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Numerical Investigation of Various Parameters Influence in Atrium Efficiency Improvements for Building’s Natural Ventilation

Farzan, Shahin | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 50847 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Moosavi, Ali
  7. Abstract:
  8. In order to improve the efficiency of atriums, effective parameters in ventilation and acceleration of airflow are numerous. Nevertheless, parameters such as shape and height of atrium, geometry of the inlet and outlets, opening areas and the presence of heat sources in each store play a vital role. In structures higher than one floor, there is no significant airflow in the upper floors and the ventilation of atrium is unpleasant for residents. Air movement in the building is done by buoyancy-driven force and hot air upward movement due to pressure differences.This study attempts to improve the natural ventilation performance with changing mentioned parameters. So for this purpose, 3D two-storied building simulations are presented and compared with analytical results. For validate the 2D three-storied building results, the same simulation and 3D simulation of three-storied model are designed and calculated.For achieving the accurate and real results we investigate the effect of heat sources existence and opening situations in open and close forms.After that by introducing seven different cases for atrium shapes and opening location, we achieved the significant result. By investigating the parameters such as mass flow rate, temperature, velocity, energy, Reynolds number and average temperature in these cases, we understood that the change of inlet openings has positive effect. owever, increasing the atrium altitude and increasing the atrium opening diameter improve the natural ventilation and provides suitable temperature conditions
  9. Keywords:
  10. Buildings ; Natural Ventilation ; Computational Fluid Dynamics (CFD) ; Energy Conservation ; Atrium

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