MODELING OF VOCs IN INDOOR ENVIRONMENT WITH A MODULAR TOOLBOX
Paper in proceedings, 2005
This paper presents a numerical simulation program which can be used to assess concentration and duration of
VOCs in indoor environment with respect to surrounding building constructions, furniture, appliances and
ventilation systems. Unlike from empirical models where storage and release of VOCs is treated as surface
phenomena, the model presented takes into account the volumetric storage capacity of building materials.
Simulations show that gypsum boards both take up and release VOCs fast while the release from concrete walls
takes longer time. These results are validated against measurements. As an illustration of program possibilities, the
VOCs concentration over time has been calculated for a typical office room with constant VOC source and
variable ventilation airflow (working time non working time). The room has a solid concrete structure.
Compared to a tight structure, the release of VOCs from concrete increases the concentration in indoor air by
around 10 % during working time.