多段水平管上を流下する臭化リチウム水溶液膜への水蒸気の吸収実験

概要

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The absorbers of absorption chillers consist of horizontal tube banks, over the outer surfaces of which absorbent flows and inside of which cooling water runs. The dependence of the distribution of absorption rate on the position of the pipes is important but has not been studied so far. In this work, the cases of one to three pipes are studied experimentally in the range of film Reynolds number between 5 and 40. Three different surfaces are tested to study the effect of wettability, Numerical calculations are also performed using the method proposed in our previous paper. The highest absorption rates are obtained for the pipes with higher knurls, and their distributions agree with the numerical predictions. The pipe position which shows the maximum absorption rate varies with flow rate but the maximum absorption rate does not vary greatly with flow rate. The heat transfer coefficient is minimum and almost constant with flow rate at the top pipe. At lower pipes it becomes larger, but tends to decrease with increasing flow rate.
一般社団法人日本機械学会の論文
1996-06-25