“A Review: Development and trends in solar drying technologies”
Keywords:
Active solar dryer; Passive solar dryer; Direct solar dryer; Indirect solar dryer; open sun drying.Abstract
Drying is one of the best methods to preserve agricultural products for long time but it
requires lot of energy. As availability of electricity per capita in developing and under developed
countries is very less, thus the electricity uses for heating purpose cannot be economically and
environmentally justified option. So, entrapment of thermal energy from solar radiation may be
the best option for drying. Solar energy can be utilized for drying in different ways namely open
sun drying and closed drying (direct and indirect). Open sun drying have various disadvantages
like contamination of dust particles, bacteria in crop, after drying etc. To overcome these problems
greenhouse drying or closed drying has been developed. This review is an attempt to explore
different types of drying systems was developed across the world
