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Thermal Characteristics Simulation of an Energy-Conserving Facade: Water Flow Window

Author

Listed:
  • Yuanli Lyu

    (Department of Civil, Architecture and Environment, Xihua University, Chengdu 610097, China
    Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu 610097, China)

  • Sihui Chen

    (Department of Civil, Architecture and Environment, Xihua University, Chengdu 610097, China)

  • Can Liu

    (Department of Civil, Architecture and Environment, Xihua University, Chengdu 610097, China)

  • Jun Li

    (Department of Civil, Architecture and Environment, Xihua University, Chengdu 610097, China)

  • Chunying Li

    (BenYuan Design and Research Center, School of Architecture and Urban Planning, Shenzhen University, Shenzhen 518060, China)

  • Hua Su

    (Department of Civil, Architecture and Environment, Xihua University, Chengdu 610097, China)

Abstract

In this paper, a 3D numerical simulation was completed to explore the thermal characteristics in a water flow window in-depth. CFD was used to carry out the analysis on top of successful validation. By changing the solar intensity, water supply temperature and velocity, the temperature distribution and flow field in the window cavity, as well as the water heat gain, were analyzed and compared. This is meaningful for improving the energy-conserving performance in building applications. Simulation results reveal that the variation of solar intensity and water supply temperature affects directly the temperature distribution and the water heat gain but has little impact on the overall velocity field. Local vortices are generated in the window cavity, and their formation and location are largely affected by the varied temperature rise in the water layer. The water heat gain increases and then decreases with the increase in water supply velocity. In addition, a large-enough water supply velocity can disorder the uniform upward flow. These are detrimental to effective thermal extraction. Therefore, in practical application, the vortex should be eliminated, and the flow velocity should be determined properly to maximize the water heat gain.

Suggested Citation

  • Yuanli Lyu & Sihui Chen & Can Liu & Jun Li & Chunying Li & Hua Su, 2022. "Thermal Characteristics Simulation of an Energy-Conserving Facade: Water Flow Window," Sustainability, MDPI, vol. 14(5), pages 1-22, February.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:5:p:2737-:d:759067
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    References listed on IDEAS

    as
    1. Lyu, Yuan-Li & Chow, Tin-Tai & Wang, Jin-Liang, 2018. "Numerical prediction of thermal performance of liquid-flow window in different climates with anti-freeze," Energy, Elsevier, vol. 157(C), pages 412-423.
    2. Cuce, Erdem & Riffat, Saffa B., 2015. "A state-of-the-art review on innovative glazing technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 41(C), pages 695-714.
    3. Lyu, Yuanli & Liu, Wenjie & Chow, Tin-tai & Su, Hua & Qi, Xuejun, 2019. "Pipe-work optimization of water flow window," Renewable Energy, Elsevier, vol. 139(C), pages 136-146.
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    Cited by:

    1. 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.
    2. Chen, Sihui & Lyu, Yuanli & Li, Chunying & Li, Xueyang & Yang, Wei & Wang, Ting, 2024. "Liquid flow glazing contributes to energy-efficient buildings: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 191(C).

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