Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Pool Boiling Heat Transfer Coefficients of R1234yf on Various Enhanced Surfaces

열전달 촉진 표면에서 R1234yf의 풀 비등 열전달계수

  • Lee, Yohan (Department of Mechanical Engineering Graduate School, Inha University) ;
  • Kang, Dong Gyu (Department of Mechanical Engineering Graduate School, Inha University) ;
  • Seo, Hoon (Department of Mechanical Engineering Graduate School, Inha University) ;
  • Jung, Dongsoo (Department of Mechanical Engineering, Inha University)
  • 이요한 (인하대학교 기계공학과 대학원) ;
  • 강동규 (인하대학교 기계공학과 대학원) ;
  • 서훈 (인하대학교 기계공학과 대학원) ;
  • 정동수 (인하대학교 기계공학과)
  • Received : 2012.05.22
  • Published : 2013.03.10
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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 $7^{\circ}C$, on a small square copper plate ($9.53mm{\times}9.53mm$), at heat fluxes from $10kW/m^2$ to $200kW/m^2$, with an interval of $10kW/m^2$. 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.

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