Device for concentrating solar radiation

摘要

The invention relates to the concentration of solar radiation onto an absorber in such a way that the concentrated energy flux density incident on the absorber surface is constant over this surface. In order to achieve this, the shape of the reflector is formed from a plurality of juxtaposed, internally mirrored hollow conical frustums; the absorber is provided with a conicity precisely matched to the shape of the reflector. The constant solar energy flux, which is concentrated over the surface of the absorber, ensures unambiguous thermodynamic conditions, avoids instability and enables an installation to be optimally configured. Particularly significant is the constant distribution of the concentrated solar energy flux for photovoltaic use, e.g. coating the absorber surface with solar cells. The main possible application is to the efficient generation of heat in the low-temperature range, and process steam generation for sea water desalination. Power and warm water for heating purposes can be generated simultaneously when the absorber surface is coated with cooled solar cells. <IMAGE>