Thermal comfort in transitional spaces of buildings is established from a field study conducted in the cool season of Bangkok, Thailand. IL involved 302 indoor subjects occupying either air-conditioned or naturally ventilated environments and 291 outdoor subjects who were leaving the indoors. The data were analysed by using a calculating method, "Griffiths" values, giving neutral temperatures, and a quadratic regression for thermal acceptability.
Computational fluid Dynamics (CFD) is a powerfizl tool for analysing problems of air movement and has been increasingly widely used in applications in buildings. The emphasis has often been on its development as a replacement for the experimental approach, however, further work is needed to develop confidence in applying CFD to problems of air flow in buildings.
The use of lightwells and courtyards for natural ventilation in high-rise buildings is exaimed using both wind tunnel and field measurements of the pressures and neutral pressure zone caused by wind and temperature differences. Though air flow patterns are complex for complex building designs, air exchange rates in lightwells and courtyards were generally seen great enough to assure clean air for natural ventilation via air infiltration. However the cost of land in urban settings will probably make mechanical ventilation systems the economic choice.
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