Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Distributions of Local Supply and Exhaust Effectiveness according to the Room Airflow Patterns

실내 기류패턴에 따른 급기효율과 배기효율의 분포

  • 한화택 (국민대학교 기계자동차공학부) ;
  • 최선호 (국민대학교 기계공학과 대학원) ;
  • 장경진 (여수공업대학교 기계설계학과)
  • Published : 2001.09.01
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Abstract

A pulsed tracer gas technique is applied to measure distributions of local mean age and residual life time of air in a half-scale experimental chamber. The room airflow patterns are flow-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 either at bottom-left(Case 1), bottom-right(Case 2), or top-left(Case 3) location. Results show that the distribution of LMA and LMR are different from each other, but both of them are closely related to the airflow pattern in the space. Results on overall room ventilation effectiveness are provided depending upon ventilation airflow rates for three different supply-exhaust configurations.

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References

  1. ASHVE Trans. v.42 Ventilation Requirements Yaglou,C.P.;Witheridge,W.N.
  2. Building and Environment v.18 no.4 The Use of Moments for Assessing Air Quality in Ventilated Rooms Sandberg, M.;Sjoberg, M.
  3. ANSI/ASHRAE 129-1997, American Society of Heating, Refrigerating, and Air-Conditioning Engineers Measuring Air-Change Effectiveness ASHRAE
  4. Korean J. air-conditioning and refrigeration engineering v.21 no.4 Numerical approach to calculate ventilation effectiveness Han, H.
  5. The M.of the society of air-conditioning and refrigeration engineers of Korea v.28 no.1 On the definition of ventilation effectiveness Han,H.