AT-96-12-2 -- Single-Tube Performance of Condensation of R134a on Horizontal Enhanced Tubes PDF

Experiments were conducted to study the condensation heat transfer characteristics of a horizontal enhanced tube. In the current experiment, four different enhanced tubes, including 26- and 40-fpi low-fin tubes and two three-dimensional-fin tubes were tested. The working fluid used in the experiment is refrigerant R134a. Data were presented in the form of heat transfer coefficients in two condensing temperatures, namely, 40.6degC and 45degC. In addition, the Beatty and Katz (1948) gravity drainage model together with a surface drainage model proposed by Rudy and Webb (1983) were compared with the present low-fin data.

KEYWORDS: year 1996, performance, finned tubes, condensation, R134a, refrigerants, horizontal, experiment, heat flow, testing, heat transfer coefficient, comparing