Comparison of Vapor Condensation Heat Transfer Coefficients of R-600a Over a Smooth Tube and Integral Fin-tube of 28 fpi

摘要

In this study, condensation heat transfer coefficients of refrigerant R-600a (iso-butane) over a single horizontal smooth tube of diameter 19 mm and integral finned tube of 28 fins per inch (fpi) were measured at 39 ℃ vapor temperature with different wall sub-cooling temperatures. All data taken at vapor temperature of 39 ℃ with wall subcooling of 3-8 ℃ on a plain tube of 19 mm outside diameter and integral finned tube of 28 fpi were compared to see how the surface tension drainage mechanism would enhance the heat transfer characteristics of outside condensation of vapor. Based upon the Data taken in this study, different graphs were plotted varying different parameters to show their dependency on other parameters. All data were compared with different models to validate the experimental results.