Results of tomato drying in a greenhouse type solar dryers with natural convection

In this work, the process of drying tomato products using two types of polyethylene as a transparent surface in natural convection solar dryers operating in direct heat transfer mode was studied. Traditional ordinary polyethylene and functional ceramic composite polyethylene based on mullite Al6Si2O13, designed for solar dryers that convert sunlight into infrared pulses, were used as transparent coatings. In functional ceramic composite polyethylene solar dryers, high-energy pulsed radiation energy allows to penetrate deep layers of dried products and evaporate water. This will cause excess moisture to remain in the product to be dried.