• ARUNA SEERVI
• TAPASVI SINGH GEHLOT
• Dr P M MEENA

The main objective of this seminar is to give an overview of solar dryer and their classification along with a review of relevant studies conducted in the several years over solar dryer. In this paper we discuss about a technique which is used for removing moisture from wet product is called solar dryer. The demand of consumable best quality of dried product keeps on increasing due to high population density and automation. Solar radiation denotes the most vital factor of dryer output, but some weather-related factors such as solar intensity, wind speed and environment temperature cannot be controlled. So many investigators have studied the effect of solar radiation on dryer yield and their outcomes show that solar dryer productivity increases with increasing incident solar radiation. The solar dryers are designed or tested for preservation of food, vegetable, fruits, grains for long time with best quality. Solar dryer prevent the product from contaminated by acid rain, birds, rodents, insects, fungi’s. In open sun drying, UV rays coming from sun discolored the crop and reduce the market value of crop. The color, flavor, and time required for drying is favorable in solar drying as compared to open drying. The objective of this study is to find out dryer performance under free and forced circulation modes of drying of agricultural products in the tropical and subtropical countries are discussed. Modification of solar dryer based on absorber plate angle with sun radiation, absorbing plate materials and energy storing materials such as gravel, black rubber, packed layer, phase change material and charcoal materials. Many researcher increase surface area of solar dryer absorber plate using ‘v’ groove collector, double fines to increase absorber plate area. It shows that the solar dryer productivity affected by many factor so productivity and efficiency of solar dryer were improved by researchers using different investigations. This review paper represented the correlated technologies that help to improve presented solar dryers.

Natural convection; Forced convection; solar air collector; Evaporation; Solar dryer modification.

"PERFORMANCE ENHANCEMENT OF SOLAR DRYER: A REVIEW", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.283-290, June 2019, Available :http://www.jetir.org/papers/JETIR1906Q39.pdf

"PERFORMANCE ENHANCEMENT OF SOLAR DRYER: A REVIEW", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp283-290, June 2019, Available at : http://www.jetir.org/papers/JETIR1906Q39.pdf