| Title |
Evaluation of Contaminant Concentration Reduction Effect of Sorptive Building Materials by New Ventilation Index - Net Escape Velocity |
| Keywords |
Ventilation Efficiency ; Net Escape Velocity ; Purging Flow Rate ; Sorptive Building Material |
| Abstract |
Net Escape Velocity (hereafter NEV) is a new index for evaluating ventilation efficiency. It presents the effective velocity with regard to purging/diluting a contaminant from a certain point within a room. NEV is determined by the average contaminant concentration and the convection and diffusion fluxes at a particular point. NEV can identify the convection and diffusion effect of contaminant transportation in order to define that concentration at a point using one representative velocity scale. The use of sorptive building materials is an effective way to optimize the ventilation rate and to improve/maintain indoor air quality (IAQ). However, efforts to improve IAQ will necessitate a qualitative and quantitative performance evaluation of building materials. The purpose of this paper is to introduce the concept of new ventilation index NEV and to evaluate the contaminant concentration reduction mechanism of sorptive building materials using the concept of NEV. |