2成分混合媒体を用いたヒートパイプにおける凝縮特性の数値解析

概要

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A numerical analysis has been made on a reflux condensation of binary vapor (R 113+R 11) in a two-phase closed thermosyphon in order to predict its variable conductance behavior and to clarify the detailed mechanism. The flow, and heat-and-mass transfer in the vapor phase and the condensate liquid film were solved simultaneously for the axisymmetric two-dimensional field in a circular pipe. It was shown that, in the case of smaller heat load, non-condensing region is formed in the upper part of the condensing section due to the accumulation of more volatile component of vapor (R 11) , and the length of the non-condensing region increases with the decrease of heat load. As the result, the temperature difference between the inlet vapor and the condensing wall is kept nearly constant for varying heat load. The calculated temperature difference and system pressure were compared with experimental data, and reasonable agreements were obtained.
社団法人日本機械学会の論文
1994-12-25