1. _LNG ready
Neptun Ship Design
LNG READY 1

2. _LNG Experiences
2009 – Design offer for a LNG-fuelled power plant – inquired by MAN
Ref. MAN
2009/10 – Investigation to convert a
conventional Ship Design to a gas fuelled one.
Partners: MAN/GL
2012 – R&D Project – Power Generation Concept for a LNG-Storage and Production Offshore Platform
Ref. Siemens
2011/13 – Design for a Gas Fuelled Feeder Container Vessel.
Approval in Principle by DNV Partner: Hansa Shipping
Today  All new designs with different levels of pre-outfitting for LNG

3. _LNG cleanest option to fulfil MARPOL Annex VI
Ref.

4. LNG ECA MARPOL Main Engine Gas System
_LNG cloud or another Loop in Ship Design
Rules
North America
IGF code
TIER III
MSC.285(86)
ECA
Class
MARPOL
North Sea
Baltic Sea
TIER II
LNG
4 stroke
Boil off
2 stroke
Low Pressure
Cylindrical
Prismatic
High Pressure
Gas tank
Gas prepare
Main Engine
Vacuum
Gas System
Blow off
Gas mode optimized
Liquid fuel as second or as back-up
Safety
Gas transfer
Inertizing
2nd barrier
Aftertreatment
Bursting discs
Bunkering
SCR
EGR

5. Best Transport Efficiency (TE) for Intended Service
_LNG how to start?
Main Design Criteria
Best Transport Efficiency (TE) for Intended Service
FGC
TE = ____________
TEUhom x nm
Service – Transportation Task defined by Owners according real needs

6. _Decision for Main Engine
Otto cycle against Diesel cycle
Low pressure <10 bar High pressure up to 300 bar
4 stroke and 2 stroke stroke
Pilot/ Liquid fuel
1% %
Amount of liquid fuel constant Amount of liquid fuel increase with lower loads
Operating at all loads in gas mode At 15-20% load switch to % liquid fuel
Maximum output
Optimized for gas operation Diesel engine operating on liquid fuel and gas
Operating with liquid fuel is less
efficient, just back-up only
Lower maximum output Same maximum output like conven tional one
Aftertreatment
Tier III in gas mode Tier III in gas mode by EGR
Tier III in liquid fuel mode by SCR Tier III in liquid fuel mode by EGR
No aftertreatment in gas mode Aftertreatment in all modes
Methan slip
2-4% of SFOC % of SFOC
Gas quality
Min. Methan Number of 80, No limits for methan number
which is near half of global supply

7. _Decision for Main Engine
There still remains the question for the decision maker:
Trust, Experiences, Better Marketing, Needs, Advantages?

8. _LNG Tank Arrangement
LNG storage tanks

9. Challenge of Compromise
_LNG Tank Arrangement
Target
Risk
Facts
Substitute of liquid fuel bunker without any losses
Loss of space, dead-weight, stability
3.5-fold space requirement against liquid fuel for C-Tanks and 2.5 for B-Tanks
Challenge of Compromise

10. _LNG Tank Arrangement proposals
Advantage:
No loss of cargo space
Fits for later installation
Disadvantage:
Weight distribution aft
High COG

11. _LNG Tank Arrangement proposals
Advantage:
No loss of cargo space
Lower COG than proposal before
Disadvantage:
Partially suitable for later installation

12. _LNG Tank Arrangement proposals
Advantage:
Best regarding COG and weight distribution
Nearest to Engine room
Disadvantage:
Loss of cargo space
No later installation

13. _Development project for Hansa Shipping
LNG READY

14. _Basic Design Requirements
Owners Requirements: technical specification, description of the vessel
operational profile
Class Requirements: construction rules
LR, DNV, GL, BV …
Statutory Rule Requirements: IMO, SOLAS, MARPOL
to consider:
emission control areas
heat recovery systems
EEDI - index
ballast water treatment
Economic Requirements: minimized service cost
fuel oil efficiency
minimized construction
cost (Light ship weight),
effective design process
Loops of Ship Design Process 14

15. _Address
The managing partners are:     Mr. Gerald Hadaschik Mr. Helge Sell Mr. Stephan Merkel Mr. Roland Gräber Neptun Ship Design GmbH
   Kurt-Dunkelmann-Str. 4, Geb Rostock, Germany Phone: +49 (0) Fax:    i+49 (0)