Building Optimisation Vis-À-Vis Solar Shading for Improved Comfort and Energy Efficiency in Classrooms

Authors

  • Mark Alegbe Department of Architectural Technology, Federal Polytechnic Auchi
  • Lawrence Chukwuemeka C.Lawrence and Partners, Maple Court
  • John Lekwauwa Kalu Department of Architectural Technology, Federal Polytechnic Auchi https://orcid.org/0009-0004-2206-8142
  • Amaka Eke-Nwachukwu Department of Architectural Technology, Federal Polytechnic Auchi

:

https://doi.org/10.9744/dimensi.50.2.53-68

Keywords:

building optimisation, hybrid ventilation, solar radiation

Abstract

Excessive solar radiation negatively affects classroom occupants' perfor­mance and thermal comfort, especially in buildings with West and East-facing glazed openings. This study utilises fixed external shading devices and triple-glazed low-emissivity windows to optimise a classroom building in Nigeria. Employing hybrid ventilation mode in EnergyPlus simulations, the optimised model shows a 44% reduction in discomfort hours, a 23% decrease in cooling load, and a 16% drop in energy demand compared to the original design. Comparative analysis of the optimised model with the as-built and West-East oriented classroom reveals a 16% and 10% reduction in energy consumption per conditioned area, along with 56 KWh/m² and 32 KWh/m² savings in cooling demand, respectively. Despite the effectiveness of fixed shading in curbing solar gains, occasional glare persists. This research underscores that shading alone may not fully meet thermal comfort requirements, emphasising the importance of building fabrics, building orientation and climate-sensitive design.

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Published

2023-12-19

How to Cite

Alegbe, M., Chukwuemeka, L., Lekwauwa Kalu, J., & Eke-Nwachukwu, A. (2023). Building Optimisation Vis-À-Vis Solar Shading for Improved Comfort and Energy Efficiency in Classrooms. Dimensi: Journal of Architecture and Built Environment, 50(2), 53-68. https://doi.org/10.9744/dimensi.50.2.53-68

Issue

Vol. 50 No. 2 (2023): DECEMBER 2023

Section

Articles

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