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Application of Vertical Greenery Systems to Enhance Energy Efficiency in the Design of Mixed-Use Buildings in Hot-Humid Climates

Chukwunonso Anthony Mokwe, Modi Sule Zango, Dogara Olusola Ayanajeh

Abstract

This study investigates the impact of Vertical Greenery Systems (VGS) on energy efficiency in mixed-use buildings within the hot-humid climate of Abuja, Nigeria. Through a comparative analysis of a one-bedroom apartment model with and without VGS, this research evaluates energy consumption, cooling loads, and indoor thermal comfort over a year. Results demonstrate that VGS significantly reduces monthly energy demand, with system loads consistently lower than those in non-VGS scenarios. Sub-hourly cooling load data for a typical day (April 15th) reveals peak loads reduced by nearly 50% with VGS, highlighting its effectiveness in mitigating heat gain. Additionally, annual indoor operative temperature and relative humidity data indicate improved thermal comfort with VGS, with peak temperatures often below 30°C and slightly reduced humidity levels. These findings underscore VGS as a sustainable design strategy for reducing reliance on mechanical cooling, enhancing energy efficiency, and promoting environmentally responsible building practices in challenging climates.

Keywords

Hot-Humid ClimatesMixed-Use BuildingsNigeriaSustainabilityVertical

References

Alexandri, E., & Jones, P. (2008). Temperature decreases in an urban canyon due to green walls and green roofs in diverse climates. Building and Environment, 43(4), 480–493. Aziz, A., & Ismail, L. H. (2011). Green walls: A sustainable approach to climate change mitigation in tropical cities. Journal of Sustainable Development, 4(5), 191–198. Chen, Q., Li, B., & Liu, K. (2013). Experimental study on the thermal performance of vertical greenery systems in a tropical climate. Energy and Buildings, 66, 379–387. Coma, J., Pérez, G., Solé, C., Castell, A., & Cabeza, L. F. (2017). Thermal assessment of extensive green roofs and vertical greenery systems in a Mediterranean climate. Building and Environment, 123, 284–297. Dahanayake, K. C., & Chow, C. L. (2017). Moisture and thermal performance of green walls in tropical climates. Journal of Building Engineering, 12, 164–170. Jim, C. Y., & He, J. (2011). Coupling heat flux dynamics with meteorological conditions in the green roof ecosystem. Ecological Engineering, 37(1), 1–9. Mazzali, U., Peron, F., Romagnoni, P., Pulselli, R. M., & Bastianoni, S. (2013). Experimental investigation on the energy performance of living walls in a temperate climate. Building and Environment, 64, 57–66. Ottelé, M., Perini, K., Fraaij, A. L. A., Haas, E. M., & Raiteri, R. (2011). Comparative life cycle analysis for green façades and living wall systems. Energy and Buildings, 43(12), 3419–3429. Perini, K., Ottelé, M., Fraaij, A. L. A., Haas, E. M., & Raiteri, R. (2011). Vertical greening systems and the effect on air flow and temperature on the building envelope. Building and Environment, 46(11), 2287–2294. Pérez, G., Coma, J., Martorell, I., & Cabeza, L. F. (2014). Vertical Greenery Systems (VGS) for energy saving in buildings: A review. Renewable and Sustainable Energy Reviews, 39, 139–165. Safikhani, T., Abdullah, A. M., Ossen, D. R., & Baharvand, M. (2014). A review of energy characteristic of vertical greenery systems. Renewable and Sustainable Energy Reviews, 40, 450–462. Susorova, I., Angulo, M., Bahrami, P., & Stephens, B. (2013). A model of vegetative cladding for thermal performance evaluation. Energy and Buildings, 66, 326–335. Tan, C. L., Tan, P. Y., Wong, N. H., Takasuna, H., Kudo, T., & Tsang, Y. S. (2014). The impact of vertical greenery systems on cooling loads in high-rise buildings. Building and Environment, 82, 313–321. Wong, N. H., Tan, A. Y. K., Chen, Y., Sekar, K., Tan, P. Y., Chan, D., ... & Vidot, A. (2010). Thermal evaluation of vertical greenery systems for building walls. Building and Environment, 45(3), 663–672.

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