Abstract: Solar selective coatings are used as photothermal absorbers of solar systems. They enhance the efficiency of photothermal conversion and are essential at elevated temperatures for the reduction of thermal radiation losses. The spectral selectivity of the absorber is determined by its high absorptance α in the wavelength region of the solar radiation and low emittance ε at the far IR region of the spectrum corresponding to the black body thermal emittance at the operating temperature of the absorber. Typical values for these properties of selective surfaces are: 0.90 for absorptance and 0.10 for emittance.
Publication Year: 2020
Publication Date: 2020-09-28
Language: en
Type: book-chapter
Indexed In: ['crossref']
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