2成分蒸気の強制対流凝縮に関する研究 : 第2報,鉛直および水平凝縮管の管外強制対流凝縮

概要

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The characteristics of forced convective condensation of a binary vapor mixture on vertical and horizontal tubes were experimentally investigated using a R113-R114 mixture for vertical and horizontal vapor flows. A smooth tube and two kinds of finned tubes were used as test condensing tubes. It was concluded from the experimental results that the thermal resistance of a vapor diffusion layer is affected markedly by the turbulence generated by a wavy motion of the condensate liquid film and the fins of the condensing tube. The dependency of he heat-transfer coefficient on the vapor-flow direction and the fin shape of the condensing tube can be explained clearly by considering these effects of turbulence. A prediction equation for the heat-transfer coefficient which is derived from an analogy between heat and mass transfer with consideration to the effects of the turbulence generated at the tube surface can accurately estimate the experimental results.
一般社団法人日本機械学会の論文
1989-10-25