A Review Paper on Solar Greenhouse Dryer

Abstract

Drying process is done for removing the moisture content from the product. Recently, development of greenhouse dryers, namely, solar tunnel dryer, solar tent dryer, improved solar tunnel dryer, and roof type even span solar greenhouse dryer has been studied by various researchers. In this paper, hothouse dryer below natural convection type and forced convection type are studied. Greenhouse dryer gives a very high quality product than open sun drying and it reduces the crop losses. It has been observed that use of greenhouse dryer under forced convection reduces moisture content in a very less time as well as drying rate is very fast and relative humidity is less than natural convection mode.