Abstract
A desiccant air conditioning system processes sensible and latent heats separately, which improves the ystem efficiency and indoor air quality. A desiccant heat pump system consists of a heat pump and a desiccant otor. To design such a system, the adsorption and desorption characteristics of the desiccant rotors should be nown. In this study, we experimentally investigated the adsorption and desorption characteristics of actual rotors made from mesoporous silica and a polymeric sorption material. The average pore sizes of the esoporous silica were 4 and 2 nm. The materials do not require a high-temperature heat source for regeneration. effects of the air velocity and air temperature on the adsorption and desorption speeds were determined. It as found that the equivalent diffusion coefficients of the sorbent materials were not affected by the air velocity, they decreased with decreasing temperature. The resistance of the mass diffusion in the desiccant rotor as evaluated.
