F213 冷媒HCFC123の細管内強制対流沸騰(次世代冷凍空調技術に関わる伝熱過程I)

概要

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This paper is an experimental investigation on forced convective boiling of a refrigerant HCFC123 in a mini-tube. Pressure drops and heat transfer coefficients were measured for the inner diameter, D=0.3mmin. These data were compared with those for D=0.51mm. Ranges of the experimental parameters are as follows: the mass flux G=150-300 kg/m^2s, the heat flux q=10-30 kW/m^2, the vapor quality x= 0.06-1.0. Although both frictional pressure drops for D=0.51mm and 0.3mm were lower than the correlation for the conventional tubes, their characteristics were qualitatively in accordance. The heat transfer coefficients for D=0.51mm increased with the heat flux, but were almost independent of mass flux. The heat transfer coefficients for D=0.3mm were higher than those for D=0.51mm, and almost independent of heat flux.
一般社団法人日本機械学会の論文
2009-11-06