JPH054596B2 - - Google Patents
Info
- Publication number
- JPH054596B2 JPH054596B2 JP57122399A JP12239982A JPH054596B2 JP H054596 B2 JPH054596 B2 JP H054596B2 JP 57122399 A JP57122399 A JP 57122399A JP 12239982 A JP12239982 A JP 12239982A JP H054596 B2 JPH054596 B2 JP H054596B2
- Authority
- JP
- Japan
- Prior art keywords
- working fluid
- heat transfer
- pfh
- transfer device
- section
- 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 - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
(イ) 産業上の利用分野
本発明は作動流体を加熱して蒸発させる再生部
と作動流体を冷却して液化させる凝縮部とを循環
する作動流体の密閉循環系を形成し、再生部で作
動流体に与えられた熱エネルギーを凝縮部から密
閉循環系外へ送り出すようにした熱移動装置に関
するもので、例えば暖房装置として利用できるも
のである。
(ロ) 背景技術
此種の熱移動装置には、例えばヒートパイプや
サーモサイフオンがその代表的なものとして知ら
れており、又その作動流体においても水、エタノ
ール、フロン等の種々の物質が従来知られてい
る。
しかし乍ら、水、エタノール、フロン、水銀、
ナトリウム、セシウム、ペンタン、ヘブタン等を
作動流体とした従来の熱移動装置においては、そ
の作動流体の種類により、高温条件下の熱安定性
の悪いもの、装置の構造材（主として鉄、銅、ア
ルミニウム等の金属材）に対する腐食性の高いも
の、人体に対する毒性や爆発の危険性を有するも
の、凍結点が高く寒冷気候での使用が不適なも
の、或いは高価なものとなる等の様々の欠点があ
る。
また、此種熱移動装置の再生部への熱供給方式
には電気ヒーターによるもの、スチームによるも
の、石油バーナーおよびガスバーナーなどによる
ものがあるが、その中で効率が良く装置を単純で
コンパクトにし得る直火方式が一般に採用され、
この直火方式においては、特に作動流体の高温条
件下での熱安定性、装置の構造材に対する腐食性
および安全性が問題となる。
(ハ) 発明の目的
本発明は上述した従来技術の問題点を解消すべ
くなされたものであり、此種熱移動装置の作導流
体として、高温領域においても熱安定性が良く、
装置の構造材（鉄、銅等の金属）に対する腐触力
が少ない等の物性の有する新規なものを使用し、
直火方式のような高温条件でも安定かつ安全に負
荷への熱供給を行なうことのできる熱移動装置を
提供するものである。
(ニ) 発明の特徴
本発明の特徴とするところは此種熱移動装置の
作動流体としてｎ−パーフルオロヘキサン（以下
ｎ−PFHと略称する。）を採用したことにある。
(ホ) 発明の開示
第１図は本発明が適用される熱移動装置の概略
系統図、第２図、第３図及び第４図は夫々ｎ−
PFHの温度に対する蒸気圧、蒸発潜熱及び液密
度の特性図を示す。
熱移動装置の作動流体として使用するｎ−
PFHの物性については表１に示される。
(B) Industrial Application Field The present invention forms a closed circulation system for working fluid that circulates between a regeneration section that heats and evaporates the working fluid and a condensation section that cools and liquefies the working fluid. This relates to a heat transfer device that sends thermal energy given to a fluid from a condensing section to the outside of a closed circulation system, and can be used, for example, as a heating device. (B) Background art Heat pipes and thermosiphons are known as representative examples of this type of heat transfer device, and their working fluids also contain various substances such as water, ethanol, and fluorocarbons. Conventionally known. However, water, ethanol, CFCs, mercury,
Conventional heat transfer equipment that uses sodium, cesium, pentane, hebutane, etc. as a working fluid may have poor thermal stability under high-temperature conditions, or the structural material of the equipment (mainly iron, copper, or aluminum), depending on the type of working fluid. They have various drawbacks, such as being highly corrosive to metal materials (such as metal materials), being toxic to the human body and at risk of explosion, having a high freezing point and being unsuitable for use in cold climates, and being expensive. be. In addition, heat supply methods to the regeneration section of this type of heat transfer equipment include electric heaters, steam, oil burners, gas burners, etc., but among these, the most efficient and simple and compact equipment. The direct fire method is generally adopted to obtain
In this direct fire method, there are particular problems with the thermal stability of the working fluid under high temperature conditions, the corrosiveness of the structural materials of the device, and safety. (c) Purpose of the Invention The present invention has been made to solve the problems of the prior art described above, and can be used as a working fluid for this type of heat transfer device because it has good thermal stability even in high temperature ranges.
We use new materials that have physical properties such as low corrosive force against the structural materials of the equipment (metals such as iron and copper),
The present invention provides a heat transfer device that can stably and safely supply heat to a load even under high-temperature conditions such as in an open flame method. (d) Features of the Invention The feature of the present invention is that n-perfluorohexane (hereinafter abbreviated as n-PFH) is employed as the working fluid of this type of heat transfer device. (E) Disclosure of the Invention FIG. 1 is a schematic system diagram of a heat transfer device to which the present invention is applied, and FIGS. 2, 3, and 4 are n-
A characteristic diagram of vapor pressure, latent heat of vaporization, and liquid density with respect to temperature of PFH is shown. n- used as a working fluid in heat transfer devices
The physical properties of PFH are shown in Table 1.
【表】
ｎ−PFHは不燃性の物質に属するものであり
直火方式による熱移動装置の作動流体が系外に万
一漏れても火炎となり危険性の少ない作動液であ
る。また、ｎ−PFHは、その凝固点が−86℃で
寒冷気候地においても作動流体の凍結の心配がな
い。その上、常温で液体であるから熱移動装置の
作動流体循環系への充填も容易である。
次にｎ−PFHの銅、鉄、油共存状態における
作動流体として長時間運転可能な最高使用温度を
フロン−22等の弗化炭化水素系作動流体との比較
実験で得たデータを表２に示す。[Table] n-PFH is a non-flammable substance, and even if the working fluid of a heat transfer device using an open flame method leaks out of the system, it will not cause a flame and there is little danger. Furthermore, n-PFH has a freezing point of -86°C, so there is no need to worry about freezing of the working fluid even in cold climates. Moreover, since it is a liquid at room temperature, it is easy to fill it into the working fluid circulation system of the heat transfer device. Next, Table 2 shows the maximum operating temperature at which n-PFH can be used as a working fluid in the coexistence of copper, iron, and oil, obtained from a comparative experiment with fluorinated hydrocarbon-based working fluids such as Freon-22. show.
【表】
弗化炭化水素系作動流体は他の有機化合物に比
較し、安定性に優れているので、サーモサイフオ
ンやヒートパイプの作動流体として用いられてい
る、しかしながら、銅、鉄、油などの共存する条
件下で長時間運転可能な最高温度は表２から明ら
かなように弗化炭化水素系作動流体ではフロン−
22が最高で、150℃未満であるのに対し、本発明
に使用するｎ−PFHは250℃と良好であり、か
つ、ｎ−PFHの純度変化も認められなかつた。
また、ｎ−PFHと共存させた金属の腐食量も少
なく（銅で約0.001mm／年、200℃）、弗化水素の
発生も実験の結果、生じなかつた。
以上のようなｎ−PFHの物性並びに実験によ
る測定データから此種熱移動装置としてｎ−
PFHが好適な作動流体であることに着目し、第
１図に示す熱移動装置（サーモサイフオン）によ
り実験したところ、作動流体は直火式で安定した
密閉循環サイクルを形成し、従来のものより高い
（数％）熱移動の向上を達成し得た。
次にｎ−PFHを作動流体とした熱移動装置の
システムを第１図について説明すると、１は再生
部、２は凝縮部、及び３は貯液部で、これらは配
管４，５および６で接続されて作動流体の密閉循
環系７を形成し、作動流体としてｎ−PFHが使
用されている。
而して、再生部１で加熱された作動流体は蒸発
し、矢印イのように配管４内を通つて凝縮部２に
至る。凝縮部２に至つた作動流体はここで熱エネ
ルギー（蒸発潜熱及び顕熱エネルギー）を系７外
の負荷側に与え、自らは凝縮液化した矢印ロのよ
うに配管５内を流下し、貯液部３及び配管６を経
由して再び再生部１に戻り、作動流体は系７を循
環する。
このようにして、作動流体の熱エネルギーが凝
縮部２から負荷側へ連続的に供給される。
以上のように、本発明は、再生部と凝縮部とを
循環する作動流体の密閉循環系を形成し、再生部
で作動流体に与えられた熱エネルギーを凝縮部か
ら系外へ送り出すようにした熱移動装置におい
て、作動流体にｎ−PFHを用いたものであるか
ら、再生部への熱源供給方式を直火式にしても作
動流体の安定性を長期に亘つて保つことができ、
かつ装置の構造材の腐触も少なく安全であり、装
置全体をコンパクトにすることができ、熱効率が
高く、熱移動特性が優れているとともに、装置の
寿命を長くすることができる。又、ｎ−PFHは
引火したり、燃焼しないので、万一、液漏れが生
じても火災を起こす危険性が少なく、凝固点が−
86.0℃と低く、極寒地での使用も可能であり、家
庭用の暖房装置などに適用して、実用上極めて有
益なものである。[Table] Fluorinated hydrocarbon-based working fluids have superior stability compared to other organic compounds, so they are used as working fluids for thermosiphons and heat pipes. As is clear from Table 2, the maximum temperature at which fluorocarbon-based working fluids can be operated for a long time under the coexistence of CFC-
22 had a maximum temperature of less than 150°C, whereas n-PFH used in the present invention had a good temperature of 250°C, and no change in the purity of n-PFH was observed.
Furthermore, the amount of corrosion of metals coexisting with n-PFH was small (approximately 0.001 mm/year, 200°C for copper), and no hydrogen fluoride was generated as a result of the experiment. Based on the physical properties of n-PFH and experimental measurement data as described above, it is possible to use n-PFH as a heat transfer device of this type.
Focusing on the fact that PFH is a suitable working fluid, we conducted an experiment using a heat transfer device (thermosyphon) shown in Figure 1, and found that the working fluid formed a stable closed circulation cycle using an open flame type, which was different from the conventional one. Higher (several %) heat transfer improvements could be achieved. Next, the system of a heat transfer device using n-PFH as a working fluid will be explained with reference to FIG. They are connected to form a closed circulation system 7 for working fluid, and n-PFH is used as the working fluid. The working fluid heated in the regeneration section 1 evaporates and passes through the pipe 4 as indicated by arrow A to reach the condensation section 2. The working fluid that has reached the condensing section 2 gives thermal energy (latent heat of vaporization and sensible heat energy) to the load side outside the system 7, and flows down inside the pipe 5 as shown by arrow B, where it is condensed and liquefied. The working fluid returns to the regeneration section 1 via the section 3 and the piping 6, and circulates through the system 7. In this way, the thermal energy of the working fluid is continuously supplied from the condensing section 2 to the load side. As described above, the present invention forms a closed circulation system for the working fluid that circulates between the regeneration section and the condensation section, and sends the thermal energy given to the working fluid in the regeneration section from the condensation section to the outside of the system. Since the heat transfer device uses n-PFH as the working fluid, the stability of the working fluid can be maintained over a long period of time even if the heat source supply method to the regeneration section is a direct fire type.
Furthermore, the apparatus is safe with less corrosion of structural materials, the entire apparatus can be made compact, the thermal efficiency is high, the heat transfer characteristics are excellent, and the life of the apparatus can be extended. In addition, n-PFH does not catch fire or burn, so even if a liquid leaks, there is little risk of a fire, and its freezing point is -
The temperature is as low as 86.0℃, which means it can be used in extremely cold regions, making it extremely useful in practical applications such as home heating equipment.
図は何れも本発明の一実施例に関するものであ
り、第１図は熱移動装置の概略系統図、第２図、
第３図及び第４図は夫々、本発明で使用するｎ−
PFHの温度に対する蒸気圧、蒸発潜熱及び液密
度の特性図である。
１……再生部、２……凝縮部、７……密閉循環
系。
The figures are all related to one embodiment of the present invention, and FIG. 1 is a schematic system diagram of a heat transfer device, FIG.
FIGS. 3 and 4 respectively show n-
FIG. 3 is a characteristic diagram of vapor pressure, latent heat of vaporization, and liquid density with respect to temperature of PFH. 1... Regeneration section, 2... Condensation section, 7... Closed circulation system.
Claims (1)
流体を冷却して液化させる凝縮部とを循環する作
動流体の密閉循環系を形成し、再生部で作動流体
に与えられた熱エネルギーを凝縮部から密閉循環
系外へ送り出すようにした熱移動装置において、
作動流体がｎ−パーフルオロヘキサンで成ること
を特徴とする熱移動装置。1 A closed circulation system for working fluid is formed that circulates between a regeneration section that heats and evaporates the working fluid and a condensation section that cools and liquefies the working fluid, and the thermal energy given to the working fluid in the regeneration section is transferred to the condensation section. In a heat transfer device that sends heat from the air to the outside of the closed circulation system,
A heat transfer device characterized in that the working fluid consists of n-perfluorohexane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12239982A JPS5912288A (en) | 1982-07-14 | 1982-07-14 | Heat-transferring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12239982A JPS5912288A (en) | 1982-07-14 | 1982-07-14 | Heat-transferring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5912288A JPS5912288A (en) | 1984-01-21 |
| JPH054596B2 true JPH054596B2 (en) | 1993-01-20 |
Family
ID=14834825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12239982A Granted JPS5912288A (en) | 1982-07-14 | 1982-07-14 | Heat-transferring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5912288A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0670300U (en) * | 1993-03-09 | 1994-09-30 | 山形カシオ株式会社 | Mounter nozzle |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS648374U (en) * | 1987-07-01 | 1989-01-18 | ||
| JP2644372B2 (en) * | 1989-02-02 | 1997-08-25 | 古河電気工業株式会社 | Electric insulation type heat pipe cooler |
| JP2726542B2 (en) * | 1990-03-14 | 1998-03-11 | 古河電気工業株式会社 | Hydraulic fluid for heat pipe |
| JP5062172B2 (en) | 2006-04-06 | 2012-10-31 | 旭硝子株式会社 | Working fluid for latent heat transport device and method of operating latent heat transport device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58122981A (en) * | 1982-01-19 | 1983-07-21 | Sanyo Electric Co Ltd | Heat transfer equipment |
-
1982
- 1982-07-14 JP JP12239982A patent/JPS5912288A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0670300U (en) * | 1993-03-09 | 1994-09-30 | 山形カシオ株式会社 | Mounter nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5912288A (en) | 1984-01-21 |
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