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Investigating the Energy-Saving Effectiveness of Envelope Retrofits and Photovoltaic Systems: A Case Study of a Hotel in Urumqi

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  • Xiaomiao Liao

    (School of Architecture and Engineering, Xinjiang University, Urumqi 830049, China)

  • Wanjiang Wang

    (School of Architecture and Engineering, Xinjiang University, Urumqi 830049, China)

  • Yihuan Zhou

    (School of Architecture and Engineering, Xinjiang University, Urumqi 830049, China)

Abstract

Many of China’s older buildings, built in the 1970s and 1980s, faces several indoor temperature and heating energy consumption problems. Based on an investigation and analysis of an old hotel in Urumqi, this paper proposes a renovation plan to improve the indoor temperature and reduce the heating energy consumption, thereby introduce a sustainable development strategy for the winter. The effects of different renovation plans on the hotel were simulated using DesignBuilder and PVsyst software. The results show that improving the insulation performance of the building envelope, including reforming the roof, exterior wall, doors, and windows and adjusting the window-to-wall ratio, is the primary way to improve indoor temperature and reduce heating energy consumption in winter. If economic conditions allow, we can also install photovoltaic systems on the roof to save a significant amount of energy. This paper puts forth specific reconstruction plans for old buildings in cold regions as well as some possible reconstruction paths for other structures according to the local economic development level to provide a reference for future related studies.

Suggested Citation

  • Xiaomiao Liao & Wanjiang Wang & Yihuan Zhou, 2023. "Investigating the Energy-Saving Effectiveness of Envelope Retrofits and Photovoltaic Systems: A Case Study of a Hotel in Urumqi," Sustainability, MDPI, vol. 15(13), pages 1-22, June.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:13:p:9926-:d:1176597
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    References listed on IDEAS

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    1. Yu Wang & Ling Dong & Hongxian Li, 2022. "Economic Evaluation of Energy-Saving Retrofit of Existing Hotels," Energies, MDPI, vol. 15(3), pages 1-19, January.
    2. Pierluigi De Berardinis & Marianna Rotilio & Luisa Capannolo, 2017. "Energy and Sustainable Strategies in the Renovation of Existing Buildings: An Italian Case Study," Sustainability, MDPI, vol. 9(8), pages 1-20, August.
    3. Li, Qing & Zhang, Lianying & Zhang, Limao & Wu, Xianguo, 2021. "Optimizing energy efficiency and thermal comfort in building green retrofit," Energy, Elsevier, vol. 237(C).
    4. Karimi, Mohammad Sadjad & Fazelpour, Farivar & Rosen, Marc A. & Shams, Mehrzad, 2019. "Comparative study of solar-powered underfloor heating system performance in distinctive climates," Renewable Energy, Elsevier, vol. 130(C), pages 524-535.
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    Cited by:

    1. Siti Fatihah Salleh & Ahmad Abubakar Suleiman & Hanita Daud & Mahmod Othman & Rajalingam Sokkalingam & Karl Wagner, 2023. "Tropically Adapted Passive Building: A Descriptive-Analytical Approach Using Multiple Linear Regression and Probability Models to Predict Indoor Temperature," Sustainability, MDPI, vol. 15(18), pages 1-25, September.
    2. Haitao Wang & Fanghao Wu & Ning Lu & Jianfeng Zhai, 2023. "Comprehensive Research on the Near-Zero Energy Consumption of an Office Building in Hefei Based on a Photovoltaic Curtain Wall," Sustainability, MDPI, vol. 15(15), pages 1-17, July.

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