Two-phase flow of R-134a refrigerant during flow boiling through a horizontal circular mini-channel
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Author list: Saisorn S., Kaew-On J., Wongwises S.
Publisher: Elsevier
Publication year: 2011
Journal: Experimental Thermal and Fluid Science (0894-1777)
Volume number: 35
Issue number: 6
Start page: 887
End page: 895
Number of pages: 9
ISSN: 0894-1777
eISSN: 1879-2286
Languages: English-Great Britain (EN-GB)
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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. ฉ 2011 Elsevier Inc.
Keywords
Mini-channel
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