JP2603224Y2 - Heat exchanger - Google Patents
Heat exchangerInfo
- Publication number
- JP2603224Y2 JP2603224Y2 JP1991029362U JP2936291U JP2603224Y2 JP 2603224 Y2 JP2603224 Y2 JP 2603224Y2 JP 1991029362 U JP1991029362 U JP 1991029362U JP 2936291 U JP2936291 U JP 2936291U JP 2603224 Y2 JP2603224 Y2 JP 2603224Y2
- Authority
- JP
- Japan
- Prior art keywords
- heat transfer
- pin
- transfer surface
- heat
- heat exchanger
- 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.)
- Expired - Fee Related
Links
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この考案に係る熱交換器は、ガス
タービン用熱交換器等の各種熱交換器として、空気によ
り、水や各種流体との間で熱交換を行なう場合に利用出
来る。The heat exchanger according to the present invention can be used as a heat exchanger for a gas turbine or the like when heat is exchanged with water or various fluids by air.
【０００２】[0002]
【従来の技術】各種熱交換器により、空気によって伝熱
管内を流れる流体を冷却したり、或は伝熱管内を流れる
流体により空気を冷却或は加温したりする事が広く行な
われている。又、各種熱交換器により伝熱管内を流れる
水等の流体と伝熱管外を流れる空気との間で熱交換を行
なう際に、伝熱管外面や伝熱フィン表面の境界層を破壊
し、上記水等の流体と空気との間での熱交換が効率良く
行なわれる様にする事も広く行なわれている。例えば特
開昭５５−１５７４４２号公報等に記載されている様
に、伝熱面にピンを植設する事により、この伝熱面に沿
って流れる空気を撹乱し、この空気と伝熱面との間の熱
交換が効率良く行なわれる様にする事が、ガスタービン
用熱交換器や暖房用熱交換器等、一部の熱交換器で行な
われている。このピン型の熱交換器は、図８に示す様
に、伝熱管の外面、或はフィンの表面等の伝熱面１に、
例えば丸棒状のピン２を植設し、伝熱面１に沿って流れ
る空気の流れを乱す事により、この伝熱面１の一部で、
上記ピン２の下流側に存在する部分の境界層を破壊する
様にしている。2. Description of the Related Art A variety of heat exchangers are widely used to cool a fluid flowing in a heat transfer tube by air, or to cool or heat air by a fluid flowing in the heat transfer tube. . Further, when performing heat exchange between a fluid such as water flowing in the heat transfer tube and air flowing outside the heat transfer tube by various heat exchangers, the heat transfer tube outer surface and the heat transfer fin surface boundary layer are destroyed. It has been widely practiced to efficiently exchange heat between a fluid such as water and air . For example, as described in Japanese Patent Application Laid-Open No. 55-157442, by implanting pins on the heat transfer surface, air flowing along the heat transfer surface is disturbed, and this air and the heat transfer surface Is performed by some heat exchangers such as a heat exchanger for a gas turbine and a heat exchanger for heating. As shown in FIG. 8, this pin type heat exchanger is provided on the outer surface of a heat transfer tube or a heat transfer surface 1 such as a fin surface.
For example, by implanting a round bar-shaped pin 2 and disturbing the flow of air flowing along the heat transfer surface 1, a part of the heat transfer surface 1
The boundary layer in a portion existing on the downstream side of the pin 2 is destroyed.
【０００３】[0003]
【考案が解決しようとする課題】ところが、従来の熱交
換器の場合、上記ピン２を伝熱面１に対し、直角に設け
ていた為、必ずしも最良の伝熱効果を得られなかった。
即ち、本考案者の研究によって、上記ピン２を伝熱面１
に対し、特定の方向に傾斜させる事により、ピン２を伝
熱面１に対して直角に設ける場合に比べて、良好な熱交
換性能を得られる事が解った。本考案の熱交換器は、こ
の様な事情に基づいて考案したものである。However, in the case of the conventional heat exchanger, since the pins 2 are provided at right angles to the heat transfer surface 1, the best heat transfer effect cannot always be obtained.
That is, according to the research of the present inventor, the pin 2 is connected to the heat transfer surface 1.
On the other hand, it has been found that by inclining in a specific direction, better heat exchange performance can be obtained as compared with the case where the pins 2 are provided at right angles to the heat transfer surface 1. The heat exchanger of the present invention has been devised based on such circumstances.
【０００４】[0004]
【課題を解決するための手段】本考案の熱交換器は、前
述した従来の熱交換器と同様に、伝熱面に断面形状が円
形であるピンを植設し、このピンによって伝熱面に沿っ
て流れる空気の撹乱を図っている。特に、本考案の熱交
換器に於いては、上記ピンを、空気の流れ方向上流側に
向けて傾斜させると共に、上記伝熱面に対する傾斜角度
を１０〜７０度とし、且つ、伝熱面から直角な方向から
見た場合に於けるピンの空気の流れ方向に対する傾斜角
度を±４５度の範囲内としている。According to the heat exchanger of the present invention, a pin having a circular cross section is planted on the heat transfer surface, and the heat transfer surface is formed by the pin, similarly to the above-described conventional heat exchanger. The disturbance of the air flowing along is planned. In particular, in the heat exchanger of the present invention, the pins are inclined toward the upstream side in the air flow direction, the inclination angle with respect to the heat transfer surface is set to 10 to 70 degrees, and from the heat transfer surface. The angle of inclination of the pin with respect to the direction of air flow when viewed from a right angle is within a range of ± 45 degrees.
【０００５】[0005]
【作用】上述の様に構成する本考案の熱交換器の場合、
伝熱面の一部で、ピンの下流側に存在する部分の境界層
の破壊を効率良く行なって、熱交換器の性能向上を図れ
る。In the case of the heat exchanger of the present invention configured as described above,
The boundary layer in a part of the heat transfer surface located downstream of the pin is efficiently destroyed, and the performance of the heat exchanger can be improved.
【０００６】[0006]
【実施例】以下、本考案の効果を確認する為に、本考案
者が行なった実験に就いて説明する。先ず、図１（Ａ）
に示す様に、伝熱面１を構成する金属板の表面に丸棒状
のピン２を、空気の流れ方向上流側（図１（Ａ）の左
側）に向け傾斜させた状態で植設した。ピン２と伝熱面
１とのなす角度θは６０度とした。そして、周囲よりも
高温の伝熱面１に沿って低温の空気を、上記ピン２に向
けて送り、この伝熱面１の表面温度を、サーモグラフィ
ーで測定した所、図２（Ａ）に示す様な冷却部が、伝熱
面１の一部で、ピン２の下流側部分に現われた。この図
２（Ａ）に示した冷却部に於いて、斜格子で表わされた
ａ部は、特に温度が低くなっている部分を、このａ部の
外側に存在し、斜線で表わされたｂ部は、比較的温度が
低くなっている部分を、このｂ部の外側に存在する白抜
きのｃ部は、少しだけ温度が低くなっている部分を、そ
れぞれ表わしている。又、冷却部の全長Ｌとピン２の外
径ｄとの比（Ｌ／ｄ）は、１５０となった。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, experiments performed by the present inventors to confirm the effects of the present invention will be described. First, FIG. 1 (A)
As shown in FIG. 1, a round bar-shaped pin 2 was implanted on the surface of a metal plate constituting the heat transfer surface 1 in a state of being inclined toward the upstream side in the air flow direction (left side in FIG. 1A). The angle θ between the pin 2 and the heat transfer surface 1 was 60 degrees. Then, low-temperature air is sent toward the pin 2 along the heat transfer surface 1 higher than the surroundings, and the surface temperature of the heat transfer surface 1 is measured by thermography, as shown in FIG. Such a cooling section appeared in a part of the heat transfer surface 1 and in a downstream portion of the pin 2. In the cooling part shown in FIG. 2A, the part a represented by a diagonal lattice has a particularly low temperature part outside the part a and is represented by a diagonal line. The b portion indicates a portion where the temperature is relatively low, and the white c portion outside the b portion indicates a portion where the temperature is slightly lower. The ratio (L / d) of the total length L of the cooling section to the outer diameter d of the pin 2 was 150.
【０００７】一方、図１（Ｂ）に示す様に、ピン２を、
空気の流れ方向下流側（図１（Ｂ）の右側）に向け傾斜
させて、ピン２と伝熱面１とのなす角度θを１２０度と
した場合には、伝熱面１の表面には、図２（Ｂ）に示す
様に、少しだけ温度の低いｃ部のみの冷却部しか現われ
なかった。この際、冷却部の全長ｌとピン２の外径ｄと
の比（ｌ／ｄ）は、２０となった。又、図示は省略した
が、前記図８に示す様に、ピン２を伝熱面１に対して垂
直に設けた場合には、上記ｃ部も殆ど現われなかった。On the other hand, as shown in FIG.
If the angle θ between the pin 2 and the heat transfer surface 1 is set to 120 degrees by inclining toward the downstream side of the air flow direction (to the right in FIG. 1B), the surface of the heat transfer surface 1 As shown in FIG. 2 (B), only the cooling part of the part c having a slightly lower temperature appeared. At this time, the ratio (l / d) of the total length 1 of the cooling section to the outer diameter d of the pin 2 was 20. Although not shown, when the pins 2 were provided perpendicular to the heat transfer surface 1 as shown in FIG. 8, the above-mentioned portion c hardly appeared.
【０００８】次に、図３（Ａ）に示す様に、ピン２を空
気の流れ方向上流側に向け傾斜させると共に、ピン２と
伝熱面１とのなす角度θを３０度とした場合には、図４
（Ａ）に示す様な冷却部が現われ、図３（Ｂ）に示す様
に、ピン２を下流側に向け傾斜させて、ピン２と伝熱面
１とのなす角度を１５０度とした場合には、伝熱面１の
表面には、図４（Ｂ）に示す様な冷却部しか現われなか
った。[0008] Next, as shown in FIG. 3 (A), the pin 2 sky
When the angle θ between the pin 2 and the heat transfer surface 1 is set to 30 degrees while being inclined toward the upstream side in the gas flow direction, FIG.
When a cooling section as shown in FIG. 3A appears, and as shown in FIG. 3B, the pin 2 is inclined toward the downstream side so that the angle between the pin 2 and the heat transfer surface 1 is 150 degrees. In FIG. 4, only a cooling portion as shown in FIG. 4B appeared on the surface of the heat transfer surface 1.
【０００９】この様な実験を、ピン２の傾斜角度θを０
〜１８０度の間で変えて行ない、傾斜角度θと放熱量
（冷却部の面積と低下温度との積）との関係を求めた
所、図５に示す様な結果を得られた。この図５から明ら
かな通り、ピン２を空気の流れ方向上流側に向け傾斜さ
せる事により、伝熱面１と空気との間の熱交換を良好に
して、この伝熱面１の温度を低下させる事が出来る。In such an experiment, the inclination angle θ of the pin 2 was set to 0.
When the relationship between the inclination angle θ and the amount of heat radiation (the product of the area of the cooling part and the reduced temperature) was obtained by changing the angle between 180 ° and 180 °, the result shown in FIG. 5 was obtained. As is clear from FIG. 5, by inclining the pin 2 toward the upstream side in the air flow direction, the heat exchange between the heat transfer surface 1 and the air is improved, and the temperature of the heat transfer surface 1 is reduced. Can be done.
【００１０】又、図６に示す様に、伝熱面１から直角な
方向から見た場合に於ける、ピン２の空気の流れ方向に
対する傾斜角度αを±０〜９０度の範囲で変えた場合、
前記放熱量は、図７に示す様に変化した。この図７から
明らかな通り、上記傾斜角度αは、±４５度の範囲内と
する必要がある。尚、この図７に於いて、実線ａはピン
２と伝熱面１とのなす角度θを３０度とした場合に於け
る、上記流れ方向に対する傾斜角度αと冷却部の面積と
の関係を、破線ｂは上記角度θを６０度とした場合に於
ける上記関係を、鎖線ｃは上記角度θを９０度とした場
合に於ける上記関係を、それぞれ表している。尚、上述
の様なピン２は、伝熱面の表面に多数植設されるが、伝
熱面としては、扁平管等の通液管の表面、或は伝熱フィ
ンの表面等が考えられる。Further, as shown in FIG. 6, when viewed from a direction perpendicular to the heat transfer surface 1, the inclination angle α of the pin 2 with respect to the air flow direction is changed within a range of ± 0 to 90 degrees. If
The heat release amount changed as shown in FIG. As is clear from FIG. 7, the inclination angle α needs to be within a range of ± 45 degrees. In FIG. 7, the solid line a indicates the relationship between the inclination angle α with respect to the flow direction and the area of the cooling section when the angle θ between the pin 2 and the heat transfer surface 1 is 30 degrees. , The broken line b represents the above relationship when the angle θ is 60 degrees, and the dashed line c represents the relationship when the angle θ is 90 degrees. In addition, many pins 2 as described above are planted on the surface of the heat transfer surface, and the heat transfer surface may be a surface of a liquid passage tube such as a flat tube, a surface of a heat transfer fin, or the like. .
【００１１】[0011]
【考案の効果】本考案の熱交換器は、以上に述べた通り
構成され作用する為、伝熱面と空気との間の熱交換を効
果的に行なって、熱交換器の性能を向上させる事が出来
る。The heat exchanger of the present invention is constructed and operates as described above, so that heat exchange between the heat transfer surface and the air is effectively performed to improve the performance of the heat exchanger. I can do things.
【図１】ピンを空気の流れ方向に対して傾斜させた状態
の２例を示す側面図。FIG. 1 is a side view showing two examples of a state where a pin is inclined with respect to a flow direction of air .
【図２】図１のピンにより得られる冷却部を示す平面
図。FIG. 2 is a plan view showing a cooling unit obtained by the pins of FIG. 1;
【図３】ピンを空気の流れ方向に対して傾斜させた状態
の別の２例を示す側面図。FIG. 3 is a side view showing another two examples of the state where the pins are inclined with respect to the direction of air flow.
【図４】図３のピンにより得られる冷却部を示す平面
図。FIG. 4 is a plan view showing a cooling unit obtained by the pins of FIG. 3;
【図５】ピンの傾斜角度と放熱量との関係を示す線図。FIG. 5 is a diagram showing a relationship between a tilt angle of a pin and a heat release amount.
【図６】ピンを伝熱面から直角な方向から見た状態で示
す図。FIG. 6 is a view showing the pin as viewed from a direction perpendicular to the heat transfer surface.
【図７】流れ方向に対する傾斜角度と放熱量との関係を
示す線図。FIG. 7 is a diagram showing a relationship between an inclination angle with respect to a flow direction and a heat release amount.
【図８】従来から行なわれている、ピンの植設状態を示
す側面図。FIG. 8 is a side view showing a conventional state of pin implantation.
１ 伝熱面 ２ ピン 1 Heat transfer surface 2 Pin
───────────────────────────────────────────────────── フロントページの続き (72)考案者 西脇 仁一 東京都世田谷区松原６丁目18番11号 (72)考案者 山口 正義 埼玉県和光市下新倉2070−１ 宮ノ台ハ イツ201 (72)考案者 高野 祐二 東京都中野区南台５丁目24番15号 カル ソニック株式会社内 (56)参考文献 特開 昭60−263095（ＪＰ，Ａ) 特開 昭62−98199（ＪＰ，Ａ) 特開 昭61−153387（ＪＰ，Ａ) 特公 昭57−42838（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) F28F 1/12 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Jinichi Nishiwaki 6-18-11 Matsubara, Setagaya-ku, Tokyo (72) Inventor Masayoshi Yamaguchi 2070-1 Shimo-Nikura, Wako-shi, Saitama Miyanodai Heights 201 (72) Inventor Yuji Takano 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Corporation (56) References JP-A-60-263095 (JP, A) JP-A-62-98199 (JP, A) JP-A 61 -153387 (JP, A) JP-B-57-42838 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) F28F 1/12
Claims (1)
設し、このピンによって伝熱面に沿って流れる空気の撹
乱を図った熱交換器に於いて、上記ピンを、空気の流れ
方向上流側に向けて傾斜させると共に、上記伝熱面に対
する傾斜角度を１０〜７０度とし、且つ、伝熱面から直
角な方向から見た場合に於けるピンの空気の流れ方向に
対する傾斜角度を±４５度の範囲内とした事を特徴とす
る熱交換器。1. A cross-sectional shape in the heat transfer surface is implanted the pin is circular, in the heat exchanger which aimed at disrupting the air flowing along the heat transfer surface by the pin, the pin, the air Inclined toward the upstream in the flow direction, the angle of inclination with respect to the heat transfer surface is set to 10 to 70 degrees, and the angle of inclination of the pin with respect to the direction of air flow when viewed from a direction perpendicular to the heat transfer surface. Is within a range of ± 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991029362U JP2603224Y2 (en) | 1991-04-03 | 1991-04-03 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991029362U JP2603224Y2 (en) | 1991-04-03 | 1991-04-03 | Heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04122963U JPH04122963U (en) | 1992-11-05 |
| JP2603224Y2 true JP2603224Y2 (en) | 2000-03-06 |
Family
ID=31913239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991029362U Expired - Fee Related JP2603224Y2 (en) | 1991-04-03 | 1991-04-03 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2603224Y2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5742838A (en) * | 1980-08-27 | 1982-03-10 | Komatsu Ltd | Microhardness meter |
| JPS60263095A (en) * | 1984-06-07 | 1985-12-26 | Mitsubishi Heavy Ind Ltd | Heat exchanging tube equipped with needle-type fin and manufacture thereof |
| JPS61153387A (en) * | 1984-12-27 | 1986-07-12 | Matsushita Refrig Co | Heat exchanger |
-
1991
- 1991-04-03 JP JP1991029362U patent/JP2603224Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04122963U (en) | 1992-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |