Abstract
Desiccant air-conditioning system is an energy saving system, because it can use waste heat and solar energy to regenerate desiccant rotor. In this study, regeneration of desiccant rotor with direct heating by concentrated solar energy was examined. Experiment of regeneration by heater confirmed basic performance of the desiccant rotor. In the experiment of regeneration by concentrated solar energy using a Fresnel lens, relationship between the irradiance and the performance of dehumidification was clarified. Comparison of regeneration performance between them indicates that direct solar irradiance of 800W/m^2 results in the similar regeneration capability to that of conventional heating.