Research on the correlation between solar radiation and sky luminance based on the principle of photothermal integration

Wanxiang Yao, Kang Zhang, Weixue Cao, Xianli Li, Yan Wang and Xiao Wang

Renewable Energy, 2022, vol. 194, issue C, 1326-1342

Abstract: It is difficult to obtain both sky luminance and solar radiation data, which greatly restrict the development and utilization of solar resources. In this paper, the functional relationship between sky luminance and solar radiation is established. Firstly, linear and polynomial functions were established for 145 regions of the whole sky. The results show that there is a nearly linear correlation between sky luminance and solar radiation. In 145 regions, 68.3% of the regions have close accuracy between linear and polynomial functions. Secondly, the linear and polynomial equations functions are established for the four typical orientations. The accuracy of the polynomial function in the eastern and northern regions is higher than that of the linear function, but in the southern and western regions they are equivalent. Finally, a unified equation is established for the whole sky, and the result shows the accuracy of the polynomial function is more accurate. This research can realize the mutual conversion between sky luminance and solar radiation. It can not only make up for the missing sky luminance data and solar radiation data, but also provide a theoretical basis for solar thermal, photovoltaic, building energy conservation and agricultural production.

Keywords: Solar radiation; Sky luminance; Photothermal integration; Correlation; Functional relationship (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148122007960
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:194:y:2022:i:c:p:1326-1342

DOI: 10.1016/j.renene.2022.05.139

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().