Scholarlink

<p>Solar absorbers are critical to the advancement of renewable energy systems via solar to thermal conversion efficiency optimization. We present a triple bio-inspired hierarchical solar absorber with a simulated 98.2% AM1.5-weighted absorption. Its multiscale synergy of fractal tungsten for omnidirectional harvesting (&gt; 95% at 85° incidence) and MXene nano-arrays for high quality factor (Q) resonances (Q = 114.8 at 1068&#xa0;nm) and near-perfect NIR capture (99.79% at 1068&#xa0;nm) demonstrates a potential that outperforms that of existing absorbers. Integrated PCM microcapsules provide dynamic thermal management (60&#xa0;°C isothermal plateau, 20–30&#xa0;°C temperature reduction). Numerical simulations confirm strong field confinement and volumetric loss in high MXene-PCM interfaces. Thermal management provides material stability (simulated ΔT &lt; 0.05&#xa0;°C at 4727&#xa0;°C) under a flux of 1000 W/m<sup>2</sup>. The structure enhances thermal homogeneity by 10,000 times, setting new standards for deployable solar systems.</p>

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New bio-inspired composite solar absorber with dynamic thermal regulation via phase change materials

  • 期刊论文

  • 发表日期：

    2025年9月30日

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  • Hamza Baroud,
  • Fatima Djerfaf,
  • Djalal eddine Bensafieddine,
  • Tahar Aliouar,
  • Sarah Guenou,
  • El Tayeb Bentria

摘要

Solar absorbers are critical to the advancement of renewable energy systems via solar to thermal conversion efficiency optimization. We present a triple bio-inspired hierarchical solar absorber with a simulated 98.2% AM1.5-weighted absorption. Its multiscale synergy of fractal tungsten for omnidirectional harvesting (> 95% at 85° incidence) and MXene nano-arrays for high quality factor (Q) resonances (Q = 114.8 at 1068 nm) and near-perfect NIR capture (99.79% at 1068 nm) demonstrates a potential that outperforms that of existing absorbers. Integrated PCM microcapsules provide dynamic thermal management (60 °C isothermal plateau, 20–30 °C temperature reduction). Numerical simulations confirm strong field confinement and volumetric loss in high MXene-PCM interfaces. Thermal management provides material stability (simulated ΔT < 0.05 °C at 4727 °C) under a flux of 1000 W/m2. The structure enhances thermal homogeneity by 10,000 times, setting new standards for deployable solar systems.