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Journal of Automotive Safety and Energy ›› 2025, Vol. 16 ›› Issue (6): 905-913.DOI: 10.3969/j.issn.1674-8484.2025.06.010

• Automotive Energy Efficiency and Environment Protection • Previous Articles     Next Articles

Optimization of heat dissipation in proton exchange membrane fuel cells and coupling of waste heat-hydrogen storage system

LANG Dongyu1(), BAO Gang1, ZHANG Shu2, YU Zhenyu2, SUN Jiahong2, XIE Huaqing2,*()   

  1. 1. Shenyang Institute of Special Equipment Inspection and Research, Shenyang, 110035, China
    2. Northeastern University, School of Metallurgy, Shenyang 110819, China
  • Received:2025-08-04 Revised:2025-11-10 Online:2025-12-31 Published:2026-01-12

Abstract:

In order to reduce the impact of waste heat on performance in the operation of proton exchange membrane fuel cells (PEMFCs) and to improve energy utilization efficiency during the operation of the PEMFC, the numerical optimizations of PEMFC’s output characteristics and cooling conditions were carried out based on the traditional single direct current cooling channel, with a thermal coupling model being established between PEMFC and metal hydride hydrogen storage reactor. The results show that PEMFC achieves an output of 561.2 W under the operating conditions of 333 K and 1.41 A/cm2; the optimal cooling conditions, where the heat generated by the fuel cell can fully drive hydrogen release from the hydrogen storage reactor, are an inlet water temperature of 330 K and a flow rate of 15 cm/s. The system operates stably, the temperature of the hydrogen storage tank is maintained at 314 K, and the total power supply reaches 0.78 kWh during the period from 334 s to 3 615 s. Therefore, optimizing the operating parameters of PEMFC enables efficient thermal coupling between the power generation and hydrogen storage systems.

Key words: proton exchange membrane fuel cells (PEMFCs), metal hydride hydrogen storage reactors, output characteristics, coupling systems, waste heat utilization

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