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Electronic Resource
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Publication
SAND Report: SAND77-8300, January 1978.
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Library's review
ABSTRACT:
A theoretical heat transfer analysis of spectrally selective absorbers showed that spectral selectivity offers the greatest benefits for conditions of high absorber temperature and/or low values of solar irradiation. By using a two-band model of the selective absorber, it was found that
A theoretical heat transfer analysis of spectrally selective absorbers showed that spectral selectivity offers the greatest benefits for conditions of high absorber temperature and/or low values of solar irradiation. By using a two-band model of the selective absorber, it was found that
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the cutoff wavelength which maximizes absorber efficiency depends on just two parameters: the absorber temperature, and the level of solar irradiation. The emittance of the infrared band was found to have a greater effect upon efficiency than the absorptance of the solar band when a critical dimensionless parameter exceeds unity. Show Less