Condensation of R-134a Vapor over Single Horizontal Circular Integral-Fin Tubes with Trapezoidal Fins

An experimental investigation has been carried out for the condensation of R-134a vapor on four single horizontal circular integral-fin tubes (CIFTs) made of copper. The fins are of trapezoidal shape and the fin density of these tubes has been varied systematically from 934 fpm to 1,875 fpm. All the...

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Bibliographic Details
Published inHeat transfer engineering Vol. 21; no. 2; pp. 29 - 39
Main Author Ravi Kumar, H. K. Varma, Bikash Mohanty, K. N. Agrawal
Format Journal Article
LanguageEnglish
Published Philadelphia, PA Informa UK Ltd 01.03.2000
Taylor & Francis
Subjects
Applied sciences
AUGMENTATION
CHLOROFLUOROCARBONS
COPPER
EFFICIENCY
Energy
ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
Energy. Thermal use of fuels
ENVIRONMENTAL SCIENCES
Exact sciences and technology
FINS
HEAT TRANSFER
REFRIGERANTS
Refrigerating engineering
Refrigerating engineering. Cryogenics. Food conservation
TUBES
VAPOR CONDENSATION
Geometry
Finned tube
Heat transfer coefficient
Experimental study
Horizontal tube
Condensation
Refrigerant fluid
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Summary:An experimental investigation has been carried out for the condensation of R-134a vapor on four single horizontal circular integral-fin tubes (CIFTs) made of copper. The fins are of trapezoidal shape and the fin density of these tubes has been varied systematically from 934 fpm to 1,875 fpm. All the experimental data have been acquired at the saturation temperature of 312.4 +/- 0.5 K. The CIFT with 1,560 fpm fin density has been found to be the best-performing tube, as it has provided an enhancement factor (EF) of the order of 5.6. The experimental results are in the best agreement with Honda and Nozu model. This model has predicted 80% of the experimental results in a range of 0-30%.
Bibliography:NONE
ISSN:0145-7632
1521-0537
DOI:10.1080/014576300271004