Collector has receiver tube which leads heat-absorbing medium, where focal point of lens is located on irradiation surface at angle of incidence of sunlight

摘要

The collector (1) has a receiver tube (4) which leads a heat-absorbing medium (5). A transparent plate, particularly glass plate (3), is formed by overlapping lens (7) through local application of aspherical lens element on the receiver tube. The focal point of the lens is located on the irradiation surface (6) at an angle of incidence of sunlight. The receiver tube is made of metal, particularly copper.