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| | Abstract | | The 2011 off the Pacific coast of Tohoku Earthquake and the successive nuclear disasterat the Fukushima Daiichi Nuclear Power Plant have causeda risk of the power shortage, especially in mid summer. It has become of key importance to save the energy.About one third of the total electricity demand at the peak consumption in summer is for the air-conditioning in the household and office sectors in Japan. It is, therefore, necessary to think deliberately of the reduction of electric power demand for air-conditioning.In fact, the temperature of housings could be kept lower, without air-conditioning,by coating them with paint admixed with fine spheres (insulating paint). Insulation effects are experimentally well known, but merely analyzed theoretically yet. In this study, we focus on the electromagnetic wave scattering induced by fine silica spheres. We consider fine spheres randomly distributed in a paint layer, and analyze its scattering characteristics using the Monte Carlo ray tracing method based on the Mie theory. The result is found to be in good agreement with commercial paint. We conclude that the Monte Carlo simulation has led us to a quantitative analysis of the insulation effects and to find the optimum properties of spheres to be admixed with paint. |
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