Publisher : The Korean Society of Mechanical Engineers
DOI : 10.22634/KSME-B.19220.127.116.114
Title & Authors
The characteristics of heat transfer coefficient for falling-film evaporation on a horizontal tube with aqueous LiBr solution Ji, Yong-Hae;
Falling-film evaporation experiments for aqueous solution of lithium bromide (LiBr) were performed on a horizontal smooth 19.05-mm-dia copper tube. Average heat transfer coefficients were obtained with varied film Reynolds numbers, system pressures, LiBr concentrations and degrees of wall superheat. Heat transfer coefficients increase with increasing system pressure and decreasing concentration. For degrees of wall superheat, the heat transfer coefficient did not't show the distinct trend. For this experimental ranges, heat transfer coefficients showed maximum values at an optimal film Reynolds number. The results of this work were compared with pool boiling data reported previously, and it was shown that the heat transfer performance is superior to the pool boiling.
Falling-Film Evaporation;Evaporation Rate;Heat Transfer Coefficient;Film Reynolds Number;Rool Boiling;