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Application of double glazed façades with horizontal and vertical louvers to increase natural air flow in office buildings

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  • Pourshab, Nasrin
  • Tehrani, Mehdi Dadkhah
  • Toghraie, Davood
  • Rostami, Sara

Abstract

The results of previous researches clearly indicate that the main concern in applying double skin façades (DSF) is overheating of the cavity and increasing the cooling energy consumption in warm seasons. The present study intends to consider the excessive heat trapped between two skins of double glazed façades in hot arid climates as a driving force to reinforce the natural airflow across the floors of an office building. To meet this purpose, numerical simulation of airflow and heat transfer inside the cavity of the double glazed façades and the adjacent floors, as well as the effect of different types of solar shading systems in horizontal and vertical modes on the airflow has been investigated using the CFD technique. The results show that the stack effect formed inside the cavity has enough power for air suction from the floors of the building and reinforcement of the natural airflow. The type of shading device has a significant effect on the airflow behavior and the heat transfer rate in the facade. In double skin facades with horizontal louvers, the buoyancy forces inside the cavity are stronger and the ventilation rate in the building floors is higher than the model with vertical louvers. On the other hand, due to the stronger convective flow in the cavity with horizontal louvers, the heat flux on the interior glass is higher than the cavity with vertical louvers and part of the heat inside the cavity is transmitted through the interior skin to the occupied spaces.

Suggested Citation

  • Pourshab, Nasrin & Tehrani, Mehdi Dadkhah & Toghraie, Davood & Rostami, Sara, 2020. "Application of double glazed façades with horizontal and vertical louvers to increase natural air flow in office buildings," Energy, Elsevier, vol. 200(C).
    • Handle: RePEc:eee:energy:v:200:y:2020:i:c:s0360544220305934
    DOI: 10.1016/j.energy.2020.117486
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    References listed on IDEAS

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    1. Barbosa, Sabrina & Ip, Kenneth, 2014. "Perspectives of double skin façades for naturally ventilated buildings: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 40(C), pages 1019-1029.
    2. Zhou, Juan & Chen, Youming, 2010. "A review on applying ventilated double-skin facade to buildings in hot-summer and cold-winter zone in China," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(4), pages 1321-1328, May.
    3. Jordi Parra & Alfredo Guardo & Eduard Egusquiza & Pere Alavedra, 2015. "Thermal Performance of Ventilated Double Skin Façades with Venetian Blinds," Energies, MDPI, vol. 8(6), pages 1-17, May.
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    Cited by:

    1. Elmalky, Adham M. & Araji, Mohamad T., 2023. "Multi-objective problem of optimizing heat transfer and energy production in algal bioreactive façades," Energy, Elsevier, vol. 268(C).
    2. Arabi, Pouria & Hamidpour, Mahmoud Reza & Yaghoubi, Mahmood & Arabi, Faraz, 2023. "Computational analysis of blind performance on natural ventilated double skin façade in winter," Energy, Elsevier, vol. 268(C).
    3. Zhang, Haihua & Tao, Yao & Zhang, Guomin & Li, Jie & Setunge, Sujeeva & Shi, Long, 2022. "Impacts of storey number of buildings on solar chimney performance: A theoretical and numerical approach," Energy, Elsevier, vol. 261(PA).
    4. Tao, Yao & Zhang, Haihua & Huang, Dongmei & Fan, Chuangang & Tu, Jiyuan & Shi, Long, 2021. "Ventilation performance of a naturally ventilated double skin façade with low-e glazing," Energy, Elsevier, vol. 229(C).
    5. Tao, Yao & Yan, Yihuan & Chew, Michael Yit Lin & Tu, Jiyuan & Shi, Long, 2023. "A theoretical model of natural ventilation enhanced by solar thermal energy in double-skin façade," Energy, Elsevier, vol. 276(C).

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