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Journal of Light & Visual Environment
Vol. 34 (2010) No. 2 P 105-110



Technical Reviews

Daylight distribution and the associated heat gain of a commercial building with curtain wall façade under different degrees of obstruction are studied. A new metric ‘useful daylight illuminance’ (UDI) is applied to analyze the time varying illuminance distribution on a work plane. The solar irradiance obtained from the daylighting simulation is input to a two-node thermal model for energy simulation. The indoor air temperature profile, cooling and heating load requirement and the associated electrical energy consumption based on a typical coefficient of performance (COP) are reported.

Copyright © 2010 The Illuminating Engineering Institute of Japan

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