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Performance analyses of building energy on phase transition processes of VO2 windows with an improved model

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  • Yang, Jian
  • Xu, Zhengtao
  • Ye, Hong
  • Xu, Xiaojie
  • Wu, Xi
  • Wang, Jianxiang

Abstract

A new model is established to obtain the building energy with a gradual change process of VO2 optical properties. Based on this method, three types of existing VO2 films are employed to simulate the heating and cooling energy consumptions in five typical Chinese cities. The results show that the smart characteristic is not evident in VO2 glasses because these films are almost in the cold state or cold transition state in the entire year. To improve this situation, the concept of an ideal thermochromic intelligent glass is put forward. Unexpectedly, the level of energy consumption increases with the film phase transition temperature decreasing in the heating period. However, the energy-saving effects will be effectivelyimproved both in the cooling and heating periods when the phase transition process interval is shortened. The cooling energy consumptions for the ideal glass decrease by at most 81.7% and 70.5% compared with white glass and Low-E glass, respectively. In the heating period, the level of energy consumption for the ideal glass is better than Low-E glass.

Suggested Citation

  • Yang, Jian & Xu, Zhengtao & Ye, Hong & Xu, Xiaojie & Wu, Xi & Wang, Jianxiang, 2015. "Performance analyses of building energy on phase transition processes of VO2 windows with an improved model," Applied Energy, Elsevier, vol. 159(C), pages 502-508.
    • Handle: RePEc:eee:appene:v:159:y:2015:i:c:p:502-508
    DOI: 10.1016/j.apenergy.2015.08.130
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    References listed on IDEAS

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    1. Zhou, D. & Zhao, C.Y. & Tian, Y., 2012. "Review on thermal energy storage with phase change materials (PCMs) in building applications," Applied Energy, Elsevier, vol. 92(C), pages 593-605.
    2. Kamalisarvestani, M. & Saidur, R. & Mekhilef, S. & Javadi, F.S., 2013. "Performance, materials and coating technologies of thermochromic thin films on smart windows," Renewable and Sustainable Energy Reviews, Elsevier, vol. 26(C), pages 353-364.
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    Cited by:

    1. Vincenzo Muteri & Francesco Guarino & Sonia Longo & Letizia Bua & Maurizio Cellura & Daniele Testa & Marco Bonzi, 2022. "An Innovative Photovoltaic Luminescent Solar Concentrator Window: Energy and Environmental Aspects," Sustainability, MDPI, vol. 14(7), pages 1-31, April.
    2. Shu, Lei & Mo, Yunjeong & Zhao, Dong, 2024. "Energy retrofits for smart and connected communities: Scopes and technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 199(C).
    3. Zhang, Y. & Tso, C.Y. & Iñigo, J.S. & Liu, S. & Miyazaki, H. & Chao, Christopher Y.H. & Yu, K.M., 2019. "Perovskite thermochromic smart window: Advanced optical properties and low transition temperature," Applied Energy, Elsevier, vol. 254(C).

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    Keywords

    VO2 glass; Phase transition; Building energy;
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