パッシブ型放散フラックス測定装置の拡散場解析と等価拡散距離予測

抄録

Recently, indoor air pollution caused by volatile organic compounds (VOCs) from building materials is known as sick building syndrome or multiple chemical sensitivity. As the countermeasure for this indoor air chemical pollution problems, building code was amended in 2002 and it was enforced in 2003. Labeling system of building material corresponding to formaldehyde emission rate is also started in Japan. Although the emission rate measurement with small test chamber based on JIS A 1901 has already been conducted, the existing methods for emission rate measurement require large-scale instruments and they are not always suitable for measuring a large number of building materials. This paper reports the results of numerical analysis of VOCs emission rate from building materials in various passive type flux measurement cell and the performance of these cells are to be clear. Furthermore, in order to supplement the emission rate data from various passive type flux measurement cell, we propose the index of effective diffusion length scale, 'L_d" and report on the analytical results.