WO2013081249A1 - 웨이브 핀 - Google Patents
웨이브 핀 Download PDFInfo
- Publication number
- WO2013081249A1 WO2013081249A1 PCT/KR2012/001208 KR2012001208W WO2013081249A1 WO 2013081249 A1 WO2013081249 A1 WO 2013081249A1 KR 2012001208 W KR2012001208 W KR 2012001208W WO 2013081249 A1 WO2013081249 A1 WO 2013081249A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- main waveform
- bends
- wave
- width direction
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
Definitions
- the present invention relates to a wave fin embedded in the heat exchange case of the heat exchanger to induce turbulence of the fluid through direct contact with the fluid, and more particularly, by greatly increasing the turbulence energy of the fluid upon contact with the fluid. It relates to a wave fin that can effectively implement the turbulence of the fluid and improve the heat exchange efficiency of the fluid.
- heat exchangers such as vehicle exhaust gas recirculation EGR cooler, exhaust gas cooler, fuel cooler, oil cooler, intercooler, superheater and boiler of waste heat recovery system, and these heat exchangers are gas-gas, liquid-gas, liquid -To heat exchange various fluids such as liquids and the like.
- exhaust gas recirculation is designed to extract a portion of the exhaust gas from the exhaust system of a diesel engine and return it to the intake of the engine and add it to the mixer, thereby suppressing the generation of NOx (nitrogen oxide),
- Purification of exhaust gas of diesel engines in that the reduction of heat loss of the cooling liquid due to the reduction of the loss and the temperature of the combustion gas, the increase of the specific heat ratio due to the change in the amount and composition of the working gas, and the improvement of the cycle efficiency can be obtained. And it is widely used as an effective method for improving the thermal efficiency.
- such a heat exchanger has a predetermined heat exchange case through which the fluid for heat exchange passes, and in this heat exchange case, a fin structure capable of improving the heat exchange efficiency of the fluid by inducing turbulence of the fluid is provided.
- Such fin structures have various forms such as corrugated structures, flat plate structures, wave structures, etc., and in recent years, wave fins have been widely used in terms of improving heat exchange efficiency by promoting turbulence of fluids.
- the wave fin has a structure in which a plurality of peaks and a plurality of valleys are continuously connected in the width direction thereof, and the wave fins have a structure in which a plurality of peaks and a plurality of valleys are waved along the length direction, that is, the flow direction of the fluid.
- a plurality of fluid passages are defined within the compartment. Accordingly, the fluid passing through the fluid passage of the wave fins flows in the wave direction through the wavy structure to induce turbulence and agitation of the fluid.
- the present invention has been made in view of the above, and by further inducing turbulence to vortex flow in the main wave flow direction of the fluid to significantly increase the turbulence energy of the fluid to promote turbulence of the fluid and heat exchange efficiency of the fluid
- the goal is to provide a wave pin that can effectively implement the enhancement.
- a plurality of mountains and a plurality of valleys are connected to each other in the width direction by a plurality of side walls, and the plurality of side walls are formed by partitioning a plurality of fluid passages through which fluid passes.
- the plurality of mountains, the plurality of valleys, and the plurality of sidewalls form a main waveform extending in a longitudinal direction with a first curvature radius.
- At least one bent part is formed in the middle of the main waveform of the side wall part, and the bent part is connected to the middle of the main waveform to bend at a second radius of curvature.
- the second radius of curvature is characterized in that it is formed smaller than the first radius of curvature.
- the curved portions are formed at positions symmetrical with respect to each vertex center line of the main waveform, so that a plurality of curved portions are formed in the middle of the main waveform.
- the plurality of bends may include a plurality of first bends protruding in a first width direction from the main waveform and a plurality of second bends protruding in a second width direction from the main wave line, and the first bends and the second bends.
- the bent portion is formed at a symmetrical position with respect to each pitch center of the main waveform.
- the plurality of bends may be formed to protrude in any one width direction from the first and second width directions in the main waveform.
- the vertex centerline of the first and second bent portions may be inclined with respect to the vertex centerline of the main waveform.
- the portion where the peak and the side wall portion are connected is formed to correspond to the curved portion, and the portion where the valley and the side wall portion are connected is formed to correspond to the curved portion.
- the ratio between the width direction pitch (P) and the second curvature radius (r) of the wave fin is characterized in that 0.1 to 0.6.
- the fluid passage is characterized by consisting of any one of a rectangular, trapezoidal, round cross-sectional structure.
- the turbulence of the fluid is accelerated through the bent portion formed in the side wall, so that the turbulent kinetic energy of the fluid is greatly increased, thereby improving the heat exchange efficiency of the fluid.
- FIG. 1 is a perspective view showing a wave fin according to an embodiment of the present invention.
- FIG. 2 is an enlarged view illustrating an enlarged portion A of FIG. 1;
- FIG. 3 is a plan view illustrating a wave fin according to an embodiment of the present invention.
- FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3.
- FIG. 5 is an enlarged view illustrating an enlarged portion C of FIG. 4.
- FIG. 6 is a plan sectional view taken along the line D-D of FIG. 5.
- FIG. 7 is a diagram illustrating a first modified embodiment of FIG. 6.
- FIG. 8 is a diagram illustrating a second modified embodiment of FIG. 6.
- FIG. 9 illustrates a third modified embodiment of FIG. 6.
- FIG. 10 is a graph showing the mean turbulent kinetic energy when a fluid passes through a wave fin according to the present invention.
- 1 to 6 are diagrams illustrating wave fins according to an embodiment of the present invention.
- the wave fin 10 according to the present invention is a plurality of peaks 11 and a plurality of valleys 12 are continuously connected at a predetermined interval along the width direction (W1, W2) of the wave fin 10
- the plurality of peaks 11 and the plurality of valleys 12 are connected to each other in the width direction by the plurality of side wall portions 13, respectively.
- the wave fin 10 has a plurality of fluid passages 15 partitioned by a plurality of side wall portions 13, and each fluid passage 15 is formed by a plurality of peaks 11 and a plurality of valleys 12. The upper and lower ends are each closed alternately.
- the fluid passage 15 may form a trapezoidal cross-sectional structure as the sidewall portions 13 facing each other are formed to be inclined symmetrically with each other.
- the fluid passage 15 may be made of various cross-sectional structures, such as trapezoidal and round cross-sectional structures.
- the plurality of peaks 11, the plurality of valleys 12, and the plurality of side wall portions 13 extend corrugated with the first curvature radius R along the longitudinal direction, and thus, as shown in FIG. Accordingly, a main waveform Wm is formed.
- This main waveform Wm is formed in a certain waveform direction (see arrow W in FIG. 6) including the virtual connection line (see Wv in FIG. 6).
- one or more bends 21 and 22 may be formed in the middle of the main waveform Wm, and the bent portions 21 and 22 may be bent in the second radius of curvature r to be connected in the middle of the main waveform Wm.
- the plurality of bent portions 21 and 22 serve as the uneven portion on the surface of the main waveform Wm, and the fluid is the main waveform. Turbulence and vortexization may be generated in the bends 21 and 22 when flowing along the wave direction W at the surface of Wm.
- the bends 21 and 22 may be formed at positions symmetrical with respect to each vertex center line Cp of the main waveform Wm, and thus, the bends 21 and 22 may be formed in the middle of the main waveform Wm. ) May be formed.
- the plurality of bends 21 and 22 may protrude from the main waveform Wm in the first width direction V1 (the right direction in FIG. 6) and the main bends 21 and 22.
- a plurality of second bent portions 22 protruding in the second width direction V2 (left direction in FIG. 6) from the waveform Wm may be formed.
- the first bend 21 and the second bend 22 are formed at positions symmetrical with respect to each pitch center line Cp of the main waveform Wm.
- the ratio between the width direction pitch P and the second radius of curvature r is preferably in the range of 0.1 to 0.6.
- FIG. 10 is a graph of the average turbulent kinetic energy measured using the wave fin of the present invention, and is a graph showing the ratio of the pitch in the width direction P of the wave fin and the second radius of curvature r of the bends 21 and 22. It is a graph showing the turbulent kinetic energy, and the results are shown in Table 1 below.
- the average turbulent kinetic energy ratio refers to the ratio of the average turbulent kinetic energy for the conventional wave fin (control group) having no bend and the average turbulent kinetic energy for the wave fin having the bent portion of the present invention.
- the wave fin of the wave fin according to the present invention greatly increased the turbulent kinetic energy in the ratio between the width direction pitch P and the second radius of curvature r in the range of 0.1 to 0.6. That is, at 0.1 or less, there is almost no difference from the absence of the bent portions 21 and 22 (that is, there is almost no increase in turbulent kinetic energy), and at 0.6 or higher, the turbulent kinetic energy does not exceed 1.25 or more and is stagnant.
- the wave fin 10 of the present invention can be seen that the turbulent kinetic energy is optimized when the ratio between the width direction pitch (P) and the second curvature radius (r) is within the range of 0.1 ⁇ 0.6, it is 0.1 or less than 0.6 In this case, since the turbulent kinetic energy hardly increases or the increase in turbulent kinetic energy is stagnant, it can be seen that it is not preferable in terms of ease of processing and productivity.
- FIG. 7 is a first modified embodiment of FIG. 6, in which the first curved portion 21 protrudes toward the second width direction W2, and the second curved portion 22 faces the first width direction W1. It is a protruding structure.
- FIG. 8 illustrates a structure in which the first bent portion 21 and the second bent portion 22 protrude toward the first width direction W1 as the second modified embodiment of FIG. 6.
- FIG. 9 is a third modified embodiment of FIG. 6, in which the first bent portion 21 and the second bent portion 22 protrude toward the second width direction W2.
- the plurality of bent portions 21 and 22 are not limited to the configuration of FIG. 6, and may be formed to protrude in at least one of the first and second width directions W1 and W2 on the main waveform Wm. .
- Each vertex center line Ci, Cp of the first and second bends 21 and 22 may be formed to be inclined with respect to the vertex center line Cp of the main waveform Wm, and thereby the first and second bends 21 , 22 may be naturally connected in the middle of the main waveform Wm.
- the portion where the peak 11 and the side wall portion 13 are connected is connected to correspond to the curved portions 21 and 22, and the valley 12 and the side wall portion 13 are also connected. ) Is connected to correspond to the bent portion (21, 22).
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
제2곡률반경(r)/폭방향피치(P) | 평균운동에너지(J/kg) | 평균운동에너지 비율 |
0 | 1.932 | 1 |
0.11 | 1.964 | 1.017 |
0.17 | 2.042 | 1.057 |
0.24 | 2.146 | 1.111 |
0.41 | 2.356 | 1.219 |
0.59 | 2.381 | 1.232 |
Claims (9)
- 복수의 산과 복수의 골이 복수의 측벽부에 의해 폭방향으로 서로 이어져 있고, 상기 복수의 측벽부에는 산과 골 사이에는 유체가 통과하는 복수의 유체통로가 구획되어 형성되며,상기 복수의 산, 복수의 골, 복수의 측벽부는 길이방향을 따라 제1곡률반경으로 파형지게 연장되는 메인 파형(main waveform)을 형성하고,상기 측벽부의 메인 파형의 도중에는 하나 이상의 굴곡부가 형성되며, 상기 굴곡부는 제2곡률반경으로 굴곡지게 상기 메인 파형의 도중에 연결되는 것을 특징으로 하는 웨이브 핀.
- 청구항 1에 있어서,상기 제2곡률반경은 상기 제1곡률반경 보다 작게 형성되는 것을 특징으로 하는 웨이브 핀.
- 청구항 1에 있어서,상기 굴곡부는 상기 메인 파형의 각 정점 중심선을 기준으로 상호 대칭적인 위치에 각각 형성됨에 따라 상기 메인 파형의 도중에는 복수의 굴곡부가 형성되는 것을 특징으로 하는 웨이브 핀.
- 청구항 3에 있어서,상기 복수의 굴곡부는 상기 메인 파형에서 제1폭방향으로 돌출되는 복수의 제1굴곡부 및 상기 메인 웨이브라인에서 제2폭방향으로 돌출하는 복수의 제2굴곡부로 이루어지고, 상기 제1굴곡부와 제2굴곡부는 상기 메인 파형의 각 피치 중심을 기준으로 대칭적인 위치에 형성되는 것을 특징으로 하는 웨이브 핀.
- 청구항 3에 있어서,상기 복수의 굴곡부는 상기 메인 파형에서 제1 및 제2 폭방향 중에서 적어도 어느 하나의 폭방향으로 돌출하도록 형성되는 것을 특징으로 하는 웨이브 핀.
- 청구항 4에 있어서,상기 제1 및 제2 굴곡부의 정점 중심선은 상기 메인 파형의 정점 중심선에 대해 경사지게 형성되는 것을 특징으로 하는 웨이브 핀.
- 청구항 1에 있어서,상기 산과 상기 측벽부가 연결되는 부분은 상기 굴곡부에 대응하도록 형성되고, 상기 골과 상기 측벽부가 연결되는 부분은 상기 굴곡부에 대응하도록 형성되는 것을 특징으로 하는 웨이브 핀.
- 청구항 1에 있어서,상기 웨이브 핀의 폭방향 피치(P)와 제2곡률반경(r) 사이의 비율은 0.1~ 0.6인 것을 특징으로 하는 웨이브 핀.
- 청구항 1에 있어서,상기 유체통로는 직사각형, 사다리꼴, 라운드형 단면 구조 중에서 어느 하나로 이루어지는 것을 특징으로 하는 웨이브 핀.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN201280056816.5A CN103959005B (zh) | 2011-11-29 | 2012-02-17 | 波形散热片 |
JP2014540928A JP5941550B2 (ja) | 2011-11-29 | 2012-02-17 | ウェーブフィン |
EP12853290.0A EP2787316B1 (en) | 2011-11-29 | 2012-02-17 | Wave fins |
US14/357,584 US9945619B2 (en) | 2011-11-29 | 2012-02-17 | Wave fins |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2011-0125953 | 2011-11-29 | ||
KR1020110125953A KR101299072B1 (ko) | 2011-11-29 | 2011-11-29 | 웨이브 핀 |
Publications (1)
Publication Number | Publication Date |
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WO2013081249A1 true WO2013081249A1 (ko) | 2013-06-06 |
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ID=48535677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2012/001208 WO2013081249A1 (ko) | 2011-11-29 | 2012-02-17 | 웨이브 핀 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9945619B2 (ko) |
EP (1) | EP2787316B1 (ko) |
JP (1) | JP5941550B2 (ko) |
KR (1) | KR101299072B1 (ko) |
CN (1) | CN103959005B (ko) |
WO (1) | WO2013081249A1 (ko) |
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- 2012-02-17 CN CN201280056816.5A patent/CN103959005B/zh not_active Expired - Fee Related
- 2012-02-17 WO PCT/KR2012/001208 patent/WO2013081249A1/ko active Application Filing
- 2012-02-17 US US14/357,584 patent/US9945619B2/en not_active Expired - Fee Related
- 2012-02-17 JP JP2014540928A patent/JP5941550B2/ja not_active Expired - Fee Related
- 2012-02-17 EP EP12853290.0A patent/EP2787316B1/en not_active Not-in-force
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Also Published As
Publication number | Publication date |
---|---|
EP2787316A1 (en) | 2014-10-08 |
EP2787316B1 (en) | 2018-07-11 |
EP2787316A4 (en) | 2015-05-06 |
KR20130059784A (ko) | 2013-06-07 |
CN103959005B (zh) | 2016-03-02 |
CN103959005A (zh) | 2014-07-30 |
JP2014535030A (ja) | 2014-12-25 |
KR101299072B1 (ko) | 2013-08-27 |
US9945619B2 (en) | 2018-04-17 |
US20140360707A1 (en) | 2014-12-11 |
JP5941550B2 (ja) | 2016-06-29 |
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