EVALUATION OF THE COMIS MODEL BY COMPARING SIMULATION AND MEASUREMENTOF AIR-FLOW AND POLLUTANT CONCENTRATION

This paper describes the measured and calculated results of airflow ra tes and pollutant concentration profiles in an airtight test house, th e aim being to evaluate the calculation model COMIS for multizone air infiltration and pollutant transport. Firstly, the leakage areas of in ternal doors, exterior walls and windows were measured by the fan pres surization method. Secondly, two measurements were carried out, assumi ng that the test house consisted of ten zones. The concentrations and injection rate of SF6 were measured in order to determine the airflow rates by a system identification method. The boundary conditions, such as indoor and outdoor temperatures, wind speed and direction, and win d pressures were also recorded in situ and saved simultaneously on dis kettes, using a computerized data acquisition system. Thirdly, the mea sured boundary data and leakage characteristics were used as input in the simulation of airflow using COMIS; initial concentrations, injecti on rate, along with the previous data were used for simulating polluta nt transport, assuming tracer gas SF6 as a pollutant. Lastly, the comp arisons between measurement and simulation results of airflow rates an d pollutant concentrations were carried out by linear regression analy sis. The correlation coefficient between the measured and calculated a ir change rates was 0.72, and that for pollutant concentration was 0.9 4. (C) Indoor Air (1998).