Tower Reflector for Solar Power Plant.

摘要

A tower reflector is proposed as an alternative to the central receiver solar power plant. Radiation from a field of heliostats is directed towards a mirror on top of a tower which reflects it down to a central absorber at the base of the tower. The concentration achieved by the first two stages is rather low, 50to 100,but it can be boosted to a value of several thousand by means of an array of compound parabolic concentrator (CPC) cones as third stage. Reflection losses at the second stage can be made negligible if suitable prismatic reflectors with total internal reflection are used. Radiation absorbed by the CPC cones can serve to preheat the working fluid. Thus,high optical efficiency is possible even though the light rays undergo three reflections,on the average,before reaching the final absorber.