Design of Cost-Effective and Emission-Aware Power Plant System for Integrated Electric Propulsion Ships

Abstract

Extensive electrification of ship power systems appears to be a promising measure to meet stringent environmental requirements. The concept is to enable ship power management to allocate loads in response to load variations in an optimal manner. From a broader design perspective, the reliability of machinery operation is also of importance, especially with regard to the failure cost from power outages. In this paper, an approach for determining optimal power plants based on economic and environmental perspectives across several architecture choices is proposed. The design procedure involves the implementation of metaheuristic optimization to minimize fuel consumption and emissions released, while maintenance and repair services can be extracted using reliability assessment tools. The simulation results demonstrated that ship power management using the whale optimization algorithm (WOA) was able to reduce fuel consumption and corresponding emissions in a range from 4.04–8.86%, varying with the profiles, by eliminating inefficient working generators and distributing loads for the rest to the nearest possible energy-saving areas. There was also a trade-off between maintenance service and overall system expenses. Finally, a compromise solution was sought with the proposed holistic design for contradictory cost components by taking into account fuel operation consumption, shore electricity supply, maintenance service and investment expenditure.

Technical and economical comparison of optimized diesel-electric propulsion systems for a pleasure craft

“…Tab. 5 shows the generated DE systems main components specific costs [12,16,26,27]. In the table, for each component type, a range of values is reported, the lower one relates to the component characterized by the higher power, the opposite for the components with lower power among those used.…”

“…In the marine high-power diesel-electric plants, the propulsion and power generation systems currently used in large passenger ships, the diesel-generator number is rather standardized [12], while in the small ships, such pleasure craft and yacht, the number of diesel-generators and its optimal power distribution between them do not yet seem sufficiently defined. In the pleasure craft diesel-electric systems, due to propulsion and hotel low electrical power required, different layout configurations can be considered, ranging from plant schemes with few (two) high-power diesel-generators [6], to solutions comprising a greater number of lower power diesel-generators (generally no more than four [13]).…”

Propulsión eléctrica a partir de celdas de hidrógeno: impacto en mitigación de huella de carbono

“…Se considera que un alto porcentaje de las emisiones generadas por las embarcaciones proviene de los sistemas de propulsión y la planta de generación eléctrica, debido a que estos requieren el consumo de combustible fósiles para su funcionamiento [10]. Teniendo en cuenta, las regulaciones impuestas por los países para la disminución de los gases GEI, es necesario como industria marítima encaminar el diseño de las nuevas embarcaciones hacia un camino de sostenibilidad e innovación, por este motivo, han surgido alternativas que cada vez toman más fuerza, como los sistemas de propulsión eléctrica con generación a partir de celdas de hidrógeno y baterías [11].…”

Component Criticality Analysis for Improved Ship Machinery Reliability

“…Figure 1 provides a summary of emissions by transport sector. Accordingly, the International Maritime Organisation (IMO) in line with the UN net-zero targets has put in place measures to reduce shipping emission by 50% by 2030 compared to the 2008 baseline emissions level and net-zero carbon emissions by 2050 [5,6].…”