AN EFFICIENT TOOL FOR FUTURE BUILDING DESIGN

Efficient design tools for the thermal performance of buildings have a tremendous potential to curb the profligate use of non-renewable ener gy and reduce global environmental and housing problems. Consequently a sound design tool philosophy is proposed which will ensure the devel opment of efficient design tools in future. Based on this philosophy a new design tool is proposed which eliminates identified shortcomings. A first order thermal model of a building zone is employed. This unco mplicated representation is essential when extending the application o f the model. Extended design tool features are highlighted, namely the simulation of multizone behaviour, time-dependent thermal parameters such as variable ventilation, heat flow into the ground underneath a b uilding, alternative air-conditioning systems such as evaporative and structural cooling and comfort temperatures. The validity of the first order model is proven by 70 validation studies performed in 32 buildi ngs ranging from single-zone buildings in the desert to multistorey of fice blocks in a city centre. The success of the proposed design tool is evident from its worldwide distribution.