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Methanol steam reforming reactor with fractal tree-shaped structures for photovoltaic–thermochemical hybrid power generation

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  • Zhao, Kai
  • Tian, Zhenyu
  • Zhang, Jinrui
  • Lu, Buchu
  • Hao, Yong

Abstract

The photovoltaic–thermochemical (PVTC) hybrid system converts thermal energy dissipated by concentrating photovoltaic cells to gain in power generation via the endothermic methanol steam reforming (MSR) reaction. Conventional MSR reactors are challenged by undesirable performances in heat transfer and methanol conversion, impacting the performances of power generation and energy storage of PVTC systems. In this work, an innovative fractal tree-shaped structure is introduced into the flow channels configuration of an MSR reactor to enhance heat transfer performance and methanol conversion. The methanol conversion of the novel reactor is experimentally assessed, which is 12.1 percentage points (relative improvement of 26.5%) higher than that of conventional reactors with serpentine flow channels design. A 3-D multiphysics model of the MSR reactors coupling heat transfer, gas flow, and chemical reaction is developed to reveal the mechanism of methanol conversion improvement. The fractal tree-shaped structure can improve the net solar-electric efficiency of the photovoltaic–thermochemical hybrid system by 5.6–7.5% (up to 36.6%). The efficient solar energy power generation of the PVTC system with energy storage ratio ensures considerable dispatchability for hybrid solar power generation.

Suggested Citation

  • Zhao, Kai & Tian, Zhenyu & Zhang, Jinrui & Lu, Buchu & Hao, Yong, 2023. "Methanol steam reforming reactor with fractal tree-shaped structures for photovoltaic–thermochemical hybrid power generation," Applied Energy, Elsevier, vol. 330(PB).
    • Handle: RePEc:eee:appene:v:330:y:2023:i:pb:s0306261922014775
    DOI: 10.1016/j.apenergy.2022.120220
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