Uncertainty in air flow calculations using tracer gas measurements
Sherman, M. H.
1989 Building and Environment, 24(4): 347-354
Sherman, M. H., (1989), "Uncertainty in air flow calculations using tracer gas measurements", Building and Environment, 24(4): 347-354.
Abstract:
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.
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