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Efficient utilization of enriched oxygen gas in residential PEMFC-CHP system with hydrogen energy storage

Author

Listed:
  • Ye, Huan
  • Chen, Fengxiang
  • Huo, Haibo
  • Pei, Yaowang
  • Jiao, Jieran
  • Pei, Fenglai
  • Zhang, Weidong

Abstract

The oxygen byproduct generated from water electrolysis can be utilized on-site in residential combined heat and power (CHP) systems to enhance economic efficiency. This study explores solutions for optimizing the use of enriched oxygen gas (EOG) and determining the ideal oxygen fraction to maximize economic viability. A novel EOG supply system is designed to regulate oxygen fraction, oxygen excess ratio (OER), and humidity. A dynamic model of a PEMFC integrated with the EOG supply system is developed using MATLAB/Simulink® software and partially validated. The dual effects of EOG on system efficiency and remaining useful lifetime (RUL) are analyzed using a comprehensive economic optimization algorithm, leading to the identification of optimal oxygen fractions for various hydrogen production modes. Additionally, a feedforward static decoupling controller is designed to independently control the OER and oxygen fraction. The results indicate that, under rated conditions (10 kW), system power increased by 15 %, along with a 10 % improvement in system efficiency, from 48 % to 58 %. In conclusion, the efficient use of enriched oxygen gas demonstrates significant economic feasibility and practical viability, making it highly suitable for distributed power generation applications.

Suggested Citation

  • Ye, Huan & Chen, Fengxiang & Huo, Haibo & Pei, Yaowang & Jiao, Jieran & Pei, Fenglai & Zhang, Weidong, 2024. "Efficient utilization of enriched oxygen gas in residential PEMFC-CHP system with hydrogen energy storage," Energy, Elsevier, vol. 311(C).
    • Handle: RePEc:eee:energy:v:311:y:2024:i:c:s0360544224031153
    DOI: 10.1016/j.energy.2024.133339
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