Energy conservation with the use of solar selective coatings

Abstract

Solar selective coatings are designed and formulated for effective collection and retention of solar energy. Several types of coatings can be utilized for economical collection of solar energy, the most common and simplest will be ordinary non-glass, heat resistant black paint. The coatings may be moderately selective or non-selective absorbers, consisting of organic or inorganic matt black paints. These are easiest to apply and the least expensive of all collector coatings. In this category other types are ceramic and organic enamels and chemical or electrochemical metal conversion coatings. An impending energy crisis has already aroused interest and scientific pursuit in the field. An analysis of the state-of-the-art in solar selective coatings was felt necessary at this time.

(Cr/TiAlCrN/TiAlN/AlSiN/AlSiO) Multi Layer Solar Selective Coatings for Concentrated Solar Power Plant

“…It can be seen that the efficiency of a solar cell is majorly dependent on the type of the absorber coatings being used. [3], an ideal selective coating is one, which satisfies the following requirements [4]: High absorption (α) over solar selective region (0.3-2.5 µm), low emissivity (Є) in the I.R region (2.5-50 µm) and sharp spectral transition. Being polymer based coatings they low thermal conductivity [5].…”