Spectral and directional thermal radiation characteristics of selective sufaces for solar collectors
D. K. Edwards, J. T. Gier, K. E. Nelson, R. D. Roddick
Surface systems suitable for collectors of solar heat energy are examined. Spectral radiation characteristics of metallic substrates coated with semiconductor and antireflection layers are considered. Directional spectral reflectances of several surface coatings are presented and evaluated. Commercial chemical dip treatments of copper and steel are shown to give selective characteristics desirable for low temperature collectors such as solar water heaters. © 1962.
Materials
Curve 1
Temperature K: 298
Wavelength Range, μ: 0.38-25.01
Geometry θ θ' ω': ~0° ~0°
Composition (weight percent), Specifications and Remarks: IRC silicon solar cell; data extracted from smooth curve.