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Investigation on the Solar Absorption Property of the Nanoporous Alumina Sheet for Solar Application

He, Song; Zhang, Yanmei; Yang, Wansheng; Wang, Zhangyuan; Zhao, Xudong; Wang, Pingnuo

Authors

Song He

Yanmei Zhang

Wansheng Yang

Zhangyuan Wang

Pingnuo Wang



Abstract

In order to improve the absorption performance of the aluminum sheet for solar application, the nanoporous alumina sheets with the pore diameters of 30 nm and 400 nm were prepared by the anodic oxidation method. The absorption properties of the nanoporous alumina sheets under different solar radiation intensity were studied and compared with the conventional polished aluminum sheet. The results showed that the average absorptivity of the aluminum sheets decreased with the increase of the radiation intensity. When the radiation intensity was 100 W/m2, the nanoporous alumina sheet with the 30 nm pore diameter had the highest average solar absorptivity of 0.39, which was 18% higher than that of the nanoporous alumina sheet with 400 nm pore diameter, and 50% higher than that of the polished aluminum sheet. The maximum instantaneous absorption efficiency of the nanoporous alumina sheet with 30 nm pore diameter was found at 0.92 when the radiation intensity was 100 W/m2. The testing results indicated that the nanoporous alumina sheet with the 30 nm pore diameter performed the best compared with the other two aluminum sheets. By error propagation analysis, the relative error of the average amount of heat absorption and the average absorptivity were acceptable.

Citation

He, S., Zhang, Y., Yang, W., Wang, Z., Zhao, X., & Wang, P. (2019). Investigation on the Solar Absorption Property of the Nanoporous Alumina Sheet for Solar Application. Materials, 12(14), Article 2329. https://doi.org/10.3390/ma12142329

Journal Article Type Article
Acceptance Date Jul 16, 2019
Online Publication Date Jul 22, 2019
Publication Date Jul 22, 2019
Deposit Date Jul 27, 2019
Publicly Available Date Mar 29, 2024
Journal Materials
Electronic ISSN 1996-1944
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 12
Issue 14
Article Number 2329
DOI https://doi.org/10.3390/ma12142329
Keywords General Materials Science
Public URL https://hull-repository.worktribe.com/output/2243959
Publisher URL https://www.mdpi.com/1996-1944/12/14/2329

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