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A novel hybrid liquefied natural gas process with absorption refrigeration integrated with molten carbonate fuel cell

Author

Listed:
  • Mehdi Mehrpooya
  • Parimah Bahramian
  • Fathollah Pourfayaz
  • Hadi Katooli
  • Mostafa Delpisheh

Abstract

The production of liquefied natural gas (LNG) is a high energy-consuming process. The study of ways to reduce energy consumption and consequently to reduce operational costs is imperative. Toward this purpose, this study proposes a hybrid system adopting a mixed refrigerant for the liquefaction of natural gas that is precooled with an ammonia/water absorption refrigeration (AR) cycle utilizing the exhaust heat of a molten carbonate fuel cell, 700°C and 2.74 bar, coupled with a gas turbine and a bottoming Brayton super-critical carbon dioxide cycle. The inauguration of the ammonia/water AR cycle to the LNG process increases the cooling load of the cycle by 10%, providing a 28.3-MW cooling load duty while having a 0.45 coefficient of performance. Employing the hybrid system reduces energy consumption, attaining 85% overall thermal efficiency, 53% electrical efficiency and 35% fuel cell efficiency. The hybrid system produces 6300 kg.mol.h−1 of LNG and 146.55 MW of electrical power. Thereafter, exergy and sensitivity analyses are implemented and, accordingly, the fuel cell had an 83% share of the exergy destruction and the whole system obtained a 95% exergy efficiency.

Suggested Citation

  • Mehdi Mehrpooya & Parimah Bahramian & Fathollah Pourfayaz & Hadi Katooli & Mostafa Delpisheh, 2021. "A novel hybrid liquefied natural gas process with absorption refrigeration integrated with molten carbonate fuel cell," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 16(3), pages 956-976.
    • Handle: RePEc:oup:ijlctc:v:16:y:2021:i:3:p:956-976.
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctab021
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    Citations

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    Cited by:

    1. Hekmatshoar, Maziyar & Deymi-Dashtebayaz, Mahdi & Gholizadeh, Mohammad & Dadpour, Daryoush & Delpisheh, Mostafa, 2022. "Thermoeconomic analysis and optimization of a geothermal-driven multi-generation system producing power, freshwater, and hydrogen," Energy, Elsevier, vol. 247(C).
    2. Jinxi, Wang & Xue, Bai & Ying, Liang & Aimin, Wang & Cuiying, Lu & Yajun, Ma & Chengmeng, Chen & Heydarian, Dariush, 2023. "Simulation and technical, economic, and environmental analyses of natural gas liquefaction cycle using different configurations," Energy, Elsevier, vol. 278(C).
    3. Mousavi, Seyed Ali & Toopshekan, Ashkan & Mehrpooya, Mehdi & Delpisheh, Mostafa, 2023. "Comprehensive exergetic performance assessment and techno-financial optimization of off-grid hybrid renewable configurations with various dispatch strategies and solar tracking systems," Renewable Energy, Elsevier, vol. 210(C), pages 40-63.

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