Ng Eduardo
Bibliographic info:
Building Simulation, 7, 2001, Rio de Janeiro, Brazil, p. 1215-1222

Hong Kong is the most densely populated city in the world. The Building Regulations of Hong Kong pre- scribe a minimum distance between buildings for light- ing and ventilation. Lately, designers are testing the prescribed requirements with a  performance based ap- proach using computational simulations. Doubts have been cast as to their validity and accuracy. This study compares results obtained by on-site measurements, calculation  and simulated results using Radiance and Lightscape. The study concludes that both Radiance and Lightscape over estimate daylight availability by up to 50% under conditions of high external obstruction. A work around method is suggested.