CN110366359B

CN110366359B - Fountain type double-circulation super computer cooling system

Info

Publication number: CN110366359B
Application number: CN201910680507.9A
Authority: CN
Inventors: 戢觉佑
Original assignee: Tianjin Shenwei Science & Technology Co ltd
Current assignee: Tianjin Shenwei Science & Technology Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-11-03
Anticipated expiration: 2039-07-26
Also published as: CN110366359A

Abstract

The invention relates to a fountain type double-circulation super computer cooling system which comprises a subcooler, a circulating pump, a blade case, a condenser, a secondary cooling system, a pipeline and a valve, wherein an evaporative cooling medium is stored in the subcooler, the blade case and the connected pipeline. The cooling system is divided into two communicated cycles: steam in the blade case rises to the condenser through the gas collecting pipe and the gas collecting valve to be condensed into liquid, and flows into the blade case through the liquid return pipe to realize self circulation of the steam; high-temperature medium in the blade case enters the subcooler through the overflow pipe, and flows into the blade case through the liquid inlet pipe after being cooled, so that the controllable circulation of evaporative cooling medium is realized. The invention uses medium phase change and forced convection to carry out heat exchange, thus better solving the problem of difficult heat dissipation of equipment; the energy is saved, the environment is protected, no electromagnetic radiation exists outside, no dust pollution exists, and the noise is low; and the operation cost is low, the radiating efficiency is high, the equipment placing density can be improved, and the machine room utilization rate is improved.

Description

Fountain type double-circulation super computer cooling system

Technical Field

The invention relates to a super computer cooling system, in particular to a fountain type double-circulation super computer cooling system.

Background

With the continuous development of electronic technology, the circuit integration degree is higher and higher, a Central Processing Unit (CPU) of a computer becomes a core area with highly concentrated heat, and the high heat can cause the problems of unstable system operation, short service life of an integrated circuit, damage of devices and the like, and can seriously affect the normal operation of the computer. The traditional air cooling heat dissipation mode can not meet the requirements of the existing high-density super computer, and the heat dissipation problem becomes a bottleneck restricting the development of the computer. Meanwhile, when the traditional cooling mode is adopted, the energy consumption for cooling the data center accounts for 30% -40% of the total energy consumption of the data center, the energy consumption is huge, and the noise exceeds the standard, so that the method is a major problem to be solved urgently.

The evaporative cooling technology absorbs and releases heat by utilizing the phase change process of a medium, so that the cooling efficiency is high, and the cooling effect is uniform; the freezing point of the cooling medium is lower than the ambient temperature, so that the cooling medium has no anti-freezing problem, and has the advantages of strong insulativity, no combustion and explosion and high safety. At present, a spray type evaporative cooling system and a soaking type self-circulation evaporative cooling system are mainly applied to a supercomputer system.

The spraying type evaporative cooling system uniformly sprays the pressurized medium onto a heating component through the atomizing nozzle, and the medium absorbs heat and is vaporized and enters the condenser along the gas collection pipeline. The system has the advantages of complex pipeline, high manufacturing cost and easy leakage, the pulsating pressure of spraying can cause poor contact of the connector, the uneven spraying can cause the change of the locally distributed capacitance of the circuit board, the working stability of a high-frequency circuit is influenced, and components can be damaged in serious conditions.

The soaking type self-circulation evaporative cooling system soaks the components in the medium, and the heat exchange area is small, so that the liquid flow is slow, the heat exchange effect is poor, and the heat of the high-power multi-core CPU is difficult to transfer. Meanwhile, the ambient temperature also has a great influence on the heat dissipation of the system.

Disclosure of Invention

The invention aims to improve the defects and problems in the background art, and provides a fountain type double-circulation super computer cooling system, which improves the cooling efficiency and reduces the loss and noise.

The fountain type double-circulation super computer cooling system consists of a subcooler, a circulating pump, a filter, a cabinet, a blade case, a condenser, a secondary cooling system, a pressure sensor, a pipeline and a valve. The cooling system comprises two cycles: steam self-circulation; ② the liquid can be controlled and circulated.

The steam self-circulation is composed of each blade case, a steam collecting pipe on the upper part of the blade case, a condenser and a liquid return pipe. The heating part in the blade case is immersed in the evaporative cooling medium, the steam rises to the condenser through the gas collecting pipe and the gas collecting valve, is condensed into liquid through secondary cooling, and flows into the blade case through the liquid return pipe and the liquid return valve to form steam self-circulation.

The controllable liquid circulation consists of liquid inlet pipe and valve in the lower part of each blade case, overflow pipe and overflow valve in the upper part, pump, subcooler, etc. The working state of the cycle is divided into two types, namely, the cycle is normally open and is synchronous with the opening and closing of the host; and secondly, the intermittent starting is carried out according to the temperature condition. Typically an intermittent on mode. When the chip or other heat source is detected to exceed the preset temperature and pressure, the pump is started, and the flow of the system is increased to reduce the temperature of the heat source and the pressure of the system. The pump is stopped when the heat source temperature and pressure decrease to predetermined values.

A certain amount of evaporative cooling medium is stored in the subcooler, and the lower part of the subcooler is connected with the circulating pump through a liquid pipeline to provide medium for the controllable circulation of the liquid. The upper part of the cooling system is connected with the overflow pipe and the liquid discharge pipe, receives the high-temperature medium and realizes the cooling of the medium through a secondary cooling system.

The circulating pumps are used for pressurizing the medium, and are two in total, one is a working pump, and the other is a standby pump. The two ends of the pump are both provided with circulating pump valves, so that the pump can be conveniently replaced by switching off the circulating pump valves. The flow of the pump can be controlled in real time through the pressure signal provided by the pressure sensor and the temperature signal provided by the blade case, and the cooling effect and the system pressure are ensured.

The condenser is arranged above the blade case, so that steam can enter the condenser conveniently, and the steam is changed into liquid through the secondary cooling system. The upper part of the condenser is provided with a larger air compression space, so that the system can exhaust air when being started for the first time, and the exhaust air is not exhausted any more later under the normal condition. Therefore, the system is always kept at micro positive pressure and micro negative pressure, and the requirement on the pressure resistance strength of the system is reduced. The upper part of the condenser is provided with a safety valve and an exhaust valve.

The blade chassis has a total of five ducts. The liquid inlet pipe is positioned at the bottom and is an inflow channel of the medium; the gas collecting pipe is positioned at the top and is an outflow channel of the steam; the liquid return pipe is positioned at the lower part and is an inflow channel of the steam self-circulation medium; the overflow pipe is positioned at a position slightly higher than the heat source of the blade and is an outflow channel of the high-temperature medium, so that the heat source of the blade is ensured to be immersed in the medium; the drain pipe is positioned at the bottom and used for draining the medium during maintenance. All install the valve in five pipelines, and can close completely to the extraction of convenient blade quick-witted case. The valve can also be a quick connector with a self-sealing function.

The evaporative cooling medium adopted by the invention is an environment-friendly and insulating fluorocarbon compound.

The invention adopts a mode of combining physics and dynamics, and carries out heat exchange by medium phase change and forced convection, thereby better solving the problems of high density and difficult heat dissipation of the current electronic information equipment; the stability is good, the heat dissipation effect is good, and the service life of the equipment can be prolonged; the energy-saving effect is good, all nodes of the server and a power supply cooling fan are eliminated, and a precise air conditioner is not required to be added in a machine room; the cooling system is a closed whole, and has no chemical radiation, electromagnetic radiation, dust pollution and noise; the operation cost is low, and the radiating efficiency is high, can improve equipment and place density, improves the computer lab rate of utilization.

Drawings

FIG. 1 is a fountain type dual cycle supercomputer cooling system.

In the figure: 1. a subcooler; 2. a circulating pump I; 3. a circulating pump II; 4. a liquid line; 5. a filter; 6. evaporating the cooling medium; 7. a liquid inlet valve; 8. a liquid inlet pipe; 9. a cabinet; 10. a blade chassis; 11. a liquid discharge pipe; 12. a pressure sensor; 13. a liquid return pipe; 14. an overflow pipe; 15. a gas collecting pipe; 16. an overflow valve; 17. a gas collection valve; 18. a liquid return valve; 19. a drain valve; 20. a condenser; 21. a secondary cooling system; 22. and (4) circulating a pump valve.

Detailed Description

As shown in fig. 1, the fountain type dual-cycle supercomputer cooling system of the present invention includes a subcooler 1, a circulation pump 2, a filter 5, a cabinet 9, a blade case 10, a condenser 20, a secondary cooling system 21, a pipeline and a valve. The evaporative cooling medium is placed in the subcooler 1, the blade case 10, the liquid pipeline 4 and the like, and the heat source of the blades is immersed in the medium. The subcooler 1 is connected with inlets of a circulating pump I2 and a circulating pump II 3 through a liquid pipeline 4, the two circulating pumps are connected in parallel, one circulating pump is a working pump, the other circulating pump is a standby pump, circulating pump valves 22 are installed at two ends of the two circulating pumps, and the pumps are conveniently replaced by switching off the circulating pump valves; outlets of the circulating pump I2 and the circulating pump II 3 are connected with the filter 5, the medium flows through the filter 5, and the medium flows into the blade case 10 through the liquid inlet valve 7 and the liquid inlet pipe 8; the blade case 10 has five pipelines in total, wherein the liquid inlet pipe 8 is positioned at the bottom of the blade case 10, is connected with the blade case 10 through the liquid inlet valve 7 and is a medium inflow channel; the gas collecting pipe 15 is positioned at the top of the blade case 10, and steam enters the condenser 20 through the gas collecting valve 17 and is an outflow channel of the steam; the liquid return pipe 13 is positioned at the lower part of the blade case 10, is connected with the lower part of the condenser 20 through a liquid return valve 18, and is an inflow channel of steam self-circulation media; the overflow pipe 14 is positioned at a position slightly higher than the heat source of the blade, is connected with the subcooler 1 through an overflow valve 16 and is an outflow channel of a high-temperature medium; the liquid discharge pipe 11 is positioned at the bottom of the blade case 10, is connected with the subcooler 1 through a liquid discharge valve 19 and is used for discharging media in the blade case 10 during maintenance; the subcooler 1 and the condenser 20 share a secondary cooling system 21, which realizes the cooling of the medium in the subcooler 1 and the change of the vapor in the condenser 20 into liquid. All valves of the present invention can be completely closed to facilitate the extraction of the blade enclosure 10, and all valves can be replaced with quick connectors having self-sealing functions. The blade chassis 10 of the present invention may be provided in one or more, and when the blade chassis is provided in plural, the number of the liquid inlet pipe 8, the gas collecting pipe 15, the liquid return pipe 13, the overflow pipe 14, and the liquid discharge pipe 11 is corresponding to the number of the blade chassis 10. The invention is provided with a pressure sensor 12 which is arranged on the top of the blade case 10 and used for monitoring the pressure in the blade case 10, and the flow of the circulating pump can be controlled in real time through a pressure signal provided by the pressure sensor 12 and a temperature signal provided by the blade case 10, thereby ensuring the cooling effect and the system pressure. The pressure sensor 12 also has the function of opening the gas collecting valve 17 and the liquid return valve 18 when the monitored steam pressure in the blade case 10 is too high, starting the steam self-circulation system, cooling the generated steam into liquid through the condenser 20 and the secondary cooling system 21, and then returning the liquid into the blade case 10. The evaporative cooling medium adopted by the invention is environment-friendly and insulating fluorocarbon, and has good stability and good heat dissipation effect. A filter 5 is disposed on the liquid pipeline 4 entering the blade enclosure 10 for filtering the cooling medium, so as to further ensure that the cooling medium entering the blade enclosure 10 is pure.

When the super computer works, the cooling system comprises two circulation modes: vapor self-circulation and liquid controlled circulation. The steam self-circulation mode is as follows: the heat source of the blade is immersed in the evaporative cooling medium, the heat generated by the blade is transferred to the evaporative cooling medium 6, the medium is heated and then is evaporated and boiled to generate steam, the steam rises to the condenser 20 through the gas collecting pipe 15 and the gas collecting valve 17, and is condensed into liquid after secondary cooling, and the liquid flows into the blade case 10 through the liquid return pipe 13 and the liquid return valve 18 to complete the self-circulation of the steam. The condenser 20 of the present invention is mounted above the blade enclosure 10 to facilitate the entry of steam and to convert the steam into liquid through the secondary cooling system 21. The condenser 20 is provided with a large air compression space at the upper part thereof, so that the system can be exhausted when being started for the first time, and the system can not be exhausted later under the normal condition. Therefore, the system is always kept at micro positive pressure and micro negative pressure, and the requirement on the pressure resistance strength of the system is reduced. The upper part of the condenser 20 is provided with a safety valve and an exhaust valve for pressure relief when the system pressure is overlarge, so that the safety of the system is ensured.

Another controllable liquid circulation mode of the invention is completed by a liquid inlet pipe 8 and a liquid inlet valve 7 at the lower part of the blade case 10, an overflow pipe 14 and an overflow valve 16 at the upper part, a circulating pump, a subcooler 1 and the like. The working state of the cycle is divided into two types, namely, the cycle is normally open and is synchronous with the opening and closing of the host; and secondly, the intermittent starting is carried out according to the temperature condition. Typically an intermittent on mode. When the chip or other heat source is detected to exceed the preset temperature and pressure, the circulating pump is started, and the flow of the system is increased to reduce the temperature and the pressure of the heat source. The circulation pump is stopped when the heat source temperature and the system pressure decrease to predetermined values. When the liquid level inside the blade case 10 is higher than the overflow pipe 14, the high temperature liquid flows into the supercooler 1 through the overflow pipe 14, and heat exchange is performed by secondary cooling.

Claims

1. A fountain-type dual-cycle supercomputer cooling system, characterized by: the blade machine box comprises a blade machine box (10) and a steam self-circulation system, wherein the steam self-circulation system is used for condensing steam generated in the blade machine box (10); and a liquid controlled circulation system for cooling the blade enclosure (10);

the steam self-circulation system comprises a blade case (10), a steam collecting pipe (15) on the upper part of the blade case, a condenser (20) and a liquid return pipe (13) to form a loop, steam in the blade case (10) rises to the condenser (20) through the gas collecting pipe (15) and a gas collecting valve to be condensed into liquid, and the liquid flows into the blade case (10) through the liquid return pipe (13);

the controllable liquid circulation system consists of a blade case (10), a liquid inlet pipe (8) at the lower part of the blade case, an overflow pipe (14) at the upper part of the blade case and a subcooler (1) to form a loop, evaporative cooling media are stored in the subcooler (1), the blade case (10) and connected pipelines, high-temperature media in the blade case (10) enter the subcooler (1) through the overflow pipe (14), and flow into the blade case (10) through the liquid inlet pipe (8) after being cooled;

the system comprises a secondary cooling system (21) which is respectively connected with a subcooler (1) and a condenser (20) to realize the cooling of media in the subcooler (1) and the change of vapor in the condenser (20) into liquid.

2. The fountain dual-cycle supercomputer cooling system of claim 1, wherein: the device comprises a circulating pump, a filter, a pressure sensor and a pressure sensor, wherein the circulating pump is used for pressurizing a cooling medium, and two circulating pumps are arranged at an outlet of the filter (1) in parallel, one is a working pump, and the other is a standby pump; both ends of the circulating pump are provided with circulating pump valves (22) to facilitate the replacement of the pump by switching off.

3. The fountain dual-cycle supercomputer cooling system of claim 1, wherein: the circulating pump cooling system comprises a pressure sensor (12) which is arranged at the top of a blade case (10), and the flow of the circulating pump can be controlled in real time through a pressure signal provided by the pressure sensor (12) and a temperature signal provided by the blade case (10), so that the cooling effect and the system pressure are ensured.

4. The fountain dual-cycle supercomputer cooling system of claim 1, wherein: the device comprises a filter (5) which is arranged on an inlet pipeline (6) of a blade case (10) and is used for filtering a cooling medium.

5. The fountain dual-cycle supercomputer cooling system of claim 1, wherein: the condenser (20) is arranged above the blade case (10), and the upper part of the condenser (20) is provided with a safety valve and an exhaust valve.

6. The fountain dual cycle supercomputer cooling system of claim 1, or 3 or 4, wherein: the bottom of the blade case (10) is provided with a liquid discharge pipe (11) which is connected with the subcooler (1) and used for discharging media in the blade case (10) during maintenance.

7. The fountain dual-cycle supercomputer cooling system of claim 1, wherein: the blade chassis (10) is arranged into one or more than one, and when the blade chassis is arranged into a plurality of blade chassis, the number of the liquid inlet pipe (8), the gas collecting pipe (15), the liquid return pipe (13), the overflow pipe (14) and the liquid discharge pipe (11) is corresponding to the number of the blade chassis (10).

8. The fountain dual-cycle supercomputer cooling system of claim 7, wherein: valves are arranged on the liquid inlet pipe (8), the gas collecting pipe (15), the liquid return pipe (13), the overflow pipe (14) and the liquid discharge pipe (11), and the valves are replaced by self-sealing quick-plugging connectors.