Design of PBCF energy saving devices using optimization strategies: A step towards a complete viscous design approach

Gaggero, Stefano

doi:10.1016/j.oceaneng.2018.01.003

Cited by 29 publications

(16 citation statements)

References 29 publications

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“…The owner of the PBCF patent-MOL Techno-Trade-claimed a 5% reduction in ship fuel consumption [102]; however, other literature reported a more conservative improvement. Optimisation studies using CFD and experimental fluid dynamics (EFD) at both model-and full-scale have shown efficiency improvements ranging from 1-4% [103][104][105]. Another hub modification is known as the K-CAP and fins, designed by KRISO.…”

Section: Propeller and Hub Modificationsmentioning

confidence: 99%

Study on Applicability of Energy-Saving Devices to Hydrogen Fuel Cell-Powered Ships

Stark

Zhang

et al. 2022

JMSE

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The decarbonisation of waterborne transport is arguably the biggest challenge faced by the maritime industry presently. By 2050, the International Maritime Organization (IMO) aims to reduce greenhouse gas emissions from the shipping industry by 50% compared to 2008, with a vision to phase out fossil fuels by the end of the century as a matter of urgency. To meet such targets, action must be taken immediately to address the barriers to adopt the various clean shipping options currently at different technological maturity levels. Green hydrogen as an alternative fuel presents an attractive solution to meet future targets from international bodies and is seen as a viable contributor within a future clean shipping vision. The cost of hydrogen fuel—in the short-term at least—is higher compared to conventional fuel; therefore, energy-saving devices (ESDs) for ships are more important than ever, as implementation of rules and regulations restrict the use of fossil fuels while promoting zero-emission technology. However, existing and emerging ESDs in standalone/combination for traditional fossil fuel driven vessels have not been researched to assess their compatibility for hydrogen-powered ships, which present new challenges and considerations within their design and operation. Therefore, this review aims to bridge that gap by firstly identifying the new challenges that a hydrogen-powered propulsion system brings forth and then reviewing the quantitative energy saving capability and qualitive additional benefits of individual existing and emerging ESDs in standalone and combination, with recommendations for the most applicable ESD combinations with hydrogen-powered waterborne transport presented to maximise energy saving and minimise the negative impact on the propulsion system components. In summary, the most compatible combination ESDs for hydrogen will depend largely on factors such as vessel types, routes, propulsion, operation, etc. However, the mitigation of load fluctuations commonly encountered during a vessels operation was viewed to be a primary area of interest as it can have a negative impact on hydrogen propulsion system components such as the fuel cell; therefore, the ESD combination that can maximise energy savings as well as minimise the fluctuating loads experienced would be viewed as the most compatible with hydrogen-powered waterborne transport.

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Section: Propeller and Hub Modificationsmentioning

confidence: 99%

Study on Applicability of Energy-Saving Devices to Hydrogen Fuel Cell-Powered Ships

Stark

Zhang

et al. 2022

JMSE

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“…Alfian Tri Eka Kurniawan did variations in PBCF diameter and cross-section angles, the highest efficiency was obtained at 0,2D and 49 0 however, the angle installation in the section is outside the required range [8]. Gaggero is carried out study of PBCF design using genetic algorithm [9]. The result shows efficiency increased 1%.…”

Section: Introductionmentioning

confidence: 99%

The effect of propeller cap angle and fin size of PBCF on propeller performance

Trimulyono

Jatmiko

Mulyatno

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The propeller was one of the main propulsors in ships that consumed a lot of fuel due to the viscous force acting in the ship. Therefore many studies have been carried out to increase the performance of ship propellers. One of the ways is using Energy Saving Device (ESD) to improve propeller performance. One of the ESD is Propeller Boss Cap Fins (PBCF). PBCF was used to improve the propeller performance by reducing the hub vortex during propeller rotation. In this study, we compare the propeller performance before and after PBCF installation without changing propeller dimensions. The variations of PBCF fins were made in 0,1D, 0,2D, and 0,3D with a combination of the angle of the propeller cap were 15° and 20°. The propeller performance is carried out with the computational fluid dynamics (CFD) method. It was made in the open water assumption to reduce of wall effect. B-series propeller is used in the present study. The validation of propeller performance is made using empirical results. This study aimed to determine the effect of the installation of PBCF on the performance of B-Series propellers on the Ro-Ro 1000 GT ship. The results show that variation with a fin diameter of 0,2D and a propeller cap of 20° can increase propeller efficiency by 0.03%. It can be concluded the addition of PBCF can improve propeller performance.

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“…In this method, Morison equation was solved for a velocity at a certain probability level using two neural network methods and time domain simulation and Gamble fitting method [16]. Gaggero et al (2018) evaluated propulsion efficiency improvements using RBCF device optimization and CFD analysis. In order to solve the RANS equations, parametric descriptions of RBCF properties and an optimization algorithm were applied in Open FOAM software.…”

Section: Introductionmentioning

confidence: 99%

“…In order to solve the RANS equations, parametric descriptions of RBCF properties and an optimization algorithm were applied in Open FOAM software. The results showed that the efficiency of the model scale has increased by about one percent, which can reach a significant amount of four percent in the unrefined propeller design [17]. Nowruzi and Najafi (2019) investigated the effects of three different pre-swirl ducts on the propulsion performance of a Series-60 ship by experimental and numerical methods [18].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulations of the Hydrodynamic Performance of the Propeller with Wake Equalizing Duct behind the Ship

2022

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The equalizing wake flow into the propeller behind the ship is important from the hydrodynamic performance viewpoint. In this study, numerical simulations of the DTMB4119 propeller with two symmetric and asymmetric duct types behind the KRISO container ship (KCS) are performed using computational fluid dynamics (CFD). In order to improve the wake equaling flow, a combined duct and stators configurations were installed before the propeller in the stern of the ship and its hydrodynamic performance was studied using CFD. A duct with the NACA4415 section and two types of stator configurations are selected. The STAR-CCM+ software that uses the finite volume discretization method was used to solve the governing equations of the fluid flow. In simulating the turbulence model, the standard k-ω model was used and the solution method was validated by comparing the available experimental data. Output parameters such as thrust coefficient and torque coefficient in the open-water condition and behind the ship have been presented and discussed. Improvements in the propeller performance after mounting the asymmetric and symmetric ducts are found at 4.8% and 6.57%, respectively. So, it is concluded that the symmetric duct is more affected by the propeller performance and, hence, reduced fuel consumption considerably.

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Design of PBCF energy saving devices using optimization strategies: A step towards a complete viscous design approach

Cited by 29 publications

References 29 publications

Study on Applicability of Energy-Saving Devices to Hydrogen Fuel Cell-Powered Ships

Study on Applicability of Energy-Saving Devices to Hydrogen Fuel Cell-Powered Ships

The effect of propeller cap angle and fin size of PBCF on propeller performance

Numerical Simulations of the Hydrodynamic Performance of the Propeller with Wake Equalizing Duct behind the Ship

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