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Study on the floating pressurized liquefied CH4-H2 Unit applied in offshore renewable P2G storage and transportation system

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  • Sun, Chongzheng
  • Liu, Yuxiang
  • Wang, Yiran
  • Li, Yuxing
  • Wang, Kun
  • Yang, Xin

Abstract

With the development of green energy, the technology of producing methane by reacting hydrogen with carbon dioxide is beneficial for the consumption of renewable energy and greenhouse gas emissions. The P2G (Power to Gas) storage and transportation system can use renewable energy sources to produce hydrogen through electricity. The FPLM-H2 (Floating pressurized liquefied methane from hydrogen) storage and transportation unit is proposed to improve the economics and flexibility of P2G system. A new floating pressurized liquefaction digital twin model was constructed to study the performance of FPLM-H2 unit. The experimental device of cryogenic liquefaction process has been built to validate the numerical model. The results of the adaptability of CO2 components to FPLM-H2 plant under offshore conditions indicate that the digital twin model of FPLM-H2 unit has high simulation accuracy. Under offshore conditions of 6° and 9°, the heat transfer performance of the heat exchanger will deteriorate, thereby reducing the overall liquefaction process performance of FPLM-H2 unit. A small amount of carbon dioxide has little effect on the overall liquefaction efficiency.

Suggested Citation

  • Sun, Chongzheng & Liu, Yuxiang & Wang, Yiran & Li, Yuxing & Wang, Kun & Yang, Xin, 2026. "Study on the floating pressurized liquefied CH4-H2 Unit applied in offshore renewable P2G storage and transportation system," Renewable Energy, Elsevier, vol. 256(PB).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pb:s0960148125016581
    DOI: 10.1016/j.renene.2025.123994
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