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The energy saving index and the performance evaluation of thermochromic windows in passive buildings

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  • Ye, Hong
  • Long, Linshuang
  • Zhang, Haitao
  • Gao, Yanfeng

Abstract

The concepts of the energy saving equivalent (ESE) and energy saving index (ESI) are presented in this paper to evaluate the performance of new materials and components in passive buildings. The ESE represents the hypothetical energy that should be input to maintain a passive room at the same thermal state as that when a particular material or component is adopted. The ESI is the ratio of a particular material or component's energy saving equivalent to the corresponding value of the ideal material or component that can maintain the room at an ideal thermal state in passive mode. The former can be used to estimate the effect of the adoption of a certain building component or material on the building's thermal state from an energy standpoint, while the latter can be used to characterize the performance of the actual building component or material from a common standpoint and be used to evaluate the performance of components or materials in different climatic regions or under different operating situations. In this study, the ESI was used to evaluate the performance of a thermochromic window, represented by a single vanadium dioxide (VO2) glazing, in passive residential buildings in three climatic regions of China (cold zone, hot summer and cold winter zone, and hot summer and warm winter zone).

Suggested Citation

  • Ye, Hong & Long, Linshuang & Zhang, Haitao & Gao, Yanfeng, 2014. "The energy saving index and the performance evaluation of thermochromic windows in passive buildings," Renewable Energy, Elsevier, vol. 66(C), pages 215-221.
    • Handle: RePEc:eee:renene:v:66:y:2014:i:c:p:215-221
    DOI: 10.1016/j.renene.2013.12.008
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    References listed on IDEAS

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    1. Ye, Hong & Meng, Xianchun & Long, Linshuang & Xu, Bin, 2013. "The route to a perfect window," Renewable Energy, Elsevier, vol. 55(C), pages 448-455.
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    Cited by:

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    2. Xiaodong Wang & Yinan Yang & Xiaoyu Li & Chunying Li, 2022. "Modeling, Simulation, and Performance Analysis of a Liquid-Infill Tunable Window," Sustainability, MDPI, vol. 14(23), pages 1-22, November.
    3. Chwieduk, Dorota A., 2017. "Towards modern options of energy conservation in buildings," Renewable Energy, Elsevier, vol. 101(C), pages 1194-1202.
    4. Al Touma, Albert & Ghali, Kamel & Ghaddar, Nesreen & Ismail, Nagham, 2016. "Solar chimney integrated with passive evaporative cooler applied on glazing surfaces," Energy, Elsevier, vol. 115(P1), pages 169-179.
    5. Chen, Xi & Yang, Hongxing & Lu, Lin, 2015. "A comprehensive review on passive design approaches in green building rating tools," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 1425-1436.
    6. Bai, Yijie & He, Yurong, 2022. "Enhanced solar modulation ability of smart windows based on hydroxypropyl cellulose mixed with nonionic surfactants," Renewable Energy, Elsevier, vol. 198(C), pages 749-759.
    7. Xie, Xing & Xu, Bin & Fei, Yue & Chen, Xing-ni & Pei, Gang & Ji, Jie, 2024. "Passive energy-saving design strategy and realization on high window-wall ratio buildings in subtropical regions," Renewable Energy, Elsevier, vol. 229(C).
    8. Yusung Lee & Woohyun Kim, 2021. "Development of an Optimal Start Control Strategy for a Variable Refrigerant Flow (VRF) System," Energies, MDPI, vol. 14(2), pages 1-17, January.
    9. Long, Linshuang & Ye, Hong & Gao, Yanfeng & Zou, Ruqiang, 2014. "Performance demonstration and evaluation of the synergetic application of vanadium dioxide glazing and phase change material in passive buildings," Applied Energy, Elsevier, vol. 136(C), pages 89-97.
    10. Li, Chunying & Tang, Haida, 2020. "Evaluation on year-round performance of double-circulation water-flow window," Renewable Energy, Elsevier, vol. 150(C), pages 176-190.
    11. Zeng, Zhaoyun & Augenbroe, Godfried & Chen, Jianli, 2022. "Realization of bi-level optimization of adaptive building envelope with a finite-difference model featuring short execution time and versatility," Energy, Elsevier, vol. 243(C).
    12. Shen, Yi & Xue, Peng & Luo, Tao & Zhang, Yanyun & Tso, Chi Yan & Zhang, Nan & Sun, Yuying & Xie, Jingchao & Liu, Jiaping, 2022. "Regional applicability of thermochromic windows based on dynamic radiation spectrum," Renewable Energy, Elsevier, vol. 196(C), pages 15-27.
    13. Al Touma, Albert & Ouahrani, Djamel, 2019. "Evaporatively-cooled façade integrated with photovoltaic thermal panel applied in hot and humid climates," Energy, Elsevier, vol. 172(C), pages 409-422.
    14. Guo, Wenwen & Kong, Li & Chow, Tintai & Li, Chunying & Zhu, Qunzhi & Qiu, Zhongzhu & Li, Lin & Wang, Yalin & Riffat, Saffa B., 2020. "Energy performance of photovoltaic (PV) windows under typical climates of China in terms of transmittance and orientation," Energy, Elsevier, vol. 213(C).

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