Study on the Optical Properties of Triangular Cavity Absorber for Parabolic Trough Solar Concentrator

Table 2

The parameters of the orthogonal experiments.

Factor	Level
	1	2	3
: aperture width/mm	68	70	72
: depth-to-width ratio	0.75 : 1.00	0.80 : 1.00	0.85 : 1.00
: offset distance/mm	−15	−10	−5