An analytical investigation of air dehumidification with liquid desiccant is carried out through dimensionless vapor pressure and temperature difference ratios. The performance of the dehumidifier predicted with the simplified model described in this paper shows a very
good agreement with some experimental data available in the literature. It is found that the lower cooling water inlet temperature and the higher heat exchanger effectiveness
increase the rate of moisture removal. The effect of changing the desiccant flow rate on the water condensation rate is more pronounced at low cooling water inlet temperature than at high tc;i. For preliminary design purposes, the simple expression derived in this paper
can be used to estimate the water condensation rate.