単一冷媒水平溝付管内凝縮熱伝達率の予測手法(熱工学,内燃機関,動力など)

概要

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The condensation heat transfer coefficients of pure refrigerants in horizontal micro-fin tubes were predicted by solving the modeled equations. In the model, film condensation on the inner fins was estimated from the total unwetted area, while the forced convection condensation heat transfer coefficient of the liquid film was set to be equal to that of the smooth tube. The predicted results showed good agreement with the experimental results, and it was shown that effects of the parameters that characterize the micro-fin tube, i. e., pipe diameter, fin height, fin pitch and fin tip angle, were well predicted. Furthermore, the high heat transfer coefficient was reproduced in the high-quality range using the present model, which assumes that the liquid phase is distributed in the valley between the grooves in this region.
一般社団法人日本機械学会の論文
1997-07-25