Study on the Effect of Grille Structure to the Performance of Porous Media Solar Receiver

Solar Photothermal Power generation technology has developed rapidly in recent years, and collector as one of the key components has attracted the attention of many researchers. Among them, the porous medium is used as the heat absorber, and the volumetric collector with air as heat transfer is one of the most promising collector schemes, and the collector is facing the problem of large radiation loss at present. In this paper, an additional layer of grille structure is proposed in addition to porous media, and the effect of grille structure on strengthening the absorption of solar radiation and reducing the loss of thermal radiation in porous media is studied. The results of ray tracing simulation show that the increase of grille thickness will enhance the absorption of solar radiation by the collector and can greatly reduce the radiation loss.