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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on Tracer Gas Methodology to Measure Interzonal Airflow Rates

실간환기량 측정을 위한 추적가스 실험방법론에 관한 연구

  • Han, Hwa-Taik (School of Mechanical and Automotive Engineering, Kookmin University) ;
  • Cho, Seok-Hyo (Graduate School of Mechanical Engineering, Kookmin University)
  • 한화택 (국민대학교 기계자동차공학부) ;
  • 조석효 (국민대학교 기계공학과 대학원)
  • Published : 2009.11.10
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Abstract

Interzonal air movements are important to characterize overall ventilation performance of complicated multi-zone buildings. Tracer gas techniques are widely used to measure ventilation rates, ventilation effectiveness, and interzonal air movements. Depending on the number of gases used, they are divided into single and multi tracer gas methods. This paper deals with the comparison of the tracer gas methods in measuring air exchange rate between rooms. Experiments have been conducted in a simple two-room model with known airflow rates. In multi-gas procedure, the concentration decays of two tracer gases, i.e SF6 and R134a are measured after simultaneous injections in each room. The single tracer gas method is also applied by injecting SF6 gas with a time lag between two rooms. The data reduction procedures are developed to obtain the interzonal airflow rate using the matrix inversion, and various data manipulation methods are tested, such as data shift, interpolation, and smoothing. Uncertainty for each airflow rate is investigated depending on the parameters based on the setting values.

Keywords

References

  1. Sinden, F. W., 1978, Multi-chamber theory of air infiltration, Building and Environment, Vol. 13, pp. 21-28 https://doi.org/10.1016/0360-1323(78)90005-7
  2. Sherman, M. H., 1989, On the estimation of multizone ventilation rates from tracer gas measurements, Building and Environments, Vol. 24, pp. 355-362 https://doi.org/10.1016/0360-1323(89)90030-9
  3. Irwin, C. and Edwards, R. E., 1990, A comparison of different methods of calculating interzonal airflows by multiple tracer gas decay tests, Progress and Trends in Air Infiltration and Ventilation Research, Proc. of 10th AIVC Conf., IEA, Finland, Vol. 1, pp. 57-70
  4. Nazaroff, W. W., 1997, Nonlinear least-squares minimization applied to tracer gas decay for determining airflow rates in a two-zone building, Indoor Air, Vol. 7, pp. 64-75 https://doi.org/10.1111/j.1600-0668.1997.t01-1-00008.x
  5. Afonso, C. F. A. and Maldonando, E. A. B., 1986, A single tracer-gas method to characterize multi-room air exchanges, Energy and Buildings, Vol. 9, pp. 273-280 https://doi.org/10.1016/0378-7788(86)90032-0
  6. Han, H., 2003, Mechanical Measurement, pp. 43-45
  7. Han, H., 2007, An Experiment on Verification of Multi-Gas Tracer Technique for Air Exchange Rate Between Rooms, Proc. of the SAREK 2007 Winter Annual Conference, pp. 99-104