Dynamic measurement of the airflow rate in a two-zones dwelling, from the CO2 tracer gas-decay method using the Kalman filter

The measurement of natural airflows is challenging, because low pressures involved in ventilation, and their variability. tracer gas decay method the most used to assess airflows. It is, however, not adapted multi-zone dwellings. A protocol based on tested here involving Kalman filter, a correction procedure concentrations. Both intend allow global airflow-rate passive-stack ventilated dwelling. concentrations inhibits infiltrations that would have an impact accuracy implemented filter allows measuring dynamic airflow-rate, while background concentration varies which bias conventional method. key issue when implementing CO2 dwelling as, depending its sources, any room likely vary. robustness proposed was through parametrical analysis laboratory twincells it showed significantly lower sensitivity compared 2-points Maximum deviations were systematically from 4 11 points. allowed increasing up 190 ability questioned. strongly influenced by process noise variance associated state parameters are defined experimenter.