An experimental study of R-113 film condensation on horizontal integral-fin tubes

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910451· OSTI ID:5199052

Marto, P J; Zebrowski, D; Wanniarachchi, A S ^[1]; Rose, J W ^[2]

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1. Naval Postgraduate School, Monterey, CA (USA)
2. Univ. of London (England)

Heat transfer measurements were made at near-atmospheric pressure on a smooth tube, on 24 integral-fin tubes having machined, rectangular-shaped fins, and on a commercial integral-fin tube. All tubes were made of copper. The vapor flowed vertically downward with a nominal velocity of 0.4 m/s. Vapor-side heat transfer coefficients were determined with a typical uncertainty of {plus minus}7% using a modified Wilson plot technique. The vapor-side heat transfer coefficient of the integral-fin tubes (based upon the outside surface area of the smooth tube) was enhanced considerably more than the surface area enhancement provided by the fins. Heat transfer enhancements (for the same vapor-to-wall temperature difference) up to around 7 were measured for a corresponding area enhancement of only 3.9. The optimum fin spacing was found to lie between 0.2 and 0.5 mm, depending upon fin thickness and height. The data were compared with those of other investigations and with several existing theoretical models. Visual observations of condensate drainage patterns from the finned tubes were also made.

• OSTI ID: 5199052
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 112:3; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
DATA
ENERGY TRANSFER
EXPERIMENTAL DATA
FILM CONDENSATION
FILMS
FINS
HEAT TRANSFER
INFORMATION
NUMERICAL DATA
SURFACE PROPERTIES
SURFACE TENSION
TUBES
VAPOR CONDENSATION