Innovative Approaches to Energy Efficient Ships Stefano Penco Regional Vice President, Europe Division ABS 1 MARE Forum Istanbul 22 March 2011
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
2
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
5
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
6
Frictional Resistance Reduction
� Low friction coatings
� Polymers
� Nano-technology
� Surface technologies
� Ribblet films
� Surfactants
� Polymer injection
� Air lubrication � Bubble injection
� Air film
� Air cavity
7
Hull Resistance Improvements
8
� 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
9
Ultra-High-Efficiency Heat Exchangers
Boilers, Evaporators & Condensers
LNG Infrastructure & Technical Challenges1
� Availability of LNG fueling terminals
� Ship-to-ship transfer
� Sufficient storage space
11
1 Ships in worldwide trade
� Practical approaches for incremental improvement of in-service operations
� Balancing regulatory requirements with commercial efficiencies without sacrificing safety
12
Optimizing Traditional Designs
13
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