Experimentation on Solar Dryer for Agricultural Products: A Review

Drying is a critical process for the preservation of agricultural products by decreasing moisture content. The food industry accounts for 25%–30% of greenhouse gas emissions, exacerbated by the climate crisis. The food sector is increasingly utilising renewable sources, such as solar energy, to enhance sustainability and address existing challenges. To attain significant advancement, the sector must implement focused strategies and technological innovations. This review paper summarises recent advancements in solar drying systems, focusing on different configurations established through experimental research. The objective is to aid researchers in selecting appropriate solar dryer designs for their experimental studies. The scope of this review article is focused on the experimentation of various kinds of solar dryers. The typical range of drying efficiencies was 16.73%–69.6%, while the typical drying temperatures and times were 29%–60% and 12 h, respectively.