THERMAL EFFICIENCY OF SOLAR DRYERS WITH FLOW-THROUGH AIR SOLAR COLLECTORS

The article discusses the design features and modes of operation of the air solar collector. The dependence of the coolant parameters on the design features of the collector is shown. The article also discusses the design features and modes of operation of the air solar collector. The objective of this work is to create a solar collector that reduces the emission of solar radiation and increases the temperature of the coolant. The collector glass, the surface of which is made in the form of hemispherical cells, concentrates the solar radiation incident on it on the ray-receiving surface of the metal plate. This provides heating of the radiation-receiving surface of the plate and the tubes in contact with it, and, consequently, the heat carrier passing through the tubes up to 2500C. Reducing the emission of solar radiation is also carried out due to the increased radiation reflectivity of the lower side of the metal plate. The article also shows the mathematical modeling of drying hydropleural materials, such as raw cotton, cocoon, flax, the heat capacity of air fiber and seeds along the length of the pipeline in solar-drying installations