Review Paper of Study on Solar Dryer

Abstract

This paper presents the state of various kinds of solar dryers that are widely used today and about drying process that has been perform during drying of various food products and percentage containing moisture in different food products. The indirect, direct and mixed mode dryers that have shown potential in drying agricultural products in the tropical and subtropical countries are discussed. A side from identifying the active and passive mode solar dryers, we also highlight the environmental influence on solar energy (harnessing) that plays a vital role in the solar drying sector and says that the indirect solar dryer is more suitable than other dryers and recirculation of air in an indirect dryer can reduce the drying time of food product in comparison to normal indirect solar dryers. The dryer having recirculation of air have more efficiency than other dryers