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Cooling and Energy-Saving Performance of Different Green Wall Design: A Simulation Study of a Block

Author

Listed:
  • Jiayu Li

    (School of Architecture and Art, Central South University, Changsha 410083, China)

  • Bohong Zheng

    (School of Architecture and Art, Central South University, Changsha 410083, China)

  • Wenquan Shen

    (School of Architecture and Art, Central South University, Changsha 410083, China)

  • Yanfen Xiang

    (School of Architecture and Art, Central South University, Changsha 410083, China)

  • Xiao Chen

    (College of Sports and Art, Hunan Agricultural University, Changsha 410128, China)

  • Zhiyong Qi

    (School of Architecture and Art, Central South University, Changsha 410083, China)

Abstract

To mitigate the urban heat island (UHI) and release the low carbon potential of green walls, we analyzed the cooling and energy-saving performance of different green wall designs. Envi-met was applied as the main simulation tool, and a pedestrian street named Yuhou Street was selected as the study object. Four designs of walls were summarized and simulated, demonstrating the living wall system (LWS). Super soil had superiority in cooling and energy saving. Outdoor air temperature, indoor air temperature, outside wall surface temperature, and inside wall surface temperature were analyzed. Apart from the outdoor air temperature, the other three temperatures were all significantly affected by the design of green walls. Finally, energy savings in building cavities were determined. The indoor energy saving ratio of the LWS based on super soil reached 19.92%, followed by the LWS based on boxes at 15.37%, and green facades wall at 6.29%. The indoor cooling powers on this typical day showed that the cooling power of the LWS based on super soil was 8267.32 W, followed by the LWS based on boxes at 6381.57 W , and green facades wall at 2610.08 W. The results revealed the difference in cooling and energy-saving performance of different green walls in this typical hot summer area.

Suggested Citation

  • Jiayu Li & Bohong Zheng & Wenquan Shen & Yanfen Xiang & Xiao Chen & Zhiyong Qi, 2019. "Cooling and Energy-Saving Performance of Different Green Wall Design: A Simulation Study of a Block," Energies, MDPI, vol. 12(15), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:15:p:2912-:d:252637
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    5. Alireza Sedghikhanshir & Yimin Zhu & Yan Chen & Brendan Harmon, 2022. "Exploring the Impact of Green Walls on Occupant Thermal State in Immersive Virtual Environment," Sustainability, MDPI, vol. 14(3), pages 1-25, February.
    6. Guilhardo Barros Moreira de Carvalho & Luiz Bueno da Silva, 2024. "The microclimate implications of urban form applying computer simulation: systematic literature review," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 26(10), pages 24687-24726, October.
    7. Ileana Blanco & Fabiana Convertino, 2023. "Thermal Performance of Green Façades: Research Trends Analysis Using a Science Mapping Approach," Sustainability, MDPI, vol. 15(13), pages 1-23, June.
    8. Jiayu Li & Bohong Zheng & Komi Bernard Bedra & Zhe Li & Xiao Chen, 2021. "Evaluating the Effect of Window-to-Wall Ratios on Cooling-Energy Demand on a Typical Summer Day," IJERPH, MDPI, vol. 18(16), pages 1-13, August.
    9. Alejandro Prieto & Marcela Pastén, 2024. "What Is Your Building Doing for the City? Systematic Literature Review on the Potential of Façade Design for the Mitigation of Urban Environmental Problems," Sustainability, MDPI, vol. 16(17), pages 1-27, September.
    10. Jiayu Li & Bohong Zheng & Xiao Chen & Yihua Zhou & Jifa Rao & Komi Bernard Bedra, 2020. "Research on Annual Thermal Environment of Non-Hvac Building Regulated by Window-to-Wall Ratio in a Chinese City (Chenzhou)," Sustainability, MDPI, vol. 12(16), pages 1-13, August.
    11. Farshid Aram & Ebrahim Solgi & Ester Higueras García & Amir Mosavi & Annamária R. Várkonyi-Kóczy, 2019. "The Cooling Effect of Large-Scale Urban Parks on Surrounding Area Thermal Comfort," Energies, MDPI, vol. 12(20), pages 1-21, October.

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