Proceedings of the SAREK Conference (대한설비공학회:학술대회논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Estimation of Local Mean Ages of Air in a Room with Multiple Inlets

다중 급기구를 갖는 실내공간에서의 공기연령 산정방법에 관한 연구

  • Han, Hwa-Taik (Department of Mechanical Engineering, Kookmin University) ;
  • Shin, Cheol-Yong (Graduate School of Mechanical Engineering, Kookmin University) ;
  • Lee, In-Bok (Department of Rural System Engineering, Seoul National University) ;
  • Kwon, Kyeong-Seok (Graduate School of Rural System Engineering, Seoul National University) ;
  • Kwon, Yong-Il (Department of Building Mechanical Engineering, Shingheung Collge)
  • Published : 2009.06.25
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Abstract

This paper considers the age of air in a ventilated space with multiple supply inlets. The local mean age of air at a point from one supply inlet is different from those from the other supply inlets. It is the purpose of the present paper to investigate theoretically the relations between the LMA's from each supply and overall combined LMA whether or not to trace the origins of supply air. Transient concentration distributions are calculated with a step-up injection of tracer gas at each supply inlet, and at both inlets simultaneously. The steady state concentration with a continuous tracer injection at a supply inlet works as a weighting factor for the corresponding LMA in calculating the average overall LMA from multiple inlets.

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