Two-phase Flow Heat Transfer during R-410A Vaporization in Horizontal Small Tubes
Two-phase flow boiling heat transfer of R-41OA in horizontal small tubes was reported in the present experimental study.The local heat transfer coefficients were obtained over a heat flux range of 5 to 40 kW/m2,a mass flux range of 170 to 600 kg/(m2s),a saturation temperature range of 3 to 10℃,and quality up to 1.0.The test section was made of stainless steel tubes with inner diameters of 0.5,1.5 and 3.0 mm,and lengths of 330,1500 and 3000 mm,respectively.The section was heated uniformly by applying a direct electric current to the tubes.The effects on heat transfer of mass flux,heat flux,inner tube diameter,and saturation temperature were presented.The experimental heat transfer coefficient is compared with six existing heat transfer coefficient correlations.A new boiling heat transfer coefficient correlation based on the superposition model for refrigerant in small tubes was developed with mean deviation of 10.37%.
R-410A Flow boiling Heat transfer coefficient Horizontal small tubes
A.S.Pamitran Kwang-Il Choi Jong-Taek Oh Pega Hrnjak
Graduate School,Chonnam National University,San 96-1,Dunduk-Dong,Yeosu,Chonnam 550-749,Republic of K Department of Refrigeration and Air Conditioning Engineering,Chonnam National University,San 96-1,Du Department of Mechanical and Industrial Engineering,University of Illinois at Urbana-Champaign,1206
国际会议
第六届压缩机与制冷国际会议(The 6th International Conference on Compressor and Refrigeration(ICCR))
西安
英文
486-496
2008-09-25（万方平台首次上网日期，不代表论文的发表时间）