Acta Optica Sinica, Volume. 41, Issue 10, 1022001(2021)
Optimal Design of Concave Lens for Flux Homogenization of Solar Dish/Cavity Collector System
Figures & Tables(16)
Fig. 1. Solar dish receiver with concave lens. (a) Light transmission and geometric parameters; (b) cylindrical cavity receiver with flat-concave lens
Fig. 5. Comparison of simulation results between proposed method and OptisWorks 2012 software
Fig. 6. Performance results of SDC system with optimized plane-concave lens. (a) LCR distribution on surface of heat absorber; (b) optical performance indicators
Fig. 7. Optical performance indicators for SDC systems with plane-conical lens. (a) Non-uniform factor; (b) useful energy ratio; (c) optical efficiency
Fig. 8. Performance results of SDC system with optimized concave-plane lens. (a) LCR distribution on surface of heat absorber; (b) optical performance indicators
Fig. 9. Performance results of SDC system with optimized biconcave lens. (a) LCR profile on surface of heat absorber; (b) optical performance indicators
Fig. 10. Transmission path of sun rays in SDC system. (a) Concentrated solar ray; (b) with planar lens; (c) with optimized planar-conical lens; (d) with optimized conical-conical lens
Fig. 11. LCR distribution on surface of cylindrical heat absorber of SDC system before and after optimization. (a) With plane lens; (b) with optimized plano-concave conical lens; (c) with optimized biconcave conical lens
Table 1. Relevant parameters of concave lens in process of optical model verification
View tableTable 1. Relevant parameters of concave lens in process of optical model verification
Type of lens Geometric parameter d1 /mm d2 /mm Hw /mm k1 k2 Planar-conical lens 0 15.50 25.00 - 0.088 Conical-conical lens 0 3.00 25.00 0.088 0.088
Table 2. Geometric and optical parameters of SDC system
View tableTable 2. Geometric and optical parameters of SDC system
Parameter Value Aperture radius of dish concentrator (R) /m 7 Focal length of dish concentrator (f) /m 8.45 Reflectivity of dish concentrator mirror (ρmirror) 0.93 Height of cavity receiver (Hc) /mm 350 Radius of cavity receiver (Rca) /mm 140 Absorptivity of absorber surface (σabsorber) 1 Reflectivity of ordinary surface (ρwall) 0.6 Central thickness of lens (d2) /mm 3.0 Target area of absorber surface (zF) /mm [30,350]
Table 3. Optimization results of SDC system with planar-concave lens
View tableTable 3. Optimization results of SDC system with planar-concave lens
Type of lens Optimization result Geometric parameter of lens Non-uniform factor Useful energy ratio /% Optical efficiency /% Planar lens d1=0 mm,Hw=25.0 mm 0.59 74.32 81.02 Planar-conical lens X=[-6.76 50.00 0.27] 0.20 74.14 80.57 Planar-parabolic lens X=[-11.41 49.53 53.65] 0.20 70.11 77.51 Planar-spherical lens X=[-8.53 50.00 123.53] 0.22 70.85 77.86 Planar-elliptical lens X=[-7.35 50.00 312.94 191.76] 0.21 70.41 77.27
Table 4. Optimization results of SDC system with concave-planar lens
View tableTable 4. Optimization results of SDC system with concave-planar lens
Type of lens Optimization result Geometric parameters of lens Non-uniform factor Useful energy ratio /% Optical efficiency /% Planar lens d1=0 mm and Hw=25.0 mm 0.59 74.32 81.02 Conical-planar lens X=[-25.00 38.61 0.98] 0.31 74.03 78.17 Parabolic-planar lens X=[-4.22 28.45 50.00] 0.32 75.74 82.62 Spherical-planar lens X=[-16.35 27.35 50.00] 0.29 74.53 78.87 Elliptical-planar lens X=[-25.67 33.84 347.84 88.90] 0.30 72.52 76.51
Table 5. Optimization results of SDC system with concave-concave lens
View tableTable 5. Optimization results of SDC system with concave-concave lens
Type of lens Optimization result Geometric parameters of lens Non-uniform factor Useful energy ratio /% Optical efficiency /% Planar lens d1=0 mm and Hw=25.0 mm 0.59 74.32 81.02 Conical-conical lens X=[-29.06 49.37 0.26 0.16] 0.11 70.03 79.84 Parabolic-parabolic lens X=[-24.31 49.22 56.08 172.78] 0.20 70.15 79.49 Spherical-spherical lens X=[-32.25 49.37 71.88 319.88] 0.19 70.15 77.91 Elliptical-elliptical lens X=[-33.63 50.00 231.14 96.20 245.73 284.36] 0.19 70.46 76.34
Tools
Get Citation
Copy Citation Text
Jian Yan, Duzhong Nie, Yong Tian, Yongxiang Liu, Youduo Peng. Optimal Design of Concave Lens for Flux Homogenization of Solar Dish/Cavity Collector System[J]. Acta Optica Sinica, 2021, 41(10): 1022001
Paper Information
Category: Optical Design and Fabrication
Received: Nov. 6, 2020
Accepted: Dec. 15, 2020
Published Online: May. 11, 2021
The Author Email: Yan Jian (yanjian1988@hnust.edu.cn)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20