The Investigations of Heating Process in Solar Air Heating Collector
¹Institute of Agricultural Machinery, Latvia University of Agriculture,
Cakstes 5, LV3001, Jelgava, Latvia; e-mail: aivars.Aboltins@inbox.lv
²Institute of Agricultural Machinery, Latvia University of Agriculture,
Cakstes 5, LV3001, Jelgava, Latvia; e-mail: Janis.Palabinskis@llu.lv
The aim of the research is to find the optimal technical solutions, utilized materials as absorbers, operation parameters and power possibilities for a solar collector. Different absorbers of sun radiation, the absorbers’ ability and efficiency in air heating solar collector are compared. 0.1 x 0.5 x 1.0 meters long equipment for experimental research into the materials of solar air heating collector was built. The experimental data were measured and recorded in the electronic equipment REG. The investigations are devoted to the sun following collectors, which guarantee perpendicular location for all experimental time of the plane of absorber to the flow of the sun radiation. The collector covered material was a polystyrol plate and absorbers were: a) black colored steel tinplate and b) slices of black colored beer cans. The use experimental data received expressions of heating degree of air in collector depending on sun radiation and distance from absorber (steel tinplate) at 35 cm and 60 cm from inlet. In favorable weather conditions the heating degree of the ambient air with absorber black colored slices of beer cans reaches more than T = 10o C at the air velocity 0.9 m s-1.