Ventilation performance of a vertical exhaust common-duct installed in a multi-story house was analysed using model experiment and computer simulation. Pressure losses at the flow junctions in the vertical common-duct were investigated using the model experiment. The pressure distributions along the vertical common-duct in three different multi-story houses of 5, 15 and 25 stories, respectively, were calculated by the computer simulation.
This paper treats the structure of models for predicting interzonal airflow and contaminant dispersal in buildings. It will discuss the mathematical structure of such models, the use of modem data structures, the application of structured program techniques and the use of object-oriented structures for the development of users interfaces and building description processes.
Large openings such as doorways or windows are privileged places through which a large amount of air, heat and pollutant species flows. In order to predict air flow rates through these systems, a physical model which can be integrated to multizone air flow models is proposed. This model is based on the empiric determination of discharge coefficients. The discharge coefficients may have different definition depending on the hypothesis of the selected model.
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