Evaluation of Fuel Gas Supply System for Marine Dual-Fuel Propulsion Engines Using LNG and Ammonia Fuel

Soobin Hyeon, Jinkwang Lee and Jungho Choi ()
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Soobin Hyeon: Department of Naval Architecture and Offshore Engineering, Dong-A University, 37 Nakdong-daero 550 Beon-gil, Saha-gu, Busan 49315, Korea
Jinkwang Lee: Department of Naval Architecture and Offshore Engineering, Dong-A University, 37 Nakdong-daero 550 Beon-gil, Saha-gu, Busan 49315, Korea
Jungho Choi: Department of Naval Architecture and Offshore Engineering, Dong-A University, 37 Nakdong-daero 550 Beon-gil, Saha-gu, Busan 49315, Korea

Energies, 2022, vol. 15, issue 17, 1-16

Abstract: This study proposes a fuel supply system for dual-fuel propulsion engines using liquefied natural gas (LNG) and ammonia to control carbon emissions. The independent fuel supply system of LNG and ammonia is configured as a hybrid system. The operating pressure of the re-condenser is determined as a process variable according to the power consumption and flow rate of the non-condensable boil-off gas. The independent and hybrid systems are compared and evaluated through thermodynamic analyses, including specific power consumption (SPC) and exergy analyses, with respect to the fuel ratio and engine load. When the engine load is 100% in Case 1 for a 40% carbon reduction by 2030, the hybrid system exhibits an SPC reduction of 70% and exergy efficiency increase of 16% compared with the independent system.

Keywords: fuel gas supply system; dual-fuel engine; LNG; ammonia; exergy analysis; specific power consumption (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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