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Optimization of Flow Channels in a PEM Fuel Cell Based on a Multiobjective Evaluation.

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Area of Science:

  • Energy Science
  • Chemical Engineering
  • Materials Science

Background:

  • Proton exchange membrane fuel cells (PEMFCs) offer clean and efficient energy conversion.
  • Limited energy density and high costs hinder widespread PEMFC adoption.
  • Optimizing PEMFC design is crucial for advancing this technology.

Purpose of the Study:

  • To enhance PEMFC performance by investigating the impact of flow channel blockages.
  • To evaluate the effectiveness of different blockage designs on key performance indicators.
  • To provide an optimized flow channel design for improved PEMFC operation.

Main Methods:

  • Simulation of five distinct PEMFC blockage configurations.
  • Application of the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) for multi-objective evaluation.
  • Analysis of mass transfer, water and thermal management, and electrochemical conversion efficiency.

Main Results:

  • Nozzle effects from blockages improved mass transfer and water/thermal management, reducing liquid water by up to 35.8%.
  • Elliptical blockages demonstrated the highest increase in electrochemical conversion efficiency (3.42%).
  • TOPSIS analysis confirmed elliptical blockages as the most beneficial design.

Conclusions:

  • Flow channel modifications, specifically elliptical blockages, significantly enhance PEMFC performance.
  • The study offers an optimized PEMFC flow channel design.
  • A novel multi-objective evaluation perspective for structural improvements in PEMFCs is presented.