CN103486877B - The micro-channel flat coiled heat exchanger of variable-flow-path - Google Patents
The micro-channel flat coiled heat exchanger of variable-flow-path Download PDFInfo
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- CN103486877B CN103486877B CN201310436366.9A CN201310436366A CN103486877B CN 103486877 B CN103486877 B CN 103486877B CN 201310436366 A CN201310436366 A CN 201310436366A CN 103486877 B CN103486877 B CN 103486877B
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Abstract
A kind of micro-channel flat coiled heat exchanger of variable-flow-path of low temperature technical field of heat exchange, comprise: micro-channel flat, header, central tube, inlet tube and outlet, wherein: micro-channel flat is wound around central tube and arranges, and tracheae section is connected with outlet with inlet tube respectively with liquid pipeline section, micro-channel flat comprises some tributaries, the tributary quantity of liquid pipeline section is less than the tributary quantity of tracheae section, and the tributary on both sides is connected by header.The present invention changes stream by the quantity in the tributary that alter flows through, and then reduces fluid and flows through the cross-sectional area of pipeline from gas phase to institute liquid phase process, avoids the tracheae section pressure drop problem of liquid pipeline section heat transfer property difference greatly in same stream.
Description
Technical field
What the present invention relates to is a kind of device of low temperature technical field of heat exchange, specifically a kind of micro-channel flat coiled heat exchanger of variable-flow-path.
Background technology
Wrap-round tubular heat exchanger is the main cryogenic heat exchanger of first-selection of large-scale land natural gas liquefaction plant.According to statistics, the large-scale land natural gas liquefaction plant of 90% have employed wrap-round tubular heat exchanger.Wrap-round tubular heat exchanger is entwined from level to level around central tube by multiple pipe.The medium of Flow In A Circular Tube and the interior medium flowed of cavity carry out heat exchange.Described by this wrap-round tubular heat exchanger has in following open file: Hausen/Linde, " cryogenic technique " (second edition in 1985,471-475 page);-Gu Anzhong, " LNG Technology handbook " (first edition in 2012,484-485 page).In file disclosed in these, coiled heat exchanger main flow be the calibers such as employing around pipe.Natural gas is when Bottomhole pressure, and fluid is progressively condensed into subcooled liquid from gaseous state inside Tube Sheet of Heat Exchanger, make flow velocity from section is larger then declines gradually.Because large flow velocity correspond to large pressure drop and large heat transfer coefficient, therefore to there is the pressure drop of inlet gas pipeline section bigger than normal and go out the problem of oral fluid pipeline section heat transfer property deviation for this coiled heat exchanger.
Through finding the retrieval of prior art, Chinese patent literature CN101233378, publication date 2008-07-30, describe a kind of coiled heat exchanger, it has multiple pipe around a core pipe winding and has a shell, this shell formation one is around the border of the exocoel of these pipes, and wherein the pipe of the first pipe group has the first internal diameter and the first external diameter, and the pipe of the second pipe group has the second internal diameter and the second external diameter.This second internal diameter is different from the first internal diameter and/or this second external diameter is different with the second external diameter.But the prior art does not solve the bigger than normal and problem of outlet section heat transfer property deviation of inducer pressure drop in same stream; Become caliber even if adopt in same stream, because the excursion of caliber is limited, effectively can not solve the bigger than normal and problem of outlet section heat transfer property deviation of inducer pressure drop in same flow road.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of micro-channel flat coiled heat exchanger of variable-flow-path is provided, make fluid from gas phase to liquid phase process flow through pipeline cross-sectional area reduce, both reduce the flow resistance of gas in tube segment, in turn enhance the heat transfer effect of liquid in later stage liquid pipeline section.
The present invention is achieved by the following technical solutions, the present invention includes: micro-channel flat, header, central tube, inlet tube and outlet, wherein: micro-channel flat is wound around central tube and arranges, and tracheae section is connected with outlet with inlet tube respectively with liquid pipeline section, micro-channel flat comprises some tributaries, the tributary quantity of liquid pipeline section is less than the tributary quantity of tracheae section, the tributary on both sides is connected by header, the quantity in the tributary flowed through by alter changes stream, then reduce fluid from gas phase to liquid phase process flow through the cross-sectional area of pipeline, avoid tracheae section pressure drop in same stream large and the problem of liquid pipeline section heat transfer property difference.
Described header is closed pipe, two ends, side have the interface slot corresponding with tributary, both sides, the tributary on both sides is connected with header inside, middle part cross-section is vertically provided with homogenizing plate, this homogenizing plate evenly has some apertures, and the aperture of the fluid in the tributary of tracheae section on homogenizing plate flows in the tributary of liquid pipeline section.
The pipe diameter of described header is 5mm ~ 500mm.
The hole diameter of described homogenizing plate is 0.1mm ~ 3.0mm.
The tributary of the liquid pipeline section of described micro-channel flat is different from a flow structure of tracheae section, specifically refers to: flow structure difference is propped up in the microchannel of the gentle pipeline section of liquid pipeline section, and the spacing between the lead angle in the tributary on both sides and each tributary is different.Adjustable screw lift angle and spacing make the layout in tributary compacter as required.
The vertical direction of described micro-channel flat is provided with support, and each tributary separates fixing by this support.
The outside of described micro-channel flat is provided with housing.
The quantity of described micro-channel flat is more than 2 layers, and each layer is from central tube stacked coiling from inside to outside.
The diameter in each tributary of described micro-channel flat is 0.1mm ~ 5.0mm.
The present invention replaces traditional pipe by micro-channel flat, and changes stream by the number arranging the micro-channel flat that header alter flows through.Therefore can by fluid from gas phase to liquid phase process flow through pipeline cross-sectional area reduce, both reduced the flow resistance of gas in tube segment, in turn enhanced the heat transfer effect of liquid in later stage liquid pipeline section.In addition, the micro-channel flat number, the structure of micro-channel flat, the lead angle of flat tube winding and the flat tube spacing that are connected can be adjusted by header, avoid and become large problem because micro-channel tubes number changes the tube pitch brought, make heat exchanger structure compacter.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of header.
Detailed description of the invention
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As shown in Figure 1, the present embodiment comprises: micro-channel flat 1, header 2, central tube 4, inlet tube 7 and outlet 8, wherein: micro-channel flat 1 is wound around central tube 4 and arranges, and tracheae section is connected with outlet 8 with inlet tube 7 respectively with liquid pipeline section, micro-channel flat 1 comprises some tributaries, the tributary quantity of liquid pipeline section is less than the tributary quantity of tracheae section, the tributary on both sides is connected by header 2, the quantity in the tributary flowed through by alter changes stream, then reduce fluid from gas phase to liquid phase process flow through the cross-sectional area of pipeline, avoid tracheae section pressure drop in same stream large and the problem of liquid pipeline section heat transfer property difference.
As shown in Figure 2, described header 2 is the pipe closed, two ends, side have the interface slot corresponding with tributary, both sides, the tributary on both sides is connected with header 2 inside, middle part cross-section is vertically provided with homogenizing plate 3, this homogenizing plate 3 evenly has some apertures, and the aperture of the fluid in the tributary of tracheae section on homogenizing plate 3 flows in the tributary of liquid pipeline section.
The pipe diameter of described header 2 is 5mm ~ 500mm.
The hole diameter of described homogenizing plate 3 is 0.1mm ~ 3.0mm.
The tributary of the liquid pipeline section of described micro-channel flat 1 is different from a flow structure of tracheae section, specifically refers to: flow structure difference is propped up in the microchannel of the gentle pipeline section of liquid pipeline section, the lead angle α 1 in the tributary on both sides, spacing L1, the L2 difference between α 2 and each tributary.Adjustable screw lift angle and spacing make the layout in tributary compacter as required.
The vertical direction of described micro-channel flat 1 is provided with support 5, and each tributary separates fixing by this support 5.
The outside of described micro-channel flat is provided with housing 6.
The diameter in each tributary of described micro-channel flat 1 is 0.1mm ~ 5.0mm.
The quantity of described micro-channel flat 1 is more than 2 layers, and each layer is from central tube 4 stacked coiling from inside to outside.
During the heat exchanger applications of the present embodiment, every fluid streams can be redistributed fluid by the effect of header 2 and homogenizing plate 3 in each stream, realizes the variable-flow-path of every fluid streams.Inside pipe, medium flows in every layer of micro-channel flat 1 from housing 6 bottom inlet pipe 7; When fluid flows through header 2, medium first flow in header 2 cavity from micro-channel flat 1 and mixes, and mixed medium carries out uniform distribution by the aperture of homogenizing plate 3, then enters in the micro-channel flat 1 of next varying number and structure respectively; Finally flow out from the outlet 8 at housing 6 top.Shell-side medium enters in shell chamber from housing 6 top, flows down along micro-channel flat 1 outer wall falling liquid film, carries out heat exchange, finally flow out from housing 6 bottom by side flow in micro-channel flat 1 wall and pipe.
Claims (9)
1. the micro-channel flat coiled heat exchanger of a variable-flow-path, it is characterized in that, comprise: micro-channel flat, header, central tube, inlet tube and outlet, wherein: micro-channel flat is wound around central tube and arranges, and tracheae section is connected with outlet with inlet tube respectively with liquid pipeline section, micro-channel flat comprises some tributaries, the tributary quantity of liquid pipeline section is less than the tributary quantity of tracheae section, tracheae section is connected by header on header both sides respectively with the tributary of liquid pipeline section, the quantity in the tributary flowed through by alter changes stream, then reduce fluid from gas phase to liquid phase process flow through the cross-sectional area of pipeline.
2. heat exchanger according to claim 1, it is characterized in that, described header is closed pipe, two ends, side have the interface slot corresponding with the tributary of the tracheae section and liquid pipeline section that are arranged on header both sides, the tributary of the tracheae section and liquid pipeline section being arranged on header both sides is connected with header inside, middle part cross-section is vertically provided with homogenizing plate, this homogenizing plate evenly has some apertures, and the aperture of the fluid in the tributary of tracheae section on homogenizing plate flows in the tributary of liquid pipeline section.
3. heat exchanger according to claim 2, is characterized in that, described pipe diameter is 5mm ~ 500mm.
4. heat exchanger according to claim 2, is characterized in that, the hole diameter of described homogenizing plate is 0.1mm ~ 3.0mm.
5. heat exchanger according to claim 1 and 2, is characterized in that, flow structure difference is propped up in the microchannel of the described gentle pipeline section of liquid pipeline section, and the spacing between the lead angle in the tracheae section on header both sides and the tributary of liquid pipeline section and each tributary is different.
6. heat exchanger according to claim 5, is characterized in that, the vertical direction of described micro-channel flat is provided with support, and each tributary separates fixing by this support.
7. heat exchanger according to claim 5, is characterized in that, the outside of described micro-channel flat is provided with housing.
8. heat exchanger according to claim 5, is characterized in that, the quantity of described micro-channel flat is more than 2 layers, and each layer is from central tube stacked coiling from inside to outside.
9. heat exchanger according to claim 5, is characterized in that, the diameter in each tributary of described micro-channel flat is 0.1mm ~ 5.0mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310436366.9A CN103486877B (en) | 2013-09-23 | 2013-09-23 | The micro-channel flat coiled heat exchanger of variable-flow-path |
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| CN201310436366.9A CN103486877B (en) | 2013-09-23 | 2013-09-23 | The micro-channel flat coiled heat exchanger of variable-flow-path |
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| CN103486877B true CN103486877B (en) | 2015-11-04 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106440527B (en) * | 2016-11-04 | 2022-03-15 | 上海科凌能源科技有限公司 | Fin-free micro-channel heat exchanger |
| WO2020074117A1 (en) * | 2018-10-09 | 2020-04-16 | Linde Aktiengesellschaft | Wound heat exchanger, method for producing a wound heat exchanger and method for exchanging heat between a first fluid and a second fluid |
| CN109604367B (en) * | 2018-12-24 | 2021-02-12 | 上海交通大学 | Roll bending forming device and method for variable-thickness folding type micro-channel flat tube |
| CN112833685A (en) * | 2021-01-05 | 2021-05-25 | 清华大学 | Spiral winding pipe air-oil heat exchanger suitable for aeroengine |
| CN114653411A (en) * | 2022-03-04 | 2022-06-24 | 广东省科学院生物与医学工程研究所 | Three-dimensional spiral chip |
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| US3435627A (en) * | 1966-12-28 | 1969-04-01 | Temprite Products Corp | Heat exchange system |
| US4451960A (en) * | 1979-03-15 | 1984-06-05 | Molitor Industries, Inc. | Method of producing multiple coil, multiple tube heat exchanger |
| CN201368590Y (en) * | 2009-02-09 | 2009-12-23 | 浙江康盛股份有限公司 | Heat pump water heater of a heat exchanger which adopts micro-channels |
| CN102022933A (en) * | 2010-12-16 | 2011-04-20 | 中国扬子集团滁州扬子空调器有限公司 | Wound pipe heat exchanger |
| CN102455139A (en) * | 2011-10-18 | 2012-05-16 | 张周卫 | Double-strand-flow low-temperature spiral winding pipe type heat exchanger with vacuum heat insulation function |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003254684A (en) * | 2002-03-04 | 2003-09-10 | Atago Seisakusho:Kk | Heat exchanger |
| JP2010112596A (en) * | 2008-11-05 | 2010-05-20 | Sanden Corp | Heat exchanger and hot water supply device using the same |
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- 2013-09-23 CN CN201310436366.9A patent/CN103486877B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3435627A (en) * | 1966-12-28 | 1969-04-01 | Temprite Products Corp | Heat exchange system |
| US4451960A (en) * | 1979-03-15 | 1984-06-05 | Molitor Industries, Inc. | Method of producing multiple coil, multiple tube heat exchanger |
| CN201368590Y (en) * | 2009-02-09 | 2009-12-23 | 浙江康盛股份有限公司 | Heat pump water heater of a heat exchanger which adopts micro-channels |
| CN102022933A (en) * | 2010-12-16 | 2011-04-20 | 中国扬子集团滁州扬子空调器有限公司 | Wound pipe heat exchanger |
| CN102455139A (en) * | 2011-10-18 | 2012-05-16 | 张周卫 | Double-strand-flow low-temperature spiral winding pipe type heat exchanger with vacuum heat insulation function |
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Effective date of registration: 20190307 Address after: 212300 Zhenjiang City, Jiangsu Province, Danyang City, Danbei Town Village Patentee after: Jiangsu Wealvield Water Heater Co., Ltd. Address before: 200240 No. 800, Dongchuan Road, Shanghai, Minhang District Patentee before: Shanghai Jiao Tong University |
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