Affiliation:
1. e-mail:
2. Sandia National Laboratories, P.O. Box 5800, MS-1127, Albuquerque, NM 87185-1127
Abstract
Pyromark 2500 is a silicone-based high-temperature paint that has been used on central receivers to increase solar absorptance. The radiative properties, aging, and selective absorber efficiency of Pyromark 2500 are presented in this paper for use as a baseline for comparison to high-temperature solar selective absorber coatings currently being developed. The solar absorptance ranged from ∼0.97 at near-normal incidence angles to ∼0.8 at glancing (80°) incidence angles, and the thermal emittance ranged from ∼0.8 at 100 °C to ∼0.9 at 1000 °C. After thermal aging at temperatures of ∼750 °C or higher, the solar absorptance decreased by several percentage points within a few days. It was postulated that the substrate may have contributed to a change in the crystal structure of the original coating at elevated temperatures.
Subject
Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment
Reference10 articles.
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3. Ho, C. K., Mahoney, A. R., Ambrosini, A., Bencomo, M., Hall, A., and Lambert, T. N., 2012, “Characterization of Pyromark 2500 for High-Temperature Solar Receivers,” Proceedings of the ASME 2012 Energy Sustainability and Fuel Cell Conference, San Diego, CA, July 23–26, ASME Paper No. ESFuelCell2012-91374.
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172 articles.
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