Air infiltration in high-rise buildings

Performs tracer gas measurements and fan pressurization experiments on an 8-storied student residential building in order to determine the influence of wind as well as of stack effect upon air infiltration. Compares pressure and tracer gas distributions with those from a predictive infiltration computer model for high rise buildings. To study the influence of the air flow pattern around the building, adapts the calculated flow pattern in the stairwell to the measured tracer gas concentration with the aid of urban wind velocity profiles and different sets of upwind dependent surface pressure coefficients. A satisfactory correlation is only obtained by application of local pressure coefficients from wind tunnel experiments matching the wind velocity profile as well as the surrounding pattern as closely as possible.