lpgreen: lpg carrier of tomorrow, concept design · lpgreen: final concept appraisal 10 cargo...
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#WGC2018FUELING THE FUTURE
LPGreen: LPG Carrier of tomorrow, Concept Design
George Dimopoulos Ph.D.
DNV GL
#WGC2018FUELING THE FUTURE
Introduction
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LPGreen’s objective:
develop a more cost efficient, environmentally
friendly, and safer LPG carrier using latest
developed technology, within the bounds of
existing shipbuilding methods.
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LPGreen Project – Partners’ rationale
Ship owner Cargo systemsShip Yard System integrator
Cooperation between industry leaders
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LPGreen approach
3 main pillars:
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LPGreen
Design for trade
Efficiency &
Economic viability
Cargo and fuels
flexibility
Work areas:
Ship design & hull form
Cargo and Fuel handling
Integrated machinery
Overall Techno-economic
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LPGreen Philosophy
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Improve cargo handling
systems and operations
Further optimise hull form and
hydrodynamic performance
Improve overall energy efficiency
Introduce LPG as fuel
LPGreen
Design for Trade
Competitive baseline
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Hull form & Hydrodynamics
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2% to 4.5% Propulsion demand reduction
Calm Water Adder Resistance in Waves
2.0% to 3.4% Added resistance reduction
(average on typical US-China route)
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Cargo handling systems
• Higher capacity compressors with variable frequency drives
• 2 x reliquefaction plants + butane condenser
• Potential reduction in cargo handling room space and requirements
• Development of unmanned cargo machinery room concept
• Improvements vary with cargo type and operations
• (Interface with LPG fuelled concept)
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Cargo
tanks
Reliquefaction
plant
Loading
line
Up to
30%
Up to
5%
Up to
5%
Faster Loading Less energy @
loading
Less energy @
sailing
Deck tank
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LPG as a fuel• LPG-fuelled engine technology
available
• LPG fuel handling concept developed
• Deck fuel (and buffer) tank required
• Deck tank offers additional benefits for cargo handling
• Additional CAPEX estimated
• Technical Feasibility
• Commercial and chartering framework needs to be developed
• Initiate / provoke discussion
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+/–
CAP 2020 compliance
Favourable price differential
Lower consumed quantity due to the higher LHVCAPEX & complexityCommercial frame not in place
Deck Tank
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Model-based integrated machinery system assessment
• Integration between sub-systems captured
• Interrelations and trade-offs
• Hull / Machinery / Cargo systems performance
• Operating profile & modes
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LPGreen: Final concept appraisal
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Cargo handling:
−Design for faster loading
−Reduced energy demand
−Reduced reliquefacton plant size
Hull and propeller
−Optimised for calm water / waves
−Multiple speeds and loading conditions
−Energy saving devices
Tank design
−New IGC code / IMO Tier 3
−Higher tank design pressure
Machinery configurations:
−Improved overall efficiency
−Conventional and LPG as a fuel
LPG as fuel
−Technical feasibility
−SOx CAP compliant
−Reduction of fuel expenses
LPGreen
LPGas fuel,
technically feasible
5-8%Overall Efficiency
Improvement
15%Reduction of Fuel
Expenses
30%Reduction of
Loading time
Up to
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Conclusions
• Innovation to develop more competitive ship designs
• Collaboration paradigm: industry leaders across geographies
• Advanced methods and tools that manage complexity in practice
• LPGreen: new VLGC concept design• Trade and operational practice @ the core• Improved energy efficiency & cargo handling• Can be built today
• Robust decision making supported
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LPGreen
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Thank you!
LPGreen: concept design VLGC of tomorrow,
… that can be ordered and build today!
LPGreen
For more information:
George Dimopoulos Ph.D.
Principal Specialist,
Manager R&D and Advisory, DNV GL
E-mail [email protected]