An experimental study of ventilation effectiveness in mechanical ventilation systems using a tracer gas method

Jae Keun Lee, Tae Wook Kang, Kam Gyu Lee, Min Chul Cho, Jin Hyuk Shin, Seong Chan Kim, Jeong Hwan Koo, Jong Ho Lee

Research output: Contribution to journalArticle

3 Scopus citations

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 languageEnglish (US)
Pages (from-to)1286-1295
Number of pages10
JournalKSME International Journal
Volume14
Issue number11
StatePublished - Nov 1 2000

Keywords

  • Age of air
  • Air changes per hour (ACH)
  • Step-down method
  • Tracer gas
  • Ventilation effectiveness

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