Abstract
The ventilation effectiveness is evaluated as a function of air exchange rate and supply/extract locations in a simplified model chamber using a tracer gas technique of CO2 gas injected into a supply duct. Ventilation systems consist of supply and extract fans, a CO2 gas generator, a CO2 gas analyzer and a test chamber. The ventilation effectiveness is evaluated using a step-down method based on ASTM Standard E741-83. The room mean age of the model chamber is decreased with increasing air exchange rate ranged from 6 to 10 air changes per hour. The ventilation effectiveness of the mechanical inlet/natural extract system is better than that of the mechanical inlet/extract system and the natural inlet/mechanical extract system.
Original language | English (US) |
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Pages (from-to) | 1286-1295 |
Number of pages | 10 |
Journal | KSME International Journal |
Volume | 14 |
Issue number | 11 |
State | Published - Nov 1 2000 |
Keywords
- Age of air
- Air changes per hour (ACH)
- Step-down method
- Tracer gas
- Ventilation effectiveness