Optical performance evaluation of a circular cylindrical solar concentrator using different absorber shapes

Punita Taneja; S. S. Mathur; T. C. Kandpal

doi:10.1364/AO.30.001735

Applied Optics
Vol. 30,
Issue 13,
pp. 1735-1740
(1991)
•https://doi.org/10.1364/AO.30.001735

Optical performance evaluation of a circular cylindrical solar concentrator using different absorber shapes

Punita Taneja, S. S. Mathur, and T. C. Kandpal

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Punita Taneja, S. S. Mathur, and T. C. Kandpal, "Optical performance evaluation of a circular cylindrical solar concentrator using different absorber shapes," Appl. Opt. 30, 1735-1740 (1991)

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Abstract

The concentration characteristics of a seasonally adjusted circular cylindrical solar concentrator arr studied for four different absorber configurations: flat horizontal, flat vertical, tubular, and defocused tubular absorber with a vertical fin. The effect of normally distributed mirror surface slope errors on the concentration characteristics of the concentrator is also investigated.

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Equations (29)

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Mirror rim angle	Intercept factor

(θr) degrees	Angle of incidence θ (degrees)
(θr) degrees	θ = 0°	θ = 4°	θ = 8°
25	0.72	0.69	0.56
30	0.72	0.64	0.55
35	0.62	0.60	0.54
40	0.51	0.52	0.51
45	0.47	0.46	0.45
50	0.41	0.41	0.44
55	0.38	0.40	0.38
60	0.37	0.36	0.36
65	0.33	0.33	0.33
70	0.32	0.31	0.34
75	0.31	0.31	0.31
80	0.31	0.31	0.31
85	0.30	0.30	0.30
90	0.30	0.30	0.29

Mirror rim angle	Intercept factor

(θr) degrees	Angle of incidence θ (degrees)
(θr) degrees	θ = 0°	θ = 4°	θ = 8°
25	1.00	0.34	0.01
30	1.00	0.38	0.01
35	1.00	0.41	0.25
40	1.00	0.53	0.29
45	0.97	0.58	0.29
50	0.93	0.64	0.31
55	0.89	0.64	0.31
60	0.86	0.66	0.33
65	0.85	0.68	0.38
70	0.82	0.68	0.42
75	0.80	0.66	0.36
80	0.79	0.64	0.36
85	0.79	0.63	0.36
90	0.77	0.63	0.35

Mirror rim angle	Intercept factor

(θr) degrees	Angle of incidence θ (degrees)
(θr) degrees	θ = 0°	θ = 4°	θ = 8°
25	1.00	0.83	0.18
30	0.96	0.83	0.30
35	0.87	0.83	0.46
40	0.80	0.78	0.68
45	0.74	0.74	0.70
50	0.73	0.71	0.68
55	0.71	0.69	0.66
60	0.68	0.66	0.64
65	0.65	0.65	0.64
70	0.65	0.65	0.63
75	0.63	0.62	0.60
80	0.60	0.61	0.60
85	0.60	0.60	0.60
90	0.60	0.60	0.60

Mirror rim angle	Intercept factor

(θr) degrees	Angle of incidence θ (degrees)
(θr) degrees	θ = 0°	θ = 4°	θ = 8°
25	1.00	0.52	0.04
30	1.00	0.57	0.23
35	1.00	0.67	0.35
40	1.00	0.70	0.44
45	0.99	0.72	0.49
50	0.94	0.73	0.53
55	0.90	0.70	0.56
60	0.87	0.68	0.55
65	0.84	0.68	0.54
70	0.82	0.67	0.54
75	0.81	0.66	0.54
80	0.80	0.65	0.53
85	0.79	0.65	0.52
90	0.79	0.65	0.52

σ (degrees)	Intercept factor
	Angle of incidence θ (degrees)
	θ = 0°	θ = 4°	θ = 8°
0.00	0.74	0.74	0.70
0.50	0.74	0.73	0.68
1.00	0.74	0.73	0.63
1.50	0.74	0.71	0.61
2.00	0.72	0.70	0.59

Abstract

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Figures (5)

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Equations (29)

Applied Optics