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Modeling and analysis of the coupling effects induced by temperature and duty cycle in integrated PEMFC-DC/DC converter systems

Author

Listed:
  • Wang, Jingyu
  • Shen, Yuqi
  • Wang, Lei
  • Wang, Yuqi
  • Liang, Xueqi

Abstract

For optimal system-level energy conversion, the output characteristics of proton exchange membrane fuel cells (PEMFCs) require conditioning via direct current to direct current (DC/DC) converters. The present paper establishes a mathematical model for the integrated system of PEMFC and a BOOST converter by using Matlab/Simulink. The coupling effects induced by the fuel cell temperature and the converter duty cycle in the integrated system are analyzed under different load conditions. The results show that the characteristics of PEMFC and the BOOST converter are well-matched. Temperature variations directly affect the fuel cell efficiency, which in turn impacts the overall system efficiency. Increasing the temperature within a reasonable range can enhance the system efficiency. Additionally, reducing the duty cycle not only improves the efficiency of the BOOST converter but also increases the fuel cell efficiency by lowering the output current (IFC), thus further enhancing the system efficiency. The enhancement factor, which is defined as the ratio of the system efficiency with and without coupling effects, ranges from 1.061 to 1.220. The research findings provide a theoretical basis for optimizing the design of the PEMFC-DC/DC converter integrated system.

Suggested Citation

  • Wang, Jingyu & Shen, Yuqi & Wang, Lei & Wang, Yuqi & Liang, Xueqi, 2026. "Modeling and analysis of the coupling effects induced by temperature and duty cycle in integrated PEMFC-DC/DC converter systems," Renewable Energy, Elsevier, vol. 266(C).
    • Handle: RePEc:eee:renene:v:266:y:2026:i:c:s0960148126005276
    DOI: 10.1016/j.renene.2026.125702
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