Air flows measured in large openings in a horizontal partition
Klobut, K. and Siren, K.
1994 Building and Environment, 29(Papers from Indoor Air '93): 325-335
Klobut, K. and Siren, K., (1994), "Air flows measured in large openings in a horizontal partition", Building and Environment, 29(Papers from Indoor Air '93): 325-335.
Abstract:
Laboratory experiments were carried out to explore, for the first time, the influence of several parameters on combined forced and density-driven air flows through large openings in a horizontal partition. Such flows may occur, for example, in a stairwell connecting two floors of a detached house. The two-way flows in the opening were monitored using a tracer gas technique. Variable parameters included the direction and rate of the net flow, the temperature difference between the zones, and the dimensions of the large opening. The results of the investigation are presented and discussed.
Sherman, M. H., (1989), Uncertainty in air flow calculations using tracer gas measurements, Building and Environment, 24(4): 347-354.
Notes
Tracer gas techniques are becoming widely used to measure the ventilation rates in buildings. As more detailed information is required for both energy and indoor air quality purposes, researchers are turning to complex, multizone tracer strategies. Both single gas and multiple gas techniques are being utilized, but only multigas techniques are capable of uniquely determining the entire matrix of air flows. In any of these measurement techniques, the determination of the precision of the result is critical for understanding its significance. This report derives expressions for determining the uncertainties in the air flows from the measured data. Examples indicate that real-time techniques are more precise than integrated techniques and that multigas techniques are more precise than single-gas techniques.
