Once the flow-pressurization characteristics of a building are known, the largest uncertainty in predicting air infiltration is the effect of wind shelter from nearby buildings. To study the effects of wind sheltering a large data set of hourly air infiltration and meteorological measurements were made for a row of test houses located on an exposed rural site. This configuration produces strong variations in wind shelter as the wind direction shifts from along the row to perpendicular to it.
Airflow through a building has both mean and fluctuating components due to spatial and temporal variations in wind-induced pressures. Most of the existing investigations consider the average values of wind pressures and predict steadystate solutions for airflow [1]. This paper presents some experimental results for the validation of a proposed fluctuating airflow model [2]. The new model employs spectral analysis and statistical linearization methods to model the pulsating airflow through buildings.
We report on four new full scale experiments that were designed to measure the influence of wind on the ventilation and/or heat loss rates through single large openings: a) test-house with horizontal slit opening, set-up to measure internal pressures and the effect of air-compressibility (CSTB, France), b) attic with window ajar, set-up to measure long term ventilation rates with varying wind and temperatures (BBRI, Belgium), c) fully open window, set-up to measure ventilation rate and cooling as a function of time (BRE, UK) d) fully open window, set-up tomeasure cooling as a function of ti
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