Abstract
We have studied adsorption/desorption behavior of water vapor in a desiccant rotor by means of computer simulation to clarify the operating and design concept of desiccant rotor. First, mass transfer coefficient in mathematical model was derived from curve-fitting with a lot of experimental results and it was related to cycle time by applying the penetration theory. Four types of adsorption isotherm were selected to investigate the influence of shape of adsorption isotherm on the dehumidifying performance. It was found that appropriate shapes of adsorption isotherm existed at each regeneration temperature. Moreover, it was expected to reduce the length of desiccant rotor considerably by selecting appropriate shape of adsorption isotherm since water vapor was adsorbed in a limited part of air flow direction of the rotor when the shape of adsorption isotherm risen sharply at a suitable value of relative humidity was used.
