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Flow Boiling of R-123/Oil Mixture in a Plain Tube Bundle  

Lee, Jin-Wook (Graduate School of Mechanical Engineering, University of Incheon)
Lee, Jae-Ho (Graduate School of Mechanical Engineering, University of Incheon)
Kim, Nae-Hyun (Department of Mechanical Engineering, University of Incheon)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.22, no.10, 2010 , pp. 704-709 More about this Journal
Abstract
The effect of oil on flow boiling of R-123 in a plain tube bundles was experimentally investigated for a range of quality and heat flux. It is shown that the heat transfer coefficient decreased as the oil concentration increased. Comparison with the previous pool boiling data reveals that the reduction of heat transfer coefficient by oil is more pronounced in pool boiling, and the difference increased with the increase of oil concentration and heat flux. Within the experimental range, the variation of mass flux or quality has negligible effect on the heat transfer coefficient.
Keywords
Oil; R-123; Flow boiling; Plain tube; Tube bundle;
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