JUSTIFICATION FOR THE SELECTION OF EQUIPMENT FOR THE ACTIVE VENTILATION SYSTEM OF A DRUM SOLAR DRYER

Abstract

The design parameters are calculated and the selection of the equipment for the active ventilation system of the drum helium dryer of grain is justified It is concluded that the use of an electric heater under long-term adverse weather conditions is irrational due to the high consumption of electricity, therefore, it is recommended to use only an active ventilation system to dry grain under such conditions. It is recommended to use the electric heating system in case of short unfavorable weather conditions, as well as at the first stage of drying in normal weather conditions for faster heating of the grain and intensification of the drying process. The recommended speed of movement of the drying agent in the drying chamber is 1.5 m / s, which makes it possible to effectively remove excess moisture from the upper layers of the dried material, while not cooling it. It has been experimentally established that the required speed of the drying agent in the chimney is 0.8 m / s. The power of the heating element is 7157 W for the volume of the drying drum of 300 kg of grain.