查看文章

Enhancing ventilation effectiveness can improve indoor air quality (IAQ). Both contaminant removal effectiveness (CRE) and air change effectiveness (ACE) are widely used to evaluate ventilation effectiveness. They reflect two different aspects of IAQ, and an analysis based exclusively on ACE or CRE has important limitations. Firstly, this study is to evaluate the overall IAQ integrating ACE and CRE by using multi-indicator methods. Secondly, this study is to find out an indicator to best characterize the overall IAQ. Twenty-four experiments with different combinations of three ventilation methods (i.e. mixing ventilation (MV), displacement ventilation (DV) and stratum ventilation (SV)), four air exchange rates and two point pollutant source locations are conducted in a simulated office. Three multi-indicator methods are applied and compared, including Z-score method, Rank Sum Ratio method, and Technique for order …