Optimization of fuel consumption in shipboard power systems

Zahedi, Bijan; Norum, Lars; Ludvigsen, Kristine Bruun

doi:10.1109/iecon.2013.6699290

Cited by 7 publications

(9 citation statements)

References 16 publications

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“…This makes the DC distribution is more feasible in various applications [12]. Therefore, the use of a HPS with DC distribution enables easier integration of RESs and ESSs [10,15]. In addition, synchronization of generation units is not required which enables the prime movers to operate at their optimal speeds providing a reduction of fuel consumption and emissions [10,16].…”

Section: Introductionmentioning

confidence: 99%

Power management optimization of hybrid power systems in electric ferries

Al-Falahi

Nimma

Jayasinghe

et al. 2018

Energy Conversion and Management

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General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.? Users may download and print one copy of any publication from the public portal for the purpose of private study or research. ? You may not further distribute the material or use it for any profit-making activity or commercial gain ? You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us at vbn@aub.aau.dk providing details, and we will remove access to the work immediately and investigate your claim. Abstract-The integration of more-electric technologies, such as energy storage systems (ESSs) and electric propulsion, has gained attention in recent years as a promising approach to reduce fuel consumption and emissions in the maritime industry. In this context, hybrid power systems (HPSs) with direct current (DC) distribution are currently gaining a commendable interest in research and industrial applications. This paper examines the impact of using HPS with DC distribution and a battery energy storage system (BESS) over a conventional AC power system for short haul roll-on/roll-off (RORO) ferries. An electric ferry with a HPS is modeled in this study and the power management system is simulated using the Matlab/Simulink software. The result is validated using measured load profile of a ferry. The performance of the DC HPS is compared with the conventional AC system based on fuel consumption and emission reductions. An approach to estimate the fuel consumption of the diesel engine through calculation of specific fuel oil consumption (SFOC) is also presented. This study uses two optimization techniques: a classical power management method namely Rule-Based control (RB) and a meta-heuristic power management method known as Grey Wolf Optimization (GWO) to optimally manage the power sharing of the proposed HPS. Fuel consumption and emission indicators are also used to assess the performance of the two power management methods. The simulation results show that the HPS provides a 2.91 % and 7.48 % fuel consumption reduction using RB method and GWO method respectively. It is apparent from the result that the HPS has more fuel savings while running the diesel generator sets (DGs) at higher operational efficiency. It is interesting that the proposed HPS using both power management methods provided a 100 % emission reduction at berth. Finally, it was found that using a meta-heuristic optimization algorithm provides better fuel and emission reductions than a classical method.Keywords-Battery, DC power system, electric ferry, energy storage system, hybrid power system, power management.

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Section: Introductionmentioning

confidence: 99%

Power management optimization of hybrid power systems in electric ferries

Al-Falahi

Nimma

Jayasinghe

et al. 2018

Energy Conversion and Management

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“…The move to the MVDC electrical distribution system removes these synchronization requirements, as the generators are interfaced to the rectifiers and the diesel engines could be operated at variable speeds, achieving optimum fuel consumption and efficient system operation. Possible technologies, for the MVDC supply, have been discussed in literature, highlighting the possible prime movers, generators, rectifiers and energy storage that could be used [6]- [12]. In [6], 7% fuel savings is predicted for the MVDC electrical distribution, where two similar ship onboard systems are compared with one having MVAC and the other with MVDC electrical distribution.…”

Section: Introductionmentioning

confidence: 99%

MVDC Supply Technologies for Marine Electrical Distribution Systems

et al. 2018

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“…Gas turbines, steam turbines or combined cycle turbines can also be found, wherever gas is available as a cheaper alternative e.g., for high speed vessels or LNG tankers [11]. Efforts are being made to optimize ICEs for fuel efficiency, but it is still around 40% and also the emissions are fairly high [5]. Variable speed operations of the prime movers, as suggested for dynamic ac (DAC) and dc on-board electrical power distribution, provide a way to make the operation of ICEs more efficient [12].…”

Section: A Prime Moversmentioning

confidence: 99%

“…The future dc systems on ships can provide possible fuel savings by utilizing variable speed operation of generators, as highlighted in [4] for a demonstrative low voltage dc (LVDC) electrical distribution system showing a fuel saving of up to 20%. A comparative analysis of MVDC and MVAC systems, carried in [5], predicts 7% fuel savings. In addition to the variable speed operation of prime movers, the MVDC systems also provide the opportunity to utilize high speed prime movers and generators, resulting in reduced footprint of installed equipment and increased energy density.…”

Section: Introductionmentioning

confidence: 99%

Marine MVDC multi-phase multi-pulse supply

Javaid

Freijedo

Dujić

et al. 2017

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

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Abstract-This paper presents comparative evaluation and explores the different technologies suitable for the implementation of the Medium Voltage Direct Current (MVDC) electrical supplies for the marine on-board electrical distribution network. To realize the MVDC supply in the range from 5 kV to 25 kV, various technological choices are available during the design process and have a direct influence on the overall system performances. In this work we discuss different prime movers, choice of electrical generators and type of rectifiers. Different configurations are characterized with different metrics, in terms of commercial availability, quality of supply, efficiency, dynamic performance and volume. Multi-phase multi-pulse supply configurations are identified to provide high quality dc supply and recommended for marine MVDC distribution.

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Optimization of fuel consumption in shipboard power systems

Cited by 7 publications

References 16 publications

Power management optimization of hybrid power systems in electric ferries

Power management optimization of hybrid power systems in electric ferries

MVDC Supply Technologies for Marine Electrical Distribution Systems

Marine MVDC multi-phase multi-pulse supply

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