Solar Energy Systems

Direct absorption Solar Collectors (DASC) works on the principle of volumetric absorption of solar radiation. A typical parabolic trough solar collector wroks on three main steps: (i) concentrating the solar radiation on the receiver surface, (ii) energy conversion at the absorber surface and, (iii) heat transfer from absorber surface to working fluid by convection and conduction. In the DASC, the concentrated solar rays are directly absorbed by the fluid. Transparent glass annulus is used in such cases to allow the passage of radiation into the fluid volume.