THERMOSTATICALLY CONTROLLED NON-TRACKING TYPE SOLAR ENERGY CONCENTRATOR

摘要

A solar energy concentrator comprises an array of cylindrical Fresnel lenses, all of which are fixedly aligned in the East-West direction. Each lens concentrates the sun rays and forms a line image which extends in the East-West direction. Located below the lenses are individual fluid channels which extend in the East-West direction and are spaced apart in the South-North direction. Each line image focuses onto preferably not more than two of the channels which absorb heat of the concentrated sun rays. Each channel has a thermostatically controlled valve which controls fluid flow through the channel to take place only when the channel's temperature and/or the fluid therein exceed a threshold temperature level.