Selective solar absorber emittance measurement at elevated temperature

Durability of solar components for CSP (Concentrated Solar Power Plant) technologies is a key point to lower cost and ensure their large deployment. These technologies concentrated the solar radiation by means of mirrors on a receiver tube where it is collected as thermal energy. The absorbers are s...

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Bibliographic Details
Main Authors: Giraud, Philémon, Braillon, Julien, Raccurt, Olivier
Format: Conference Proceeding
Language:English
Subjects:
Absorbance
Emittance
High temperature
Measurement methods
Optical equipment
Optical properties
Solar energy absorbers
Solar radiation
Thermal energy
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Summary:Durability of solar components for CSP (Concentrated Solar Power Plant) technologies is a key point to lower cost and ensure their large deployment. These technologies concentrated the solar radiation by means of mirrors on a receiver tube where it is collected as thermal energy. The absorbers are submitted to strong environmental constraints and the degradation of their optical properties (emittance and solar absorbance) have a direct impact on performance. The characterization of a material in such condition is complicated and requires advanced apparatuses, and different measurement methods exist for the determination of the two quantities of relevance regarding an absorber, which are its emittance and its solar absorbance. The objective is to develop new optical equipment for measure the emittance of this solar absorber at elevated temperature. In this paper, we present an optical bench developed for emittance measurement on absorbers is conditions of use. Results will be shown, with a discussion of some factors of influence over this measurement and how to control them.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4984498