Evaluation of the environmental and economic impacts of electric propulsion systems onboard ships: case study passenger vessel

Ammar, Nader R.; Seddiek, Ibrahim S.

doi:10.1007/s11356-021-13271-4

Cited by 27 publications

(12 citation statements)

References 50 publications

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“…The calculation of the ellipticity angle for an orthogonal-circular basis was performed according to (6); the calculation of the ellipticity angle for an orthogonal-elliptical basis was performed according to (16).…”

Section: Determination Of the Amplitude Of The Stator Phase Currents ...mentioning

confidence: 99%

“…Squirrel-cage induction motors are widely used in various industries and transport. They are used in technological lines of heavy engineering [9,10], as traction motors on railway rolling stock [11][12][13], as auxiliary equipment on railway rolling stock [14,15] and in water transport [16,17]. Thus, the quality and accuracy of the execution of technological processes depend on the technical condition of induction motors.…”

Section: Introductionmentioning

confidence: 99%

“…Calculate the ellipticity angle for an orthogonal-circular basis using Formula (6), calculation of the ellipticity angle for an orthogonal-elliptical basis by Formula (16) and calculation of the ellipse tilt angle by Formula (17).…”

mentioning

confidence: 99%

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Method for Determining the Degree of Damage to the Stator Windings of an Induction Electric Motor with an Asymmetric Power System

Gerlici

Goolak²,

Gubarevych³

et al. 2022

Symmetry

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A method is proposed for determining the number of damaged stator windings in the presence of an asymmetric power supply system for an induction electric motor based on the Park vector hodograph. As a result of the experiments on the simulation model, it was found that with the symmetry of the system of supply voltages and stator windings, the hodograph of the Park vector describes a circle; in all other cases it is an ellipse. It has been established that the presence of asymmetry in the supply voltage system is indicated by the angle of inclination of the ellipse, and the indicator of the presence of the asymmetry of the stator windings is the angle of ellipticity. In order to identify the presence of asymmetry of the stator windings in the conditions of asymmetry of the supply voltage system, an algorithm for recalculating the ellipse parameters for the condition of the symmetry of the supply voltage system was proposed. Recalculation errors did not exceed 6%. It has been established that the dependence of the increment of the amplitudes of the phase and angles of the phase currents of the stator on the number of damaged turns of the stator winding is linear. Based on this fact, an algorithm for determining the number of damaged turns was proposed. The results of this work can be used to build systems for diagnosing the interturn short circuit of the stator of an induction electric motor built into the drive.

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Section: Determination Of the Amplitude Of The Stator Phase Currents ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Method for Determining the Degree of Damage to the Stator Windings of an Induction Electric Motor with an Asymmetric Power System

Gerlici

Goolak²,

Gubarevych³

et al. 2022

Symmetry

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show abstract

“…As a result, they tried to show the margins and places of error between the two data. Ammar and Seddiek (2021), in their study, compared two different propulsion systems for a passenger ship. They compared the battery-free DE propulsion system and the COGES system from an environmental and economic perspective.…”

Section: De Propulsion System Focus On Last 20 Yearsmentioning

confidence: 99%

The Historical Process of the Diesel Electric Propulsion System

Pamık

Nuran

2021

Dokuz Eylül Üniversitesi Denizcilik Fakültesi Dergisi

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Increasing in harmful gas emissions caused by the use of fossil fuels harms the environment that is difficult to recover. Regulations are being implemented in order to reduce these effects in the maritime field and it is getting harder and also tough to adapt these constantly developed regulations with the existing conventional propulsion systems. Especially considering environmental factors, technological developments in conventional propulsion systems reach a certain saturation and become insufficient so that researchers have turned to work in the field of electrical propulsion systems. In this study, development of the Diesel-Electric (DE) propulsion system, which has an important place in EPS, throughout the historical process and its comparison with other EPS are applied. According to the results obtained, DE propulsion system can be applied to many ship types, furthermore, this system provides gains in terms of NOX, SOX and CO2 emissions, energy efficiency, fuel consumption, life cycle and cost. However, the initial investment cost is the biggest shortcoming of DE propulsion system.

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“…On the other hand, the emission factors are 539 g/kWh, 16.4 g/kWh and 3.29 [g/kWh] for CO 2 , NOx and SOx respectively for conventional diesel engine operated with MDO (1%S)(Elkafas et al 2021a). Furthermore, the energy e ciency of the case study can be assessed by using the EEDI procedure(Ammar and Seddiek 2021). EEDI can be assessed by calculated the reference value through Eq.…”

mentioning

confidence: 99%

Investigation of ship electric propulsion system performance from environmental and energy efficiency perspective

Elkafas

Shouman

2021

Preprint

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The maritime industry faces many challenges regarding the adverse environmental impact, whether at the level of legislation set by the International Maritime Organization (IMO) or the economic crises that arising from the Covid-19 pandemic. IMO has found that the highest percentage of ship emission is mainly coming from the ship propulsion systems. Therefore, the current research proposes an electric propulsion system to drive the ship instead of the conventional one to reduce ship emissions and enhance energy efficiency. As a case study, a passenger ship is investigated. The results showed that the proposed electric propulsion system has lower emission rates than the conventional one by 10%, 21%, and 88% for CO2, NOx, and SOx emission, respectively. From an energy efficiency point of view, the diesel-electric propulsion system enhances the energy efficiency and complies with the required IMO values as actual energy efficiency is about 66%, 70%, 83%, and 95% of the required IMO values at baseline, phase 1, phase 2 and phase 3, respectively.

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Evaluation of the environmental and economic impacts of electric propulsion systems onboard ships: case study passenger vessel

Cited by 27 publications

References 50 publications

Method for Determining the Degree of Damage to the Stator Windings of an Induction Electric Motor with an Asymmetric Power System

Method for Determining the Degree of Damage to the Stator Windings of an Induction Electric Motor with an Asymmetric Power System

The Historical Process of the Diesel Electric Propulsion System

Investigation of ship electric propulsion system performance from environmental and energy efficiency perspective

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