NEW APPROACH FOR MEASURING AIR-FLOWS IN BUILDINGS USING A PERFLUOROCARBON TRACER

This paper describes a new approach for measuring airflows in building s based on a perfluorocarbon tracer (PFT) technique. Ventilation measu rements were carried out in a test room to examine the accuracy of the PFT technique. The PFT, which is a liquid at room temperature, was in jected into the room at a constant rate using a thermostatically contr olled heating unit. Tracer gas samples were collected using the active (pumped) sampling method, in which stainless-steel tubes packed with adsorbent were employed. The samples were stored for subsequent analys is in the laboratory using a thermal desorber and gas monitor. The exp erimental results from the new PFT approach were compared with the con ventional method using SF, and PFT tracer gases.