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<p>Thermophotovoltaic (TPV) systems have attracted considerable interest because of their ability to efficiently convert thermal radiation into electrical energy, with significant implications for waste heat recovery, portable energy generation, and renewable energy applications. Enhancing the performance of TPV systems necessitates the development of selective and efficient thermal emitters that align with the spectral responses of photovoltaic cells. This study explores novel tungsten-aluminum nitride (W-AlN) selective thermal emitters, which are characterized by high hemispherical emittance within the targeted spectral range. Using numerical simulations, we propose two distinct architectural configurations: a planar multifaceted stack and a grating structure. Both designs undergo optimization through a genetic algorithm, incorporating a carefully designed fitness function, alongside detailed simulations utilizing the finite element method (FEM) to assess the thermal emittance accurately. These findings indicate that the proposed emitters achieve exceptionally high hemispherical thermal emittance, closely matching the optical response of InGaSb photovoltaic cells while exhibiting minimal directional dependence. Additionally, a thorough analysis of the TPV cell output power and conversion efficiency as functions of the emitter temperature revealed substantial performance improvements facilitated by these advanced structures. The innovation in this research lies in the unique emitter designs and optimization strategies, which collectively enhance the efficiency and scalability of TPV systems. These results highlight the significant potential of W-AlN-based emitters in advancing energy conversion technologies.</p>

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Investigating planar and grating designs of tungsten–aluminum nitride emitters for optimal performance in thermophotovoltaic systems

  • 期刊论文

  • 发表日期：

    2025年6月14日

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  • Gemechis Mathewos Fite,
  • Fekadu Tolessa Maremi,
  • Abebe Belay Gemta,
  • Gashaw Beyene,
  • Tesfaye Feyisa Hurisa,
  • Tadese Bekele Aredo

摘要

Thermophotovoltaic (TPV) systems have attracted considerable interest because of their ability to efficiently convert thermal radiation into electrical energy, with significant implications for waste heat recovery, portable energy generation, and renewable energy applications. Enhancing the performance of TPV systems necessitates the development of selective and efficient thermal emitters that align with the spectral responses of photovoltaic cells. This study explores novel tungsten-aluminum nitride (W-AlN) selective thermal emitters, which are characterized by high hemispherical emittance within the targeted spectral range. Using numerical simulations, we propose two distinct architectural configurations: a planar multifaceted stack and a grating structure. Both designs undergo optimization through a genetic algorithm, incorporating a carefully designed fitness function, alongside detailed simulations utilizing the finite element method (FEM) to assess the thermal emittance accurately. These findings indicate that the proposed emitters achieve exceptionally high hemispherical thermal emittance, closely matching the optical response of InGaSb photovoltaic cells while exhibiting minimal directional dependence. Additionally, a thorough analysis of the TPV cell output power and conversion efficiency as functions of the emitter temperature revealed substantial performance improvements facilitated by these advanced structures. The innovation in this research lies in the unique emitter designs and optimization strategies, which collectively enhance the efficiency and scalability of TPV systems. These results highlight the significant potential of W-AlN-based emitters in advancing energy conversion technologies.