Mathematical Modeling and Parametric Study of an Indirect- type Solar Dryer

This study aims to present a comprehensive mathematical model for study of an indirect–type solar dryer. For this purpose, using the conservation laws of heat and mass and the physical principles of the performance of such systems, the governing equations related to the solar collector and the fixed–bed dryer are developed in the unsteady state condition. The governing equations are solved numerically. The effect of some structural and operating parameters of the solar dryer is studied on its performance. Furthermore, the drying efficiency of the dryer is determined in various conditions. The obtained results are well adapted with the expectations of the conservation laws and the physical principles of such systems.