Quantification of the effects of air velocity on VOC emissions from building materials

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ConferenceCIB 2004 World Building Congress: 02 May 2004, Toronto, Ontario
Pages110; # of pages: 10
SubjectVOCs, building material, mass-transfer model diffusion, evaporation; Volatile organic compounds
AbstractIt has been recognized that volatile organic compound (VOC) emissions from building materials are affected by environmental factors including surface air movements, temperature, and relative humidity in a room. Considering a wide range of environmental conditions in buildings, the effects of environmental factors can be important in simulating indoor levels of VOCs emitted from building materials. Despite the wide recognition of the issue, most research effort has been focused on qualitative investigations.The goal of this research is to determine the correlation between environmental factors and coefficients of mass-transfer based emission models in a mathematical form. As an initial step toward the goal, the emissions of decane applied on an oak substrate were tested in a 400 L dynamic flow chamber with five levels of air velocity and turbulent kinetic energy. The weight of a specimen was monitored over time. A mass-transfer model that accounts for surface evaporation and internal diffusion was applied to the measured data to determine the model coefficients. It was observed that the estimated evaporation coefficient is linearly proportional to the bulk air velocity in the chamber. Also, there was a power-law relationship between turbulent kinetic energy and evaporation coefficient.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number47064
NPARC number20377013
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Record identifier57986c12-e3bd-401e-aa8d-f50a7eec145c
Record created2012-07-24
Record modified2016-05-09
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