Solar Energy Engineering

APPENDIX 6

Equations for the Curves of Figures 3.34 to 3.36

When greater accuracy is required, the following equations can be used to represent the curves plotted in Figures 3.34 to 3.36 . The various symbols used are presented in Figure A6.1. The subscript T is for the truncated CPC design.

Figure A6.1 A truncated CPC. its height-to-aperture ratio is about one half the full height of a CPC.

The following equations apply for a full and truncated (subscript T) CPCs (Wellford and Winston, 1978):

(A6.1)

(A6.2)

(A6.3)

(A6.4)

(A6.5)

For a truncated ...