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The first natural ventilation assessment in building design in Djibouti



Author(s)

Abdou Idris Omar, Abdoulkader Ibrahim Idriss, Omar Assowe Dabar, Abdourazack Ahmed Kayad and Mohamed Said Darar

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DOI:10.17265/1934-7391/2016.06.005

With a sustained period of economic growth, rapidly growing populations and with more diversified economies Africa need sustainable development; hence the greater need for massive investments in energy.Sub-Saharan countries such as Djibouti have the potential and ability to harness their natural ventilation as a passive cooling system for designing new houses. The rapid expansion of the Djibouti city is affecting negatively the environment and the safety and comfort of its inhabitants. Proper atmospheric urban planning and management arekey to making cities environmentally friendly and sustainable. Based on energy consumption, climate conditions in Djibouti and numerical analysis using Computational Fluid Dynamics (CFD), it is apparent that the natural ventilation creates a thermally comfortable indoor environment in buildings during the cool season of the year.  Measured wind data from two measurement systems are presented and discussed. Statistical analyses, wind rose, Weibull distribution were carried out to understand the natural ventilation characteristic, which is used for evolving the basic criteria for economic viability of building in the semi-arid climate of Djibouti. The study found that it is possible to benefit from natural ventilation in buildings during the cool season of the year.

Computational Fluid Dynamics, Airflow Simulation, Natural ventilation, Bioclimatic Design, Weather Data, Energy Efficiency unctuation