SUMMARYThe present paper investigates moisture migration in a thin porous bed filled with unconsolidated sand, unsaturated with water, and examines its cooling effect by water evaporation when used as a cooling device for room air-conditioning. An analytical model has been developed to simulate heat and moisture transport phenomena numerically and calculate the evaporation rate of water on which its cooling performance is dependent. For the case of a horizontal thin bed problem, with very small height and a relatively larger surface that is exposed to atmosphere air, one-dimensional, steady-state computation results have been obtained by focusing on the influence of ambient and operating conditions on the physical quantity fields in the porous packed bed.
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