The concept phase design of LNG tank and the fuel supply system on dual-fuel ships

ABSTRACTTo reduce pollution, LNG is increasingly used as a fuel in the maritime industry. This paper provides a methodology for the concept phase design of the LNG tank and fuel supply system on a ship. First, constraints of the ship, fuel tank and supply are determined. Next, the simultaneous design and optimisation of the fuel tank and supply system under defined constraints and realistic operating profiles is done. Tank design includes tank type, dimensions, insulation and design pressure analysis and structural strength assessment. Fuel supply system analysis is conducted using the developed dynamic model for comparing system configurations and equipment sizing. The methodology is demonstrated on two dual-fuel cruise ships of different sizes. The influence of ship operating conditions on the tank and fuel supply system and their interdependence is examined. Several candidates for the optimal tank design and fuel supply system are determined based on conflicting design objectives.KEYWORDS: Dual-fuel shipconcept phase designLNG tankfuel gas supply systemrealistic voyage profile Data availability statementRaw data were generated at the University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Derived data supporting the findings of this study are available from the corresponding author D. Z. on request.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work is supported by the project – ‘Competence Center for Advanced Mobility' funded by the European Regional Development Fund: [Grant Number KK.01.2.2.03].