A mass transfer model for simulating VOC sorption on building materials

Abstract

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1016/S1352-2310(00) Atmospheric Environment, 35, 7, pp. 1291Environment, 35, 7, pp. -1299Environment, 35, 7, pp. , 2001 A version of this paper is published in / Une version de ce document se trouve dans :Atmospheric Environment, v. 35, no. 7, 2001Environment, v. 35, no. 7, , pp. 1291Environment, v. 35, no. 7, -1299 www.nrc.ca/irc/ircpubs Abstract -The sorption of VOCs by different building materials can significantly affect VOC concentrations in indoor environments. In this paper, a new model has been developed for simulating VOC sorption and desorption rates of homogeneous building materials with constant diffusion coefficients and material-air partition coefficients.The model analytically solves the VOC sorption rate at the material-air interface. It can be used as a "wall function"in combination with more complex gas-phase models that account for non-uniform mixing to predict sorption process. It can also be used in conjunction with broader indoor air quality studies to simulate VOC exposure in buildings.Key word index: Numerical model, indoor air quality, diffusion coefficient, partition coefficient, environmental chamber, gypsum board. T 0 reference temperature [K]

Housing materials as predictors of under-five mortality in Nigeria: evidence from 2013 demographic and health survey

“…Children presenting with asthma who are sensitised and exposed to cockroaches are at higher risk of hospitalisation [58]. Also, exposure to pollutants such as formaldehyde and volcanic organic compounds, which are emitted from building materials have been associated with asthma, and bronchial obstruction in the first 24 months of life [59, 60]. Our study revealed that women who used biomass, water from unimproved sources and unimproved toilet facilities had experienced higher under-five deaths than those using clean fuel, improved water sources and improved toilet facilities respectively.…”

Review of research on air-conditioning systems and indoor air quality control for human health

“…Many numerical models have been developed for simulating the surface emission of VOCs from building materials and decorating materials, and VOCs sorption (Won et al, 2001;Yang et al, 2001;Hodgson et al, 2002;Haghighat and Huang, 2003;Huang and Haghighat, 2003;Murakami et al, 2003;Zhang and Xu, 2003;Wilke et al, 2004;Xu and Zhang, 2004;Zhang and Niu, 2004;Kim and Kim, 2005;Lee et al, 2005;Li and Niu, 2005). Some experiments have also been performed to investigate VOCs diffusion inside the materials (Meininghaus and Uhde, 2002;Onwandee et al, 2005;Huang et al, 2006;Zhang et al, 2007).…”

A comparative analysis of mathematical models for relating indoor and outdoor toxic gas concentrations in accidental releases

“…It has been reported that the interaction between the surface and the bulk material can be described by Fick's Law using and equilibrium-interface model (Meininghaus & Uhde, 2002;Yang et al, 2001;Zhang, Zhang, Chen, & Yang, 2002;Zhao, Little, & Hodgson, 2002). Due to a lack of data on material properties and the complexity of the calculation, the interaction between the surface and the embedded sink is estimated by the onedimensional equation of Fick's law, using an effective mass transfer coefficient (Jørgensen et al, 2000;Singer et al, 2004):…”