Evaluation of the ethane reliquefaction system integrated with the fuel gas supply system of the large ethane carrier

Victoriia Sokolovska-Yefymenko, Larisa Morozyuk, Volodymyr Ierin, Olga Khliyeva, Oleksandr Feshchuk and Oleksandr Yefymenko

Energy, 2025, vol. 330, issue C

Abstract: This study presents, for the first time, a thermodynamic and environmental analysis of an ethane reliquefaction system integrated with the fuel gas supply system of the large ethane carrier. The model is based on data obtained during the vessel's sea trials, and its performance is evaluated using energy and exergy analysis methods. The system's exergy efficiency is 31.09 %, similar to typical values for marine energy systems. The fuel gas supply system is characterized by significant exergy destruction due to pressure drop in a long and complex piping system, and a substantial pressure difference (from 350 to 5 bar) required to deliver ethane to the engine. The main contribution to exergy destruction within the fuel gas supply system (FGSS) comes from the main pipelines and filters, accounting for 78.74 % of the total exergy destruction in this system. The ethane vaporizer demonstrates low exergy efficiency – 8.42 %. A significant portion of exergy destruction in the reliquefaction plant is associated with the compressors. The refrigerant economizer shows an exergy efficiency of 25.71 %, which, along with the compressors' low performance, indicates potential for parameter optimization to improve system performance. Environmental analysis showed a reduction in CO2 emissions by 25.1 % compared to marine diesel oil and 14.5 % compared to heavy fuel oil. Generally, the system demonstrates stable thermodynamic performance and meets design and operational requirements.

Keywords: Ethane; Reliquefaction system; BOG; FGSS; Exergy efficiency; Environmental performance (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544225025265
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:330:y:2025:i:c:s0360544225025265

DOI: 10.1016/j.energy.2025.136884

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().