CN103335549A - Phase separation micro-channel condenser - Google Patents
Phase separation micro-channel condenser Download PDFInfo
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- CN103335549A CN103335549A CN2013102906088A CN201310290608A CN103335549A CN 103335549 A CN103335549 A CN 103335549A CN 2013102906088 A CN2013102906088 A CN 2013102906088A CN 201310290608 A CN201310290608 A CN 201310290608A CN 103335549 A CN103335549 A CN 103335549A
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Abstract
The invention discloses a phase separation micro-channel condenser and belongs to the field of the heat transfer enhancement technology. A plurality of parallel micro-channels are etched on a silicon substrate and are separated by rib sheets. A plurality of rib strips are etched in the downstream area of each micro-channel. The rib strips of each micro-channel form, in an enclosing mode, a rib strip net with an opening toward the downstream. A cover plate packages on the micro-channels. The phase separation micro-channel condenser overcomes the defect that a traditional micro-channel condenser can not modulate a two phase flow pattern. Different from other reinforcing condensing heat conduction devices, due to the fact that an air phase and a liquid phase flow in branch paths after flow pattern modulation, the phase separation micro-channel condenser can greatly reduce the thickness of a liquid film, improve condensing heat exchange performance, reduce flow resistance and flow instability, and be applied to an electronic element heat-sink cooling system.
Description
Technical field
The invention belongs to the enhanced heat exchange technical field, particularly a kind of micro-channel condenser that is separated.Be the enhanced heat exchange device for the cooling electronic component cooling system specifically.
Background technology
In recent years, the electronic industry fast development, the integrated level of electronic circuit significantly improves, and caloric value constantly increases, and people press for development towards the cooling electronic component cooling system of high heat flux.
In the condensation process in the microchannel, the vapour-liquid two-phase mainly exists annular flow, slug flow and bubble flow equal flow type.The vapour-liquid two-phase presents the ring-type flow pattern in microchannel import department, and the condensing heat-exchange performance is good; Along with the carrying out of condensation, flow pattern progressively changes slug flow into by annular flow, and then changes bubble flow into and since liquid film thicken appearance with the liquid bridge, the condensing heat-exchange performance runs down.Draw the inner link that has certainty between condensation flow pattern and the heat transfer by above analysis.The measure of enforcing condensation heat exchange is exactly: keep condensation process initial segment high heat-transfer performance flow pattern-ring-type flow pattern; Regulation and control downstream low heat transfer flow pattern-slug flow and bubble flow are realized the collaborative of flow pattern and heat transfer, finally reach the purpose of enforcing condensation heat exchange.Common traditional micro-channel condenser can't be regulated and control the two-phase flow pattern, in order to improve the thermal efficiency of this system, reduces its volume simultaneously, is badly in need of micro-channel evaporator and condenser that exploitation has high heat-exchanging performance.In order to overcome the micro-channel condenser that efficiently is separated that the present invention of this shortcoming has developed a kind of adjustable two-phase flow pattern.
Summary of the invention
The objective of the invention is to propose a kind of micro-channel condenser that efficiently is separated, it is characterized in that, the described micro-channel condenser that is separated is a kind of micro-channel condenser that the stream-liquid two-phase flow type is regulated and control, and has enhanced heat exchange and the function that reduces flow resistance; The described micro-channel condenser that is separated is to etch many parallel microchannels 1.1 at silicon chip 1, is separated by fin 2 between the microchannel; In the downstream area 5 of microchannel, etch a large amount of rib 3, and surround opening towards the wide rib mesh of the 100 μ m in downstream; The top, microchannel is by cover plate 4 encapsulation.
The width of described every microchannel is 200 μ m, and the degree of depth is 100 μ m.
Described every rib diameter is 10 μ m, and rib heights is 100 μ m, and the space is 10 μ m between the rib.
Described silicon chip is bottom, microchannel radiating surface, and integrates with water cooling equipment.
Described rib mesh has been divided into two zones with the microchannel streamwise, and the zone that front end does not arrange rib mesh is the light pipe zone, is used for the ring-type flow pattern, and the zone that the rear end arranges rib mesh is flow pattern regulation and control zones, is used for regulation and control slug flow type.
The step that the described micro-channel condenser that is separated is regulated and control the stream-liquid two-phase flow type comprises:
1) at first steam enters the light pipe zone of front end, forms the ring-type flow pattern, and along with the carrying out of condensation, the ring-type flow pattern gradates and is vapour slug flow type; Because capillary effect, the vapour bullet can't pass the mesh of rib mesh, so rib mesh has the effect of logical liquid resistance vapour, thereby has the flow pattern adjusting function;
Can't pass rib mesh when 2) the vapour bullet is through flow pattern regulation and control zone, be forced into the vapour phase path between rib mesh and the fin, and liquid can pass rib mesh, enter the liquid phase path that rib mesh is surrounded, the vapour-liquid two-phase flows along separate routes; One side is the reducer film thickness significantly, improves the condensing heat-exchange performance; The unstability that reduces flow resistance on the other hand and flow.
The invention has the beneficial effects as follows that can overcome traditional micro-channel condenser can't regulate and control this shortcoming of two-phase flow pattern.Different with other enforcing condensation heat transfer, after the present invention regulated and control through flow pattern, liquid and vapor capacity flowed along separate routes, and one side is the reducer film thickness significantly, improves the condensing heat-exchange performance; The unstability that can reduce flow resistance on the other hand and flow is used for the cooling electronic component cooling system.
Description of drawings
Fig. 1 is the external structure schematic diagram of the micro-channel condenser that is separated of the present invention;
Fig. 2 is the internal structure schematic diagram of Fig. 1;
Fig. 3 is the A-A cutaway view of Fig. 1;
Fig. 4 is the B-B cutaway view of Fig. 3;
Fig. 5 is the slug flow type figure in the common microchannel;
Fig. 6 is separated in the microchannel through the flow pattern after the rib mesh regulation and control.
The specific embodiment
The present invention proposes a kind of micro-channel condenser that efficiently is separated.The described micro-channel condenser that is separated is a kind of micro-channel condenser that the stream-liquid two-phase flow type is regulated and control, and has enhanced heat exchange and the function that reduces flow resistance; Further specified below in conjunction with drawings and Examples.
Embodiment
Fig. 1, Figure 2 shows that the structural representation of the micro-channel condenser that is separated of the present invention.The micro-channel condenser that is separated shown in the figure is to etch many parallel microchannels 1.1 at silicon chip 1, is separated by fin 2 between the microchannel; In the downstream area 5 of microchannel, etch a large amount of rib 3, and surround opening towards the rib mesh in downstream; The top, microchannel is by cover plate 4 encapsulation; Be separated micro-channel condenser external structure as shown in Figure 1, internal structure such as Fig. 2, Fig. 3 and shown in Figure 4.This micro-channel condenser that is separated at first processes many parallel microchannels 1.1 by etch process at semiconductor silicon substrate 1, and silicon chip 1 is bottom, microchannel radiating surface.The width of every microchannel is 200 μ m, and the degree of depth is 100 μ m; Downstream area 5 in the microchannel etches a large amount of rib 3 then, and every rib diameter is 10 μ m, and rib heights is 100 μ m, and the space is 10 μ m between the rib, and surrounds opening towards the wide rib mesh of the 100 μ m in downstream; Adopt the high-voltage electrostatic field bonding techniques that cover plate 4 is encapsulated in 1.1 tops, microchannel at last, namely finish the making of the micro-channel condenser that originally is separated.
Fig. 5 has shown the slug flow type in the common microchannel.After these slug flow type process rib mesh regulation and control, liquid and vapor capacity flows along separate routes, and the vapour phase path of gas between rib mesh and fin flows, the liquid phase path mobile (shown in Figure 6 as shown) that liquid surrounds in rib mesh.The vapour-liquid two-phase flows along separate routes, and one side is the reducer film thickness significantly, improves the condensing heat-exchange performance; The unstability that can reduce flow resistance on the other hand and flow.The micro-channel condenser that is separated needs to integrate use by bottom radiating surface and other water cooling equipment.
Claims (6)
1. the micro-channel condenser that is separated is characterized in that, the described micro-channel condenser that is separated is a kind of micro-channel condenser that the stream-liquid two-phase flow type is regulated and control, and has enhanced heat exchange and the function that reduces flow resistance; The described micro-channel condenser that is separated is to etch many parallel microchannels (1.1) at silicon chip (1), is separated by fin (2) between the microchannel; In the downstream area (5) of microchannel, etch a large amount of rib (3), and surround opening towards the wide rib mesh of the 100 μ m in downstream; The top, microchannel is encapsulated by cover plate (4).
2. a kind of micro-channel condenser that is separated according to claim 1 is characterized in that, the width of described every microchannel is 200 μ m, and the degree of depth is 100 μ m.
3. a kind of micro-channel condenser that is separated according to claim 1 is characterized in that, described every rib diameter is 10 μ m, and rib heights is 100 μ m, and the space is 10 μ m between the rib.
4. a kind of micro-channel condenser that is separated according to claim 1 is characterized in that, described silicon chip is bottom, microchannel radiating surface, and integrates with water cooling equipment.
5. a kind of micro-channel condenser that is separated according to claim 1, it is characterized in that, described rib mesh has been divided into two zones with the microchannel streamwise, the zone that front end does not arrange rib mesh is the light pipe zone, be used for the ring-type flow pattern, the zone that the rear end arranges rib mesh is flow pattern regulation and control zones, is used for regulation and control slug flow type.
6. method that the described a kind of micro-channel condenser that is separated of claim 1 is regulated and control the stream-liquid two-phase flow type is characterized in that the step that the described micro-channel condenser that is separated is regulated and control the stream-liquid two-phase flow type comprises:
1) at first steam enters the light pipe zone of front end, forms the ring-type flow pattern, and along with the carrying out of condensation, the ring-type flow pattern gradates and is vapour slug flow type; Because capillary effect, the vapour bullet can't pass the mesh of rib mesh, so rib mesh has the effect of logical liquid resistance vapour, thereby has the flow pattern adjusting function;
Can't pass rib mesh when 2) the vapour bullet is through flow pattern regulation and control zone, be forced into the vapour phase path between rib mesh and the fin, and liquid can pass rib mesh, enter the liquid phase path that rib mesh is surrounded, the vapour-liquid two-phase flows along separate routes; One side is the reducer film thickness significantly, improves the condensing heat-exchange performance; The unstability that reduces flow resistance on the other hand and flow.
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| CN104028050A (en) * | 2014-06-06 | 2014-09-10 | 华北电力大学 | Automatic micro-scaled gas-liquid phase separator |
| CN104154787A (en) * | 2014-08-29 | 2014-11-19 | 电子科技大学 | Multi-stage evaporation micro-channel heat pipe heat transferring and radiating device |
| CN105865089A (en) * | 2016-04-19 | 2016-08-17 | 华北电力大学 | Pin-fin wall surface micro-channel heat exchanger |
| CN107894179A (en) * | 2017-11-13 | 2018-04-10 | 中国科学院空间应用工程与技术中心 | Free hot and cold side gravity micro heat pipe and its method of work |
| CN108461460A (en) * | 2017-12-15 | 2018-08-28 | 天津津航计算技术研究所 | A kind of two-phase laminated flow micro-channel heat sink |
| CN109000488A (en) * | 2017-09-14 | 2018-12-14 | 华北电力大学 | A kind of dot matrix heat exchanger |
| CN109671688A (en) * | 2017-10-16 | 2019-04-23 | 中车株洲电力机车研究所有限公司 | A kind of refrigerant phase transformation cold plate |
| CN109758786A (en) * | 2018-12-29 | 2019-05-17 | 四川大学 | It is a kind of to form the micro-channel device for stablizing annular flow |
| US11252847B2 (en) | 2017-06-30 | 2022-02-15 | General Electric Company | Heat dissipation system and an associated method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028050B (en) * | 2014-06-06 | 2016-02-24 | 华北电力大学 | Self-action minute yardstick gas-liquid phase separator |
| CN104028050A (en) * | 2014-06-06 | 2014-09-10 | 华北电力大学 | Automatic micro-scaled gas-liquid phase separator |
| CN104154787A (en) * | 2014-08-29 | 2014-11-19 | 电子科技大学 | Multi-stage evaporation micro-channel heat pipe heat transferring and radiating device |
| CN105865089A (en) * | 2016-04-19 | 2016-08-17 | 华北电力大学 | Pin-fin wall surface micro-channel heat exchanger |
| CN105865089B (en) * | 2016-04-19 | 2018-05-25 | 华北电力大学 | A kind of pin rib wall surface micro-channel heat exchanger |
| US11252847B2 (en) | 2017-06-30 | 2022-02-15 | General Electric Company | Heat dissipation system and an associated method thereof |
| US11997839B2 (en) | 2017-06-30 | 2024-05-28 | Ge Grid Solutions Llc | Heat dissipation system and an associated method thereof |
| CN109000488A (en) * | 2017-09-14 | 2018-12-14 | 华北电力大学 | A kind of dot matrix heat exchanger |
| CN109000488B (en) * | 2017-09-14 | 2024-05-28 | 华北电力大学 | Dot matrix heat exchanger |
| CN109671688A (en) * | 2017-10-16 | 2019-04-23 | 中车株洲电力机车研究所有限公司 | A kind of refrigerant phase transformation cold plate |
| CN109671688B (en) * | 2017-10-16 | 2020-08-28 | 中车株洲电力机车研究所有限公司 | Refrigerant phase change cold plate |
| CN107894179A (en) * | 2017-11-13 | 2018-04-10 | 中国科学院空间应用工程与技术中心 | Free hot and cold side gravity micro heat pipe and its method of work |
| CN108461460A (en) * | 2017-12-15 | 2018-08-28 | 天津津航计算技术研究所 | A kind of two-phase laminated flow micro-channel heat sink |
| CN108461460B (en) * | 2017-12-15 | 2020-02-21 | 天津津航计算技术研究所 | Two-phase separation microchannel heat sink |
| CN109758786A (en) * | 2018-12-29 | 2019-05-17 | 四川大学 | It is a kind of to form the micro-channel device for stablizing annular flow |
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| CN103335549B (en) | 2015-06-10 |
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