風船法による住宅の自然換気量の測定

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  • 風船法による住宅の自然換気量の測定(B. 生活科学)
  • フウセンホウ ニ ヨル ジュウタク ノ シゼン カンキリョウ ノ ソクテイ
  • Experimental study on natural ventilation of a dwelling house by using CO_2 balloon method (B. LIVING SCIENCE)

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Natural ventilation of a dwelling house has been measured by using CO_2 gas method. To avoid an increase of the atmospheric pressure of the room, a balloon which was filled with CO_2 gas under the same pressure was employed as a CO_2 gas source. The measurement was carried out with a remote control system. The measured decrease of the CO_2 gas concentration was reproduced by sum of two exponential components and constant background level, which indicates that the ventilation of the room is affected at least by three states including the relevant room, surrounding atmosphere and the neighbouring room. We applied two room model, i.e. three states model instead of simple one room model, to analyse the observed decay of CO_2 gas concentration.

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