Optical Transmission Characteristics of Concentrated Solar Rays in the VSR using Cup-shaped Porous Absorber

The optical transmitting characteristics of curved quartz window fitted with a Volumetric Solar Receiver (VSR) are studied. The VSR adopts a cup-shaped alumina ceramics as the receiver for modeling and testing. The transmission model of window assembled with VSR is established considering multiple reflections, refraction, and absorptions. The flux distribution on the receiving surface is simulated by Monte-Carlo ray tracing method (MCRTM). When the relative positions of the focal point, glass window and porous are changed, not only the 2-D flux distribution, but also the total energy of input and central porous are compared. The experimental system for the high-temperature VSR is established based on the sixteen dish concentrator (SDC). Through experimental studies, the highest temperatures of central porous and the time spent at different parameters are tested, instead of testing the optical flux distribution inside VSR which is hardly to be obtained. The results can provide important reference and practical value for the design and construction of high-temperature VSR in future.