A number of interzonal models have been developed to calculate air flows and pollutant transport mechanisms in both single and multizone buildings. A recent development in multizone air-flow modeling, the COMIS model, has a number of capabilities that go beyond previous models, much as COMIS can be used as either a stand-alone air-flow model with input and output features or as an infiltration module for thermal building simulation programs.
States that one of the most important parameters for multizone airflow simulation is the wind pressure distribution around a building. Pressure coefficients usually form the input, and the values derives from wind tunnel studies. Alternatives to wind tunnel tests are suggested, namely the use of statistical regression analysis of data obtained from wind tunnel studies. Describes how pressure coefficient values for a shop building were generated using a new wind pressure distribution model based on the regression analysis as well as on wall averaged values from published data.
Comfort evaluations cover air quality, thermal, visual and acoustic comfort. Today, only few computer programs allow for the integrated evaluation of several or all relevant parameters. Heat transport, ventilation as well as lighting in a room are influenced by each other. Therefore they should be integrally modelled. As a part of the IEA-ECBCS Annex 23 'Multizone Airflow Modelling', such a coupling has been realised by integrating the air flow and contaminant transport simulation code of CoMIS into the building and systems simulation code TRNSYS.
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