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Distributions of Local Supply and Exhaust Effectiveness according to Room Airflow Patterns  

Han, Hwa-Taik (Department of Mechanical and Automotive Engineering, Kookmin University)
Choi, Sun-Ho (Graduate School, Kookmin University)
Lee, Woo-Won (Graduate School, Kookmin University)
Publication Information
International Journal of Air-Conditioning and Refrigeration / v.10, no.4, 2002 , pp. 177-183 More about this Journal
Abstract
A pulsed tracer gas technique is applied to measure the distributions of local mean age and local mean residual-life-time of air in a half-scale experimental chamber, The airflow patterns in the chamber are visualized by a Helium bubble generator for three different exhaust locations. A supply slot is located at the top of a right wall, and an exhaust slot is at either bottom-left (Case 1), bottom-right (Case 2), or top-left (Case 3) location. Results show that the distributions of local mean age and local mean residual-life-time are different from each other, but both of them are closely related to the airflow pattern in the space. Included are discussions on explaining the variations of overall room ventilation effectiveness depending upon airflow rates for three different supply-exhaust configurations.
Keywords
Ventilation effectiveness; Local mean age; Local mean residual-life-time; Tracer gas technique; Air distribution;
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