High Temperature Solar Absorber Material Measurement Technique

Autor:	Clark W. Hawk, Joseph A. Bonometti
Rok vydání:	2001
Předmět:	Materials science Renewable Energy Sustainability and the Environment business.industry Energy Engineering and Power Technology Test method Molar absorptivity Solar energy Temperature measurement Wavelength Optics Absorptance Material properties business Visible spectrum
Zdroj:	Journal of Solar Energy Engineering. 123:216-219
ISSN:	1528-8986 0199-6231
DOI:	10.1115/1.1384571
Popis:	Basic material properties determine the amount of solar energy that is absorbed, transmitted or reflected and these values will often change with differing temperatures. This investigation developed a new approach to evaluate the material properties (i.e., reflectivity, absorptivity) of a solar absorber wall and experimentally tested the method using sample coupons. The reflectivity was measured both at ambient and elevated temperatures over a range of angles from 0 to 90 degrees. The same experimental data set was used to calculate the sample’s total reflectivity, by uniquely integrating the recorded intensities over a hemisphere. The test methodology uses the incident solar energy as the heating source, while directly measuring the reflected light (an integrated value over all visible wavelengths) and is suitable for test samples over 3,000 K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::536b0f8152bbbf983c38f3ee9354d266 https://doi.org/10.1115/1.1384571 Zobrazit plný text záznamu