住宅における自然換気量及び大気浮遊粉塵濃度の測定

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  • 住宅における自然換気量及び大気浮遊粉塵濃度の測定(B. 生活科学)
  • ジュウタク ニ オケル シゼン カンキリョウ オヨビ タイキ フユウ フンジン
  • Measurement of Natural Ventilation and Concentration of Airborne Dust of a Dwelling House (B. LIVING SCIENCE)

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Abstract

We have measured CO_2 concentrations of the neighboring three rooms in a dwelling house simultaneously. The ventilation volumes of these rooms are deduced from the observed changes of CO_2 concentrations. By taking into account the effects of diffusion and flow on a ventilation, the observed changes of CO_2 concentrations are reproduced very well. At the same time, mass concentrations of airborne dust were also measured inside and outside of the dwelling house. The mass concentration ratio of airborne dust inside of the dwelling house to outside was ranging from 0.3 to 0.4,which agreed very well with our previous measurements. It was found that mass concentration of windward room was higher than that of downwind one. Such difference is interpreted qualitatively by the deduced air flow from the ventilation measurement.

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