Solar heat collector for use in solar-thermal plant, has absorbers absorbing diffuse radiation reflected by mirror surface, where receiver tube is at higher temperature level, and absorbers are in lower temperature level

摘要

The collector has a parabolic profiled reflecting mirror surface, and a receiver tube arranged on a focus axis of the reflecting mirror surface, where a direct radiation irradiated on the reflecting mirror surface is reflected and concentrated in the receiver tube. Diffuse radiation reflected by the reflecting mirror surface is absorbed by a set of absorbers arranged laterally at edges of the mirror surface and perpendicular to a main mirror plane, where the receiver tube is at a higher temperature level, and the absorbers are in a lower temperature level.