LPGreen: LPG Carrier of tomorrow, Concept Design · LPGreen: Final concept appraisal 10 Cargo handling: −Design for faster loading −Reduced energy demand −Reduced reliquefacton

#WGC2018FUELING THE FUTURE

LPGreen: LPG Carrier of tomorrow, Concept Design

George Dimopoulos Ph.D.

DNV GL


Introduction

2

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.

#WGC2018FUELING THE FUTURE 3

LPGreen Project – Partners’ rationale

Ship owner Cargo systemsShip Yard System integrator

Cooperation between industry leaders


LPGreen approach

3 main pillars:

4

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


LPGreen Philosophy

5

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


Hull form & Hydrodynamics

6

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)


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)

7

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


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


Model-based integrated machinery system assessment

• Integration between sub-systems captured

• Interrelations and trade-offs

• Hull / Machinery / Cargo systems performance

• Operating profile & modes

9


LPGreen: Final concept appraisal

10

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


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

11

LPGreen


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]

mailto:[email protected]

Documents

LPGreen: LPG Carrier of tomorrow, Concept Design · LPGreen: Final concept appraisal 10 Cargo handling: −Design for faster loading −Reduced energy demand −Reduced reliquefacton