| Title |
Condensing Heat Transfer Characteristics of Propylene Refrigerant |
| Keywords |
Propylene ; 프로필렌 ; Condensation ; 응축 ; Heat transfer coefficient ; 열전달계수 ; Natural refrigerant ; 자연냉매 |
| Abstract |
This paper deals with the heat transfer characteristics of R-1270(Propylene), R-600a(Iso-butane) and R-290(Propane) as an environment friendly refrigerant and R-22 for condensing. The experimental apparatus has been set-up as a conventional vapor compression type heat pump system. The test section is a horizontal double pipe heat exchanger. A tube diameter of 12.70mm with 1.32mm wall thickness is used for this investigation. The test results showed that the local condensing heat transfer coefficients of hydrocarbon refrigerants were higher than that of R-22. The average condensing heat transfer coefficient was obtained with the maximum value in R-1270 and the minimum one in R-22. Comparing the heat transfer coefficient of experimental results with that of other correlations, the presented results had a good agreement with the Cavallini-Zecchin's correlation. It reveals that the natural refrigerants can be used as substitute for R-22. |