A comparative study on the design of an environmentally friendly RoPax ferry using CFD

Kavli, Herman Peder; Oğuz, Elif; Tezdogan, Tahsin

doi:10.1016/j.oceaneng.2017.03.043

Cited by 20 publications

(7 citation statements)

References 28 publications

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“…Four different types of mesh grid refinements were classified as coarser, coarse, medium, and fine. A mesh refinement factor, r, was chosen as √2 as used by Tezdogan et al, (2015),Peder Kavli et al (2017 and Momchil et al (2018).…”

Section: Grid Sensitivity Studymentioning

confidence: 99%

Investigating the effect of biofouling on propeller characteristics using CFD

Owen

Demirel²,

Oğuz³

et al. 2018

Ocean Engineering

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Increasing pressure is being placed on the marine industry to address ship emissions, regulations to govern the efficient operation of ships in the form of the Energy Efficiency Design Index (EEDI) and Energy Efficiency Operation Index (EEOI) have recently come into force. All aspects of ship design and operation that impact the energy efficiency of ships are subject to revaluation. This paper investigates the detrimental effects of biofouling on the performance of Potsdam Propeller Test Case (PPTC) propeller using Computational Fluid Dynamics (CFD). A previously-developed CFD approach for approximating the surface roughness due to biofouling has been applied in order to predict the effects on propeller characteristics. The roughness effects of a typical coating and different fouling conditions on the propeller performance were predicted for various advance coefficients. The effect proved to be drastic with the most severe fouling condition resulting in a 11.94% efficiency loss at J=0.6 ranging to an alarming 30.33% loss at J=1.2 compared to the smooth condition. The study acts as a proof of concept for the proposed CFD assessment method which can be used as a very practical approach to predicting the impact of realistic fouling conditions on propeller characteristics and energy efficiency.

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Section: Grid Sensitivity Studymentioning

confidence: 99%

Investigating the effect of biofouling on propeller characteristics using CFD

Owen

Demirel²,

Oğuz³

et al. 2018

Ocean Engineering

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“…The International Maritime Organization (IMO) introduced a number of regulations such as maritime pollution (MARPOL) Annex VI (2014). According to MARPOL Annex VI, oil companies and engine manufacturers have to follow stringent rules and guidelines in order to decrease SOx and NOx emissions [2]. Since the regulatory legislation for ship emissions in the maritime industry has brought the need for improving energy efficiency for environmental benefits, organizations, and governments that started to give funds for research and development studies in this field.…”

Section: Introductionmentioning

confidence: 99%

Selection of the Most Sustainable Renewable Energy System for Bozcaada Island: Wind vs. Photovoltaic

Oğuz

Şentürk

2019

Sustainability

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Energy production without destroying the environment has been one of the most crucial issues for people living in today’s world. In order to analyze whole environmental and/or economic impacts of the energy production process, life cycle assessment (LCA) and life cycle cost (LCC) are widely used. In this study, two distinct renewable energy systems are assessed. First, a land-based wind farm, which has been operating in Bozcaada Island since 2000, is compared to a proposed solar photovoltaic power plant in terms of Energy Pay-Back Time (EPBT) periods and greenhouse gas (GHG) emissions and life cycle cost. The energy production process including the recycling phase evaluated “from cradle to grave” using GaBi software for both cases. All scenarios are compared by considering different impact categories such as global warming potential (GWP), acidification potential (AP), and eutrophication potential (EP). Following this, levelized unit cost to produce 1 MWh electricity (LUCE) is calculated for both systems. This study revealed that LCA and LCCA are useful and practical tools that help to determine drawbacks and benefits of different renewable energy systems considering their long-term environmental and economic impacts. Our findings show that onshore wind farms have a number of benefits than proposed photovoltaic power plants in terms of environmental and cost aspects.

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“…δSN =δT + δG + δI (12) For the grid-spacing convergence error δG and time-step convergence error δT, the uncertainty is predicted using Roache's (1998) grid convergence index (GCI) method, which was presented by Celik et al (2008). This is a very useful method to estimate the uncertainties arising from grid-spacing and time-step errors (Kavli et al, 2017). Firstly, the convergence ratio Rk can be obtained by:…”

Section: Verification Studymentioning

confidence: 99%

An investigation into fishing boat optimisation using a hybrid algorithm

et al. 2018

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The optimisation of high-speed fishing boats is different from the optimisation of other displacement type vessels as, for high-speed fishing boats, the wave-making resistance decreases while the splashed resistance increases sharply. To reduce fuel consumption and operating costs in the current economic climate, this paper presents a fishing boat optimisation approach using a Computational Fluid Dynamics (CFD) technique. The RANS-VoF solver was utilised to calculate total resistance, sinkage and trim for a fishing boat in calm water. The Arbitrary Shape Deformation (ASD) technique was used to smoothly alter the geometry. A hybrid algorithm was presented to solve the complicated nonlinear optimisation problem. Herein, a Design of Experiments (DoE) method was applied to find an optimal global region and a mathematical programme was employed to determine an optimal global solution. Under the same displacement with the original hull, two optimisation loops were built with different design variables. After completion of the optimisation, two optimal hull forms were obtained. The optimisation results show that the optimisation loop presented in this study can be used to design a suitable fishing boat in the reduction of the total resistance in calm water.

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A comparative study on the design of an environmentally friendly RoPax ferry using CFD

Cited by 20 publications

References 28 publications

Investigating the effect of biofouling on propeller characteristics using CFD

Investigating the effect of biofouling on propeller characteristics using CFD

Selection of the Most Sustainable Renewable Energy System for Bozcaada Island: Wind vs. Photovoltaic

An investigation into fishing boat optimisation using a hybrid algorithm

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