**2. Literature Review**

The losses of fruit and vegetables are in the order of 40%, and under extremely hindering circumstances, they are as high as 80% [1]. A major percentage of losses is either due to inaccurate or early drying of natural product chips (banana, mango, apple, etc.) [2]. The indirect passive solar drying system was designed and built using convective heat flow principles [3]. For the selected plants, a direct correlation between item temperature and drying rate was postulated. The proposed experimental relationship can depict the drying energy of the picked crops well [4]. The cost of dehydrating chili per kilogram was reduced by 39% in the case of a double-pass solar drier [5]. In the indirect solar dehydrator, the incoming air is heated using solar energy in a separate solar receiver and sent to the drying chamber. A consistent condition of evaporation is maintained with the flow of heat [6].
