Evaluation of a Green Roof for Heat Mitigation in a Building Located in a City with a Hot and Humid Climate

Abstract:

The expansion of the urban population has contributed to the formation of urban agglomerates; whose spatial morphology favors the formation of heat islands. The installation of Green Roofs (GR) is a strategy that can be applied to mitigate the effects of this phenomenon, especially in regions lacking vegetation cover. The objective of this paper is to evaluate, through Computational Fluid Dynamics (CFD), the potential to reduce the internal temperature of a building located in the city of Rio de Janeiro, Brazil. The temperatures of the inner surface of the roof were measured in two buildings, one with GR and one without GR. This information was used as input data into Solidworks software to simulate the heat distribution inside the building. Results indicated that the temperature was reduced by about 2°C in the building with GR, proving the technology's effectiveness, notably in the hottest months of the year.

• Periodical: Materials Science Forum (Volume 1073)
• Pages: 169-174
• DOI: https://doi.org/10.4028/p-98200n
• Online since: October 2022
• Authors: Vinicius C. Cardoso, Gabriel S.S. Louro, Ananda A. Stroke, Isabela M. Assumpção, George V. Brigagão, Bruno B.F. da Costa*
• Keywords: CFD, Green Roof, Thermal Comfort, Urban Heat Islands

References

[1] Z. Shen, X. Xu, S. Xu, and D. Sun. A comparative study of land development patterns and regional thermal environments (RTEs) in typical urban agglomerations of China and America: A case study of Beijing-Tianjin-Hebei (BTH) and Boswash. Sci. Total Environ. Vol. 803, (2022), 149735. doi: https://doi.org/10.1016/j.scitotenv.2021.149735.

DOI: 10.1016/j.scitotenv.2021.149735

[2] M.Y. Joshi and J.Teller. Urban integration of green roofs: Current challenges and perspectives. Sustainability. Vol. 13, (2021), 12378. doi: https://doi.org/10.3390/su132212378.

DOI: 10.3390/su132212378

[3] J. Wang, A. Garg, S. Huang, G. Mei, J. Liu, K. Zhang, and L. Gan. The rainwater retention mechanisms in extensive green roofs with ten different structural configurations. Water Sci. Technol.. Vol. 84(8), (2021), 1839. doi: https://doi.org/10.2166/wst.2021.413.

DOI: 10.2166/wst.2021.413

[4] S.N. Ma'bdeh, H.H. Ali, and I.O. Rabab'ah. Sustainable assessment of using green roofs in hot-arid areas – Residential buildings in Jordan. J. Build. Eng. Vol. 45, (2022), 103559. doi: https://doi.org/10.1016/j.jobe.2021.103559.

DOI: 10.1016/j.jobe.2021.103559

[5] K. McConnell, C.V. Braneon, E. Glenn, N. Stamler, E. Mallen, D.P. Johnson, R. Pandya, J. Abramowitz, G. Fernandez, and C. Rosenzweig. A quasi-experimental approach for evaluating the heat mitigation effects of green roofs in Chicago, Illinois. Sustain. Cities Soc. Vol. 76, (2022), 103376. doi: https://doi.org/10.1016/j.scs.2021.103376.

DOI: 10.1016/j.scs.2021.103376

[6] P. Stella and E. Personne. Effects of conventional, extensive and semi-intensive green roofs on buildings conductive heat fluxes and surface temperatures in winter in Paris. Build. Environ. Vol. 205, (2021), 108202. doi: https://doi.org/10.1016/j.buildenv.2021.108202.

DOI: 10.1016/j.buildenv.2021.108202

[7] E. Jamei, H.W. Chau, M. Seyedmahmoudian, and A. Stojcevski. Review on the cooling potential of green roofs in different climates. Sci. Total Environ. Vol. 791, (2021), 148407. doi: https://doi.org/10.1016/j.scitotenv.2021.148407.

DOI: 10.1016/j.scitotenv.2021.148407

[8] M. Lin, J. Dong, L. Jones, J. Liu, T. Lin, J. Zuo, H. Ye, G. Zhang, and T. Zhou. Modeling green roofs' cooling effect in high-density urban areas based on law diminishing marginal utility of the cooling efficiency: A case study of Xiamen Island, China. J. Clean. Prod. Vol. 316, (2021), 128277. doi: https://doi.org/10.1016/j.jclepro.2021.128277.

DOI: 10.1016/j.jclepro.2021.128277

[9] M. Kazemi, L. Courard, and J. Hubert. Coarse recycled materials for the drainage and substrate layers of green roof system in dry condition: Parametric study and thermal heat transfer. J. Build. Eng. Vol. 45, (2022), 103487. doi: https://doi.org/10.1016/j.jobe.2021.103487.

DOI: 10.1016/j.jobe.2021.103487

[10] M. Yang, W. Dong, R. Cheng, H. Eang, Z. Zhao, F. Wang, and Y. Wang. Effect of highly efficient substrate modifier, super-absorbent polymer, on the performance of the green roof. Sci. Total Environ. Vol. 806, (2022), 150638. doi: https://doi.org/10.1016/j.scitotenv.2021.150638.

DOI: 10.1016/j.scitotenv.2021.150638

[11] E.I.F. Wooster, R. Fleck, F. Torpy, D. Ramp, and P.J. Irga. Urban green roofs promote metropolitan biodiversity: A comparative case sudy. Build. Environ. Vol. 207, (2022), 108458. doi: https://doi.org/10.1016/j.buildenv.2021.108458.

DOI: 10.1016/j.buildenv.2021.108458

[12] P. Bevilacqua. The effectiveness of green roofs in reducing building energy consumptions across different climates. A summary of literature results. Renew. Sust. Energ. Rev. Vol. 151, (2021), 111523. doi: https://doi.org/10.1016/j.rser.2021.111523.

DOI: 10.1016/j.rser.2021.111523

[13] M. Porcaro, F. Comino, T. Vanwalleghem, and M.R. de Adana. Exploring the reduction of energy demand of a building with an eco-roof under different irrigation strategies. Sustain. Cities Soc. Vol. 74, (2021), 103229. doi: https://doi.org/10.1016/j.scs.2021.103229.

DOI: 10.1016/j.scs.2021.103229

[14] G.B. Cavadini and L.M. Cook. Green and cool roof choices integrated into rooftop solar energy modelling. Appl. Energy. Vol. 296, (2021), 117082. doi: https://doi.org/10.1016/j.apenergy. 2021.117082.

DOI: 10.1016/j.apenergy.2021.117082

[15] P. Ramasubramanian, I. Luhung, S.B.Y. Lim, S.C. Schuster, O. Starry, and E.T. Gall. Impact of green and white roofs on air handler filters and indoor ventilation air. Build. Environ. Vol. 197, (2021), 107860. doi: https://doi.org/10.1016/j.buildenv.2021.107860.

DOI: 10.1016/j.buildenv.2021.107860

[16] L. Cirrincione, A. Marvuglia, and G. Scaccianoce. Assessing the effectiveness of green roofs in enhancing the energy and indoor comfort resilience of urban buildings to climate change: Methodology proposal and application. Build. Environ. Vol. 205, (2021), 108198. doi: https://doi.org/10.1016/j.buildenv.2021.108198.

DOI: 10.1016/j.buildenv.2021.108198

[17] M. Viecco, H. Jorquera, A. Sharma, W. Bustamante, H.J.S. Fernando, and S. Vera. Green roofs and green walls layouts for improved urban air quality by mitigating particulate matter. Build. Environ. Vol. 204, (2021), 108120. doi: https://doi.org/10.1016/j.buildenv.2021.108120.

DOI: 10.1016/j.buildenv.2021.108120