Modeling chemical releases from building materials: The search for extended validity domain and parsimony  

作　　者：Lei Huang Alice Micolier Henri P.Gavin Olivier Jolliet 

机构地区：[1]Department of Environmental Health Sciences,School of Public Health,University of Michigan,Ann Arbor,MI,USA [2]I2M,CNRS,UMR 5295,351 Cours de la Libération,University of Bordeaux,33400,Talence,France [3]Department of Civil and Environmental Engineering,Duke University,Durhan,NC,USA

出　　处：《Building Simulation》2021年第4期1277-1293,共17页建筑模拟（英文）

基　　金：The authors would like to thank Dr.Cedric Wannaz from The MathWorks,Inc.for providing technical support on Matlab coding,especially on optimizing the codes for calculating a large number of positive roots for the analytical solution.This work was supported by the“Global Best Practices on Emerging Chemical Policy Issues of Concern under UN Environment’s Strategic Approach to International Chemicals Management(SAICM)”(No.S1-32GFL-000632).

摘　　要：This study aims to systematically evaluate and extend the validity domains of multiple mechanistic models of chemical emissions from building materials. We compare the validity domain of the analytical solution with four numerical solutions for a single layer material with one convective surface and a wide range of chemical properties, material thicknesses, and simulation time. We also develop a parsimonious simplified model, ensuring the widest possible validity domain with minimum simulation time. For diffusion coefficients lower than 10−15 m^(2)/s, accuracy of the analytical solution requires at least 5000 positive roots. The numerical method using uneven discretization and finite difference approximation for the boundary conditions is the best numerical solution. The parsimonious combined D- and K-limited model achieves similar accuracy as the best numerical solution except slight overestimates at the interface between the D- and K-limited zones, while having simpler computations and much shorter simulation time. These models show good agreement against experimental data. This study demonstrates that the complex analytical solution can be well approximated by a simpler model with a wide validity domain, enabling the high-throughput screenings of a large number of chemical-product combinations.

关 键 词：emission models building materials organic chemicals analytical solution numerical and simplified solutions high-throughput assessment 

分 类 号：TU502.5[建筑科学—建筑技术科学]