JPS58120086A - Heat transmitting tube - Google Patents
Heat transmitting tubeInfo
- Publication number
- JPS58120086A JPS58120086A JP270882A JP270882A JPS58120086A JP S58120086 A JPS58120086 A JP S58120086A JP 270882 A JP270882 A JP 270882A JP 270882 A JP270882 A JP 270882A JP S58120086 A JPS58120086 A JP S58120086A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- heat exchanger
- tunnels
- thin
- outer tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
- F28F13/185—Heat-exchange surfaces provided with microstructures or with porous coatings
- F28F13/187—Heat-exchange surfaces provided with microstructures or with porous coatings especially adapted for evaporator surfaces or condenser surfaces, e.g. with nucleation sites
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は管内に相変化する流体を流通すると同時に、管
外に別個の流体を流通することにより、熱交換させる伝
熱管に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat transfer tube that exchanges heat by flowing a phase-changing fluid inside the tube and at the same time flowing a separate fluid outside the tube.
従来の熱交換器用伝熱管としてはfs1図に示すように
、管内面に何尋加工を施されていない平滑面を有する伝
熱管1が一般に使用されているが、最近は伝熱管の熱伝
達率を向上させるために、管内部に突起物を挿入したイ
ンナーチューブなどが開発されている。As shown in the fs1 diagram, as a conventional heat exchanger tube for a heat exchanger, a heat exchanger tube 1 having a smooth surface without any processing on the inner surface of the tube is generally used, but recently the heat transfer coefficient of the heat exchanger tube In order to improve this, inner tubes with protrusions inserted inside the tube have been developed.
上記インナーチューブによれば、熱伝達率を向上させる
ことはできるが、圧力損失は著しく増大する欠点がある
。また管内面にらせん状溝を設は良伝熱管(図示せず)
もあるが、この伝熱管は熱伝達率が良好であるから広く
使用されている。ところが、より一層の省エネルギー化
をはかるためには、伝熱管の熱伝達率をさらに向上させ
ることが要求されている。According to the above-mentioned inner tube, although the heat transfer coefficient can be improved, the disadvantage is that the pressure loss increases significantly. In addition, a spiral groove is provided on the inner surface of the tube for better heat transfer (not shown).
However, this heat exchanger tube is widely used because it has a good heat transfer coefficient. However, in order to achieve further energy savings, it is required to further improve the heat transfer coefficient of heat exchanger tubes.
本発明は上記要求を満足させる伝熱管を提供することを
目的とするもので、伝熱管内に任意数の細孔を有する環
状の薄肉部材を挿入し、この薄肉部材と前記管との間に
断面が適宜形状の連続したトンネルを形成し、このトン
ネルと前記薄肉部材内とを前記細孔を介して互に連通ず
るようにしたことを特徴とするものである。An object of the present invention is to provide a heat exchanger tube that satisfies the above-mentioned requirements.An annular thin-walled member having an arbitrary number of pores is inserted into the heat exchanger tube, and between this thin-walled member and the tube. The present invention is characterized in that a continuous tunnel having an appropriately shaped cross section is formed, and the tunnel and the interior of the thin member are communicated with each other via the pores.
以下本発明の実施例を図面について説明する。Embodiments of the present invention will be described below with reference to the drawings.
第2図ないし第6図において、1は外径をDo。In FIGS. 2 to 6, 1 indicates the outer diameter Do.
内径をり、にそれぞれ形成した外管、2は外管1の内壁
に任意数設けられた細溝で、この細溝2はその断面が規
則正しく連続的に三角形に形成されている。3は外径k
do、内径をd、にそれぞれ形成し、かつ円周面に任意
数の細孔4を設けた薄肉内管で、その外径d0は前記外
管1の内径D1より小径に形成されている。The outer tube 2, which has an inner diameter, is formed in an arbitrary number on the inner wall of the outer tube 1, and the narrow grooves 2 have regular and continuous triangular cross sections. 3 is the outer diameter k
It is a thin inner tube having an inner diameter of d and an arbitrary number of pores 4 on its circumferential surface, and its outer diameter d0 is smaller than the inner diameter D1 of the outer tube 1.
本実施例では、外管lの内周面に三角形状の細溝2を設
けたが、これに代シ第7図および第8図に示すように台
形状細溝2A、矩形状細溝2B1゜設けてもよく、また
は不規則な形状の細溝(図示せず)を設けてもよい、一
方、内管3に設けた細孔4は第6図に示すように矩形状
に限定されず、三角形、円形あるいはその他の複雑な形
状に形成してもよい。In this embodiment, a triangular narrow groove 2 is provided on the inner circumferential surface of the outer tube 1, but as shown in FIGS. 7 and 8, a trapezoidal groove 2A and a rectangular narrow groove 2B1゜ or irregularly shaped narrow grooves (not shown) may be provided.On the other hand, the pores 4 provided in the inner tube 3 are not limited to the rectangular shape as shown in FIG. , triangular, circular or other complex shapes.
上記内管3と外管lを一体に結合する一手段について述
べるに、まず第9図に示すように外管l内に内管3′t
−挿入し、ついで第10図に示すように内、外管3,1
の一方側(図では左(Ml )から第11図に示す拡管
工具6を内管3内に圧入する。To describe one means for integrally connecting the inner tube 3 and the outer tube l, first, as shown in FIG.
- Insert the inner and outer tubes 3 and 1 as shown in Figure 10.
A tube expansion tool 6 shown in FIG. 11 is press-fitted into the inner tube 3 from one side (the left (Ml) in the figure).
次に拡管工具6を回転しながら矢印方向に前進させると
、内管3は拡開されて外管1の内壁に順次に密着して一
体に結合される。同時に第4図に示すような断面三角形
状の連続したトンネル5が形成されると共に、そのトン
ネル5と内管3内は細孔4を介して互に連通される。Next, when the tube expansion tool 6 is rotated and moved forward in the direction of the arrow, the inner tube 3 is expanded and successively closely adhered to the inner wall of the outer tube 1 and joined together as one body. At the same time, a continuous tunnel 5 having a triangular cross section as shown in FIG.
前記外管1の細溝2のピッチと深さおよび内管3の細孔
4のピッチと孔径によシ性能が変化するため、伝熱管の
仕様に合せて寸法を決定する必要がある。また本実施例
では、外管1と内管3を伝熱の見地から考慮して密着さ
せ九が、特に前記内、外管3,1は密着させる必要はな
く、内管3を外管1内に挿入するだけでも効果があるこ
とは云うまでもないことがある。Since the performance changes depending on the pitch and depth of the narrow grooves 2 of the outer tube 1 and the pitch and diameter of the pores 4 of the inner tube 3, it is necessary to determine the dimensions according to the specifications of the heat exchanger tube. In addition, in this embodiment, the outer tube 1 and the inner tube 3 are brought into close contact with each other from the standpoint of heat transfer. It goes without saying that simply inserting it inside the body can be effective.
本実施例は上記のような構成からなり、トンネル5内を
流通する液体7は外管lの外側を流通する気体を介して
加熱されるため、前記液体7は蒸気m5ft発生する。The present embodiment has the above-mentioned configuration, and since the liquid 7 flowing inside the tunnel 5 is heated via the gas flowing outside the outer tube 1, the liquid 7 generates vapor m5ft.
このように蒸気泡8が−たん発生すると、トンネル7内
には常に蒸気泡が保持されて気泡核9となシ、気泡の成
長と離脱が活発に行われるようになる。When the steam bubbles 8 are generated in this way, the steam bubbles are always retained in the tunnel 7 and become bubble nuclei 9, and the bubbles actively grow and separate.
次に他の実施例を第12図ないし第19図について説明
する。Next, another embodiment will be described with reference to FIGS. 12 to 19.
第12図および第13図において、11は外管、12は
断面が連続した凹凸部からなる環状円周面を有する薄肉
の内管で、この内管12は外管11に内接して連続した
トンネル14が形成されている。13は内管12の凹部
の底部および凸部の頂部にそれぞれ設けられた細孔で、
この細孔13を介してトンネル14は内管12内と連通
されている。In FIGS. 12 and 13, 11 is an outer tube, and 12 is a thin inner tube having an annular circumferential surface consisting of a concavo-convex portion with a continuous cross section. This inner tube 12 is inscribed in and continuous with the outer tube 11. A tunnel 14 is formed. 13 are pores provided at the bottom of the concave portion and the top of the convex portion of the inner tube 12, respectively;
The tunnel 14 communicates with the interior of the inner tube 12 through this pore 13 .
上記内管12は次のようにして製作される。すなわち、
まず第14図に示すように矩形状に形成された細孔13
を多数膜は九薄肉板12Aを、第15図に示すように矢
印E−D方向に一定間隔Pで任意回数屈折することによ
り、連続した波形の薄肉板12Aを形成する。ついで、
このような波形状の薄肉板12Aを矢印F−G方向に外
管11の内径に見合った曲率で彎曲することによシ、第
12図に示す内管12を製作することができる。The inner tube 12 is manufactured as follows. That is,
First, as shown in FIG. 14, the pores 13 are formed in a rectangular shape.
A continuous corrugated thin plate 12A is formed by bending the nine thin plates 12A in the direction of the arrow ED at a predetermined interval P an arbitrary number of times as shown in FIG. Then,
The inner tube 12 shown in FIG. 12 can be manufactured by curving such a corrugated thin plate 12A in the direction of the arrow FG with a curvature commensurate with the inner diameter of the outer tube 11.
この場合、第15図に示す薄肉板12Aの矢印E−D方
向の波形は、第14図に示す矢印C−D方向にも同様に
形成される。また第15図に示す薄肉板12Aでは、細
孔13は波形の中間部に設けられているが、これに代シ
第16図に示すように波形の頂部および底部に細孔13
を設けてもよい。In this case, the waveform of the thin plate 12A shown in FIG. 15 in the direction of the arrow ED is similarly formed in the direction of the arrow CD shown in FIG. In addition, in the thin plate 12A shown in FIG. 15, the pores 13 are provided in the middle part of the corrugations, but instead, as shown in FIG.
may be provided.
第17図および第18図に示す実施例は薄肉板12Aの
波形の変形例、すなわち矩形状および鋸歯形状の波形を
示したもので、このような形状は第15図と同様にして
形成することができる。前記鋸歯形状波形(第18図)
の斜視図を第19図に示す。このような波形の薄肉板1
2Aを矢印F−G方向に、かつ外管に見合った曲率で環
状に彎曲して内管12を形成し、この内管12を112
図に示すように外管11内に挿入する。外管11と内管
12を図示のように接触させ、半田付け、ろう付けおよ
びその他の接着させる。もし薄肉板12Aの第19図の
矢印F −G方向に対する弾性力が強いときには、前記
のように接層手段にょシ固定する必要はない。The embodiments shown in FIGS. 17 and 18 show modified examples of the waveform of the thin plate 12A, that is, rectangular and sawtooth waveforms. Such shapes can be formed in the same manner as in FIG. 15. I can do it. Said sawtooth waveform (Figure 18)
A perspective view of the is shown in FIG. Such a corrugated thin plate 1
2A is annularly curved in the direction of arrow FG with a curvature commensurate with the outer tube to form the inner tube 12.
Insert it into the outer tube 11 as shown in the figure. The outer tube 11 and the inner tube 12 are brought into contact with each other as shown, and then soldered, brazed, or otherwise bonded. If the thin plate 12A has a strong elastic force in the direction of arrows F-G in FIG. 19, it is not necessary to fix it to the contacting means as described above.
上記のように構成された第12図およびwJ13図に示
す伝熱管では、外管11および内管12によシ連続した
トンネル14が形成され、このトンネル14の頂部と底
部には細孔13が設けられている。したがって外管1の
内面近傍を流通する液体15のうち、トンネル14内の
液体15aは外管lの外側を流通する気体16によシ加
熱されるため、その液体15aは蒸気泡171に発生す
る。In the heat exchanger tube shown in FIG. 12 and FIG. It is provided. Therefore, among the liquid 15 flowing near the inner surface of the outer tube 1, the liquid 15a inside the tunnel 14 is heated by the gas 16 flowing outside the outer tube 1, so that the liquid 15a generates vapor bubbles 171. .
このように蒸気泡17が−たん発生すると、トンネル1
4内には常に蒸気泡が保持されて気泡核18となり、気
泡の成長と離脱が活発に行われるようになる。When the steam bubbles 17 are generated in this way, the tunnel 1
Steam bubbles are always retained in the chamber 4 and become bubble nuclei 18, and the bubbles actively grow and separate.
して任意角度だけ傾斜するように配設しても同様な効果
をうろことが可能である。The same effect can be obtained even if the device is arranged so as to be tilted at an arbitrary angle.
以上説明したように本発明によれば、内・外管にニジ形
成されたトンネル内には、常に蒸気泡が保持されて気泡
核となシ、蒸気泡の成長と離脱が活発に行われるので、
内管内を流通する液体が沸騰あるいは蒸発するときの熱
伝達率は著しく増大するから、伝熱性能を大幅に向上さ
せることができる。As explained above, according to the present invention, steam bubbles are always retained in the tunnels formed in the inner and outer tubes and become bubble nuclei, and the growth and separation of the steam bubbles are actively carried out. ,
Since the heat transfer coefficient increases significantly when the liquid flowing through the inner tube boils or evaporates, heat transfer performance can be significantly improved.
第1図は従来の伝熱管の斜視図、第2図は本発明の伝熱
管の一実施例を示す断面図、m3図は同実施例の内部の
一部展開図、第4図は第2図のA−A断面図、第5図お
よび第6図は第2図の外管および内管のそれぞれの斜視
図、第7図ン工び第8図は外管に設けた細溝の変形例を
示す図、第9図および110図は伝熱管の製作手段を示
す説明図、第11図は拡管工具の斜視図、第12図は本
発明に係わる他の実施例を示す断面図、第13図は第1
2図のB部拡大詳細図、第14図ないし第19図は内管
の製作説明図である。
1.11・・・外管、2・・・細溝、3.12・・・薄
肉部材(内管)、4,13・・・細孔、4.14・・・
トンネル。
代理人 弁理士 薄田利幸
第 1 図
不 3 図
1
第 4 図
高 乙 En
4′X
葛7図
市 B 図
第 q 図
)
第 /D 図
73
茗71 図
% +z l1121
不 13 図
%74図
0
第 1s 図
第16図
¥5 /7図
第 78 図
% tQ図Figure 1 is a perspective view of a conventional heat exchanger tube, Figure 2 is a sectional view showing an embodiment of the heat exchanger tube of the present invention, Figure m3 is a partially exploded view of the inside of the same embodiment, and Figure 4 is a The A-A sectional view in the figure, Figures 5 and 6 are respective perspective views of the outer tube and inner tube in Figure 2, and Figures 7 and 8 are deformation of the thin groove provided in the outer tube. FIGS. 9 and 110 are explanatory diagrams showing means for manufacturing heat exchanger tubes, FIG. 11 is a perspective view of a tube expansion tool, and FIG. 12 is a cross-sectional view showing another embodiment of the present invention. Figure 13 is the first
An enlarged detailed view of part B in FIG. 2 and FIGS. 14 to 19 are explanatory views for manufacturing the inner tube. 1.11... Outer tube, 2... Thin groove, 3.12... Thin wall member (inner tube), 4,13... Pore, 4.14...
tunnel. Agent Patent Attorney Toshiyuki Usuda No. 1 No. 3 No. 1 No. 4 No. 4 No. 7 En 4' Figure 1s Figure 16 ¥5 / Figure 7 Figure 78 % tQ diagram
Claims (1)
とによシ、その両流体間で熱交換を行わせるようにした
伝熱管において、この管内に任意数の細孔を有する環状
の薄肉部材を挿入し、この薄肉部材と前記管との間に断
面が適宜形状の連続したトンネルを形成し、このトンネ
ルと前記薄肉部材内とを前記細孔を介して互に連通ずる
ようにしたことを特徴とする伝熱管。 2、特許請求の範囲11項記載の伝熱管において、その
管内壁に任意数の細溝を設けると共に、その薄肉部材と
して前記管の内径より小径で、かつ任意数の細孔を有す
る薄肉管を用いることを特徴とする伝熱管。 3、特許請求の範囲第1項記載の伝熱管において、薄肉
部材として任意数の細孔を有する波形状薄肉板を、前記
管の内径よシ小径の曲率で彎曲して成形した環状管を用
いることを特徴とする伝熱管。[Claims] 1. In a heat transfer tube in which heat exchange is performed between the two fluids by flowing different fluids inside and outside the tube, an arbitrary number of pores are provided in the tube. A continuous tunnel having an appropriately shaped cross section is formed between the thin walled member and the tube, and this tunnel and the interior of the thin walled member are interconnected through the pores. A heat exchanger tube characterized by being made to communicate. 2. In the heat exchanger tube according to claim 11, an arbitrary number of narrow grooves are provided on the inner wall of the tube, and the thin-walled member is a thin-walled tube having a diameter smaller than the inner diameter of the tube and having an arbitrary number of pores. A heat exchanger tube characterized in that it is used. 3. In the heat exchanger tube according to claim 1, an annular tube formed by curving a corrugated thin plate having an arbitrary number of pores with a curvature smaller than the inner diameter of the tube is used as the thin wall member. A heat exchanger tube characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP270882A JPS58120086A (en) | 1982-01-13 | 1982-01-13 | Heat transmitting tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP270882A JPS58120086A (en) | 1982-01-13 | 1982-01-13 | Heat transmitting tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58120086A true JPS58120086A (en) | 1983-07-16 |
Family
ID=11536788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP270882A Pending JPS58120086A (en) | 1982-01-13 | 1982-01-13 | Heat transmitting tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58120086A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4747448A (en) * | 1983-11-01 | 1988-05-31 | The Boc Group, Plc | Heat exchangers |
US4794984A (en) * | 1986-11-10 | 1989-01-03 | Lin Pang Yien | Arrangement for increasing heat transfer coefficient between a heating surface and a boiling liquid |
-
1982
- 1982-01-13 JP JP270882A patent/JPS58120086A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4747448A (en) * | 1983-11-01 | 1988-05-31 | The Boc Group, Plc | Heat exchangers |
US4794984A (en) * | 1986-11-10 | 1989-01-03 | Lin Pang Yien | Arrangement for increasing heat transfer coefficient between a heating surface and a boiling liquid |
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