Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window
Joint Authors
Nie, Du-zhong
Peng, You-duo
Yan, Jian
Mi, Cheng-ji
Liu, Yong-xiang
Tian, Yong
Source
International Journal of Photoenergy
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-04-09
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Nie, Du-zhong& Peng, You-duo& Yan, Jian& Mi, Cheng-ji& Liu, Yong-xiang& Tian, Yong. 2020. Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window. International Journal of Photoenergy،Vol. 2020, no. 2020, pp.1-16.
https://search.emarefa.net/detail/BIM-1173087
Modern Language Association (MLA)
Nie, Du-zhong…[et al.]. Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window. International Journal of Photoenergy No. 2020 (2020), pp.1-16.
https://search.emarefa.net/detail/BIM-1173087
American Medical Association (AMA)
Nie, Du-zhong& Peng, You-duo& Yan, Jian& Mi, Cheng-ji& Liu, Yong-xiang& Tian, Yong. Improvement in the Flux Uniformity of the Solar Dish Concentrator System through a Concave Quartz Window. International Journal of Photoenergy. 2020. Vol. 2020, no. 2020, pp.1-16.
https://search.emarefa.net/detail/BIM-1173087
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1173087