Computational Analysis of Air Lubrication System for Commercial Shipping and Impacts on Fuel Consumption

Fotopoulos, Andreas G.; Margaris, Dionissios P.

doi:10.3390/computation8020038

Cited by 11 publications

(7 citation statements)

References 2 publications

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“…"A layer of air is generated between the specially profiled underside and water surface, so that the vessel effectively glides through the water, reducing drag by 5-15%" ( [176], p. 20). Fotopoulos and Margaris [177] numerically investigated two separate geometries with a commercial computation fluid dynamics (CFD) software, looking at the effect of air lubrication on fuel consumption, and estimated that it can be reduced by 8%.…”

Section: Air Lubricationmentioning

confidence: 99%

Decarbonization in Shipping Industry: A Review of Research, Technology Development, and Innovation Proposals

Mallouppas¹,

Yfantis²

2021

JMSE

157

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This review paper examines the possible pathways and possible technologies available that will help the shipping sector achieve the International Maritime Organization’s (IMO) deep decarbonization targets by 2050. There has been increased interest from important stakeholders regarding deep decarbonization, evidenced by market surveys conducted by Shell and Deloitte. However, deep decarbonization will require financial incentives and policies at an international and regional level given the maritime sector’s ~3% contribution to green house gas (GHG) emissions. The review paper, based on research articles and grey literature, discusses technoeconomic problems and/or benefits for technologies that will help the shipping sector achieve the IMO’s targets. The review presents a discussion on the recent literature regarding alternative fuels (nuclear, hydrogen, ammonia, methanol), renewable energy sources (biofuels, wind, solar), the maturity of technologies (fuel cells, internal combustion engines) as well as technical and operational strategies to reduce fuel consumption for new and existing ships (slow steaming, cleaning and coating, waste heat recovery, hull and propeller design). The IMO’s 2050 targets will be achieved via radical technology shift together with the aid of social pressure, financial incentives, regulatory and legislative reforms at the local, regional and international level.

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Section: Air Lubricationmentioning

confidence: 99%

Decarbonization in Shipping Industry: A Review of Research, Technology Development, and Innovation Proposals

Mallouppas¹,

Yfantis²

2021

JMSE

157

View full text Add to dashboard Cite

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“…This phenomenon would reduce the frictional force of the ship, the air lubrication method. In the study of Fotopoulos, it was shown that the app of the air lubrication method could reduce the skin friction coefficient by 0.0023 to [29]. The total resistance component consisted of frictional resistance and resid sistance.…”

Section: The Influence Of Spray Strip Profilementioning

confidence: 99%

A Numerical Study of Spray Strips Analysis on Fridsma Hull Form

Samuel

Trimulyono

Manik

et al. 2021

Fluids

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Spray strips are deflectors added to the hull to reduce the Wetted Surface Area (WSA). The reduced WSA will decrease the total ship drag caused by the deflection of the spray strip installation. The research aimed to predict the function of the spray strip to improve ship performance using Computational Fluid Dynamics (CFD). The numerical approach in this study used the Finite Volume Method (FVM) with the RANS (Reynolds-averaged Navier–Stokes) equation to solve fluid dynamics problems. VOF (Volume of Fluid) was used to model the water and air phases. The results of this study indicated that the number of spray strips would have a significant effect compared to without using a spray strip. Spray strips with three strips could reduce the total resistance by 4.9% at Fr 1.78. Spray strips would increase the total resistance value by 2.1% at low speeds. Spray strips were effective for reducing total resistance at Fr > 1 or the planing mode conditions. The total resistance prediction used three suggestion profiles with the best performance to reduce total resistance by 6.0% at Fr 1.78.

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“…-Design: Hull shapes (Lindstad et al, 2016) [11], Hydrodynamic Appendages, Air lubrication (8%) (Fotopoulos & Margaris, 2020) [12], Paints (H. Wang & Lutsey, 2013) [13], Heat recovery systems , OPS (Iris & Lam, 2019) [14], etc.…”

Section: Introductionmentioning

confidence: 99%

LNG versus conventional fuel powered vessels: Environmental impact of ropax ships

Herrero Martinez,

González Gutierrez,

Ortega Piris

et al. 2024

Maritime Transport Conference

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Decarbonization and environmental respect have become pillars of European government policies. As a result of this direction and given that 80% of global freight transportation is carried out by ships, maritime transport emerges as one of the target sectors for these eco measures. Numerous initiatives, projects, and new technologies focused on this field exist. This paper examines the potential reduction of CO2 emissions by using LNG as a fuel either in combination with or instead of conventional fuel on RO-Pax ships. Taking advantage of the fact that we are facing a 'mature' technology already being applied in many ships. Emissions from a fleet of about 30 ships have been studied during the years 2019, 2020, 2021,2022 and 2023 where progressively adding LNG powered vessels from 4 up to 11 during 2023. Based on their annual consumptions’ reports (HFO, MGO and LNG) total tons of polluted CO2 have been quantified together with the ratio tons of CO2 per sailed mile. On the other hand, known daily burned marine fuels of one of those vessels sailing Balearic Islands-Mainland Spain route and due to high increase of gas prices during 2021 and beginning of 2022 (about 350%) a study was conducted: consuming LNG for 265 days whenever possible and avoiding this fuel for 143 days. Therefore, based on the same ship/route, a particular comparison of CO2 emissions per nautical mile is obtained. Finally, using above results, hypothetical study is carried out in which emissions are estimated based on the sailed miles during years 2017 to 2021: Potential emissions in case of LNG versus conventional fuel powered. The 5-year result shows about 17.08% potential reduction. Approximately 32700 tons of CO2 only for 1 vessel highlighting the huge importance of the LNG powered vessels to reduce the environmental impact and the great importance of the investments on Research, Development and Innovation.

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Computational Analysis of Air Lubrication System for Commercial Shipping and Impacts on Fuel Consumption

Cited by 11 publications

References 2 publications

Decarbonization in Shipping Industry: A Review of Research, Technology Development, and Innovation Proposals

Decarbonization in Shipping Industry: A Review of Research, Technology Development, and Innovation Proposals

A Numerical Study of Spray Strips Analysis on Fridsma Hull Form

LNG versus conventional fuel powered vessels: Environmental impact of ropax ships

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