Comparative analysis of a hybrid propulsion using LNG-LH2 complying with regulations on emissions

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This study proposed a liquefied natural gas (LNG)-liquid hydrogen (LH2) hybrid propulsion system for a 267,000 m(3) LNG carrier to be compliant with the energy efficiency design index (EEDI) requirement for CO2 emissions from ships in the near future and evaluated the system with regard to the aspects of the EEDI, hybrid fuel ratio, installation area, safety, and economics. The system design parameters were adjusted to satisfy the EEDI of Phases 4 and 5, which were less than the current EEDI requirement by 14% and 28%, respectively. The propulsion power of 6 MW should be generated in Phase 4 from hydrogen that accounted for 3% of the total mass of LH2 and LNG fuel. The CO2-free power generation in Phase 5 was increased to 13 MW, corresponding to 6% of the total fuel mass. The LH2 price was $2.0/kg and $2.4/kg for Phases 4 and 5, respectively, to gain an economic competitiveness against the conventional LNG-based propulsion system. (C) 2018 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2018-02
Language
English
Article Type
Article
Keywords

FUEL-CELL APPLICATIONS; SYSTEMS; SHIPS; HYDROGEN; AVAILABILITY; PERFORMANCE; INTEGRATION; MEMBRANES; VEHICLE

Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.43, no.7, pp.3809 - 3821

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2018.01.041
URI
http://hdl.handle.net/10203/240956
Appears in Collection
ME-Journal Papers(저널논문)
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