Heat-transfer performance of corrugated-tube thermosiphons. Part 2; Condenser performance

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Heat Transfer - Japanese Research; (United States)

OSTI ID:6068073

Hirashima, M; Nishikawa, Y; Taguchi, M ^[1]; Negishi, K ^[2]; Kaneko, K ^[3]; Matsuoka, T ^[4]

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1. Takuma Research and Development Co., Ltd. (JP)
2. Tokyo Metropolitan Inst. of Technology (JP)
3. Univ. of Osaka Prefecture (JP)
4. Nissan Motor Co., Ltd. (JP)

A two-phase closed thermosiphon made of a corrugated tube was developed to extend the application field of heat pipes. In the first paper, the thermal performance of the evaporator section was examined with the thermosiphons set vertical or tilted. The paper describes the thermal performance of the condenser section. A condensation heat-transfer coefficient is proposed as a function of Nusselt's theory modified by three parameters: the Lockhart--Martinelli parameter to consider the effect of vapor flow on the condensing surface, and two new parameters concerned with the effects of the inclination angle of the thermosiphon and the fill charge ratio of the working fluid. The former parameter has a linear relation with the condensation heat-transfer coefficient, and the latter two have a quadratic relation.

• OSTI ID: 6068073
• Journal Information: Heat Transfer - Japanese Research; (United States), Journal Name: Heat Transfer - Japanese Research; (United States) Vol. 20:2; ISSN HTJPA; ISSN 0096-0802
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CALCULATION METHODS
CONDENSERS
DESIGN
ENERGY TRANSFER
FLUID FLOW
FLUIDS
HEAT TRANSFER
NUSSELT NUMBER
PERFORMANCE TESTING
STEAM CONDENSERS
TESTING
THERMOSYPHONS
TUBES
TWO-PHASE FLOW
VAPOR CONDENSERS
WORKING FLUIDS