STUDY OF THERMAL AND MASS TRANSFER CHARACTERISTICS ON AIR GAP DIFFUSED DESALINATION
In this paper, the diffusion-gap seawater desalination is modeled and analyzed. A mathematical model is established by the conservation of mass and energy. The CFD software is adopted to realize the two-dimensional simulation of water vapor in the air gap. The water evaporate on the evaporator and the vapor diffusion through the air gap, condense on the condenser. The appropriate simplification and user-defined functions were used to assist the study. A steady-state numerical simulation of the water vapor diffusion process in the air gap is carried out and the model height is 0.5 m, air gap width is 5 mm and the flow rate is 0.005 kg/s; by the distribution of temperature, pressure, water vapor concentration in the air gap, it is conducive to know the microscopic flow within the air gap.