Abstract
A simulation on semi-glazed flat plate solar collectors under natural convection mode used for green bell pepper drying has been conducted. The solar collector has a 60% glazed area which was installed to the drying chamber with a 45o slope. The simulation consisted of the heating and drying process. For the heating process, a semi-empirical model of the buoyancy effect and heat balance was proposed. To determine the constants of the model, the non-linear least square method based on the experimental data of irradiation, ambient air temperature and the drying chamber temperature for no-load operation was used. Furthermore, for the drying process simulation was carried out based on the mass and energy balance of the product and the drying air as well as the drying characteristics of green bell pepper. The simulation results showed that in clear weather conditions, the temperature and air flow rate produced by the collector can be used to dry a stack of ten trays within effective time less than 20.6 hours or equal to less than three days sunshine.
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