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Energy and the Environment, 1999

ISSN:
1-56700-127-0 (Print)

A MODELLING APPROACH TO SUPPORT NATURAL VENTILATION SYSTEM DESIGN

Antonio Ferreira Miguel
Geophysics Centre of Évora, Department of Physics, School of Sciences and Technology, University of Evora, Portugal Institute of Earth Sciences (ICT) Evora, Portugal

A. M. Silva
Department of Physics, University of Evora Rua Romao Ramalho 59 7000 Evora, Portugal

Abstract

In this study the influence of a porous material (screen or filter) in the inlet aperture of an enclosure is analysed. Based on an analytical approach the influence of airflow characteristics of porous material on indoor climate of an enclosure is studied. Simulations show that the area of the aperture and the permeability and porosity of the screen or filter strongly influence the ventilation level and therefore the indoor climate of an enclosure. In order to obtain a required level of ventilation a compromise between these parameters should be found.