_ LNG ready Neptun Ship Design

_Ship Design Aspects – LNG as Fuel

1 Wärtsilä LNG in practice; Stockholm - ‘Viking Grace‘ 18.09.2013

_LNG ready

Neptun Ship Design

LNG

READY



_LNG Experiences2009 – Design offer for a LNG-fuelled

power plant – inquired by MAN

Today All new designs with different levels of pre-outfitting for

LNG

2009/10 – Investigation to convert a conventional

Ship Design to a gas fuelled one.

Partners: MAN/GL

Ref. MAN

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



_LNG cleanest option to fulfil MARPOL Annex VI

Ref. www.dieselnet.com

SOx ECA

1,5%

Date

Sul fur Limit in Fuel (% m/m)

Global

2000

2010.07

a - a l ternative date i s 2025, to be decided by a review in 2018

2015

2020a

4,5%

1,0%

0,1%

3,5%

0,5%

2012

Date n < 130 130 < n < 2000 n > 2000

Tier I 2000 17,0 45 x n- 0,2 9,8

Tier I I 2011 14,4 44 x n- 0,23 7,7

Tier I I I 2016a

3,4 9 x n- 0,2 1,96

Tier

a - a l ternative date i s 2025, to be decided by a review in 2018 - MEPC 65 proposed to postpone Tier I I s tandard to 2021

Nox Limit, g/kWh

LNG reduce (LNG as fuel ship)Greenhouse gas : 26%Particular matter (PM) : 100%Sulfur oxide (Sox) : 100%Nitrogen oxide (Nox) : 80-90% By converting from Fuel Oil to LNG, the above figures will be achieved



_LNG cloud or another Loop in Ship Design

LNG

North Sea

ECAMARPO

L Baltic Sea

North America

TIER II

TIER III

Main Engine

High PressureGas tank

4 stroke

Aftertreatment

Liquid fuel as second or as

back-up

Gas mode optimized

EGRSCR

Gas System

Gas prepare

Low Pressure

2 strokeCylindrical Prismatic

Vacuum

Gas transfer

Bunkering

Boil off

Safety 2nd barrier Inertizing

Blow off

Bursting discs

RulesIGF code

Class MSC.285(86)



_LNG how to start?

Main Design Criteria

Best Transport Efficiency (TE) for Intended Service

TE = ____________TEUhom x nm

FGC

Service – Transportation Task defined by Owners according real needs



_Decision for Main EngineOtto cycle againstDiesel cycleLow pressure <10 barHigh pressure up to 300 bar4 stroke and 2 stroke 2 stroke

Pilot/ Liquid fuel1%

3-5%Amount of liquid fuel constant Amount of liquid fuel increase with

lower loadsOperating at all loads in gas mode At 15-20% load switch to

100% liquid fuelMaximum output

Optimized for gas operation Diesel engine operating on liquid fuel

and gasOperating with liquid fuel is lessefficient, just back-up onlyLower maximum outputSame maximum output like conven-

tional oneAftertreatment

Tier III in gas mode Tier III in gas mode by EGRTier III in liquid fuel mode by SCR Tier III in liquid fuel mode by EGRNo aftertreatment in gas modeAftertreatment in all modes

Methan slip2-4% of SFOC

0.1% of SFOCGas quality

Min. Methan Number of 80, No limits for methan numberwhich is near half of global supply



_Decision for Main EngineThere still remains the question for the decision maker:Trust, Experiences, Better Marketing, Needs, Advantages?



_LNG Tank Arrangement

LNG storage tanks

Aluminum alloy

Aluminum alloy Stainless steel

IMO Type C

Cylindrical Double wall

Stainless steel (Outer: Carbon steel)

Cylindrical Single wall

IMO Type B (or A)

Spherical

Prismatic

Stainless steel

9% Nickel (incl. Bi-lobe shape)

Aluminum alloy

Normal capacity range per a tank

Normal design pressure range

0.2 - 1.0 MPaG

0.2 - 0.75 MPaG

0.025 - 0.07 MPaG

1 - 500 m³

1 - 500 m³

1,000 - 5,000m³

200 - 6,000 m³

10,000 - 60,000 m³

from up 800 m³



_LNG Tank Arrangement

Challenge of Compromise

FactsRiskTarget

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



_LNG Tank Arrangement proposals

Advantage:- No loss of cargo space- Fits for later installation

Disadvantage:- Weight distribution aft- High COG




Advantage:- No loss of cargo space- Lower COG than proposal

before

Disadvantage:- Partially suitable for later

installation




Advantage:- Best regarding COG and

weight distribution- Nearest to Engine room

Disadvantage:- Loss of cargo space- No later installation



_Development project for Hansa Shipping

LNG

READY



Loops of Ship Design Process

_Basic Design Requirements

Owners Requirements: technical specification, description of the vesseloperational profile

Class Requirements: construction rules LR, DNV, GL, BV …

Statutory Rule Requirements: IMO, SOLAS, MARPOLto consider: emission control areas heat recovery systemsEEDI - indexballast water treatment

Economic Requirements: minimized service costfuel oil efficiencyminimized constructioncost (Light ship weight),effective design process



The managing partners are: Mr. Gerald HadaschikMr. Helge SellMr. Stephan MerkelMr. Roland Gräber

Neptun Ship Design GmbH Kurt-Dunkelmann-Str. 4, Geb. 24718057 Rostock, GermanyPhone: +49 (0) 381 609 12-0Fax: i+49 (0) 381 609 [email protected]

www.neptun-germany.com

_Address

http://www.neptun-germany.com/fileadmin/bilder/06_contact/map2.gif

_ LNG ready Neptun Ship Design

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