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http://dx.doi.org/10.26748/KSOE.2018.6.32.5.372

Optimal Process Design of Onboard BOG Re-liquefaction System for LNG Carrier  

Hwang, Chulmin (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Lim, Youngsub (Research Institute of Marine Systems Engineering, Seoul National University)
Publication Information
Journal of Ocean Engineering and Technology / v.32, no.5, 2018 , pp. 372-379 More about this Journal
Abstract
High-pressure gas injection engines (HPGI) took center stage in LNG carrier propulsion systems after their advent. The HPGI engine system can be easily modified to include a re-liquefaction system by adding several devices, which can significantly increase the economic feasibility of the total system. This paper suggests the optimal operating conditions and capacity for a re-liquefaction system for an LNG carrier, which can minimize increases in the total annualized cost. The installation of a re-liquefaction system can save 0.23 million USD per year when the cost of LNG is 5 USD/Mscf. A sensitivity analysis with different LNG costs showed that the re-liquefaction system is profitable when the LNG cost is higher than 3.5 USD/Mscf.
Keywords
LNG carrier; Boil-off gas(BOG); Re-liquefaction system; Process design; Process optimization; Optimal design;
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Times Cited By KSCI : 1  (Citation Analysis)
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