Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window
A nonuniform and high-strength heat flux load would reduce the working efficiency, safety, and in-service life of a cavity receiver. Four types of concave quartz windows, including conical, spherical, sinusoidal, and hyperbolic tangent, were proposed to be used in the cylindrical cavity receiver of...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2020/2421391 |
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| author | Du-zhong Nie You-duo Peng Jian Yan Cheng-ji Mi Yong-xiang Liu Yong Tian |
| author_facet | Du-zhong Nie You-duo Peng Jian Yan Cheng-ji Mi Yong-xiang Liu Yong Tian |
| author_sort | Du-zhong Nie |
| collection | DOAJ |
| description | A nonuniform and high-strength heat flux load would reduce the working efficiency, safety, and in-service life of a cavity receiver. Four types of concave quartz windows, including conical, spherical, sinusoidal, and hyperbolic tangent, were proposed to be used in the cylindrical cavity receiver of a solar dish concentrator system, which can improve the flux uniformity and reduce the peak concentration ratio of the receiver. For each concave quartz window, 36 structural schemes were offered. Based on the Monte Carlo ray-tracing method, the results showed that the nonuniformity coefficient of the receiver was 0.68 and the peak concentration ratio was 1320.21 by using a plane quartz window. At the same time, when the receiver is in the best optical performance, it is the receiver with sinusoidal, conical, spherical, and hyperbolic tangent quartz windows, respectively. The optical efficiency of the receiver with the above four types of quartz windows was basically the same as that of the receiver with the plane quartz window, but their nonuniformity coefficients were reduced to 0.31, 0.35, 0.36, and 0.39, respectively, and the peak concentration ratio was reduced to 806.82, 841.31, 853.23, and 875.89, respectively. Obviously, the concave quartz window was better than the plane quartz window in improving the flux uniformity. Finally, a further study on the sinusoidal quartz window scheme of all of the above optimal parameter schemes showed that when the installation position of the receiver relative to the dish concentrator was changed, the flux uniformity of the receiver could continue to improve. When the surface absorptivity of the receiver was reduced, the optical efficiency would be reduced. For the parabolic dish concentrator with different focal distance, the concave quartz window can also improve the uniformity of the flux distribution of the cylindrical cavity receiver. |
| format | Article |
| id | doaj-art-948d0cdc4fbe4f71839b65e4713d1537 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-948d0cdc4fbe4f71839b65e4713d15372025-02-03T06:07:38ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2020-01-01202010.1155/2020/24213912421391Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz WindowDu-zhong Nie0You-duo Peng1Jian Yan2Cheng-ji Mi3Yong-xiang Liu4Yong Tian5School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, ChinaSchool of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, ChinaSchool of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, ChinaDepartment of Mechanical Engineering, Hunan University of Technology, Zhuzhou, Hunan 412007, ChinaSchool of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, ChinaSchool of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, ChinaA nonuniform and high-strength heat flux load would reduce the working efficiency, safety, and in-service life of a cavity receiver. Four types of concave quartz windows, including conical, spherical, sinusoidal, and hyperbolic tangent, were proposed to be used in the cylindrical cavity receiver of a solar dish concentrator system, which can improve the flux uniformity and reduce the peak concentration ratio of the receiver. For each concave quartz window, 36 structural schemes were offered. Based on the Monte Carlo ray-tracing method, the results showed that the nonuniformity coefficient of the receiver was 0.68 and the peak concentration ratio was 1320.21 by using a plane quartz window. At the same time, when the receiver is in the best optical performance, it is the receiver with sinusoidal, conical, spherical, and hyperbolic tangent quartz windows, respectively. The optical efficiency of the receiver with the above four types of quartz windows was basically the same as that of the receiver with the plane quartz window, but their nonuniformity coefficients were reduced to 0.31, 0.35, 0.36, and 0.39, respectively, and the peak concentration ratio was reduced to 806.82, 841.31, 853.23, and 875.89, respectively. Obviously, the concave quartz window was better than the plane quartz window in improving the flux uniformity. Finally, a further study on the sinusoidal quartz window scheme of all of the above optimal parameter schemes showed that when the installation position of the receiver relative to the dish concentrator was changed, the flux uniformity of the receiver could continue to improve. When the surface absorptivity of the receiver was reduced, the optical efficiency would be reduced. For the parabolic dish concentrator with different focal distance, the concave quartz window can also improve the uniformity of the flux distribution of the cylindrical cavity receiver.http://dx.doi.org/10.1155/2020/2421391 |
| spellingShingle | Du-zhong Nie You-duo Peng Jian Yan Cheng-ji Mi Yong-xiang Liu Yong Tian Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window International Journal of Photoenergy |
| title | Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window |
| title_full | Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window |
| title_fullStr | Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window |
| title_full_unstemmed | Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window |
| title_short | Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window |
| title_sort | improvement in the flux uniformity of the solar dish concentrator system through a concave quartz window |
| url | http://dx.doi.org/10.1155/2020/2421391 |
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