air quality assessment & management
Reference and User Manual
      AirWare   On-line Reference Manual
        Release Level 7.0
        Revision Level beta
        Release Date 2015 03

      Last modified on:   Thursday, 3-Dec-15 15:55 CET

      Indoor air quality model

      The INDOOR air quality model is a simple box model (lumped or semi-distributed, for one or a set of coupled boxes) that described the dynamics of indoor air pollution for "buildings" of definedimple geometries.

      The models consider internal emissions (from industrial, commercial or household activities) and air ecxhange with the outside.

      Outside air quality (for air exchange) is taken for any appropriate model scenario, or specified as a constant or time-variable boundary conditions. The coupling is one-directional, i.e., the model does not considers the building as an emission source for the outside ambient air and pollutant concentrations.

      Building objects

      Buildings are objects defined by

      • their location
      • their volume (floor space and average height
      • dynamic air exchange (with each other and/or the outside air mass;
      • a filter/cleaning efficiency of that air exchange
      • substance specific internal emissions for an open list of substances including POP and air toxics.
      • emission patterns.

      INDOOR model scenario

      The model scenario inherits the basic data (location, geometry, emissions, ambient air pollutant concentrations where available) for the building object it is defined for.

      Basic scenario parameters include the runtime, Start date/time in the case of external coupling to an outside ir quality model scenario, and optionally modified scenario values for

    • building volume
    • air exchange
    • filter efficiency for gases and PM10;
    • internal emission rates; these are defined fora (default set)
      • NOx, NO2
      • PM10, PM2.5
      • CO, VOC
      • Radon
      • Benzene
      • Trichlorethylene, Tetrachlorethylene
      • Formaldehyde, Benzo[a]pyrene, Naphtalene
      • arbitrary tracer (concervative or first order decay).

      The results of the model run is summarized a average and miximal of the indoor concentrations, and a time series graph the shows the evolution of concentrations over time for a set of pollutants the user can select interactively.

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