Spinel Cu-Mn-Cr Oxide Nanoparticle-Pigmented Solar Selective Coatings Maintaining >94% Efficiency at 750 degrees C
Can Xu, Xiaoxin Wang, and Jifeng Liu
TL;DR
This paper presents a spray-coated spinel Cu-Mn-Cr oxide nanoparticle-pigmented solar selective coating that maintains over 94% efficiency at 750°C, demonstrating high durability and spectral selectivity for high-temperature CSP applications.
Contribution
It introduces a scalable spray-coating method for high-efficiency, thermally stable solar selective coatings based on non-stoichiometric spinel Cu-Mn-Cr oxide nanoparticles.
Findings
Maintains >94% efficiency at 750°C after 60 thermal cycles
Achieves >92.5% efficiency at 800°C under high solar concentration
Spectral selectivity is intrinsic to nanoparticle band transitions
Abstract
High-temperature concentrating solar power (CSP) system is capable of harvesting and storing solar energy as heat towards cost-effective dispatchable solar electricity. Solar selective coating is a critical component to boost its efficiency by maximizing solar absorptance and minimizing thermal emittance losses. However, maintaining a high solar-thermal conversion efficiency >90% for long-term operation at >750 degrees C remains a significant challenge. Herein, we report spray-coated spinel Cu-Mn-Cr oxide nanoparticle-pigmented solar selective coatings on Inconel tube sections maintaining >94% efficiency at 750 degrees C and >92.5% at 800 degrees C under 1000x solar concentration after 60 simulated day-night thermal cycles in air, each cycle comprising 12h at 750 degrees C/800 degrees C and 12h cooling to 25 degrees C. The solar spectral selectivity is intrinsic to the band-to-band and…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.