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Serial electrochemical hydrogen compressor stack for high-pressure compression

Author

Listed:
  • Chu, Chanho
  • Kim, Minsoo
  • Kim, Youngki
  • Park, Sihyung
  • Beom, Taeyoung
  • Kim, Sangwon
  • Kim, Dong Kyu

Abstract

In this study, a serial electrochemical hydrogen compressor (EHC) stack was designed to compress hydrogen gas to hundreds of bars. The operating parameters were examined to analyze optimal performance. First, a serial stack was designed to enable the EHC to operate at pressures exceeding hundreds of bars. The circular design of the stack was chosen specifically to prevent hydrogen leakage. A 127-μm-thick membrane was selected owing to its relatively good pressure resistance and performance. Through a serial EHC stack of 3 cells, hydrogen was pressurized over 120 bar. A parametric study showed that the pressure-ratio across the membrane barely affected the performance. Additionally, the higher the temperature and relative humidity, the better the performance. By increasing the temperature to 70 °C, the power consumption was reduced by 40 %. At 100 % relative humidity, the EHC exhibited the lowest power consumption. Finally, the performance of the serial stack was analyzed under optimal operating conditions, wherein it demonstrated an efficiency over 64 % for below 0.03 kg/day mass-flow rate of compressed hydrogen. However, efficiency decreased to 12 % at a mass-flow rate over 0.17 kg/day.

Suggested Citation

  • Chu, Chanho & Kim, Minsoo & Kim, Youngki & Park, Sihyung & Beom, Taeyoung & Kim, Sangwon & Kim, Dong Kyu, 2025. "Serial electrochemical hydrogen compressor stack for high-pressure compression," Applied Energy, Elsevier, vol. 383(C).
    • Handle: RePEc:eee:appene:v:383:y:2025:i:c:s0306261925001278
    DOI: 10.1016/j.apenergy.2025.125397
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