| Title |
External Condensation Heat Transfer Coefficients of R1234yf |
| Authors |
박기정(Ki-Jung Park) ; 이철희(Cheol-Hee Lee) ; 강동규(Dong Gyu Kang) ; 정동수(Dongsoo Jung) |
| Keywords |
응축 열전달 ; 대체냉매 ; 열전달계수 ; 냉매134a ; 냉매1234yf Condensation heat transfer ; Alternative refrigerant ; Heat transfer coefficients ; R134a ; R1234yf |
| Abstract |
In this study, external condensation heat transfer coefficients(HTCs) of R134a and R1234yf are measured on a plain, low fin, and Turbo-C tubes at the saturated vapor temperature of 39℃ with the wall subcooling of 3～8℃. R1234yf is a new alternative refrigerant of low greenhouse warming potential for replacing R134a which is one of the greenhouse gases controlled by Kyoto protocol and is used extensively in mobile air-conditioners. Test results show that the external condensation HTCs of R1234yf are very similar to those of R134a for all three surfaces tested. For the application of condensation heat transfer correlations to the design of condensers charged with R1234yf, thorough property measurements are needed for R1234yf in the near future. |