The purpose of the proposed task is to create databases for validation on several different buildings. Data are needed as inputs for simulation programs (e.g. pressure coefficients, infiltration parameters) and more data, including air flow patterns and differential pressures, will be used to compare the results of the simulation programs with the measured values. These data bases shall contain high quality measurements results, on a given building, of climatic data, building data, inhabitant data and flow patterns.
In the field of ventilation engineering the understanding of jet types of flow is well established. However, the behaviour of buoyant flows with high initial Archimedes numbers has been much less explored. The aim of this short note is to highlight some of the differences between ordinary jet flow and the discharge from low velocity air terminals. Results are presented both from tests carried out in a full scale mock up and from model tests with water as operating fluid.
One method of evaluating interzone airflow rates makes use of perfluorocarbon tracers (PFTs)(4). The PFTs are emitted at asteady rate by miniature permeation sources (the physical size is 7 mm diameter and 30 mm length) with a different PFT being
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