Focusing Characteristics of Dish Solar Concentrator Formed by Rotating Array of Parabolic/Spherical Mirrors with Same Size

Fig. 1. Novel dish concentrator formed by rotating array with same mirror unit. (a) Schematic diagram of three-dimensional structure; (b) schematic diagram of optical path transmission in two-dimensional cross-section

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Fig. 2. Schematic diagram of discrete and rectangular interception area of planar receiver

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Fig. 3. Transmission path of parallel incident rays in novel dish concentrator under different parameter combinations. (a) $f_{1} / D = 1.4, d = 150 m m, f_{m} / R_{1} = 0.6$ ; (b) $f_{1} / D = 1.4, d = 650 m m, f_{m} / R_{1} = 0.6$ ; (c) $f_{1} / D = 1.2, d = 650 m m, f_{m} / R_{1} = 1.4$ ; (d) $f_{1} / D = 1.4, d = 650 m m, R_{m} / R_{1} = 0.6$ ; (e) $f_{1} / D = 1.4, d = 350 m m, R_{m} / R_{1} = 0.4$ ; (f) $f_{1} / D = 1.4, d = 650 m m, R_{m} / R_{1} = 1.0$

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Fig. 4. Optimum receiver installation position and focal spot width varying with geometric parameters of concentrator under different mirror units. (a) Parabolic mirror unit; (b) spherical mirror unit

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Fig. 5. Interception width of focal spot and non-uniform factor of flux distribution varying with geometric parameters of concentrator using parabolic mirror unit. (a) Intercept width; (b) non-uniform factor

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Fig. 6. Interception width of focal spot and non-uniform factor of flux distribution varying with geometric parameters of concentrator using spherical mirror unit. (a) Intercept width; (b) non-uniform factor

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Fig. 7. Average concentration ratio and peak concentration ratio varying with geometric parameters of concentrator under different mirror units. (a) Parabolic mirror unit; (b) spherical mirror unit

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Fig. 8. Local concentration ratio distribution of novel dish concentrator under different typical geometric parameter combinations. (a) Typical geometric parameter combinations suitable for high-temperature concentrating thermal system; (b) typical geometric parameter combinations suitable for high-power concentrating photovoltaic system

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Fig. 9. Nephogram of local concentration ratio distribution on planar receiver under typical geometric parameter combinations of novel dish concentrator. (a) Spherical mirror, f₁/D=1.4, d=650 mm, R_m/R₁=1.0; (b) parabolic mirror, f₁/D=1.4, d=150 mm, f_m/R₁=0.6; (c) parabolic mirror, f₁/D=1.2, d=650 mm, f_m/R₁=0.6; (d) spherical mirror,f₁/D=1.4, d=350 mm, R_m/R₁=0.4; (e) spherical mirror, f₁/D=1.4, d=650 mm, R_m/R₁=0.6; (f) parabolic mirror, f₁/D=1.2, d=650 mm, f_m/R₁=1.4

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Table 1. Combination of mirror surface parameters and width of mirror unit in concentrator

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Table 1. Combination of mirror surface parameters and width of mirror unit in concentrator

Combination number n	Mirror width d /mm	Dimensionless geometric parameter（f_m/R₁ or R_m/R₁）	Combination number n	Mirror width d /mm	Dimensionless geometric parameter（f_m/R₁ or R_m/R₁）
1	d=150	0.4	19	d=450	0.4
2		0.6	20		0.6
3		0.8	21		0.8
4		1.0	22		1.0
5		1.2	23		1.2
6		1.4	24		1.4
7	d=250	0.4	25	d=550	0.4
8		0.6	26		0.6
9		0.8	27		0.8
10		1.0	28		1.0
11		1.2	29		1.2
12		1.4	30		1.4
13	d=350	0.4	31	d=650	0.4
14		0.6	32		0.6
15		0.8	33		0.8
16		1.0	34		1.0
17		1.2	35		1.2
18		1.4	36		1.4

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Jian Yan, YongXiang Liu, YaoSong Hu, YouDuo Peng. Focusing Characteristics of Dish Solar Concentrator Formed by Rotating Array of Parabolic/Spherical Mirrors with Same Size[J]. Acta Optica Sinica, 2022, 42(15): 1522002

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Paper Information

Category: Optical Design and Fabrication

Received: Jan. 5, 2022

Accepted: Mar. 7, 2022

Published Online: Aug. 4, 2022

The Author Email: Yan Jian (yanjian1988@hnust.edu.cn)

DOI:10.3788/AOS202242.1522002

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology