Thermal performance and efficiency of extruded absorber solar collector

Abstract Thermal characteristics of a solar collector are presented in the article. A collector with extruded profiles is considered as the solar collector studied model, which allows increasing the efficiency of heat transfer and reducing heat loss to the environment. The calculation showed that with the intensity of solar radiation from 450 W/m2 or more, the efficiency of using solar energy of the collector is more than 50%. The heat-storage medium heating degree in it should not be more than 30-35 °C to obtain the maximum heat output of the collector with extruded profiles. The coefficient of heat removal from the collector with a change in the arrival of solar radiation and with a change in the temperature of the heat-storage medium in the collector ranges from 0.854 to 0.877.