lpgreen: lpg carrier of tomorrow, concept design · lpgreen: final concept appraisal 10 cargo...

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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

8

+/–

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 george.dimopoulos@dnvgl.com