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Building and Urban Cooling Performance Indexes of Wetted and Green Roofs—A Case Study under Current and Future Climates

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  • Madi Kaboré

    (LaSIE (UMR CNRS 7356), La Rochelle University, Av. M. Crépeau, 17042 La Rochelle, France
    DE/IRSAT/CNRST, Ouagadougou 03 BP 7047, Burkina Faso)

  • Emmanuel Bozonnet

    (LaSIE (UMR CNRS 7356), La Rochelle University, Av. M. Crépeau, 17042 La Rochelle, France)

  • Patrick Salagnac

    (LaSIE (UMR CNRS 7356), La Rochelle University, Av. M. Crépeau, 17042 La Rochelle, France)

Abstract

We developed and studied key performance indexes and representations of energy simulation heat fluxes to evaluate the performance of the evaporative cooling process as a passive cooling technique for a commercial building typology. These performance indexes, related to indoor thermal comfort, energy consumption and their interactions with their surrounding environments, contribute to understanding the interactions between the urban climate and building for passive cooling integration. We compare the performance indexes for current and future climates (2080), according to the highest emission scenario A2 of the Special Report on Emission Scenario (SRES). Specific building models were adapted with both green roof and wetted roof techniques. The results show that summer thermal discomfort will increase due to climate change and could become as problematic as winter thermal discomfort in a temperate climate. Thanks to evapotranspiration phenomena, the sensible heat contribution of the building to the urban heat island (UHI) is reduced for both current and future climates with a green roof. The performance of the vegetative roof is related to the water content of the substrate. For wetted roofs, the impacts on heat transferred to the surrounding environment are higher for a Mediterranean climate (Marseille), which is warmer and drier than the Paris climate studied (current and future climates). The impact on indoor thermal comfort depends on building insulation, as demonstrated by parametric studies, with higher effects for wetted roofs.

Suggested Citation

  • Madi Kaboré & Emmanuel Bozonnet & Patrick Salagnac, 2020. "Building and Urban Cooling Performance Indexes of Wetted and Green Roofs—A Case Study under Current and Future Climates," Energies, MDPI, vol. 13(23), pages 1-16, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:23:p:6192-:d:450768
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    References listed on IDEAS

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    1. Céline Guivarch & Christophe Cassen, 2015. "L'atténuation du changement climatique : retour sur le 5e rapport du Giec," Post-Print halshs-01128526, HAL.
    2. A. Lemonsu & Vincent Viguie & M. Daniel & V. Masson, 2015. "Vulnerability to heat waves: Impact of urban expansion scenarios on urban heat island and heat stress in Paris (France)," Post-Print hal-01695088, HAL.
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    Cited by:

    1. Carlos J. Esparza-López & Carlos Escobar-del Pozo & Karam M. Al-Obaidi & Marcos Eduardo González-Trevizo, 2022. "Improving the Thermal Performance of Indirect Evaporative Cooling by Using a Wet Fabric Device on a Concrete Roof in Hot and Humid Climates," Energies, MDPI, vol. 15(6), pages 1-18, March.
    2. Yang, Yuchen & Javanroodi, Kavan & Nik, Vahid M., 2021. "Climate change and energy performance of European residential building stocks – A comprehensive impact assessment using climate big data from the coordinated regional climate downscaling experiment," Applied Energy, Elsevier, vol. 298(C).

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