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Two elementary empirical models for the dependence of global illuminance on solar elevation for clear skies are provided. The models are developed from hourly data obtained from 1 year data collected at the International Daylight Measurement Programme (IDMP) general class station at the Escuela Tecnica Superior de Arquitectura in Madrid (ETSAM), and are statistically assessed with data obtained during...
The present paper presents a practical methodology to estimate the round skylight efficiency and hence the amount of daylight that reaches the interior of a room equipped with these devices. The methodology is based on flux transfer approach to model the distribution of the luminous energy inside the round skylights for various height-to-width ratios, wall reflectances and transmittances of the glazed...
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