HOLISTIC RADIATION MODELLING WITH A FAST SIMPLIFIED RADIOSITYALGORITHM

摘要

The radiant external environment may be describedrnby two hemispheres, above and below thernhorizontal plane, which are discretised into patchesrnof known solid angle. Occlusions to these patchesrnmay be combined and represented as some patchrnfraction for which the radiant characteristics arerndefined by the dominant occlusion. By solving forrnradiant exchanges between each surface in a scenernand its associated (un)occluded patches, we have arnsimplified radiosity algorithm (SRA). This paperrndescribes the application of this SRA to solve forrnpredictions of (I) solar radiation, (ii) interiorrndaylight and (iii) longwave radiation. Comparisonsrnwith a ray tracing program show that accuraternresults are achieved at a computational cost severalrnorders of magnitude lower.