| Title |
Pool Boiling Heat Transfer Coefficients of R1234yf on Various Enhanced Surfaces |
| Authors |
이요한(Yohan Lee) ; 강동규(Dong Gyu Kang) ; 서훈(Hoon Seo) ; 정동수(Dongsoo Jung) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2013.25.3.143 |
| Keywords |
풀 비등 열전달계수 ; 냉매 1234yf ; 낮은 핀 표면 ; Turbo-B 촉진 표면 ; Turbo-C 촉진 표면 ; Thermoexcel-E 촉진 표면 Pool boiling heat transfer coefficient ; R1234yf ; Low-fin surface ; Turbo-B enhanced surface ; Turbo-C enhanced surface ; Thermoexcel-E enhanced surface ; |
| Abstract |
In this work, nucleate pool boiling heat transfer coefficients (HTCs) of R134a and R1234yf are measured, on flat plain, 26 fpi low fin, Turbo-B, Turbo-C and Thermoexcel-E surfaces. All data are taken at the liquid pool temperature of 7℃, on a small square copper plate (9.53 mm×9.53 mm), at heat fluxes from 10 kW/m2 to 200 kW/m2, with an interval of 10 kW/m2. Test results show that nucleate boiling HTCs of all enhanced surfaces are greatly improved, as compared to that of a plain surface. Nucleate pool boiling HTCs of R1234yf are very similar to those of R134a, for the five surfaces tested. |