Development of high-performance tandem layered absorber with wide-angular absorptance for solar thermal systems

M. Shiva Prasad, P. Uday Bhaskar, S.R. Atchuta, P. Misra, B. Sobha and Shanmugasundaram Sakthivel

Renewable Energy, 2021, vol. 176, issue C, 579-589

Abstract: Spectral control of light for efficient absorption and emission in the targeted wavelength region attracted considerable attention in recent years to attain high photothermal conversion efficiency. In this connection, a highly selective tandem absorber with wide-angular absorptance has been developed in the configuration of low emissive metallic layer by sputtering, absorber and anti-reflective layers by simple wet-chemical methods. The developed tandem absorber has a highly reflective Molybdenum (Mo) layer over on the glass substrate with emittance (ε) of 0.04 and tri-transition metal precursors-based absorber on Mo layer to improve the solar absorptance. The coatings are annealed in a vacuum environment and the resultant nanocomposite absorber coating enhanced the solar absorptance from 0.36 to 0.90. The SiO2 nanoparticles-based anti-reflective layer over on nanocomposite absorber has been developed to enhance the optical properties and the final configured tandem absorber exhibited absorptance of 0.96, the emittance of 0.12 and selectivity of 8. The tandem absorber has also exhibited a good wide-angular absorptance with a net improvement of 3.7–10.8% from an angle of incidence 10–70° respectively. Hence, the developed tandem absorber may aid in achieving high photothermal conversion efficiency for solar thermal applications.

Keywords: Spectrally selective absorber coatings; Nanocomposite base absorber; Tandem absorber; Wide-angular absorptance; Low emittance; Selectivity (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148121008041
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:176:y:2021:i:c:p:579-589

DOI: 10.1016/j.renene.2021.05.121

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 ().