Displacement natural ventilation, dense ambient air is entrained at low-level openings by thermal buoyancy sources (generally, heating elements) and displaces the lighter air in the building out through high-level openings. Since the incoming air is essentially at the low level, a thermal stratification develops between the fresh air and the air previously in the building. Theoretical solutions for thermal stratification and airflow rates were obtained for buoyancy-driven displacement natural ventilation in a single-zone building with two-level openings and three-level openings. The effects of openings sizes on stratification interface level and volume flux were studied using Newton iterative Method. It was found that for a given ventilation mode, the location of the stratification interface is a function of the geometrical parameters only and independent of the strength of buoyancy sources.
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How to cite this article
Fan, Y. and Li, D. (2005). 'Buoyancy-driven Displacement Natural Ventilation in a Single-zone Building with Two-level and Three-level Openings'. SET Proceedings, 4(1), pp. 168-171. https://doi.org/10.65582/set.2005.037
