Measuring and testing – With fluid pressure – Leakage
Patent
1982-01-19
1985-01-15
Kreitman, Stephen A.
Measuring and testing
With fluid pressure
Leakage
G01M 320
Patent
active
044932073
ABSTRACT:
Tracer emission sources which emit tracer gas at a predetermined constant known rate are distributed throughout a building. The preferred source is a small vessel containing a vaporous perfluorocarbon tracer (PFT) substance having a very small bore hole in the top through which the PFT vapor can escape. Time is permitted for the tracer gas to mix uniformly throughout the building and for its concentration to equilibrate with infiltrating air. The concentration of the tracer is then measured and compared to the known volume of air in the building to determine the infiltration rate. In the preferred mode, the concentration is integrated and measured by continuously sampling the tracer gas at a constant rate on activated charcoal adsorbent over a period of several weeks. The amount of tracer substance accumulated on the adsorbent at the end of the test is directly related to the average tracer gas concentration which existed in the building during the sampling period and it can therefore be used to calculate an average infiltration rate during that period.
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Condon, P. E., et al., "An Automated Controlled-Flow Air Infiltration Measurement System", Building Air Change Rate and Infiltration Measurements, ASTM STP 719, Hunt, C. M. et al., Eds., American Society for Testing and Materials, 1980, pp. 60-72.
Kreitman Stephen A.
Roskos Joseph W.
Taggents, Inc.
Wray James C.
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