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Green facade for energy savings in buildings: The influence of leaf area index and facade orientation on the shadow effect

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  • Pérez, Gabriel
  • Coma, Julià
  • Sol, Salvador
  • Cabeza, Luisa F.

Abstract

To “green” building envelopes is currently one of the most promising ways to provide energy savings in buildings and to contribute to the urban heat island effect mitigation. The shadow effect supplied by plants is the most significant parameter for this purpose. One way to characterize the potential shadow effect of greenery is to calculate the facade foliar density by means of the leaf area index (LAI). As LAI is commonly used in horizontal crops, their use in vertical greenery systems (VGS) has generated dispersion and uncertainty in previous studies both in terms of methodologies and results obtained. In addition, a lack of data relating to the influence of the facade orientation in the final contribution of vertical greenery to the energy savings has been observed in previous studies.

Suggested Citation

  • Pérez, Gabriel & Coma, Julià & Sol, Salvador & Cabeza, Luisa F., 2017. "Green facade for energy savings in buildings: The influence of leaf area index and facade orientation on the shadow effect," Applied Energy, Elsevier, vol. 187(C), pages 424-437.
    • Handle: RePEc:eee:appene:v:187:y:2017:i:c:p:424-437
    DOI: 10.1016/j.apenergy.2016.11.055
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    References listed on IDEAS

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    1. Pérez, Gabriel & Rincón, Lídia & Vila, Anna & González, Josep M. & Cabeza, Luisa F., 2011. "Green vertical systems for buildings as passive systems for energy savings," Applied Energy, Elsevier, vol. 88(12), pages 4854-4859.
    2. Pérez, Gabriel & Coma, Julià & Martorell, Ingrid & Cabeza, Luisa F., 2014. "Vertical Greenery Systems (VGS) for energy saving in buildings: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 39(C), pages 139-165.
    3. Jim, C.Y., 2015. "Thermal performance of climber greenwalls: Effects of solar irradiance and orientation," Applied Energy, Elsevier, vol. 154(C), pages 631-643.
    4. Manso, Maria & Castro-Gomes, João, 2015. "Green wall systems: A review of their characteristics," Renewable and Sustainable Energy Reviews, Elsevier, vol. 41(C), pages 863-871.
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