This paper presents results of a study where computational fluid dynamics (CFD) was the numerical tool used to analyze the ventilation performance in stations of the Buenos Aires Metro subway system. Both natural and mechanical ventilation options were studied. The study showed that although natural ventilation was sufficient to maintain the temperature criteria, it presented a potential egress problem by letting hot gases leave through the entranceways.
This paper gives an overview of the European NatVent® project on'Overcoming Technical Barriers to Low Energy Natural Ventilation in Office Type Buildings in Moderate and Cold Climates'. The project was targeted at countries like the UK with low winter and moderate summer temperatures where summer overheating from solar and internal gain can be significantly reduced by low-energy design and good natural ventilation.
The use of air solar collector realised on the north facade of a new hospital building in Rome is hereby described. The integration of solar and structural element has been studied during the design phase; the development of air gaps integrated within enclosures is related to the possibility to activate both natural (ejecting indoor air outside) and forced (preheating outside air incoming to the air handling units) ventilation. The energy gained by the solar elements has been evaluated.
The objective of this study is to propose a simplified characterization of thermal inertia, as part of the installation of a system of summer refreshment by means of nighttime cooling ventilation. On the basis of a previous study, conducted by relying upon a modal analysis, the interactions between the thermal inertia of a building and the variation of the air exchange rate have been explained.
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