ISSN:
Website: www.jomc.vn
Optimizing energy performance of office buildings using high-performance glazing: Solar Control and Low-E glass
Abstract
The selection of glazing materials has a direct impact on the energy efficiency of buildings, especially in hot and humid tropical climates such as that of Vietnam. This paper presents the results of an energy simulation for an industrial office building using two types of high-performance glazing: Solar Control Dark Grey T25 and Low-E Neutral T40. The study focuses on the influence of the building envelope on energy-saving potential, represented by Energy Use Intensity (EUI). DesignBuilder software was employed to simulate six scenarios with varying parameters, including building orientation, window-to-wall ratio (WWR), and air conditioning setpoint temperature. The findings reveal that employing Solar Control glass in a north-oriented building, with a 45 % window-to-wall ratio and an air conditioning setpoint temperature of 26,5 °C, results in the most efficient energy performance, achieving more than 5,2 % savings compared to the original model. Scenarios using Low-E glass also demonstrated high performance and achieved the maximum score under the LOTUS green building rating system. This study highlights the significant potential of high-performance glazing in reducing operational energy consumption and enhancing building sustainability.
References
- International Energy Agency (IEA), Energy Efficiency 2022: Analysis and Outlooks to 2030, Paris: IEA, 2022. [Trực tuyến]. Địa chỉ: https://www.iea.org/reports/energy-efficiency-2022. [Truy cập 20/03/2025].
- International Energy Agency (IEA), Transitioning to Zero-Emission Buildings: Global Status Report 2022, Paris: IEA, 2022.
- Nguyễn A. T., Nguyễn X. T., và L. X. Hiếu, “Định mức năng lượng công trình – Bước khởi đầu hướng đến Kiến trúc tiết kiệm năng lượng,” Tạp chí Kiến trúc, 2017.
- M. Najjar, K. Figueiredo, A. W. A. Hammad, and A. Haddad, “Integrated optimization with building information modeling and life cycle assessment for generating energy efficient buildings,” Applied Energy, vol. 250, pp. 1366–1382, Sep. 2019.
- S. Jelle et al., “Fenestration of today and tomorrow: A state-of-the-art review and future research opportunities,” Solar Energy Materials and Solar Cells, tập 96, tr. 1–28, 2012.
- W. N. Hien, T. Yik Fong, and Y. Bong Tai, “Impact of high-performance glazing on cooling load reduction in office buildings in tropical climates,” Building and Environment, vol. 42, no. 9, pp. 3682–3690, 2007.
- N. Jain và S. N. Garg, “Energy performance assessment of different fenestration glazing systems using EnergyPlus for Indian climate,” International Journal of Sustainable Built Environment, vol. 5, no. 2, pp. 412–423, 2016.
- U.S. Department of Energy, EnergyPlus Engineering Reference: The Reference to EnergyPlus Calculations, Version 23.1, 2023. [Trực tuyến]. Địa chỉ: https://energyplus.net/documentation. [Truy cập 20/03/2025].
- R. Choudhary, A. Chauhan, and S. Arora, “Energy simulation-based evaluation of high-performance glazing systems for cooling energy savings in tropical climate,” Energy and Buildings, vol. 172, pp. 486–498, 2018.
- Vietnam Green Building Council (VGBC), “LOTUS Rating Tools,” Vietnam Green Building Council, 2020. [Trực tuyến]. Địa chỉ: https://vgbc.vn/en/lotus-rating-tools/. [Truy cập 20/03/2025].
- International Finance Corporation (IFC), “EDGE - Excellence in Design for Greater Efficiencies,” IFC Green Building Program, 2023. [Trực tuyến]. Địa chỉ: https://edgebuildings.com/. [Truy cập 20/03/2025].
- U.S. Green Building Council (USGBC), “LEED Rating System,” U.S. Green Building Council, 2023. [Trực tuyến]. Địa chỉ: https://www.usgbc.org/leed. [Truy cập 20/03/2025].
- W. W. Norton and L. H. Lee, Fundamentals of Heat and Mass Transfer, 8th ed., Hoboken, NJ, USA: John Wiley & Sons, 2017.
- LBNL, “Window Performance Ratings: U-Factor, SHGC, VT,” Lawrence Berkeley National Laboratory - Windows and Daylighting Group. [Trực tuyến]. Địa chỉ: https://windows.lbl.gov. [Truy cập 20/03/2025].
- DesignBuilder Software Ltd., DesignBuilder Software v7.3 – User Manual, Stroud, UK: DesignBuilder Software Ltd., 2025. [Trực tuyến]. Địa chỉ: https://designbuilder.co.uk/helpv7.3/Content/_Index.htm. [Truy cập 20/03/2025].
- AGC Asia Pacific, “Glass Product Data Sheet – Solar Control Dark Grey T25 and Low-E Neutral T40,” AGC Asia Pacific, 2022. [Trực tuyến]. Địa chỉ: https://www.agc-asiapacific.com/. [Truy cập 20/03/2025].
- T. T. Nguyen, H. D. Le, and M. Yamada, "Energy Consumption Benchmarking for Office Buildings in Hanoi," Proc. 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2018, pp. 122–127. doi: 10.1109/APPEEC.2018.8568863.
- V. D. Tran and T. K. Pham, "Energy performance evaluation of high-rise office buildings in Ho Chi Minh City," Vietnam Journal of Science and Technology, vol. 57, no. 4A, pp. 56–63, 2019.
- Ministry of Industry and Trade of Vietnam, “Energy Efficiency Benchmarking Report for Industrial Sector,” Hanoi, Vietnam, 2021. [Trực tuyến]. Địa chỉ: https://vneec.gov.vn/. [Truy cập 20/03/2025].
- Bộ Xây dựng, QCVN 09:2017/BXD – Quy chuẩn kỹ thuật quốc gia về các công trình sử dụng năng lượng hiệu quả, Hà Nội, Việt Nam: Nhà xuất bản Xây dựng, 2017.

