Recent developments in greenhouse solar drying: A review

The world is moving towards the reduction of dependency on fossil fuels. Various innovations are undergoing to make the use of sources of renewable energy like wind, solar, tidal etc. Among these sources, solar energy is available in enormous quantity and best option that may be used for space heating and generation of electric energy. For drying agricultural and non-agricultural products, solar energy can be used directly or indirectly. But in open sun drying the products are affected by external calamities such as rain, insects and animals. To overcome the shortcomings of open sun drying various greenhouse solar dryer had been proposed so far. Some of recent researches have been discussed in the paper. This paper provides the data of already developed greenhouses so the reader can develop new and modified the greenhouse structure. To accomplish this, various researches of recent years have been studied and presented in this review.