JPS6268112A - Heat exchanger for thermal electricity generation - Google Patents
Heat exchanger for thermal electricity generationInfo
- Publication number
- JPS6268112A JPS6268112A JP20733185A JP20733185A JPS6268112A JP S6268112 A JPS6268112 A JP S6268112A JP 20733185 A JP20733185 A JP 20733185A JP 20733185 A JP20733185 A JP 20733185A JP S6268112 A JPS6268112 A JP S6268112A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- medium introduction
- heat medium
- duct
- introduction duct
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/18—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the air being heated from the plant exhaust gases
- B60H1/20—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the air being heated from the plant exhaust gases using an intermediate heat-transferring medium
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は内燃ｌ！！ｒａｌｌの排ガスの熱エネルギを利
用する熱発電用熱交換器に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention applies to internal combustion l! ! The present invention relates to a heat exchanger for thermal power generation that utilizes the thermal energy of exhaust gas from a RALL.
［従来の技術］
熱発電素子は熱媒導入管の外周側に配設され、この外側
を温風ダクトにより覆われる。ところで、熱発電素子は
、第４図に示すように、熱発電素子の一方側と他方側と
の温度差に比例して発？！能力が増大し、特に温度差が
大きいほど発電能力は大きく、温度差が小さいと発電能
力は実用上望めない。また、熱発電素子にはその機能を
発揮するのに最適な１度があり、この最適温度を越える
と熱発電素子は破壊してしまう。したがって、効率のよ
い発電を１９るためには、温度差が大きくかつ熱発電素
子に最適な温度を保つことが必要である。[Prior Art] A thermoelectric power generating element is disposed on the outer peripheral side of a heat medium introduction pipe, and the outside thereof is covered with a hot air duct. By the way, as shown in FIG. 4, a thermoelectric generating element generates electricity in proportion to the temperature difference between one side and the other side of the thermoelectric generating element. ! As the capacity increases, especially as the temperature difference increases, the power generation capacity increases, and if the temperature difference is small, the power generation capacity cannot be practically expected. Furthermore, thermoelectric generators have an optimum temperature of 1 degree at which they can perform their functions, and if this optimum temperature is exceeded, the thermoelectric generators will be destroyed. Therefore, in order to generate electricity efficiently, it is necessary to maintain a large temperature difference and an optimum temperature for the thermoelectric power generation element.
ところが、熱媒の流れに沿って熱発電素子を配置する場
合、熱媒の温度は入口から出口へ向って次第に温度が低
下するので、入口側ではむしろ発電素子の最適温度より
も高すぎる一方、出口側では温度が低すぎて十分な発電
能力を発揮し得ないという問題がある。However, when the thermoelectric generator is placed along the flow of the heat medium, the temperature of the heat medium gradually decreases from the inlet to the outlet, so the temperature on the inlet side is actually higher than the optimum temperature of the power generating element. There is a problem in that the temperature on the exit side is too low to produce sufficient power generation capacity.
このような問題は一般的な熱交換器、例えば冷房用空気
を冷却する冷却器などにおいても同法であり、冷却域に
おいて均一に冷却された冷房用空気をｉりることが望ま
しい。このような問題を解決するために、例えば実開昭
５７−１２０８８７号公報に開示されるように、冷媒導
入管の受熱フィンのピッチを上流側では大きく、下流側
に至るほど小さくするものが提案されている。This problem also occurs in general heat exchangers, such as coolers that cool cooling air, and it is desirable to distribute cooling air that is uniformly cooled in the cooling area. In order to solve this problem, it has been proposed to make the pitch of the heat receiving fins of the refrigerant introduction pipe larger on the upstream side and smaller on the downstream side, as disclosed in, for example, Japanese Utility Model Application Publication No. 57-120887. has been done.
しかし、この従来技術をそのまま熱発電用熱交換器に適
用することはできない。なぜなら、熱発電素子は熱媒導
入管と絶縁された状態すなわち−股には熱媒導入管の外
側に電気絶縁体を介して配置されるのが一般的であるの
で、熱媒導入管の外側にそのピッチを異ならしめで受熱
フィンを設けることは不可能である。However, this conventional technology cannot be directly applied to a heat exchanger for thermal power generation. This is because the thermoelectric generating element is generally placed in a state insulated from the heat medium introduction pipe, that is, on the outside of the heat medium introduction pipe via an electrical insulator. It is impossible to provide heat receiving fins with different pitches.
［発明が解決しようとする問題点］
本発明の目的は、熱媒導入管の流れの方向に沿って十分
長い熱定’ｍｓ子を配設することができ、しかも入口側
と出口側とで温度差が少なく、最適な熱発電能力を得る
ことができる熱発電用熱交換器を提供することにある。[Problems to be Solved by the Invention] An object of the present invention is to be able to dispose a sufficiently long thermal constant along the flow direction of the heat medium introduction pipe, and to provide a thermal constant between the inlet side and the outlet side. An object of the present invention is to provide a heat exchanger for thermal power generation that has a small temperature difference and can obtain optimal thermal power generation capacity.
Ｅ問題を解決するための手段〕
上記目的を達成するために、本発明の構成は熱媒導入管
の入口側では、該熱媒導入管の内部に配設する受熱フィ
ンの面積を小さく、出口側に至るにしたがって受熱フィ
ンの面積を次第に大きくしたものである。Means for Solving Problem E] In order to achieve the above object, the configuration of the present invention is such that on the inlet side of the heat medium introduction pipe, the area of the heat receiving fins disposed inside the heat medium introduction pipe is reduced, and The area of the heat-receiving fins gradually increases toward the sides.
［作用］
熱媒導入管４の入口側内面には伝熱面積の小さい受熱フ
ィン１３が設けられ、出口側に沿って次第に受熱フィン
１３の伝熱面積が大きくなる。受熱フィン１３を設ける
ことにより、熱媒の温度が入口から出口に至るまでほぼ
均一に保たれる。したがって、熱発電素子５に最適な温
度が保たれ、熱発電素子５の外側を取り囲む温風ダクト
７との温度差に対応して効果的な熱発電が達せられる。[Function] Heat receiving fins 13 having a small heat transfer area are provided on the inner surface of the inlet side of the heat medium introduction pipe 4, and the heat transfer area of the heat receiving fins 13 gradually increases along the outlet side. By providing the heat-receiving fins 13, the temperature of the heat medium is maintained substantially uniform from the inlet to the outlet. Therefore, an optimum temperature is maintained for the thermoelectric generating element 5, and effective thermoelectric power generation can be achieved in accordance with the temperature difference between the thermoelectric generating element 5 and the hot air duct 7 surrounding the outside thereof.
これによって、熱定？！素子５を比較的細い熱媒導入管
４に沿って長く配Ｗ１ｒｊることができ、全体として小
型でありながら、大きな熱発電能力を得ることができる
。Is this heat fixed? ! The element 5 can be arranged for a long length W1rj along the relatively thin heat medium introduction pipe 4, and a large thermal power generation capacity can be obtained although the overall size is small.
［発明の実施例］
本発明を実施例に基づいて説明するつ第１図に示すよう
に、内燃機関の排ガスを熱媒として使用する熱発電用熱
交換器の実施例について示す。別間の排気管に接続され
る熱媒導入管４には、Ｕ字形に湾曲された外管ないしｉ
ｌｌダクト７を直線的に貫通して配置される。そして、
熱媒導入！！４と温風ダクト７とが同心に配置される部
分で、熱媒導入管４とこの外側に配設した円筒形のハウ
ジング１０との間の空間に熱定１！塵子５が収容される
。[Embodiments of the Invention] The present invention will be described based on embodiments. As shown in FIG. 1, an embodiment of a heat exchanger for thermoelectric power generation using exhaust gas of an internal combustion engine as a heat medium will be described. The heat medium introduction pipe 4 connected to the exhaust pipe between the other parts has a U-shaped outer pipe or an i
ll duct 7 in a straight line. and,
Introducing heat medium! ! 4 and the hot air duct 7 are arranged concentrically, and a heat constant 1! Dust particles 5 are accommodated.
熱媒導入管４の左端部が入口とされ、これに内燃１関の
排気管が接続される一方、右端部は出口とされ、これに
マフラが接続される。一方、ハウジング１０の端部には
これを通過する空気を温風として自１ｌｌｌＩの暖房用
空気として使用するために入口２が、右端部には出口８
が設けられ、外気が温風ダクト７を通過するうちに加熱
されて、図示してないブロアにより単室へ吹き出される
ようになっている。The left end of the heat medium introduction pipe 4 serves as an inlet, to which an exhaust pipe of the internal combustion engine 1 is connected, while the right end serves as an outlet, to which a muffler is connected. On the other hand, an inlet 2 is provided at the end of the housing 10 to use the air passing therethrough as hot air for heating the housing 10, and an outlet 8 is provided at the right end of the housing 10.
is provided, and as the outside air passes through the hot air duct 7, it is heated and blown out into the single room by a blower (not shown).
第２図に示すように、ＩＪＩダクト７とハウジング１０
との間には断面菊花のように金属板を蛇腹状に折り曲げ
かつハウジング１０に沿って周方向にＩＮ設し、温風ダ
クト７とハウジング１０とに屈曲部を接続して構成され
る。一方、熱媒導入管４の内部にも断面が菊花＠様の受
熱フィン１３が挿入されかつ熱媒導入管４の内壁に溶接
などの適当な手段により結合される。この受熱フィン１
３は第３図に示すように、入口側では受熱フィンの伝熱
面積が小さく、出口９に至るにし・たがって伝熱面積が
次第に大さく構成される。As shown in FIG. 2, the IJI duct 7 and the housing 10
The hot air duct 7 and the housing 10 are formed by bending a metal plate into a bellows-like shape so as to have a chrysanthemum cross section and installing it in the circumferential direction along the housing 10, and connecting the bent portion to the hot air duct 7 and the housing 10. On the other hand, a heat receiving fin 13 having a cross section shaped like a chrysanthemum is inserted inside the heat medium introduction pipe 4 and is connected to the inner wall of the heat medium introduction pipe 4 by suitable means such as welding. This heat receiving fin 1
3, as shown in FIG. 3, the heat transfer area of the heat receiving fins is small on the inlet side, and gradually increases as it reaches the outlet 9.
具体的には、蛇腹状の受熱フィン１３のピッチは同じで
あるが、この屈曲長さく波高に相当するもの）が次第に
出口側はど長くされる。これによって、熱媒導入管４を
通過する熱媒の流速が入口側では速く、出口側では次−
第に遅くなり、熱媒導入管４の周壁を通じて熱発電素子
５へ伝達される熱量が入口側と出口側で（熱媒導入管４
の軸線方向について）はぼ等量とされる。Specifically, the pitch of the bellows-shaped heat receiving fins 13 is the same, but the bent length (corresponding to the wave height) is gradually made longer on the exit side. As a result, the flow rate of the heat medium passing through the heat medium introduction pipe 4 is high on the inlet side, and the flow rate of the heat medium passing through the heat medium introduction pipe 4 is high on the inlet side, and
The amount of heat transferred to the thermoelectric generating element 5 through the peripheral wall of the heat medium introduction pipe 4 becomes slower on the inlet side and the outlet side (heat medium introduction pipe 4
) are assumed to be approximately equal quantities.
換言すれば、熱媒導入管４の入口側では熱媒の温度は高
いが流速が速いので、熱媒導入Ｔ！１４の周壁を通じて
熱発電素子５へ伝達される熱量が制限され、その温度差
は熱発電素子５の許容温度を越えることなく最適な温度
に抑えられる。In other words, the temperature of the heat medium is high on the inlet side of the heat medium introduction pipe 4, but the flow rate is fast, so the heat medium is introduced T! The amount of heat transferred to the thermoelectric generating element 5 through the peripheral wall of the thermoelectric generating element 5 is limited, and the temperature difference therebetween is suppressed to an optimum temperature without exceeding the allowable temperature of the thermoelectric generating element 5.
一方、出口側に至るにしたがって、熱媒の温度は低下す
るが、この流速が受熱フィン１３の流体抵抗により抑え
られるので、単位時間に熱媒導入管４から熱発電素子５
へ伝達される熱量は余り低下しない。On the other hand, the temperature of the heat medium decreases as it reaches the outlet side, but this flow rate is suppressed by the fluid resistance of the heat receiving fins 13, so that the heat medium is transferred from the heat medium introduction pipe 4 to the thermoelectric generating element 5 per unit time.
The amount of heat transferred to is not significantly reduced.
一股に、熱媒導入管４の熱媒ガス流抵抗は高温であるほ
どガスの粘性ないし見掛けの’′ｅ５Ｍが大きいので、
第６図に示すように、熱媒導入管４の入口側では熱媒導
入管４と熱発電素子５との境界温度Ｑは高く、一方、温
風ダクト７の入口岬の温度Ｑは出口側の温度Ｓと余り変
らない。熱媒導入管４の出口側の温度Ｒは熱発電素子５
との熱交換に−より大きく低下する。このような場合で
は、入口側では熱発電素子５の許容温度を越えることが
ある一方、出口側でｉよ温度差が低いために十分な熱発
電能力を発揮し得ない。In short, the heat medium gas flow resistance of the heat medium introduction pipe 4 is as follows:
As shown in FIG. 6, the boundary temperature Q between the heat medium introduction pipe 4 and the thermoelectric generating element 5 is high on the inlet side of the heat medium introduction pipe 4, while the temperature Q at the inlet cape of the hot air duct 7 is high on the exit side. It is not much different from the temperature S of . The temperature R on the outlet side of the heat medium introduction pipe 4 is the temperature R of the thermoelectric generator 5
The heat exchange with - decreases more greatly. In such a case, while the allowable temperature of the thermoelectric generating element 5 may be exceeded on the inlet side, sufficient thermoelectric power generation capacity cannot be exhibited because the temperature difference is lower than i on the outlet side.
これに対して、本発明では第５図に示すように、熱媒導
入管４の内部に取り付けた受熱フィン１３の面積が入口
側で小さく、出口側に至るにしたがって次第に大きくし
たことにより、熱媒導入管４を流れる熱媒の流速が入口
側では速く、出口側では次第に遅くなるので、単位時間
に熱媒導入管４から熱発電素子５へ伝達される伝熱量が
ほぼ均一どなり、第６図に示すように、温風ダクトの入
口側温度Ｐと、出口側温度Ｓとの温度差も低くなる。On the other hand, in the present invention, as shown in FIG. 5, the area of the heat receiving fins 13 attached inside the heat medium introduction pipe 4 is small on the inlet side and gradually increases toward the outlet side. Since the flow rate of the heat medium flowing through the medium introduction pipe 4 is fast on the inlet side and gradually slows down on the exit side, the amount of heat transferred from the heat medium introduction pipe 4 to the thermoelectric generating element 5 per unit time is almost uniform, and the sixth As shown in the figure, the temperature difference between the inlet side temperature P and the outlet side temperature S of the hot air duct also decreases.
このことは熱発電素子５についてこの伝熱面と放熱面と
の温度差が入口側から出口側についてほぼ均一に分布す
ることとなり、最も効率の良い発電能力を発揮すること
ができる。This means that the temperature difference between the heat transfer surface and the heat radiation surface of the thermoelectric generating element 5 is distributed almost uniformly from the inlet side to the outlet side, and the most efficient power generation capacity can be exhibited.
［発明の効果１
本発明は上述のように、外周側に熱発電素子を取り付け
られる熱媒導入管について熱発電素子の入口側では面積
の小さい受熱フィンを導管の内面に取り付け、出口側に
至るにしたがって次第に面積が大きくなる受熱フィンを
取り付けたものであるから、その構成および組付けが簡
単でありながら、熱発電素子へ加えられる温度を入口側
から出口側に亘ってほぼ均一に保つことができるととも
に、熱定′ｉ＠素子の受熱面と放熱面との温度差をもほ
ぼ均一に保つことができ、熱発電素子として効率の最も
高い発電が得られる。そして、受熱フィンの断面が菊花
模様をなすものであるから、熱媒導入管を流れる流体抵
抗にはそれ【よど影響はなく、熱媒導入管へ熱媒を吸引
する送１１１１１１１などの消費電力も少なく抑えるこ
とができる。[Effects of the Invention 1] As described above, the present invention provides a method for attaching heat receiving fins with a small area to the inner surface of the conduit on the inlet side of the thermoelectric generating element for the heat medium introduction pipe to which the thermoelectric generating element is attached to the outer circumferential side, and extending to the outlet side. Since it is equipped with heat receiving fins whose area gradually increases according to At the same time, the temperature difference between the heat-receiving surface and the heat-radiating surface of the thermally constant 'i@ element can be kept almost uniform, and power generation with the highest efficiency as a thermoelectric power generation element can be obtained. Since the cross section of the heat receiving fins has a chrysanthemum pattern, it has no effect on the resistance of the fluid flowing through the heat medium introduction pipe, and the power consumption of the heat transfer 1111111 that sucks the heat medium into the heat medium introduction pipe is also reduced. can be kept to a minimum.
また、熱発電用熱交換器全体としての温度がほぼ均一に
分散されるから、局部的な過熱状態を引き起すこともな
く、長期使用に対して耐久性に富み、熱発電素子として
の安定した発電能力が得られる。In addition, since the temperature of the heat exchanger for thermoelectric power generation as a whole is almost uniformly distributed, it does not cause local overheating, is highly durable for long-term use, and is stable as a thermoelectric generating element. Generating power can be obtained.
なお、受熱フィンには導管の入口側で高温の熱媒に晒さ
れるので、この部分にセラミックなどのコーティングを
施ずようにすれば、一層熱定電用熱交換器としての耐久
性を向上することができる。Furthermore, since the heat receiving fins are exposed to high temperature heat medium on the inlet side of the conduit, the durability of the heat exchanger as a thermostatic heat exchanger can be further improved by not coating this part with ceramic or other materials. be able to.
【図面の簡単な説明】
第１図は本発明に係る熱発電用熱交換器の側面断面図、
第２図は同正面断面図、第３図は同然発電用熱交換器の
断面を異にする正面断面図とその作動を説明する線図、
第４図は熱発電素子の温度特性を示す線図、第５図は本
発明に係る熱媒管に受熱フィンを備えた場合の熱発電素
子の性能を示す縮図、第６図は熱媒導入管に受熱フィン
がない場合の熱発電素子の性能を示す縮図である。
３：人口 ４：熱媒導入管 ５：熱発電素子 ７：温風
ダクト ９：出口
特許出願人 いすず自動中株式会社
代理人 弁理士 山水 俊夫
第１図
第３図
変声１ｔｉ−のシＨ１ｔ 差
第４図
第５図
第 ６ 図[Brief Description of the Drawings] Fig. 1 is a side sectional view of a heat exchanger for thermal power generation according to the present invention;
Fig. 2 is a front sectional view of the same power generation heat exchanger, and Fig. 3 is a front sectional view with a different cross section of the heat exchanger for power generation and a line diagram explaining its operation.
Fig. 4 is a diagram showing the temperature characteristics of the thermoelectric power generation element, Fig. 5 is a miniature diagram showing the performance of the thermoelectric power generation element when the heat medium pipe according to the present invention is equipped with heat receiving fins, and Fig. 6 is a diagram showing the heat medium introduction. It is a microcosm showing the performance of a thermoelectric power generation element when a tube does not have heat receiving fins. 3: Population 4: Heat medium introduction pipe 5: Thermoelectric power generation element 7: Hot air duct 9: Exit Patent applicant Isuzu Jidochu Co., Ltd. Agent Patent attorney Toshio Sanmizu Figure 4 Figure 5 Figure 6
Claims (1)
する受熱フインの面積を小さく、出口側に至るにしたが
つて受熱フインの面積を次第に大きくしたことを特徴と
する熱発電用熱交換器。Thermal power generation characterized in that the area of the heat receiving fins disposed inside the heat medium introduction pipe is small on the inlet side of the heat medium introduction pipe, and the area of the heat receiving fins is gradually increased toward the outlet side. heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60207331A JPH0612223B2 (en) | 1985-09-19 | 1985-09-19 | Vehicle thermoelectric generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60207331A JPH0612223B2 (en) | 1985-09-19 | 1985-09-19 | Vehicle thermoelectric generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6268112A true JPS6268112A (en) | 1987-03-28 |
| JPH0612223B2 JPH0612223B2 (en) | 1994-02-16 |
Family
ID=16537978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60207331A Expired - Lifetime JPH0612223B2 (en) | 1985-09-19 | 1985-09-19 | Vehicle thermoelectric generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612223B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009264277A (en) * | 2008-04-25 | 2009-11-12 | Honda Motor Co Ltd | Pump device with engine |
| WO2015107815A1 (en) * | 2014-01-14 | 2015-07-23 | 株式会社ミクニ | Heat transfer pipe for heat exchanger and heat exchanger |
| CN109341400A (en) * | 2018-11-22 | 2019-02-15 | 方快锅炉有限公司 | A kind of composite boiler heat exchange assistant pipe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6042594A (en) * | 1983-08-18 | 1985-03-06 | Seiichi Konaka | Heat exchanger with fins |
-
1985
- 1985-09-19 JP JP60207331A patent/JPH0612223B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6042594A (en) * | 1983-08-18 | 1985-03-06 | Seiichi Konaka | Heat exchanger with fins |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009264277A (en) * | 2008-04-25 | 2009-11-12 | Honda Motor Co Ltd | Pump device with engine |
| WO2015107815A1 (en) * | 2014-01-14 | 2015-07-23 | 株式会社ミクニ | Heat transfer pipe for heat exchanger and heat exchanger |
| CN109341400A (en) * | 2018-11-22 | 2019-02-15 | 方快锅炉有限公司 | A kind of composite boiler heat exchange assistant pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0612223B2 (en) | 1994-02-16 |
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