ABSORPTION OF WATER-VAPOR INTO FALLING FILMS OF AQUEOUS LITHIUM BROMIDE

In this study, experiments have been performed for water vapour absorp tion into 50 and 60 mass % aqueous lithium bromide solution films flow ing down a vertical surface to investigate the effects of liquid diffu sivity values, molecular properties of the concentrated solutions and non-absorbable gases. The experimental results for wavy films over a f ilm Reynolds number range of 15-90 indicate larger dimensionless mass transfer rates than for strictly laminar flow when the diffusivity of water in a concentrated lithium bromide solution is less than that in a dilute solution. The complete set of results shows that the physical property data for lithium bromide solutions including the diffusiviti es measured by Kashiwagi(1) are sufficient to explain mass transfer be haviour.