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Inter-building assessment of urban heat island mitigation strategies: Field tests and numerical modelling in a simplified-geometry experimental set-up

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  • Pigliautile, Ilaria
  • Chàfer, Marta
  • Pisello, Anna Laura
  • Pérez, Gabriel
  • Cabeza, Luisa F.

Abstract

Large scale mitigation strategies showed to represent promising solutions for enhancing liveability in dense urban contexts. Therefore, most of the researches are focused on assessing the effect of high albedo surfaces and greenery. The paper deals with a numerical and experimental analysis of these evapotranspiration and high-reflectance surfaces in a full scale experimental set-up where more than 20 cubicles are monitored in a Mediterranean continental climate. The experimental set-up itself covers an intermediate inter-building perspective between the lab scale and the real urban contexts, which compromises the possibility to generalize final results. This scale is able to better control geometry of area, but allows real microclimate monitoring and calibration of CFD models. Starting from a validated model, this study simulated alternative scenarios with gradually varying the presence of common mitigation strategies with the scope to evaluate their effect to this aim. Results showed that high albedo solutions best mitigate summer overheating reducing the air temperature, while greenery was more effective in the densest configurations with low albedo envelopes, showing how geometry related variables may play a key role in determining the optima configurations of microclimate mitigation strategies, also important for the best exploitation of renewables in the built environment.

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  • Pigliautile, Ilaria & Chàfer, Marta & Pisello, Anna Laura & Pérez, Gabriel & Cabeza, Luisa F., 2020. "Inter-building assessment of urban heat island mitigation strategies: Field tests and numerical modelling in a simplified-geometry experimental set-up," Renewable Energy, Elsevier, vol. 147(P1), pages 1663-1675.
    • Handle: RePEc:eee:renene:v:147:y:2020:i:p1:p:1663-1675
    DOI: 10.1016/j.renene.2019.09.082
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    References listed on IDEAS

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    Cited by:

    1. Hong, Tianzhen & Ferrando, Martina & Luo, Xuan & Causone, Francesco, 2020. "Modeling and analysis of heat emissions from buildings to ambient air," Applied Energy, Elsevier, vol. 277(C).
    2. Zhang, Hongjie & Yao, Runming & Luo, Qing & Wang, Wenbo, 2022. "A mathematical model for a rapid calculation of the urban canyon albedo and its applications," Renewable Energy, Elsevier, vol. 197(C), pages 836-851.
    3. Cristina Piselli & Matteo Di Grazia & Anna Laura Pisello, 2020. "Combined Effect of Outdoor Microclimate Boundary Conditions on Air Conditioning System’s Efficiency and Building Energy Demand in Net Zero Energy Settlements," Sustainability, MDPI, vol. 12(15), pages 1-13, July.
    4. Piselli, Cristina & Prabhakar, Mohit & de Gracia, Alvaro & Saffari, Mohammad & Pisello, Anna Laura & Cabeza, Luisa F., 2020. "Optimal control of natural ventilation as passive cooling strategy for improving the energy performance of building envelope with PCM integration," Renewable Energy, Elsevier, vol. 162(C), pages 171-181.
    5. 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.

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