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S. Öztop:
"Potential for Passive Cooling of Buildings in Two Climatic Zones by Natural Night Time Ventilation";
Supervisor: A. Mahdavi; Institut für Architekturwissenschaften, Abteilung Bauphysik und Bauökologie, 2014; final examination: 2014-02-11.

In recent years, because of increased comfort expectations, cooling techniques are playing a crucial role in design process. At this point, night ventilation is one of the preferred passive-cooling concepts by architects and engineers. Considering that, natural ventilation approaches are becoming more of an issue due to the global warming, night ventilation is seen as an effective and energy-efficient passive-cooling strategy to improve the indoor thermal comfort in summer.
Many studies have shown that night ventilation is an effective method in order to reduce air conditioning loads and improve thermal comfort. This study presents the potential of natural night ventilation in two different climatic zones, in Istanbul and Vienna. In this context, a typical office building is modeled and the effects of different parameters such as air change rate of night ventilation, shading etc. are investigated for each city. It is resulted in comparison of cooling loads and indoor temperatures for various night ventilation scenarios and analysis of parameters that have an effect on night ventilation performance (in consideration of climatic conditions, which one has the largest/weakest effect) in Istanbul and Vienna.

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Night ventilation, thermal comfort, cooling demand, energy simulation.