CN115297697B - Immersed jet cooling device and method for heat dissipation of data center server - Google Patents
Immersed jet cooling device and method for heat dissipation of data center server Download PDFInfo
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- CN115297697B CN115297697B CN202211059615.2A CN202211059615A CN115297697B CN 115297697 B CN115297697 B CN 115297697B CN 202211059615 A CN202211059615 A CN 202211059615A CN 115297697 B CN115297697 B CN 115297697B
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- 238000001816 cooling Methods 0.000 title claims abstract description 126
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 12
- 239000007788 liquid Substances 0.000 claims abstract description 162
- 239000000110 cooling liquid Substances 0.000 claims abstract description 88
- 238000007654 immersion Methods 0.000 claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims description 45
- 238000010992 reflux Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 10
- 230000004907 flux Effects 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 230000005855 radiation Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20763—Liquid cooling without phase change
- H05K7/20781—Liquid cooling without phase change within cabinets for removing heat from server blades
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
The invention relates to the technical field of data center liquid cooling, in particular to an immersion jet cooling device for heat dissipation of a data center server, which consists of a liquid cooling cabinet body, a cooling heat dissipation device and a server. The cooling heat dissipation device comprises a cooling liquid pipe section assembly and a jet flow cavity, wherein one part of cooling liquid enters the liquid refrigerator body through the pipe section assembly to completely submerge the server and the jet flow cavity, and the other part of cooling liquid enters the jet flow cavity through the pipe section assembly; the jet cavity is formed by overlapping a buffer cavity, a rectifying net and a jet orifice plate and is used for spraying cooling liquid to the surface of the server. The invention adopts a mode of combining an immersion cooling technology and a jet cooling technology, fully utilizes the cooling liquid in the liquid refrigerator, absorbs the heat productivity of the server by means of jet impact in the liquid and accelerating disturbance of the cooling liquid, and simultaneously effectively solves the problem of rapid heat dissipation in a local high heat flux area of the server and the problem of heat waste generated by air jet cooling and air heat exchange.
Description
Technical Field
The invention relates to the technical field of data center liquid cooling, in particular to an immersion jet cooling device for heat dissipation of a data center server.
Background
With the increasing number and size of data centers, data center refrigeration presents a serious challenge, and how to solve the problem of efficient heat dissipation of data center servers is currently in need of solution. The air cooling technology has low heat radiation capability, can not meet the heat radiation requirement of a server with high heat flux density in the future, and the liquid cooling has the advantages of strong fluidity, high heat exchange coefficient and the like, which is a research hot spot of the heat radiation technology of the server of the current data center.
Submerged cooling is a technique in which the hardware of a server is completely immersed in a coolant, and the amount of heat generated by the server is absorbed by the flowing coolant. In a single-phase immersed system, the cooling liquid is always kept in a liquid state in the heat exchange process, and equipment heat dissipation is realized through system circulation, so that the system is safe and reliable. Some patents have proposed the application of submerged cooling technology. Patent CN108966611a proposes a liquid immersion cooling type exchange and an exchange unit, in which a heat generating device inside the exchange is immersed in an insulating cooling liquid, so as to cool the heat generating device inside the exchange. However, in a specific operation process, the unit cannot effectively solve the problem of rapid heat dissipation of a local high heat flux area of the unit.
The jet cooling directly sprays the cooling liquid onto the heat exchange surface for heat exchange, and meanwhile, the cooling heat exchange capacity is enhanced through local convection heat exchange brought by jet flow, so that the heat dissipation problem of a local heat concentration area can be effectively solved. Some patents have proposed application methods combining submerged cooling technology and jet cooling technology. Patent CN112099593a proposes a novel liquid cooling heat dissipation system, sprays the heat conduction liquid towards the heat conduction liquid of cavity through jet mechanism, has improved the flow effect of the heat conduction liquid of cavity, has strengthened the heat transfer effect of liquid cooling heat dissipation system to electronic components. However, during operation, the cooling liquid cannot fill the whole space, and the air in the cavity can cause heat loss of the cooling liquid. In addition, in the scheme, jet impact is only applied to small electronic devices, and cannot be applied to a data center server in a large scale, and an application mode of the immersion jet cooling technology in the data center needs to be explored.
The invention provides an immersion jet cooling device and method for heat dissipation of a data center server. The server is fully immersed in the cooling liquid by adopting a mode of combining an immersion cooling technology and a jet cooling technology, and the heating value of the server is absorbed by virtue of the flowing cooling liquid. Meanwhile, the jet cavity fully immersed in the cooling liquid sprays the cooling liquid to the surface of the server, so that the cooling liquid in the liquid refrigerator can be fully utilized, the problem of rapid heat dissipation in a local high heat flux area of the server is effectively solved, and the problem of heat waste generated by air jet cooling and air heat exchange is effectively solved.
Disclosure of Invention
The purpose of the invention is that: in order to solve the defects in the background art, an immersion jet cooling device for heat dissipation of a data center server is provided.
The technical scheme adopted by the invention is as follows:
A submerged jet cooling device for heat dissipation of a data center server comprises a liquid cooling cabinet body, a cooling heat dissipation device and a server.
The liquid cooling cabinet body comprises a liquid cooling cabinet outer wall and a liquid cooling cabinet inner wall, and cooling liquid is immersed in the liquid cooling cabinet body; the liquid cooling cabinet is characterized in that a liquid inlet and a liquid outlet are formed in the outer wall of the liquid cooling cabinet, the liquid inlet and the liquid outlet are positioned on the same side of the outer wall of the liquid cooling cabinet, and the position of the liquid outlet is higher than that of the liquid inlet; the inner wall of the liquid cooling cabinet is positioned above the liquid inlet, and a gap is reserved between the left end part of the inner wall of the liquid cooling cabinet and the left side wall surface of the outer wall of the liquid cooling cabinet;
the cooling heat dissipation device comprises a cooling liquid pipe section assembly and a jet flow cavity;
The cooling liquid horizontal main pipe is connected with a liquid inlet of the liquid refrigerator, and after passing through the outer wall of the liquid cooling cabinet, the cooling liquid horizontal main pipe is divided into two branch pipes of a jet horizontal pipe and a submerged horizontal pipe through a three-way joint; the jet horizontal pipe is communicated with the jet cavity through a jet vertical pipe, and the immersed horizontal pipe is communicated with the liquid cooling cabinet body;
The bottom of the jet flow cavity is arranged on the inner wall of the liquid cooling cabinet, the top-most height of the jet flow cavity is lower than the bottom-most height of the liquid outlet, and the jet flow cavity is parallel to the left side wall and the right side wall of the outer wall of the liquid cooling cabinet; the bottoms of the first jet cavity, the second jet cavity, the third jet cavity, the fourth jet cavity and the fifth jet cavity are correspondingly communicated with a first jet vertical pipe, a second jet vertical pipe, a third jet vertical pipe, a fourth jet vertical pipe and a fifth jet vertical pipe respectively, and the jet vertical pipes penetrate through the inner wall of the liquid cooling cabinet and are connected with jet horizontal pipes;
The jet cavity comprises a jet orifice plate, a rectifying net and a buffer cavity; the rectifying net is a stainless steel woven silk net with the same size as the buffer cavity; the buffer cavities, the rectifying nets and the jet orifice plates of the first jet cavity and the fifth jet cavity are arranged towards one side of the inside of the liquid cooling cabinet body, and the jet orifice plates and the rectifying nets of the second jet cavity, the third jet cavity and the fourth jet cavity are symmetrically arranged at two sides of the buffer cavities; the jet impact holes are distributed on the jet orifice plate in a staggered array mode, and cooling liquid sprayed out of all the jet impact holes on the jet orifice plate can cover the surface of a corresponding server;
The bottom of the server is placed on the inner wall of the liquid cooling cabinet, the server is completely immersed in cooling liquid, and the first server, the second server, the third server and the fourth server are arranged at equal intervals.
Further, the height of the server is consistent with the height of the jet cavity; the relative positions of the jet cavity and the server are as follows from the near end to the far end of the liquid inlet: the system comprises a first jet cavity, a first server, a second jet cavity, a second server, a third jet cavity, a third server, a fourth jet cavity, a fourth server and a fifth jet cavity, wherein the jet cavities and the servers are arranged in a pairwise equidistant manner.
Further, the submerged pump is fixed on the inner wall of the liquid cooling cabinet, the bottom of the submerged pump is connected with the reflux vertical pipe, and the reflux vertical pipe penetrates through the inner wall of the liquid cooling cabinet to be connected with the horizontal main pipe; the first vertical pipe flow regulating valve, the second vertical pipe flow regulating valve, the third vertical pipe flow regulating valve, the fourth vertical pipe flow regulating valve and the fifth vertical pipe flow regulating valve are respectively and correspondingly arranged at the tail ends of the first jet flow vertical pipe, the second jet flow vertical pipe, the third jet flow vertical pipe, the fourth jet flow vertical pipe and the fifth jet flow vertical pipe; the horizontal pipe flow regulating valve is arranged at the starting end of the jet horizontal pipe; and power lines of the submersible pump and the flow regulating valve penetrate out from sealing holes on the outer wall of the liquid cooling cabinet.
Further, the indoor side heat exchange device comprises a liquid pump, a plate heat exchanger and a liquid storage tank, wherein the liquid outlet is communicated with the liquid storage tank through a pipeline, the liquid storage tank is communicated with a hot end inlet of the plate heat exchanger through a pipeline, a hot end outlet of the plate heat exchanger is communicated with the liquid pump through a pipeline, and the liquid pump is communicated with a liquid inlet through a pipeline; the outdoor side heat exchange device comprises a liquid cooling outdoor unit, a circulating pump and a plate heat exchanger, wherein the liquid cooling outdoor unit is communicated with the circulating pump through a pipeline, the circulating pump is communicated with a cold end inlet of the plate heat exchanger through a pipeline, and a cold end outlet of the plate heat exchanger is communicated with the liquid cooling outdoor unit through a pipeline.
A method of operating an immersion jet cooling device for data center server heat dissipation, comprising:
The cooling liquid passes through the liquid inlet from the horizontal main pipe, and enters the incident horizontal pipe and the immersed horizontal pipe at the three-way joint respectively; a part of cooling liquid enters the liquid refrigerator body through the immersed horizontal pipe to completely immerse the server, and the heating value of the server is absorbed; simultaneously, the other part of cooling liquid sequentially enters the jet cavity through the jet horizontal pipe, the horizontal pipe flow regulating valve, the jet vertical pipe and the vertical pipe flow regulating valve;
In the jet flow cavity, the cooling liquid firstly enters the buffer cavity to eliminate the initial speed before entering the jet flow cavity, then flows through the rectifying net to be uniform, and the treated cooling liquid is ejected out of all jet flow impact holes on the jet flow pore plate at high speed and directly impacts the surface of a corresponding server to realize heat dissipation;
After the sprayed cooling liquid is mixed with the immersed cooling liquid, one part of the cooling liquid leaves from a liquid outlet and enters an indoor side for heat exchange circulation, and the other part of the cooling liquid enters a horizontal main pipe from a reflux vertical pipe through a submersible pump to drive the cooling liquid to circularly move in the liquid cooling cabinet body;
the cooling liquid flowing out from the liquid outlet respectively returns to the inside of the liquid cooling cabinet body through the liquid storage tank, the plate heat exchanger, the liquid pump and the liquid inlet to form indoor heat exchange circulation; the cold source respectively passes through the plate heat exchanger, the liquid cooling outdoor unit and the circulating pump to form outdoor side heat exchange circulation for cooling the cooling liquid flowing through the plate heat exchanger.
Further, through adjusting the first riser flow regulating valve, the second riser flow regulating valve, the third riser flow regulating valve, the fourth riser flow regulating valve and the fifth riser flow regulating valve, the flow of cooling liquid entering the first jet cavity, the second jet cavity, the third jet cavity, the fourth jet cavity and the fifth jet cavity is respectively controlled in a one-to-one correspondence manner; the flow rate of the cooling liquid entering the incident horizontal pipe can be controlled by adjusting the flow rate adjusting valve of the horizontal pipe.
The beneficial effects of the invention are as follows:
The invention adopts a mode of combining submerged cooling and jet cooling, solves the problem that the submerged cooling cannot effectively solve the problem of rapid heat dissipation in a local high heat flux area of the unit, and solves the problem that heat is wasted due to heat exchange between air jet cooling and air. The server is directly immersed in the cooling liquid, and the heating value of the server is absorbed by the flowing cooling liquid. And meanwhile, the jet cavity completely immersed in the cooling liquid sprays the cooling liquid to the surface of the server, so that a very strong heat exchange effect is realized around the impact point. The cooling liquid that sprays out mixes fully with the cooling liquid in the liquid freezer, can fully accelerate the disturbance of cooling liquid, lets the cooling liquid that keeps away from the server also can participate in the heat transfer, and then is favorable to the heat transfer between the cooling liquid, promotes the cooling liquid and carries thermal ability.
The jet cavity adopted by the invention is formed by superposing a buffer cavity, a rectifying net and a jet orifice plate. The buffer cavity can eliminate the initial velocity of the cooling liquid before entering the jet cavity, and weaken the phenomenon of uneven flow distribution among jet holes caused by flow resistance as much as possible. Then, the flowing direction of the cooling fluid flowing into the working medium can be adjusted through the rectifying net, so that the flow of each jet hole is basically and uniformly distributed, and a good jet unit structure is formed. The jet impact holes on the jet orifice plate are arranged in an array, a plurality of high-convection heat exchange areas are formed on the surface of the server, and the cooling effect is better.
The invention adopts the flow regulating valve to effectively reduce the whole energy consumption of the system. The flow regulating valve arranged at the tail end of each jet flow vertical pipe can regulate the flow entering the jet flow cavity according to the difference of the temperatures of the surfaces of the corresponding servers. The flow regulating valve arranged at the beginning end of the jet horizontal pipe can be closed under the working condition of winter, so that the whole device only adopts a submerged cooling mode. .
Drawings
FIG. 1 is a front view of the present invention;
Wherein: 1. a liquid cooling cabinet body; 1-1, the outer wall of a liquid cooling cabinet; 1-2, the inner wall of the liquid cooling cabinet; 1-3, a liquid inlet; 1-4, a liquid outlet; 2-a, a first jet cavity; 2-b, a second jet cavity; 2-c, a third jet cavity; 2-d, a fourth jet cavity; 2-e, a fifth jet cavity; 3-a, a first server; 3-b, a second server; 3-c, a third server; 3-d, a fourth server; 4-1-a, a first riser flow regulator valve; 4-1-b, a second riser flow control valve; 4-1-c, a third riser flow control valve; 4-1-d, a fourth riser flow control valve; 4-1-e, a fifth riser flow control valve; 4-2, a horizontal pipe flow regulating valve; 5-1, jet horizontal tube; 5-2-a, a first jet stack; 5-2-b, a second jet riser; 5-2-c, a third jet riser; 5-2-d, a fourth jet riser; 5-2-e, a fifth jet riser; 5-3, a three-way joint; 5-4, horizontal main pipe; 5-5, a reflux vertical pipe; 6. submersible pump; 7. a liquid pump; 8. a liquid storage tank; 9. a plate heat exchanger; 10. a circulation pump; 11. and a liquid cooling outdoor unit.
FIG. 2 is a bottom plan view of the present invention;
Wherein: 1-1, the outer wall of a liquid cooling cabinet; 1-2, the inner wall of the liquid cooling cabinet; 1-3, a liquid inlet; 4-2, a horizontal pipe flow regulating valve; 5-1, jet horizontal tube; 5-2-a, a first jet stack; 5-2-b, a second jet riser; 5-2-c, a third jet riser; 5-2-d, a fourth jet riser; 5-2-e, a fifth jet riser; 5-3, a three-way joint; 5-4, horizontal main pipe; 5-5, a reflux vertical pipe; 5-6, immersing the horizontal tube.
FIG. 3 is a schematic view of the jet cavity structure of the present invention;
wherein: 2-1, jet orifice plate; 2-2, a rectifying net; 2-3, a buffer cavity; 3. a server; 5-2, jet riser.
FIG. 4 is a schematic plan view of a jet orifice of the present invention;
Wherein: 2-1-1, jet impact hole.
Fig. 5 is a partial perspective view of the interior of the present invention.
Wherein: 2-1, jet orifice plates 2-2 and a rectifying net; 2-3, a buffer cavity; 3. a server; 5-2, jet riser.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The working process of winter working conditions is taken as an embodiment one:
as shown in fig. 1 and 2, an immersion jet cooling device for cooling a data center server is composed of a liquid cooling cabinet body 1, a cooling and heat dissipation device and a server 3.
The liquid cooling cabinet body 1 comprises a liquid cooling cabinet outer wall 1-1 and a liquid cooling cabinet inner wall 1-2, wherein a liquid inlet 1-3 and a liquid outlet 1-4 are sequentially formed in the liquid cooling cabinet outer wall 1-1 from bottom to top. The cooling heat dissipation device is a cooling liquid pipe section assembly 5, a cooling liquid horizontal main pipe 5-4 is connected with a liquid inlet 1-3 of the liquid refrigerator, and after the cooling liquid horizontal main pipe 5-4 passes through the outer wall 1-1 of the liquid refrigerator, the cooling liquid horizontal main pipe is divided into two branch pipes of a jet horizontal pipe 5-1 and an immersed horizontal pipe 5-6 through a three-way joint 5-3. The horizontal tube flow regulating valve 4-2 is arranged at the starting end of the jet horizontal tube 5-1. The bottom of the server 3 is placed on the inner wall 1-2 of the liquid cooling cabinet, the top-most height of the server 3 is lower than the bottom-most height of the liquid outlet 1-4, and the server 3 is parallel to the left and right side walls of the outer wall 1-1 of the liquid cooling cabinet. The first server 3-a, the second server 3-b, the third server 3-c and the fourth server 3-d are arranged from the near end to the far end of the liquid inlet 1-3 in sequence.
The cooling liquid passes through the liquid inlet 1-3 from the horizontal main pipe 5-4, and enters the incident horizontal pipe 5-1 and the immersed horizontal pipe 5-6 at the three-way joint 5-3 respectively. The cooling liquid enters the liquid cooling cabinet body 1 through the immersed horizontal pipe 5-6 to completely immerse the server 3, and the heating value of the server 3 is absorbed. The horizontal pipe flow regulating valve 4-2 arranged at the beginning end of the jet horizontal pipe 5-1 is closed, and the whole device only adopts a submerged cooling mode.
The cooling liquid with the temperature rising leaves from the liquid outlet 1-4 and returns to the inside of the liquid refrigerator body 1 through the liquid storage tank 8, the plate heat exchanger 9, the liquid pump 7 and the liquid inlet 1-3 respectively to form indoor heat exchange circulation. The cold source respectively passes through the plate heat exchanger 9, the liquid cooling outdoor unit 11 and the circulating pump 10 to form outdoor side heat exchange circulation for cooling the cooling liquid flowing through the plate heat exchanger 9.
The working process of summer working conditions is taken as an embodiment II:
As shown in fig. 1,2 and 5, the structure of the present embodiment is the same as that of the first embodiment, and the device in the first embodiment continues to operate, except that the horizontal tube flow regulating valve 4-2 provided at the start end of the horizontal tube 5-1 is opened, and the cooling and heat dissipating device increases the jet cavity 2.
The jet horizontal pipe 5-1 is communicated with the jet cavity 2 through the jet vertical pipe 5-2, and the bottom of the jet cavity 2 is arranged on the inner wall 1-2 of the liquid cooling cabinet. The relative positions of the jet cavity 2 and the server 3 are as follows from the near end to the far end of the liquid inlet 1-3: the first jet flow cavity 2-a, the first server 3-a, the second jet flow cavity 2-b, the second server 3-b, the third jet flow cavity 2-c, the third server 3-c, the fourth jet flow cavity 2-d, the fourth server 3-d and the fifth jet flow cavity 2-e are arranged in pairs at equal intervals, and the jet flow cavities 2 and the servers 3 are arranged in pairs at equal intervals.
The first, second, third and fifth riser flow regulating valves 4-1-a, 4-1-b, 4-1-c, 4-1-d and 4-1-e are respectively and correspondingly arranged at the ends of the first, second, third, fourth and fifth jet risers 5-2-a, 5-2-b, 5-2-c, 5-2-d and 5-2-e. The submerged pump 6 is fixed on the inner wall 1-2 of the liquid refrigerator, and the bottom is connected with the horizontal main pipe 5-4 through the reflux vertical pipe 5-5.
Part of cooling liquid enters the liquid cooling cabinet body 1 through the immersed horizontal pipe 5-6, and completely submerges the server 3 and the jet cavity 2; the other part of cooling liquid sequentially enters the jet cavity 2 through the jet horizontal pipe 5-1, the horizontal pipe flow regulating valve 4-2, the jet vertical pipe 5-2 and the vertical pipe flow regulating valve 4-1.
By adjusting the first riser flow regulating valve 4-1-a, the second riser flow regulating valve 4-1-b, the third riser flow regulating valve 4-1-c, the fourth riser flow regulating valve 4-1-d and the fifth riser flow regulating valve 4-1-e, the flow of the cooling liquid entering the first jet cavity 2-a, the second jet cavity 2-b, the third jet cavity 2-c, the fourth jet cavity 2-d and the fifth jet cavity 2-e can be respectively adjusted according to different surface temperatures of the corresponding server 3, so that the aim of reducing the whole energy consumption of the system is fulfilled.
The cooling liquid sprayed from the jet cavity 2 is mixed with the immersed cooling liquid, so that the disturbance of the cooling liquid can be sufficiently accelerated, and the cooling liquid far away from the server 3 can also participate in heat exchange. Part of the mixed cooling liquid leaves from the liquid outlet 1-4 and enters the indoor side for heat exchange circulation, and the other part enters the horizontal main pipe 5-4 from the reflux vertical pipe 5-5 through the submersible pump 6 to drive the cooling liquid to circularly move in the liquid cooling cabinet body 1, so that the flow and circulation of the cooling liquid are accelerated, and the heat dissipation effect is improved.
In this embodiment, the jet cavity 2 serves as an innovation point, so that the heat dissipation and cooling effects of the system are greatly improved, the structure of the jet cavity 2 is shown in fig. 3 and 4, and the structure of the jet cavity 2 is described in detail below with reference to the accompanying drawings.
The jet cavity 2 comprises a jet orifice plate 2-1, a rectifying net 2-2 and a buffer cavity 2-3. The jet impact holes 2-1-1 are distributed on the jet orifice plate 2-1 in a staggered array, and the cooling liquid sprayed out of all the jet impact holes 2-1-1 on the jet orifice plate 2-1 can cover the surface of the corresponding server 3.
In the jet flow cavity 2, the cooling liquid firstly enters the buffer cavity 2-3, so that the initial speed of the cooling liquid before entering the jet flow cavity 2 can be eliminated, and the phenomenon of uneven flow distribution among jet flow impact holes 2-1-1 caused by flow resistance can be weakened as much as possible. Then, the flowing direction of the cooling fluid flowing into the working medium can be adjusted through the rectifying net 2-2, so that the flow flowing into the jet orifice plate 2-1 is basically and uniformly distributed, and a good jet unit structure is formed. The processed cooling liquid is ejected from all jet impact holes 2-1-1 on the jet orifice plate 2-1 at high speed and directly impacts the surface of the corresponding server 3, so that heat dissipation is realized.
Claims (6)
1. A submerged jet cooling device for data center server heat dissipation, characterized by:
The liquid cooling cabinet consists of a liquid cooling cabinet body (1), a cooling and radiating device and a server (3);
The liquid cooling cabinet body (1) comprises a liquid cooling cabinet outer wall (1-1) and a liquid cooling cabinet inner wall (1-2), and cooling liquid is immersed in the liquid cooling cabinet body (1); the liquid cooling cabinet is characterized in that a liquid inlet (1-3) and a liquid outlet (1-4) are formed in the outer wall (1-1) of the liquid cooling cabinet, the liquid inlet (1-3) and the liquid outlet (1-4) are positioned on the same side of the outer wall (1-1) of the liquid cooling cabinet, and the position of the liquid outlet (1-4) is higher than that of the liquid inlet (1-3); the liquid cooling cabinet inner wall (1-2) is positioned above the liquid inlet (1-3), and a gap is reserved between the left end part of the liquid cooling cabinet inner wall (1-2) and the left side wall surface of the liquid cooling cabinet outer wall (1-1);
The cooling heat dissipation device comprises a cooling liquid pipe section assembly (5) and a jet flow cavity (2);
the cooling liquid horizontal main pipe (5-4) is connected with a liquid inlet (1-3) of the liquid refrigerator, and after passing through the outer wall (1-1) of the liquid refrigerator, the cooling liquid horizontal main pipe (5-4) is divided into two branch pipes of a jet flow horizontal pipe (5-1) and a submerged horizontal pipe (5-6) through a three-way joint (5-3); the jet flow horizontal pipe (5-1) is communicated with the jet flow cavity (2) through the jet flow vertical pipe (5-2), and the immersed horizontal pipe (5-6) is communicated with the liquid cooling cabinet body (1);
The bottom of the jet flow cavity (2) is arranged on the inner wall (1-2) of the liquid cooling cabinet, the top-most height of the jet flow cavity (2) is lower than the bottom-most height of the liquid outlet (1-4), and the jet flow cavity (2) is parallel to the left side wall and the right side wall of the outer wall (1-1) of the liquid cooling cabinet; the bottoms of the first jet flow cavity (2-a), the second jet flow cavity (2-b), the third jet flow cavity (2-c), the fourth jet flow cavity (2-d) and the fifth jet flow cavity (2-e) are correspondingly communicated with the first jet flow vertical pipe (5-2-a), the second jet flow vertical pipe (5-2-b), the third jet flow vertical pipe (5-2-c), the fourth jet flow vertical pipe (5-2-d) and the fifth jet flow vertical pipe (5-2-e) respectively, and the jet flow vertical pipe (5-2) penetrates through the inner wall (1-2) of the liquid refrigerator to be connected with the jet flow horizontal pipe (5-1);
The jet cavity (2) comprises a jet orifice plate (2-1), a rectifying net (2-2) and a buffer cavity (2-3); the rectifying net (2-2) is a stainless steel woven silk net with the same size as the buffer cavity (2-3); the buffer cavities (2-3), the rectifying nets (2-2) and the jet orifice plates (2-1) of the first jet cavity (2-a) and the fifth jet cavity (2-e) are arranged towards one side of the inside of the liquid cooling cabinet body (1), and the jet orifice plates (2-1) and the rectifying nets (2-2) of the second jet cavity (2-b), the third jet cavity (2-c) and the fourth jet cavity (2-d) are symmetrically arranged at two sides of the buffer cavity (2-3); the jet impact holes (2-1-1) are distributed on the jet orifice plate (2-1) in a staggered array, and cooling liquid sprayed out of all the jet impact holes (2-1-1) on the jet orifice plate (2-1) can cover the surface of a corresponding server (3);
The bottom of the server (3) is placed on the inner wall (1-2) of the liquid cooling cabinet, the server (3) is completely immersed in cooling liquid, and the first server (3-a), the second server (3-b), the third server (3-c) and the fourth server (3-d) are arranged at equal intervals.
2. The immersion-jet cooling apparatus for data center server heat dissipation as claimed in claim 1, wherein: the height of the server (3) is consistent with the height of the jet cavity (2); the relative positions of the jet cavity (2) and the server (3) are as follows from the near end to the far end of the liquid inlet (1-3): the device comprises a first jet flow cavity (2-a), a first server (3-a), a second jet flow cavity (2-b), a second server (3-b), a third jet flow cavity (2-c), a third server (3-c), a fourth jet flow cavity (2-d), a fourth server (3-d) and a fifth jet flow cavity (2-e), wherein the jet flow cavities (2) and the servers (3) are arranged in pairs at equal intervals.
3. The immersion-jet cooling apparatus for data center server heat dissipation as claimed in claim 1, wherein: the submerged pump (6) is fixed on the inner wall (1-2) of the liquid refrigerator, the bottom of the submerged pump (6) is connected with the reflux vertical pipe (5-5), and the reflux vertical pipe (5-5) penetrates through the inner wall (1-2) of the liquid refrigerator to be connected with the horizontal main pipe (5-4); the first riser flow regulating valve (4-1-a), the second riser flow regulating valve (4-1-b), the third riser flow regulating valve (4-1-c), the fourth riser flow regulating valve (4-1-d) and the fifth riser flow regulating valve (4-1-e) are respectively and correspondingly arranged at the tail ends of the first jet riser (5-2-a), the second jet riser (5-2-b), the third jet riser (5-2-c), the fourth jet riser (5-2-d) and the fifth jet riser (5-2-e); the horizontal pipe flow regulating valve (4-2) is arranged at the starting end of the jet horizontal pipe (5-1); the power lines of the submersible pump (6) and the flow regulating valve (4) penetrate out of the sealing holes of the outer wall (1-1) of the liquid cooling cabinet.
4. The immersion-jet cooling apparatus for data center server heat dissipation as claimed in claim 1, wherein: the indoor side heat exchange device comprises a liquid pump (7), a plate heat exchanger (9) and a liquid storage tank (8), wherein the liquid outlet (1-4) is communicated with the liquid storage tank (8) through a pipeline, the liquid storage tank (8) is communicated with a hot end inlet of the plate heat exchanger (9) through a pipeline, a hot end outlet of the plate heat exchanger (9) is communicated with the liquid pump (7) through a pipeline, and the liquid pump (7) is communicated with the liquid inlet (1-3) through a pipeline; the outdoor side heat exchange device comprises a liquid cooling outdoor unit (11), a circulating pump (10) and a plate heat exchanger (9), wherein the liquid cooling outdoor unit (11) is communicated with the circulating pump (10) through a pipeline, the circulating pump (10) is communicated with a cold end inlet of the plate heat exchanger (9) through a pipeline, and a cold end outlet of the plate heat exchanger (9) is communicated with the liquid cooling outdoor unit (11) through a pipeline.
5. A method of operating an immersion jet cooling device for data center server heat dissipation as claimed in claim 1, wherein:
The cooling liquid passes through the liquid inlet (1-3) from the horizontal main pipe (5-4), and enters the incident horizontal pipe (5-1) and the immersed horizontal pipe (5-6) at the three-way joint (5-3) respectively; a part of cooling liquid enters the liquid cooling cabinet body (1) through the immersed horizontal pipe (5-6) to completely immerse the server (3), and the heating value of the server (3) is absorbed; simultaneously, the other part of cooling liquid sequentially enters the jet cavity (2) through the jet horizontal pipe (5-1), the horizontal pipe flow regulating valve (4-2), the jet vertical pipe (5-2) and the vertical pipe flow regulating valve (4-1);
In the jet cavity (2), the cooling liquid firstly enters the buffer cavity (2-3) to eliminate the initial speed before entering the jet cavity (2), then the cooling liquid flows through the rectifying net (2-2) to be uniform, the treated cooling liquid is ejected out from all jet impact holes (2-1-1) on the jet orifice plate (2-1) at high speed and directly impacts the surface of the corresponding server (3) to realize heat dissipation;
after being mixed with immersed cooling liquid, one part of the cooling liquid leaves from a liquid outlet (1-4) and enters an indoor side for heat exchange circulation, and the other part enters a horizontal main pipe (5-4) from a reflux vertical pipe (5-5) through a submerged pump (6) to drive the cooling liquid to circularly move in the liquid cooling cabinet body (1);
The cooling liquid flowing out from the liquid outlet (1-4) respectively returns to the inside of the liquid refrigerator body (1) through the liquid storage tank (8), the plate heat exchanger (9), the liquid pump (7) and the liquid inlet (1-3), so as to form indoor heat exchange circulation; the cold source respectively passes through the plate heat exchanger (9), the liquid cooling outdoor unit (11) and the circulating pump (10) to form outdoor side heat exchange circulation for cooling the cooling liquid flowing through the plate heat exchanger (9).
6. A method of operating an immersion jet cooling apparatus for data center server heat dissipation as claimed in claim 5, wherein: controlling the flow of cooling liquid entering the first jet cavity (2-a), the second jet cavity (2-b), the third jet cavity (2-c), the fourth jet cavity (2-d) and the fifth jet cavity (2-e) in a one-to-one correspondence manner by adjusting the first riser flow regulating valve (4-1-a), the second riser flow regulating valve (4-1-b), the third riser flow regulating valve (4-1-c), the fourth riser flow regulating valve (4-1-d) and the fifth riser flow regulating valve (4-1-e); the flow rate of the cooling liquid entering the incident flow horizontal pipe (5-1) can be controlled by adjusting the flow rate regulating valve (4-2) of the horizontal pipe.
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| US20180103560A1 (en) * | 2016-10-12 | 2018-04-12 | Hamilton Sundstrand Corporation | Jet impingement immersion cooling with synthetic ejector |
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| US6108201A (en) * | 1999-02-22 | 2000-08-22 | Tilton; Charles L | Fluid control apparatus and method for spray cooling |
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