Innovative Approaches

to

Energy Efficient Ships

Stefano PencoRegional Vice President, Europe Division

ABS

1

MARE Forum

Istanbul22 March 2011

Environmental Challenge

� Reduce environmental footprint for shipping and

offshore

� Short term solutions

� Long term strategies

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Influencing Design Efficiency

� Improving energy efficiency through reducing losses by design� Engine losses (waste heat recovery, engine

de-rating)

� Hull losses (hull form, coating, air lubrication)

� Propeller losses (energy-saving devices)

� Speed reduction

� Capacity increase

� Innovative technology

Installed power x SFC x CF x Contribution of Innovative

Technology Capacity x Speed

3

EEDI

DWT

Reference

Phase 1Phase 2

Phase 3

4

Understand energy losses

0 5 10 15 20 25 30

Wave generation

Air resistance

Hull resistance

Resideual resistance

Weather & waves

Axial loss

Rotational loss

Frictional loss

Trasmission loss

Exhaust

Heat

Loss % (Bunker =100%)

0 5 10 15 20 25 30

Wave generation

Air resistance

Hull resistance

Resideual resistance

Weather & waves

Axial loss

Rotational loss

Frictional loss

Trasmission loss

Exhaust

Heat

Loss % (Bunker = 100%)

Tanker

Containership

Data source: Second IMO GHG Study, 2009

Example: Improving Propulsive Efficiency

� Know the wake quality� Know the proportion of different losses� CFD is the tool

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Design

operation

range

J = advance coefficient = V/(n*D)

New Technology

� Nano-engineering for surfaces and coatings� Ceramic nano-coatings� Hydrophobic surfaces

creating aircushion effect on hull

� Application of pressure sensor technology� Sensing the currents

� Carbon capture for ships

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Frictional Resistance Reduction

� Low friction coatings

� Polymers

� Nano-technology

� Surface technologies

� Ribblet films

� Surfactants

� Polymer injection

� Air lubrication � Bubble injection

� Air film

� Air cavity

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Hull Resistance Improvements

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� Optimization of main dimensions

� Optimization of fullness (Cb) and center of buoyancy (lcb)

� Bow design: good performance in waves (ex: ax bow, SEA-Arrow bow, seaworthy bow)

� Stern design in combination with propeller, rudder and energy saving device

� Twin propeller design (depend on length, beam and draft restrictions)

Hull Form Design

Desalination (MSF Plant) (Abudhabi, UAE)

Yuba power

plant steam condensers

Hybrid Surface: Controlled NucleationMarine Heat Exchangers

Novel nano-

engineered

surfaces would

result in ~ 10-fold

enhancement in

heat transfer

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Ultra-High-Efficiency Heat Exchangers

Boilers, Evaporators & Condensers

� LNG

� Bio-fuels

� Nuclear Propulsion

� Fuel Cells

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Low Carbon Fuels

LNG Infrastructure & Technical Challenges1

� Availability of LNG fueling terminals

� Ship-to-ship transfer

� Sufficient storage space

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1 Ships in worldwide trade

� Practical approaches for incremental improvement of in-service operations

� Balancing regulatory requirements with commercial efficiencies without sacrificing safety

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Optimizing Traditional Designs

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Engine Room discharges

Engine and combustion emissions

Discharges from accommodations

Cargo-related discharges

Ballast water discharges

Deck discharges

Hull coating

Ship recycling

Bio-fouling

Other

CO2 emission reduction

Note: Red categories

addressed by

ENVIRO and ENVIRO+

notations

Eco-friendly & Energy Efficient Ships

www.eagle.org

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