抄録
This study proposes a new type of solar energy utilization, that is, utilizing visible sunshine for lighting while utilizing infrared rays to produce high temperature heat. The objective of this study is to investigate the performance of the infrared collector with non-imaging Fresnel lens experimentally. The lens has concentration ratio of 8X, which is mounted above vacuum glass tube in which heat collecting tube is located. Experimental resulted indicate that efficiency of thermal recovery from infrared rays was 10% higher than that from whole insolation. It was also found that only infrared rays could increase hot water temperature by 30degC. It can be concluded that the proposed system is technologically feasible.
