Fabrication of Temperature Controlled Solar Dryer

The solar drying system utilizes solar energy to heat up the air and to dry any food substance loaded, which is beneficial in reducing wastage of agricultural product and helps in the preservation of the agricultural product. Based on the limitations of the natural Sun drying e.g. exposure to direct Sunlight, liability to pests and rodents lack of proper monitoring, and the escalated cost of the mechanical dryer, a solar is therefore developed to cater for this limitation. This book presents the design, construction, and performance of a solar dryer for food preservation with the temperature control system. In the dryer, the heated air from a separate solar collector is passed through a set of the net which is heated by solar energy, and at the same time, the temperature sensors sense the temperature which is inside the area of the heating block and sends data towards the controller. If the temperature is insufficient for drying of food, then the controller will start the heater and it will go on increasing. If the temperature goes beyond the temperature of specific food then the heater will off automatically and it will save the waste of energy and food from over-drying.