Optical design calculations are presented for a 3X compound parabolic
concentrator (CPC) to determine the coupling with hybrid photovoltaic
thermal (HPV/T) systems. Height-to-aperture and reflector-area to aper
ture-area ratios, as well as the average number of reflections for rad
iation passing through the inside and outside acceptance angles for a
full and truncated CPC, have been calculated. (C) 1998 Elsevier Scienc
e Ltd. All rights reserved.