Study of a solar air heater with a heat exchanger – accumulator

The authors of the work presented a solar air heater for maintaining a constant temperature of heated air in drying plants and in air heating systems. The article discusses an experimental installation of a solar air heater was made and an insulated storage tank with a spiral-type heat exchanger for accumulating heated air was installed, additionally equipped with a hinged reflector parallel to the solar air heater, which is also an additional source of thermal energy of solar radiation, the results of an experimental study of the operating modes of the installation in natural and climatic conditions of Karshi. As a result of experimental studies, a high energy efficiency of a solar air heater was determined in the heating mode of heat carriers (air up to + 65 °C and waste oil up to + 75 °C) in June. The analysis of the heat balance of the developed installation is carried out. The influence of the main heat engineering parameters on the thermal power of the installation is analyzed.