Abstract
Aerogel is a transparent, low density, insulating material suitable for a variety of solar applications. Significant energy savings can be realized by using aerogel for a window glazing material. Other possible applications include solar collector covers, transparent insulating jackets for direct gain passive solar devices, and situations that require both transparency and good insulation. Because silica aerogel has a low density (2-10% solid), it has a thermal conductivity as low as 0.014 W/m°K without evacuation, and if evacuated, lower than 0.006 W/m°K. It provides a clear view with only slight coloring due to its weak and nearly isotropic scattering of light.
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