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  • 1National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China.

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Summary
This summary is machine-generated.

This study introduces a three-state thermochromic smart window (TSSW) for improved building energy efficiency. The novel smart window effectively regulates solar spectrum transmission, significantly reducing heating, ventilation, and air conditioning energy demands.

Keywords:
energy‐savingsmart windowthermochromicthree‐state

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Area of Science:

  • Materials Science
  • Building Physics
  • Energy Efficiency

Background:

  • Smart windows are crucial for reducing building energy consumption by regulating solar transmission.
  • Existing smart windows have limitations in modulation amplitude and wavelength control, impacting performance.
  • Dynamic solar spectrum control is essential for effective thermal management in buildings.

Purpose of the Study:

  • To develop a three-state thermochromic smart window (TSSW) with enhanced solar modulation and thermal management capabilities.
  • To overcome the limitations of existing smart windows in terms of regulation amplitude and wavelength control.
  • To improve energy efficiency in buildings through advanced smart window technology.

Main Methods:

  • Utilized tungsten-doped vanadium dioxide (W-VO₂) and perovskite films for their unique phase transition properties.
  • Engineered a TSSW capable of stepwise control over visible light and near-infrared (NIR) transmittance.
  • Investigated adaptive transitions between cold, warm, and hot states for dynamic solar modulation.

Main Results:

  • Achieved a solar modulation rate of 23.5% with the TSSW.
  • Demonstrated significant reduction in indoor solar irradiance across the three states (cold, warm, hot).
  • Simulations indicated potential annual energy demand reduction of up to 102.09 WJ/m².

Conclusions:

  • The developed TSSW offers superior energy-saving potential compared to Low-E and ordinary glass.
  • This technology presents an ideal solution for reducing building energy consumption through dynamic solar spectrum regulation.
  • The TSSW's ability to control visible and NIR light independently enhances its thermal management capabilities.