抄録
The luminous analogue computer or digital computer may be used for the solution of simultaneous equations which express the interreflection systems. As has been already discussed by Moon and Spencer, O'Brien, Iizuka and Ishino, the room coefficient k_r has been widely used for the purpose of simplifying the form and size of the room in the interior lighting design. On the other hand, this coefficient is called the equivalent height, and Hisano, Watanabe Matsuura at al. have difined as z instead of k_r in the study of the lightwell. In this paper, daylighting calculation is carried out by using the room coefficient in case of an idealized room with a unilateral lighting window. The foundamental luminous emittance ratio data necessary to prediction of the daylight factor and total illumination of the working plane or floor are tabulated. The differece between numerical values of the luminous emittance ratio obtained by the interreflection method (luminous flux transfer method) and that of the luminous emittance ratio obtained by applying the approximate formula based upon the reciprocity theorem of the shape modulus (form factor) is compared and discussed with regard to the location, form and size of a lighting window.
