The means to improve the thermal efficiency of a solar collector by reducing radiant heat loss from the rear side of the solar absorber

摘要

Abstract 1. Thermal solar collector. 2.1. The invention relates to a thermal solar collector comprising a solar absorber structure (5) having a light-receiving front side (5b) and a rear side (5a) opposite said front side, and a heat transfer device (2, 4) including a heat transport flowing medium (4) in thermal contact to said solar absorber structure. 2.2. According to the invention a heat radiation shield (6) is arranged facing the rear side of said solar absorber structure for shielding said solar absorber structure rear side from radiating heat.