昼光照明のための窓面積と室形状の簡易計画法の開発

概要

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This paper describes a simple method to determine a window size and the shape of a room space for daylighting. To develop the method, we first derived a formula that relates the average daylight illuminance on the work plane to total interior surface area and the window area. In that course, the coefficient of daylight utilization (CDU), which corresponds to the coefficient of utilization appeared in the Lumen Method for electric lighting, was derived. The value of CDU was tabulated for easy use at planning stage. Using the diagram that we made, annual daylight illuminance near a window can be estimated. A couple of case studies was performed using the proposed method. The results were reasonable so that the determination of a window size and the shape of a room space for daylighting by the proposed method is applicable to architectural environmental planning.
1998-02-28