Previously , the daylit environment and the thermal environment were individually examined . h is necessary to establish a method ofthe ove 旧 11 plan and design, which integrates the daylit and thermal environments fbr the energy conservation , and to secure the quality ofthe indoor environme 爪 . Therefore , a min 戚 e , realistic model concerning the daylight and the solar radiation caused by the sun and sky is neGessa π y . Howeve ら the proposal ofthe model by which sky radiance and luminan distributions are integrated is noI seen . Authors have proposed the numerical e 唖u 飢 ion model conceming the sky luminance distribution and dle sky τadiance distribution . This paper aims to improve the current melhod of classifying the sky conditions , and to propose a numerical ¢ quation model by which the sky π adiance and Eum孟 nance distributions are int ¢ grated . The clear sky index is de 価ned based on the global irradiance , and the cioudless index is de亜ned based on the cloud ratio , and 1he sky conditions are classified based on both indices . The meIhod by which 山 e rel 飢 ive sky luminance and radiance distribuIions are shown by 翫 esar 口 e equation is developed. And the ¢ quations fbr the sky radiance and luminance distributions shown in absolute value are proposed . Kepmvords. ' Sky radiance
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