate. 3.The data center cooling device according to claim 1, characterized in that, the connecting rod set comprises a piston connecting rod, an eccentric wheel, a transmission rod and a flywheel; one end of the piston connecting rod is in transmission connection with the in-cylinder piston, and the other end of the piston connecting rod is in transmission connection with the eccentric wheel; the eccentric wheel is in transmission connection with the transmission rod and the flywheel; the transmission rod is in transmission connection with the power input part of the generator; the flywheel is in transmission connection with the power output part of the refrigeration engine. 4.The data center cooling device according to claim 3, characterized in that, one end of the piston connecting rod is provided with a first magnet, the in-cylinder piston is connected with a second magnet, and the first magnet and the second magnet are in magnetic adsorption connection. 5.The data center cooling device according to claim 1, characterized in that, the battery is in power supply connection with the refrigeration engine and the refrigeration mechanism. 6.The data center cooling device according to claim 5, characterized in that, the data center cooling device further comprises a remote controller, and the remote controller is used to control the battery to start the refrigeration engine. 7.The data center cooling device according to claim 1, characterized in that, the refrigeration mechanism comprises a first circulation passage, a second circulation passage, a heat exchanger and a circulating pump; a transport path of the first circulation passage starts from the hot cavity, and sequentially flows through the heat exchanger and the circulating pump to return to the hot cavity; a transport path of the second circulation passage starts from the cold cavity, and sequentially flows through the heat exchanger and the circulating pump to return to the cold cavity.

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