Design Optimization of Battery-Electric Marine Vessels via Geometric Programming

dc.contributorAalto Universityen
dc.contributor.authorRitari, Antti
dc.contributor.authorMouratidis, Panagiotis
dc.contributor.authorTammi, Kari
dc.contributor.departmentDepartment of Mechanical Engineeringen
dc.description.abstractThis paper proposes formulating conceptual-stage vessel design optimization problems as geometric programs, which can be transformed into convex optimization problems. Convex optimization offers significant advantages in efficiency, reliability and automation potential over the general nonlinear optimization approach typically used in naval architecture. Focusing on battery-electric vessels, geometric program compatible models are derived for lithium-ion cells, power converters, propulsion motors and propellers. Preliminary hull form development, stability calculation and structural design are also presented in the context of geometric programming. The modeling approach is applied to study optimal battery sizing for a coastal bulk carrier sailing in varying operational conditions. Using open-source software tools, the battery sizing problem is solved in less than a second on a standard desktop computer. Local sensitivity information encoded by optimal dual variables reveals that increasing the cell discharge upper bound by 1% decreases the optimal total number of cells by more than 1%. On the other hand, the sensitivities of cell volume and maximum discharging current parameters are zero, indicating that the constraints involving these parameters do not govern the solution.en
dc.description.versionPeer revieweden
dc.format.extent76563 - 76580
dc.identifier.citationRitari , A , Mouratidis , P & Tammi , K 2023 , ' Design Optimization of Battery-Electric Marine Vessels via Geometric Programming ' , IEEE Access , vol. 11 , pp. 76563 - 76580 .
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dc.relation.ispartofseriesIEEE Accessen
dc.relation.ispartofseriesVolume 11en
dc.subject.keywordelectric propulsion
dc.subject.keywordbattery energy storage
dc.subject.keyworddesign optimization
dc.subject.keywordship design
dc.subject.keywordconvex optimization
dc.subject.keywordgeometric programming
dc.titleDesign Optimization of Battery-Electric Marine Vessels via Geometric Programmingen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi