THE VOC EMISSIONS FROM SOLID/WET BUILINDING MATERIAL ASSEMBLY: MODEL DEVELOPMENT AND PARAMETRIC STUDY

摘要

Presence of solid materials reduces but prolongs material emissions. Previous experimental studies of the solid/wet material assembly like carpet/adhesive have shown that the wet material is the major source of VOCs in the assembly, and the emission of the assembly shows lower, delayed peak and slower decay compared with that of the wet material alone. A mass transfer model for the solid/wet material assembly is presented in this paper. The model considers the diffusion and the adsorption of the solid material, and the convection over the solid; a first order decay model describes the wet material. An analytical solution of the proposed model was obtained using the integral transform method. Using this solution, the effects of the solid material properties on the emissions of the assembly were investigated. It is concluded that decreasing the diffusion coefficient and increasing the sorption capacity of the solid material will lower and delay the peak emission rates, and slow the decay.