An environmentally sustainable fast sail-assisted feeder-container ship concept, with a maximum speed of 25 knots, has been developed for the 2020 South East Asian and Caribbean container markets. The use of low-carbon and zero-sulphur fuel (liquefied natural gas) and improvements in operational efficiency (cargo handling and scheduling) mean predicted Green house gas emissions should fall by 42% and 40% in the two selected operational regions. The adoption of a Multi-wing sail system reduces power requirement by up to 6% at the lower ship speed of 15 knots. The predicted daily cost savings are respectively 27% and 33% in South East Asian and the Caribbean regions.Two hull forms with a cargo capacity of 1270TEU utilising different propulsion combinations were initially developed to meet operational requirements. Analysis &amp; tank testing of different hydrodynamic phenomena has enabled identification of efficiency gains for each design. The final propulsion chosen is a contra-rotating podded drive arrangement. Wind tunnel testing improved Multi-wing sail performance by investigating wing spacing, wing stagger and sail-container interactions. The associated lift coefficient was increased by 32%. Whilst savings in sail-assisted power requirement are lower than initially predicted an unexpected identified benefit was motion damping.The fast feeder-container ship is a proposed as a viable future method of container transhipment

Burden, Aaron

Hearn, Grant E.

Lloyd, Thomas

Mockler, Simon

Mortola, Lorenzo

Shin, Ie Bum

Smith, Ben

English

Southampton (e-Prints Soton)

A High Performance Automatic Wingsail Auxiliary Propulsion System For Commercial Ships.

Alternative Fuel and Machinery Technologies for Ferries.

An Approximate Power Prediction Method.

Boosting Energy Efficiency.

CB Block coefficient D Depth g Acceleration due to gravity LOA Length overall LWL Waterline length PB Brake power RAW, σAW Added resistance, and associated coefficient T Draught Displacement mass Wave height Wavelength Water density Acronyms:

communication,

Concept Design of a Fast Sail Assisted Feeder Container Ship. Master Thesis.

Containerisation Yearbook.

Deep-Sea Containership Trading Costs. Obtained from David Tozer of Lloyd's Register with the permission of the authors.

Estimation of Wind Assistance Potential.

General Biplane Theory.

Global Wave Statistics. Unwin Brothers,

ibid

Lloyd’s Register Rules and Regulations - Rules and Regulations for the Classification of Ships.

LNG-fuelled RoPax Vessels. The Ship Power Supplier: Wärtsilä Corporation,

LY2 - The Large Commercial Yacht Code. Maritime and Coastguard Agency.

Marine Aerofoil Motion Damping and Related Propulsive Benefits,

New ShipRight Procedure for Container Ships Helps to Assess Hull Stresses (LR SDA). Containership Focus Lloyd's Register

Organisation

Organisation (2005) MEPC/Circular.471 - Interim Guidelines for Voluntary Ship CO2 Emission Indexing for Use in Trials -

Recomended Procedures and Guidelines: 7.5-02-03-01.5 Testing and Extrapolation, Propulsion, Performance, Prediction. Power Margins ITTC

Ship Design for Efficiency and Economy.

Ship Resistance and Propulsion.

SkySails: Turn Wind into Profit.

Some Ship Design Methods.

Concept design of a fast sail assisted feeder container ship

A fast sail assisted feeder container ship concept has been developed for the 2020 container market in the South East Asian and Caribbean regions.The design presented has met the requirements of an initial economic study, with a cargo capacity of 1270 twenty-foot equivalent unit containers, meeting the predictions of container throughput derived from historical data. In determining suitable vessel dimensions, account has also been taken for port and berthing restrictions, and considering hydrodynamic performance. The vessel has been designed for a maximum speed of 25 knots, allowing it to meet the demand for trade whilst reducing the number of ships operating on the routes considered.The design development of the fast feeder concept has involved rigorous analyses in a number of areas to improve the robustness of the final design. Model testing has been key to the development of the concept, by increasing confidence in the final result. This is due to the fact that other analysis techniques are not always appropriate or accurate. Two hull forms have been developed to meet requirements whilst utilising different propulsor combinations. This has enabled evaluation of efficiency gains resulting from different hydrodynamic phenomena for each design. This includes an evaluation of the hydrodynamic performance when utilising the sail system. This has been done using a combination of model test results and data from regression analysis. The final propulsor chosen is a contra-rotating podded drive arrangement. Wind tunnel testing has been used to maximise the performance of a Multi-wing sail system by investigating the effects of wing spacing, stagger and sail-container interactions. This has led to an increase in lift coefficient of 32% from initial predictions. The savings in power requirement due to the sail system are lower than initially predicted. However, another benefit of their installation, motion damping, has been identified. Whilst this has not been fully investigated, additional fuel savings are possible as well as improved seakeeping performance.The design is shown to be environmentally sustainable when compared to existing vessels operating on the proposed routes. This is largely due to the use of low-carbon and zero-sulphur fuel (liquefied natural gas) and improvements in efficiency regarding operation. This especially relates to cargo handling and scheduling. Green house gas emissions have been predicted to fall by 42% and 40% in the two regions should the design be adopted. These savings are also due to the use of the Multi-wing sail system, which contributes to reductions in power requirement of up to 6% when the vessel operates at its lower speed of 15 knots. It is demonstrated that the fast feeder is also economically feasible, with predicted daily cost savings of 27% and 33% in the South East Asian and Caribbean regions respectively. Thus the fast feeder container ship concept is a viable solution for the future of container transhipment. <br/

Molland, Molland, Molland, University

Concept design of a fast sail assisted feeder container ship

Abstract

Similar works

Full text

Available Versions

Southampton (e-Prints Soton)

Southampton (e-Prints Soton)