The liquid desiccant system was modified to simulate adiabatic operation and coupled to the drying modified to simulate adiabatic operation and coupled to the drying model and the new system gave much better results, but its use for grain drying was predicted to be economically unfeasible. An adsorption unit of silica gel was designed by Hodali and Bougard and integrated in a crop solar drying installation, consisting of a direct flat-plate forced convective solar dryer connected with a similar solar collector. The daily sorption cycle of the desiccant unit was first investigated and a suitable coupling of the collector, the dryer and the adsorption unit were selected and numerically simulated and applied to the drying of apricots in Morocco under real climatic conditions.