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Comparative Study on Fuel Gas Supply Systems for LNG Bunkering Using Carbon Dioxide and Glycol Water

Department of Naval Architecture and Offshore Engineering, Dong-A University, Busan 49135, Korea
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J. Mar. Sci. Eng. 2019, 7(6), 184; https://doi.org/10.3390/jmse7060184
Received: 2 May 2019 / Revised: 10 June 2019 / Accepted: 10 June 2019 / Published: 13 June 2019
(This article belongs to the Special Issue Modelling and Optimisation of Ship Energy Systems)
Liquified natural gas (LNG) fuel has received significant attention as an affordable and highly efficient fuel option due to strengthened regulations on the sulfur content of bunker oil put in place by the International Maritime Organization. The main component of the LNG fuel gas supply system (FGSS) is the heat exchanger that provides adequate gas temperatures and pressures required by the engine, which also has a large machinery volume compared with other equipment. Due to the volume limitation, most FGSS have been applied to new shipbuilding only. To reduce the volume of the FGSS, CO2 was considered to serve as the replacement heat medium for conventionally used glycol water during LNG gasification. The specific power consumption (SPC) in the CO2 and glycol water system was optimized using the Aspen HYSYS thermodynamic modeler toward adjusting the temperature and pressure, and the resulting sizes were compared. This study demonstrated that the CO2 heat medium resulted in a 14% improvement in efficiency and a 7% reduction in heat exchanger size concluding that it was the most advantageous heat medium for the LNG regasification. View Full-Text
Keywords: fuel gas supply system; heat exchanger; CO2; LNG bunkering fuel gas supply system; heat exchanger; CO2; LNG bunkering
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Choi, J.; Park, E.-Y. Comparative Study on Fuel Gas Supply Systems for LNG Bunkering Using Carbon Dioxide and Glycol Water. J. Mar. Sci. Eng. 2019, 7, 184.

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