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How internal heat loads of buildings affect the effectiveness of vertical greenery systems? An experimental study

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  • Coma, Julià
  • Chàfer, Marta
  • Pérez, Gabriel
  • Cabeza, Luisa F.

Abstract

Nature-based solutions applied to the building skin, such as green roofs and vertical greenery systems, are standing out as the most promising by contributing with thermal improvements at building scale. From previous research done by GREiA research group at the University of Lleida (Spain), energy savings up to 58% were obtained by implementing vertical greenery systems on external building walls for cooling purposes. However, since there exist other passive and active energy saving technologies in the literature review that were limited their cooling and heating capacity after implementing internal heat loads, new experimental tests for two different vertical greenery systems simulating the heat loads in both, summer and winter were conducted in this research. Additionally, these experiments also improve the scarce and controversial literature for winter conditions. The results demonstrated that considering internal loads in experimental investigations is crucial for the results of the effectiveness of the green walls and green facades. The energy savings of VGS were reduced between 22.5% and 26.7% because of the internal loads for cooling purposes, and increased about 3.6% and 3.1% for heating.

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  • Coma, Julià & Chàfer, Marta & Pérez, Gabriel & Cabeza, Luisa F., 2020. "How internal heat loads of buildings affect the effectiveness of vertical greenery systems? An experimental study," Renewable Energy, Elsevier, vol. 151(C), pages 919-930.
    • Handle: RePEc:eee:renene:v:151:y:2020:i:c:p:919-930
    DOI: 10.1016/j.renene.2019.11.077
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    1. Zhenmin Yuan & Jianliang Zhou & Yaning Qiao & Yadi Zhang & Dandan Liu & Hui Zhu, 2020. "BIM-VE-Based Optimization of Green Building Envelope from the Perspective of both Energy Saving and Life Cycle Cost," Sustainability, MDPI, vol. 12(19), pages 1-16, September.
    2. Xie, Xing & Xu, Bin & Cheng, Yuan-xia & Pei, Gang, 2023. "New method of integrating experiment for maintaining low indoor temperature into numerical modelling: A feasibility demonstration in reduced-scale building model," Energy, Elsevier, vol. 284(C).
    3. Marta Chàfer & Anna Laura Pisello & Cristina Piselli & Luisa F. Cabeza, 2020. "Greenery System for Cooling Down Outdoor Spaces: Results of an Experimental Study," Sustainability, MDPI, vol. 12(15), pages 1-12, July.
    4. Javier Orozco-Messana & Vicente Lopez-Mateu & Teresa M. Pellicer, 2022. "City Regeneration through Modular Phase Change Materials (PCM) Envelopes for Climate Neutral Buildings," Sustainability, MDPI, vol. 14(14), pages 1-12, July.
    5. He, Q. & Tapia, F. & Reith, A., 2023. "Quantifying the influence of nature-based solutions on building cooling and heating energy demand: A climate specific review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 186(C).

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