title: Pushing concentration of stationary solar concentrators to the limit.
abstract: We give the theoretical limit of concentration allowed by nonimaging optics for stationary solar concentrators after reviewing sun-earth geometry in direction cosine space. We then discuss the design principles that we follow to approach the maximum concentration along with examples including a hollow CPC trough, a dielectric CPC trough, and a 3D dielectric stationary solar concentrator which concentrates sun light four times (4x), eight hours per day year around.
authors.affiliation: School of Natural Science, University of California Merced, 5200 N. Lake Rd, Merced, CA 95343, USA. rwinston@ucmerced.edu
authors.forename: Roland
authors.initials: R
authors.lastname: Winston
authors.forename: Weiya
authors.initials: W
authors.lastname: Zhang