層流で流下する臭化リチウム水溶液への水蒸気吸収特性 : 吸収量に及ぼす物性値変化と入口膜厚の影響

概要

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Numerical computations were carried out to determine the mass transfer for the absorption of low pressure water vapor into an aqueous lithium bromide film flowing down a constant temperature vertical flat plate. The film is assumed to be laminar and the velocity profile fully developed. In the current study, the selected operating parameters are expected to be present in the absorbent of an absorption refrigerating machine. The results are summarized as follows : (1) The total absorption mass flow rate over a certain length of the plate takes a maximum value at a certain entrance film thickness. (2) With an increase in the system pressure, entrance concentration and Lewis number, the total absorption mass flow rate is augmented. (3) The total absorption mass flow rate under conditions where variations of the solution properties occur is slightly lower than that of the constant properties.
一般社団法人日本機械学会の論文
1987-10-25