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Two-phase flow of R-134a refrigerant during flow boiling through a horizontal circular mini-channel |
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| Authors: | Sira Saisorn Jatuporn Kaew-On Somchai Wongwises |
| Institution: | a King Mongkut’s Institute of Technology Ladkrabang Chumphon Campus Chumphon 86160, Thailand b Department of Physics, Faculty of Science, Thaksin University, Phattalung 93110, Thailand c Fluid Mechanics, Thermal Engineering and Multiphase Flow Research Lab. (FUTURE), Department of Mechanical Engineering, King Mongkut’s University of Technology Thonburi, Bangmod, Bangkok 10140, Thailand |
| Abstract: | This research focuses on heat transfer to R-134a during flow boiling in a 1.75 mm internal diameter tube. Flow visualisation and heat transfer experiments are conducted to obtain heat transfer coefficients for different flow patterns. The measured data in each flow regime are compared with predictions from a three-zone flow boiling model. The calculations are in fair agreement with the experimental results which correspond in particular to slug flow, throat-annular flow and churn flow regimes under conditions of low heat flux. |
| Keywords: | Flow boiling Mini-channel Flow pattern Heat transfer |
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