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Building envelope-enhanced phase change material and night ventilation: Effect of window orientation and window-to-wall ratio on indoor temperature

Author

Listed:
  • Al-Yasiri, Qudama
  • Alktranee, Mohammed
  • Szabó, Márta
  • Arıcı, Müslüm

Abstract

Integrating phase change material (PCM) and natural night ventilation (NNV) has notably improved building indoor thermal comfort in hot locations. The current study investigates the role of NNV through a window to improve the indoor temperature of a PCM room, considering the window orientation and window-to-wall ratio (WWR). The NNV was employed through a one-sided window of the PCM room to enumerate the advantages of passive building technologies in summer. Different window orientations and WWRs (between 8.75% and 20%) were analysed to improve the indoor environment using an experimentally validated model developed by EnergyPlus software. Numerical findings exhibited that the window orientation has a minimal effect on the NNV of the PCM room regardless of wind direction. However, the Northeast orientation was the best case for the studied location, achieving average indoor temperature reduction by up to 31%, and a thermal load levelling reduction by 9%–17%. Furthermore, the larger window size exhibited improved thermal comfort, where the WWR of 20% decreased the average indoor temperature by 1.14 °C more than the reference PCM room of WWR = 8.75% without ventilation. Besides, the operative temperature at the largest window size was reduced by up to 22% during nighttime. The study concluded that the effectiveness of NNV is limited under severe hot locations, and alternative cooling means could be advantageous.

Suggested Citation

  • Al-Yasiri, Qudama & Alktranee, Mohammed & Szabó, Márta & Arıcı, Müslüm, 2023. "Building envelope-enhanced phase change material and night ventilation: Effect of window orientation and window-to-wall ratio on indoor temperature," Renewable Energy, Elsevier, vol. 218(C).
    • Handle: RePEc:eee:renene:v:218:y:2023:i:c:s0960148123011783
    DOI: 10.1016/j.renene.2023.119263
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