FILM CONDENSATION OF HCFC-22 ON HORIZONTAL ENHANCED TUBES

Experiments were conducted to study the condensation heat transfer cha racteristics of horizontal enhanced tubes. In the current experiment, six different enhanced tubes, including 26, 40 fpi low fin tubes and f our three-dimensional-fin tubes, were tested. The working fluid used i n the experiment was HCFC-22. Data were presented in the form of overa ll heat transfer coefficient at three working pressures, namely 1.32, 1.47 and 1.62 Mpa. In addition, the condensing heat transfer coefficie nts for the test tubes were obtained from the Wilson plot technique.