Double-tailored nonimaging reflector optics for maximum-performance solar concentration

摘要

A nonimaging strategy that tailors two mirror contours for concentration near the étendue limit is explored,nprompted by solar applications where a sizable gap between the optic and absorber is required. Subtle limitationsnof this simultaneous multiple surface method approach are derived, rooted in the manner in which phasenspace boundaries can be tailored according to the edge-ray principle. The fundamental categories of doubletailorednreflective optics are identified, only a minority of which can pragmatically offer maximum concentrationnat high collection efficiency. Illustrative examples confirm that acceptance half-angles as large as 30 mradncan be realized at a flux concentration of u00011000. © 2010 Optical Society of America