Determining the threshold for variation in indoor temperature reduction capacity of green roofs with different depths in hot and dry climates
Keywords:
Extensive green roof, Heat transfer, Thermal Insulation, Temperature ProfileAbstract
To forestall the dangers of overdesign, initial and maintenance costs, and unnecessary loading on the supporting roof, the study was primarily aimed at determining the significant difference in indoor temperature reduction capacity between various green roof models of varying thicknesses within the extensive green roof category. Using a contextualized substrate layer of 25mm as the difference in depth between green roof alternatives, the degree of thermal insulation for the interior was observed on six extensive green roof models of 50mm, 75mm, 100mm, 125mm, and 150mm thicknesses. This is to elucidate the level of significant differences in thermal efficiency between the models. EnergyPlus 8.3.0 simulation software was used to conduct a thermal performance survey on the sampled models. The temperature profiles of all the cases were collected and subjected to statistical analysis using SPSS V 21.0 to conduct an ANOVA and a proceeding Post hoc test to determine where the difference lies between the green roof groups. The results revealed that; no substantial difference in thermal performance exists between alternatives where the difference in depth is around the 25mm mark. Revealing that the threshold for any significant change in thermal insulation is denoted by a 50mm difference between alternatives. This research was carried out to facilitate the initial process of green roof selection, design, detailing, and specifications writing for architect engineers, and other stakeholders.References
Alim, M. A., Rahman, A., Tao, Z., Garner, B., Griffith, R., & Liebman, M. (2022). Green roof as an effective tool for sustainable urban development: An Australian perspective in relation to stormwater and building energy management. Journal of Cleaner Production, 362, 132561.
American Society for Testing and Materials (ASTM E 2400) 2014. Standard Guide for Selection, Installation, and Maintenance of Plants for Green Roof Systems. ASTM International, West Conshohocken, PA, 4. Energy and Buildings., 115, 411–428.
Baciu, I. R., Taranu, N., Isopescu, D. N., Lupu, M. L., Dragan, T. C., & Maxineasa, S. G. (2020, March). Green roofs–modern solutions for greening buildings. In IOP Conference Series: Materials Science and Engineering. Vol. 789, No. 1, p. 012001. IOP Publishing.
Barrio, E. P. D. (1998). Analysis of the green roofs cooling potential in buildings. Energy and Buildings. Volume 27(2), pp179-193. Retrieved from https://www.researchgate.net/publication/223880039
Becker, D., and Wang, D. (2011). Green Roof Heat Transfer and Thermal Performance. (Unpublished Master’s Thesis) Mellon University, Carnegie. The United States. Retrieved from https://iglcstorage.blob.core.windows.net/papers/attachmenta0281368-3309-4474-9abf-fcfc56b9f8d9.
Berardi, U., and G. Hoseini, (2014). State-of-the-art analysis of the environmental benefits of green
roofs. Energy and Buildings. Retrieved from journal homepage: www.elsevier.com/locate/enbuild, 115, 411–428.
Besir, A. B., & Cuce, E. (2018). Green roofs and facades: A comprehensive review. Renewable
and Sustainable Energy Reviews, 82, 915-939.
Catalano, C., Armando, V., Badalucco, L., and Guarino, R. (2018). Some European green roof norms and guidelines through the lens of biodiversity. Ecological Engineering, 115(October 2017), pp15–26. https://doi.org/10.1016/j.ecoleng.2018.01.006
Cascone, S. (2019). Green Roof Design: State of the Art on Technology and Materials. Sustainability. Volume 11/3020. Pp 2-28. Retrieved from https://doi.org/10.3390/su11113020 on 22/10/2021 doi:10.3390/su11113020
Cardoso, T.G., and Vecchia, F. (2013). Thermal Behavior of Green Roofs Applied to Tropical Climate. Journal of Construction Engineering, (2), pp1–7. https://doi.org/10.1155/2013/940386
Du, P., Arndt, S. K., & Farrell, C. (2018). Relationships between plant drought response, traits and climate of origin for plant selection. Ecological Applications. Volume 28(7), pp. 1752–1761 https://doi.org/10.1002/eap.1782
Dunnett, N. and Kingsbury, N. (2004). Planting Green Roofs and Living Walls.: Timber Press,
Portland.
Dvorak, B., & Bousselot, J. (2021). Theoretical development of ecoregional green roofs. Ecoregional Green Roofs: Theory and Application in the Western USA and Canada, 41-79.
Haves, P., and Berkeley, L. (2017). Validation and Uncertainty Characterization for Energy Simulation. 2017 Building Technologies Office Peer Review, US Department of Energy. Lawrence Berkeley National Laboratory.
He, Y., Yu, H., Ozaki, A., & Dong, N. (2020). Thermal and energy performance of green roofs and Cool Roof: A comparison study in Shanghai area. Journal of Cleaner Production, 267.
Hegazy, A., Dabaieh, M., Wanas, O., Amer, M., and Johansson, E. (2016). Reducing cooling demands in a hot dry climate: A simulation study for non-insulated passive cool roof thermal performance in residential buildings Reducing cooling demands in a hot dry climate. Energy and Buildings. 89, 142-152. DOI: 10.1016/j.enbuild.2014.12.034
Hui, S. C. M. (2006). Benefits and potential applications of green roof systems in Hong Kong. Proceedings of the 2nd Megacities International Conference 2006.
Guangzhou China. pp. 351-360. Retrieved from http://hdl.handle.net/10722/100487
Kazman, R., and Klein, M. (2002). Making Architecture Design Decisions: An Economic Approach. Carnegie Mellon University.
Kim, J., Kim, J., Hong, T., and Koo, C. (2012). Economic and Environmental Evaluation Model for Selecting the Optimum Design of Green Roof Systems in Elementary Schools. Environmental Science & Technology. vol-ume 46, pp8475−8483. https://doi.org/10.1021/es2043855
Lambrinos, J.G., (2015). Green Roof Ecosystems, Ecological Studies, Analysis and Synthesis. vol. 223. Springer.
Langemeyer, J. Wedgwood, D. McPhearson, T. Baró, F. Madsen, A.L. Barton, D.N. (2020). Creating urban green infrastructure where it is needed – A spatial ecosystem service-based decision analysis of green roofs in Barce-lona, Sci. Total Environ. 707 (2020) 135487, https://doi.org/10.1016/j.scitotenv.2019.135487.
Mihalakakou, G., Souliotis, M., Papadaki, M., Menounou, P., Dimopoulos, P., Kolokotsa, D., & Papaefthimiou, S. (2023). Green roofs as a nature-based solution for improving urban sustainability: Progress and perspectives. Renewable and Sustainable Energy Reviews, 180, 113306.
Mohapatra, S., Verma, S., Chowdhury, S., Dwivedi, G., & Harish, V. S. K. V. (2021). A critical appraisal of green vegetated roofs: Energy and environment in focus. Materials Today: Proceedings, 46, 5703-5710.
Morau, D., Rakotondramiarana, H. T., and Ranaivoaarrisoa, T. F. (2015). Dynamic Simulation of the Green Roofs Impact on Building Energy Performance, Case Study of Antananarivo, Madagascar. 2nd International Confer-ence on Advances in Energy Engineering (ICAEE. Pp 497–520. https://doi.org/10.3390/buildings5020497
National Building Code (2006). Ministery of Housing and Urban Development Federal Republic of Nigeria Na-tional Building Code. First edition. LexisNexis. Johannesburg, South Africa Peng, L. L. H., and Jim, C. Y. (2015). Seasonal and diurnal thermal performance of a subtropical extensive green roof: The impacts of back-ground weather parameters. Sustainability Switzerland. Volume 7(8), 11098–11113. https://doi.org/10.3390/su70811098
Pettersson Skog, A., Malmberg, J., Emilsson, T., Jägerhök, T., & Capener, C. M. (2016). Gröna takhandboken: växt-bädd och vegetation.
Petreje, M., Sněhota, M., Chorazy, T., Novotný, M., Rybová, B., & Hečková, P. (2023). Performance study of an innovative concept of a hybrid constructed wetland-extensive green roof with growing media amended with recycled materials. Journal of Environmental Mgt, 331, 117151
Polo-Labarrios, M. A., Quezada-García, S., Sánchez-Mora, H., Escobedo-Izquierdo, M. A., & Espinosa-Paredes, G. (2020). Comparison of thermal performance between green roofs and conventional roofs. Case Studies in Thermal Engineering, 21, 100697.
Poptani, H. (2014). Extensive Green Roofs: Potential for Thermal and Energy benefits in buildings in central India. 30th International Plea Conference 16-18 December 2014, CEPT University, Ahmedabad. pp 1–8. Retrieved from https://www.researchgate.net/publication/281551485_Extensive_Green_Roofs_Pot en-tial_for_Thermal_and_Energy_benefits_in_buildings_in_central_India
Raji, B., Tenpierik, M. J., and van den Dobbelsteen, A. A. J. F. (2015). The impact of greening systems on building energy performance: A literature review. Renewable and Sustainable Energy Reviews. Volume 45. pp610-623. DOI: 10.1016/j.rser.2015.02.011
Rizzo, G., Cirrincione, L., La Gennusa, M., Peri, G., & Scaccianoce, G. (2023). Green roofs’ end of life: a literature review. Energies, 16(2), 596.
Salihu, M.M. (2021). A Framework for Green Roof Design Optimised for Reduction of Cooling Load for Residen-tial Buildings in the Hot-Dry Climate of Nigeria (Unpublished PhD Thesis). Department Of Architecture, Faculty of Environmental Design, Ahmadu Bello University, Zaria, Nigeria.
Salihu, M.M., Salisu, A. S. and Tukur R. B., (2020). A Field Study on Thermal Insulation Performance of Green Roof in Buildings of Hot Dry Climate of Zaria, Nigeria. Journal of Environmental Studies. VOL. 4 issue 11 pp 14-24 ISSN 1110- 457X
Schweitzer, O., and Erell, E. (2014). Evaluation of the energy performance and irrigation requirements of extensive green roofs in a water-scarce Mediterranean climate. Energy and Buildings. Volume 68. Pp 25–32. http://dx.doi.org/10.1016/j.enbuild.2013.09.012
Speak, A. F. (2013). Quantification of the Environmental Impacts of Urban Green Roofs. (Unpublished PhD The-sis). The University of Manchester. The United Kingdom.
Speak, A.F. Rothwell, J.J. Lindley, S.J. Smith, C.L. (2013). Reduction of the urban cooling effects of an intensive green roof due to vegetation damage, Urban Clim. 3 (2013) 40–55, https://doi.org/10.1016/j.uclim.2013.01.001.
Zhang, Z. Szota, C. Fletcher, T.D. Williams, N.S. Werdin, J. Farrell, C. (2018). Influence of plant composition and water use strategies on green roof stormwater retention, Sci.Total Environ. 625 (2018) 775–781.
Yilmaz, D., Sabre, M., Lassabat` ere, L., Dal, M., Rodriguez, F., 2016. Storm water retention and actual evapotran-spiration performances of experimental green roofs in French oceanic climate. Eur. J. Environ. Civ. Eng. 20 (3), 344–362.
Wong, N. H.; Chen, Y.; Ong, C. L.; Sia, A. (2003) Investigation of Thermal Benefits of Rooftop Garden in the Tropical Environment. Building and Environment. 38(261), 78-89
Wooster, E. I. F., Fleck, R., Torpy, F., Ramp, D., & Irga, P. J. (2022). Urban green roofs promote metropolitan bio-diversity: A comparative case study. Building and Environment, 207, 108458.
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