Comprehensive analysis on building performance enhancement based on selective split-band modulated adaptive thermochromic windows

Shuangdui Wu, Hongli Sun, Junkang Song, Sai Liu, Shaohang Shi, ChiYan Tso and Borong Lin

Applied Energy, 2024, vol. 372, issue C, No S0306261924011371

Abstract: Thermochromic technology has exciting potential for building applications as it passively modulates its solar transmittance. Existing smart window technologies lead to unnecessary increases in lighting energy consumption during spectral modulation and limited application scenarios. Therefore, spectrally selective modulation is a key direction to improve the performance of smart windows. In this paper, a three-story office building is established in EnergyPlus, and how the characteristic parameters and spectral modulation properties affect the effectiveness of thermochromic windows are thoroughly investigated through actual spectra and hypothetical split-band modulation spectra. A comprehensive human-centered evaluation system is proposed, multiple light zones are divided to investigate in detail the light and thermal environment and comfort performance of office spaces with different orientations of near-window areas and verify the energy-saving effect. The impact of thermochromic adaptive windows on building part loads and equipment efficiency is discussed and the matching of this passive technology with renewable photovoltaics is briefly mentioned. Based on the two-way synergistic perspective of materials and buildings, the results inform the application of smart windows in specific scenarios, throwing light on more cross-cutting research.

Keywords: Thermochromic smart windows; Spectrally selective; Split-band modulation; Building application performance; Comprehensive performance evaluation; Partial load ratio (search for similar items in EconPapers)
Date: 2024
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Citations: View citations in EconPapers (2)

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DOI: 10.1016/j.apenergy.2024.123754

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