The effect on ventilation parameters of various ventilation strategies.

The work described in this paper is aimed at predicting the local values of the ventilation eflectiveness parameters of large industrial buildings by a technique which involves the use of computational fluid dynamics and multizonal modelling. A modelling technique is described and applied to a typical modern industrial building equipped with both, mixing and displacement ventilation systems. The results of modelling each of the above systems are presented and discussed. They provide an interesting insight into magnitude and spatial variations in of local air change index that occur in the occupied space. The results also demonstrate how differences in ventilation strategy can result in distinctly different variations of ventilation effectiveness parameters. It is concluded that the modelling technique described may be used to provide important information about the air movement characteristics of buildings in terms of local air change index and also that it couldprove to be a very useful design aid.