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Corresponding Author

Fatma Ahmed Elbony

ORCID

0000-0001-6064-2556

Subject Area

Architectural Engineering

Article Type

Original Study

Abstract

Electrical lighting accounts for a significant contributor to total electrical energy consumption. Lighting has an energy effect that is not limited to the energy consumption of light fixtures. It also contributes significantly to the building's heat burden. WWR and glazing systems are the most significant factors that affect the electrical lighting and cooling energy consumption of a building. Reduction in WWR means a reduction in solar heat gains and accordingly in cooling energy consumption, otherwise it means increasing in lighting energy consumption. Nanogel windows as highly energy-efficient windows have the greatest potential for improving the thermal performance, daylight, and solar properties in the windows sector due to their high thermal insulation coefficient. The main objective of this paper is to discuss the effectiveness of implementing the recent innovations and technologies in glazing systems (Nanogel windows) in terms of daylighting and energy consumption with various Windows to Wall Ratio WWR. The final goal is to determine the appropriate WWR using this technology for office buildings in Egypt. An Energy Plus based simulation was carried out for an office building and the Nanogel glazing was implemented with different Window to Wall Ratio (WWR), 20%, 40%, and 49% (the base case), compared to the existing glazing one. It is found that, concerning the lighting and cooling energy consumption, the WWR 49% (the base case) is the best ratio with using Nanogel windows. It results in a considerable reduction in the building energy consumption reaches 7.18% (90204 KWh), 1.71% (5226 KWh), and 5.23% reductions in cooling loads, electric lighting and the total energy consumption respectively

Keywords

Daylighting, Window to Wall Ratio, Aerogel glazing, Energy Consumption, Energy Simulation Tool.

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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