ABSTRACT In this paper, an experimental device for falling film dehumidification of circular tube is established. The effects of desiccant inlet concentration(30-40), velocity(0.01–0.06 m/s), temperature(26–36°C) and air inlet velocity(0.7–1.2 m/s), temperature(26–36°C) and moisture content (15–25?g/kg) on heat and mass transfer dynamic process and the internal detailed temperature, velocity were investigated by experiments and CFD model. The results show that the CFD simulation is in good agreement with the experimental results, with an average error of 4. Then, the heat and mass transfer and desiccant flow process inside the dehumidifier are analyzed.
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