Journal of the Architectural Institute of Korea Planning & Design (대한건축학회논문집:계획계)

Architectural Institute of Korea (대한건축학회)
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Estimation of Air Exchange Rate of a Residential Building by Using Occupant-generated Carbon Dioxide Gas

재실자 발생 이산화탄소 가스를 활용한 주거건물의 공기교환율 추정

  • 강동화 (펜실베니아 주립대학교, 건축공학과)
  • Published : 2013.10.25
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Abstract

The objective of this study is to investigate methodology of estimating air exchange rates using occupant-generated carbon dioxide ($CO_2$) gas in residential buildings. The method uses build-up and decay of indoor $CO_2$ concentration data assuming constant air exchange rate and constant $CO_2$ generation rates by occupants. Field experiment data measured in residential units for 7 days were employed to investigate the $CO_2$ method and compare the results of air exchange rates estimated by $CO_2$method with those by $SF_6$ (sulfur hexafluoride) and PFT (perfluorocarbon tracer). It is found that the daily patterns of $CO_2$ concentration during the test period are not repeated. Also, it was suggested that the decay curve of $CO_2$ concentration was more feasible in estimating air exchange rates, due to the insufficient occupant schedule data provided during the experiment. The air exchange rates estimated using three methods showed different results. The $CO_2$ method using decay curve resulted in similar distribution of the estimated air exchange rates with the values by PFT method. This finding suggests that the occupant-generated $CO_2$ method can be one of practical methods to estimate air exchange rates for residential units.

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References

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