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An adjustable molar fraction of oxygen structure for cathode gas supply system and its economic analysis based on lifecycle electricity generation cost

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  • Chen, Fengxiang
  • Tong, Guangyao
  • Chi, Xuncheng
  • Zhang, Bo

Abstract

As water electrolysis hydrogen production technology advances rapidly and its applications expand, the oxygen produced as a byproduct is generally not utilized. To utilize the oxygen and enhance system performance, this paper proposes an adjustable molar fraction oxygen enrichment system. Compared to air supply systems, the proposed system can reduce air compressor power consumption up to 60 % and increase the net power up to 43 %. Considering that increasing the molar fraction of oxygen (MFO) will also negatively impact the lifespan of fuel cell, this paper through introduces Lifecycle Electricity Generation Cost (LEGC) as an evaluation method to investigate the effects of MFO on both performance and lifespan in detail. The research results indicate appropriate range for MFO is 30 %–50 %, and the LEGC can be reduced by a maximum of 22.9 %. These findings underscore the critical importance of optimizing MFO for enhancing fuel cell efficiency and economic benefits, thereby offering valuable insights and guidance for future technological advancements in this field.

Suggested Citation

  • Chen, Fengxiang & Tong, Guangyao & Chi, Xuncheng & Zhang, Bo, 2026. "An adjustable molar fraction of oxygen structure for cathode gas supply system and its economic analysis based on lifecycle electricity generation cost," Renewable Energy, Elsevier, vol. 256(PE).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pe:s0960148125018853
    DOI: 10.1016/j.renene.2025.124221
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    References listed on IDEAS

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