The reflector materials of all-glass evacuated tubular collectors

摘要

Generally the all-glass evacuated tubular collector needs a reflector to improve the heat gain from the sun. There are two kinds of the reflector materials: one has solar specular reflectance for mirror reflector, the other has high solar diffuse reflectance for flat plate reflector behind the collector tubes. In this paper, some experiments had be done for testing some materials of reflector, and gives out the results which one is good for evacuated tube solar collector.