Evaluating the Energy Efficiency of Green Roof Systems in Residential Buildings: A Case Study in Abuja, Nigeria
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Abstract
This study assesses the impact of green roof systems on electricity consumption in a residential building located in Abuja, Nigeria. Using empirical data from the Abuja Electricity Distribution Company (AEDC) in an existing building for instrument validation and simulation outputs from EnergyPlus via DesignBuilder, the research compares three roof scenarios: conventional, intensive green roof, and extensive green roof. Results reveal that buildings with extensive green roofs consistently exhibit the lowest monthly electricity demand, averaging below 700 kWh, while conventional roofs peak at over 940 kWh. A Pearson correlation coefficient of 1.000 between actual and simulated data confirms the reliability of the simulation model. The findings emphasise the energy-saving potential of green roofs, particularly extensive systems, in hot-humid climates and support their integration into sustainable building design strategies
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References
Abdurrahman, A. B., Aminua, S., Iyaa, A. M., Marafab, A. A., Yahayad, S. I., & Ayoosu, M. I. (2024). Window Glazing for Efficient Daylighting and Energy Saving in Tropical Climate. International Journal of Research Publication and Reviews, 5(5), 2704-2711.
Adewumi, A., Olu-lawal, K. A., Okoli, C. E., Usman, F. O., & Usiagu, G. S. (2024). Sustainable energy solutions and climate change: A policy review of emerging trends and global responses. World Journal of Advanced Research and Reviews, 21(2), 408-420.
Adilkhanova, I., Santamouris, M., & Yun, G. Y. (2024). Green roofs save energy in cities and fight regional climate change. Nature Cities, 1(3), 238-249.
Alkali, A. A., Mohammad, B. U., & Usman, H. A. (2024). Benefits of Integrating Green Architecture in Public Buildings within the Savannah Region of Nigeria: A Review. African Journal of Environmental Sciences and Renewable Energy, 15(1), 104-112.
Aule, T. T., Ayoosu, M. I., Anifowose, K. J., Nuhu, T. I., Agbodike, C. C., & Ikharia, S. I. (2024). Mapping Sustainable Trends in Modern Architecture for Nigeria: A Bibliometric and Scientometric Analysis AARCHESS Conference, Baze University, Abuja.
Aule, T. T., Jusan, M. B. M., Majid, R. B. A., & Ayoosu, M. I. (2021). Preliminary Framework on Application of Means-End Chain for Participatory Housing Personalisation International Graduate Conference of Built Environment and Surveying, Johor Bahru. https://builtsurvey.utm.my/project/conference-of-built-environment-and-surveying-2021-gbes-2021/
Ayoosu, M. I. (2016). Post Occupancy Evaluation of Daylighting in Libraries: An Experimental Approach. The International Journal Of Science & Technoledge, 4, 150-160.
Ayoosu, M. I., Lim, W.-Y., & Leng, P. C. (2020). Daylighting Performance Assessment of Side-Lit University Lecture Theatres in the Hot-Humid Climate of Makurdi in Nigeria. International Journal of Recent Technology and Engineering, 8(5), 4584-4589. https://doi.org/10.35940/ijrte.E6793.018520
Ayoosu, M. I., Lim, W.-Y., Leng, P. C., Aule, T. T., & Gabriel, K. E. (2020). Assessment of Passive Architectural Strategies for Natural Ventilation in Libraries within Hot-Humid Climate. International Journal of Scientific Research in Science, Engineering and Technology, 7(1), 60-72. https://doi.org/https://doi.org/10.32628/IJSRSET207111
Ayoosu, M. I., Utsaha, A. L., Gabriel, K. E., Vishigh, A. M. M., Tuleun, M. E., & Sen, I. G. (2025). Daylighting Performance Assessment: A Review of Methodologies. Path of Science, 11(1), 8001-8011.
Bellini, A., Bartoli, F., & Caneva, G. (2024). Extensive Green Roofs (EGRs) and the five Ws: a Quantitative analysis on the origin and evolution, aims, approaches, and botanical views. Sustainability, 16(3), 1033.
Cheshire, D. (2024). Regenerative by Design: Creating living buildings and cities. Routledge.
Drukker, E. F., Schranz, M. E., Vet, L. E., Voeten, J., Fatouros, N. E., & Quist, C. W. (2025). The development of insect diversity and ecosystem complexity on green roofs: A review. Insect Conservation and Diversity.
Kalu, G., & Ogunnaike, A. O. (2025). Integrating Biophilic and Passive Design Strategies in Nigerian Architecture: A Systematic Review of Current Practices and Impacts. African Journal of Environmental Sciences and Renewable Energy, 19(1), 324-335.
Leong, W. Y. (2025). Innovative Green Roofs and Vertical Gardens in Malaysian Architecture. The 10th scientific conference on "Applying new Technology in Green Buildings, The ATiGB 2025,
Li, J., Zhai, Z., Li, H., Ding, Y., & Chen, S. (2024). Climate change's effects on the amount of energy used for cooling in hot, humid office buildings and the solutions. Journal of cleaner production, 442, 140967.
Muratet, A., Barra, M., Hardion, L., & Chiron, F. (2024). Origins and drivers of roof plant assemblages: Designing green roofs for biodiversity conservation. Urban Forestry & Urban Greening, 94, 128247.
Nasr, Y., El Zakhem, H., Hamami, A. E. A., El Bachawati, M., & Belarbi, R. (2024). Comprehensive assessment of the impact of green roofs and walls on building energy performance: a scientific review. Energies, 17(20), 5160.
Onwuzuruike, E. J., Modi, S. Z., Martins, R. R., Ayoosu, I. M., & Abu, E. (2025). Simulation-Based Optimisation of External Plant Placement and Leaf Area Index for Building Indoor Thermal Comfort. Path of Science, 11(7), 3001-3009.
Qadourah, J. A. (2024). Energy efficiency evaluation of green roofs as a passive strategy in the mediterranean climate. Results in Engineering, 23, 102519.
Shao, Y., Yang, Z., Yan, Y., Yan, Y., Israilova, F., Khan, N., & Chang, L. (2025). Navigating Nigeria's path to sustainable energy: Challenges, opportunities, and global insight. Energy Strategy Reviews, 59, 101707.
Sijakovic, M., & Peric, A. (2021). Sustainable architectural design: towards climate change mitigation. Archnet-IJAR: International Journal of Architectural Research, 15(2), 385-400.
Unegbu, H., Yawas, D., Dan-asabe, B., & Alabi, A. (2024). Evaluating the Effectiveness of Green Roofs and Walls in Nigeria's Urban Centers.
Vogel, M. J. (2024). The Role of Green Roofs in Mitigating Urban Heat Islands in Berlin, Germany. Journal of Research in Social Science and Humanities, 3(11), 48-54.
Zou, Y., Wu, Z., Li, B., & Jia, Y. (2024). Cooling Energy Challenges in Residential Buildings During Heat Waves: Urban Heat Island Impacts in a Hot-Humid City. Buildings, 14(12), 4030.