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Investigation of Atrium Shape Influence on Natural Ventilation Performance & CFD Model

Shafiee, Ali | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 47553 (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 modern era, standpoints about atrium design have been revolutionized. In modern architecture, atrium not only designed for illuminating purposes but also designed by natural ventilation and passive cooling policies. Numerous parameters are making role in thermal efficiency of Atrium. A couple of these parameters are Atrium shape and openings area. In high rise atria the lower level rooms enjoy the advantage of buoyancy-driven ventilation while the upper level rooms suffer from its lack or weak presence. One strategy to solve this problem is designing building with various opening area in different heights but manipulating the opening size is restricted by some facts. Excessive Opening’s size variation is uncommon in practice as large upper openings may allow water ingress and small lower openings will lead to strong breezes. This project tried to overcome the problem with changing Atrium shape. So the atrium’s wall angularity changed in different case studies and these shapes were compared together in order to find relations between atrium wall angularity and thermal performance. Each case study comprises equal opening area for all floors. CFD models are implemented in order to compare cases together. The results show that converging tilted walls in atrium space just enhance thermal comfort for stories that located lower than neutral pressure level and deteriorate thermal comfort for upper stories. No advantage was observed for diverging walls in atrium. The results show combination of vertical wall and tilted wall reach the best result when tilted wall used for lower stories and vertical wall used for upper stories
  9. Keywords:
  10. Numerical Model ; Buildings ; Energy Optimization ; Numerical Solution ; Thermal Comfort ; Wall Angularity

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