Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Exergy Analysis and Heat Exchanger Network Synthesis for Improvement of a Hydrogen Production Process: Practical Application to On-Site Hydrogen Refueling Stations

수소 생산 공정 개선을 위한 엑서지 분석과 열 교환망 합성: 분산형 수소 충전소에 대한 실용적 적용

  • YUN, SEUNGGWAN (Department of Chemical Engineering, Konkuk University) ;
  • CHO, HYUNGTAE (Green Materials and Processes R&D Group, Korea Institute of International Technology) ;
  • KIM, MYUNGJUN (Office of Research Affairs/University Industry Foundation, Yonsei University) ;
  • LEE, JAEWON (Green Materials and Processes R&D Group, Korea Institute of International Technology) ;
  • KIM, JUNGHWAN (Green Materials and Processes R&D Group, Korea Institute of International Technology)
  • 윤승관 (건국대학교 화학공학과) ;
  • 조형태 (한국생산기술연구원 친환경재료공정연구그룹) ;
  • 김명준 (연세대학교 산학협력단) ;
  • 이재원 (한국생산기술연구원 친환경재료공정연구그룹) ;
  • 김정환 (한국생산기술연구원 친환경재료공정연구그룹)
  • Received : 2022.09.12
  • Accepted : 2022.10.18
  • Published : 2022.10.30
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Abstract

In this study, the on-site hydrogen production process for refueling stations that were not energy-optimized was improved through exergy analysis and heat exchange network synthesis. Furthermore, the process was scaled up from 30 Nm3/h to 150 Nm3/h to improve hydrogen production capacity. Exergy analysis results show that exergy destruction in the SMR reactor and the heat exchanger accounts for 58.1 and 19.8%, respectively. Thus, the process is improved by modifying the heat exchange network to reduce the exergy loss in these units. As a result of the process simulation analysis, thermal and exergy efficiency is improved from 75.7 to 78.6% and 68.1 to 70.4%, respectively. In conclusion, it is expected to improve the process efficiency when installing on-site hydrogen refueling stations.

Keywords

Acknowledgement

이 연구는 대한민국 정부 산업통상자원부 및 방위사업청 재원으로 민군협력진흥원에서 수행하는 민군기술협력사업의 연구비(UM19313RD3) 지원으로 수행되었다.

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