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Optimization Strategies for the Envelope of Student Dormitories in Hot Summer and Cold Winter Regions: Multi-Criteria Assessment Method

Author

Listed:
  • Fangyuan Xie

    (College of Water Resources and Civil Engineering, Hunan Agricultural University, Changsha 410128, China)

  • Yi Wu

    (College of Water Resources and Civil Engineering, Hunan Agricultural University, Changsha 410128, China)

  • Xinqi Wang

    (College of Water Resources and Civil Engineering, Hunan Agricultural University, Changsha 410128, China)

  • Xiling Zhou

    (College of Water Resources and Civil Engineering, Hunan Agricultural University, Changsha 410128, China)

Abstract

Energy consumption in student dormitories, key living and study spaces, is a major concern for institutions and communities. This paper proposes a multi-objective optimization model to address the issue of incomplete single-dimensional analysis in existing research. Firstly, optimization was conducted separately for the external walls, windows, and roof to study different parts of the building envelope. Secondly, a student dormitory in a hot summer and cold winter region was used for a comprehensive optimization analysis. The study compared energy consumption, carbon emissions, and costs with the original building, showing a 31.79% reduction in energy savings (ESR), while carbon emission savings (CESR) and cost savings (CSR) increased by 57.18% and 15.58%. This study highlights the importance of selecting appropriate window configurations for sustainability. Optimized thermally broken Low-E glass windows save 5.6% in annual energy consumption compared to aluminum alloy double-glazed windows, with only a 0.03% increase in energy consumption and a 4.49% rise in costs. Long-term, optimized windows provide greater positive feedback for energy efficiency. This case study offers insights for retrofitting buildings with good wall performance but poor window performance and emphasizes the comprehensive decision-making authority of designers and policymakers in sustainable renovations.

Suggested Citation

  • Fangyuan Xie & Yi Wu & Xinqi Wang & Xiling Zhou, 2024. "Optimization Strategies for the Envelope of Student Dormitories in Hot Summer and Cold Winter Regions: Multi-Criteria Assessment Method," Sustainability, MDPI, vol. 16(14), pages 1-27, July.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:14:p:6172-:d:1438327
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    References listed on IDEAS

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    2. Chi, Fang'ai & Xu, Ying, 2022. "Building performance optimization for university dormitory through integration of digital gene map into multi-objective genetic algorithm," Applied Energy, Elsevier, vol. 307(C).
    3. Shadram, Farshid & Bhattacharjee, Shimantika & Lidelöw, Sofia & Mukkavaara, Jani & Olofsson, Thomas, 2020. "Exploring the trade-off in life cycle energy of building retrofit through optimization," Applied Energy, Elsevier, vol. 269(C).
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