Features of Indoor Human Surface Chemical Reaction under Displacement Ventilation

Ozone reactions with human surfaces (skin, hair, and clothing) are an important source of volatile organic compounds in the indoor air, which play an important role in indoor air quality and building occupant health. It's the purpose of this study to obtain the characteristics of air change rate (ACH) and reactants concentration impacting human surface chemical reaction, which is very necessary and meaningful for guiding how to improve indoor air quality (IAQ). Theoretical model describing indoor human surface chemical reaction between O3 and Squalene, heat and mass transfer was established and verified. Meanwhile, three kinds of factors were taken into account and their influence on human surface chemical reaction under displacement ventilation was analyzed for typical building space. The results show that the rising of ACH is benefit for reducing the exposure concentration of product (secondary pollutant) under displacement ventilation. Moreover, lowering ozone concentration in supplied air and squalene concentration in human surface is very meaningful for improving IAQ.