WORKSHOP 01, May 20-21, 2013

PARTNERS

SUPPORTERS

CO-FINANCED BY

WORKING METHOD

A TRANS-EUROPEAN TRANSPORT NETWORKS (TEN-T) PROJECT Contract No. 2011-EU-92079-S

ASSOCIATED PARTNERS

WORKSHOP 01, May 20-21, 2013

SAFETY AND RELIABILITY OF GAS FUELLED VESSEL

Sören Karlsson, Wärtsilä

Next generation Ro-Pax Ferry

The world’s most environmentally sound large ferry operating commercially

from the 15 January 2013

Wärtsilä scope of supply

• Main engines 4x W8L50DF

• Main propulsion 2 x FPP SILENT 5 blades LOWEST INDUCED

PRESSURE IMPULSE

• 3 Tunnel Thrusters

• 2 x 200 LNGPac systems

• Bunker stations

• 4 x Gas valve units (GVU)

• Compact Silencer system

3 © Wärtsilä

Finalised - DBAB205397 Doc.ID: Revision: Status: 24 / © Wärtsilä

Built Up Propeller (BUP)

• Chosen design was a Wärtsilä

Built-Up propeller instead of a

Monobloc

• Latest design BUP gives similar

efficiency and pressure pulse

levels

• Replacing and repairby

exchanging to easy (de)mountable

blades

• Under water repairs are possible

24 / © Wärtsilä

Final Propeller Design

Tests performed at MARIN:

• Open water efficiency (in design J-

value) 0.705, well above guaranteed

value of 0.69 and very close to our

prediction of 0.70

• Maximum hull pressure fluctuation:

1.1 kPa (85% trial condition), guarantee

was 1.8 kPa

• Construction in stainless steel and ice

class by Wärtsilä hydrodynamic- and

metallurgical- departments and Lloyd’s

Register

Finalised - DBAB205397 Doc.ID: Revision: Status: 24 / © Wärtsilä

Final result and Viking Line’s comments:

STX has done an excellent work, to

design an optimal hull, service speed is

achieved at lower power than even the

most optimistic prediction : Excellent

work!

Wärtsilä propeller design department has

done their home work, and the efficiency

of the propeller is outstanding compared

to existing design : Excellent work!

Meeting class redundancy requirements

Major classification societies rules and IGF guidelines from IMO demand

high redundancy when operating vessels on natural gas (IMO MSC86/26 )

2.6.2.2 In case of leakage in a gas supply pipe making shutdown of the

gas supply necessary, a secondary independent fuel supply should be

available. Alternatively, incase of multi-engine installations, independent

and separate gas supply systems for each engine or group of engines

may be accepted.

2.6.2.3 For single fuel installations (gas only) the fuel storage shall be

divided between two or more LNG tanks of approximately equal size.

24 May 2013 7 © Wärtsilä Fjellstua, Ålesund

GV

U

GV

U

Onboard installation

24 May 2013 8 © Wärtsilä

LNGPac G

VU

DF engine

LNG tank

4-STROKE SINGLE GAS

Single gas engine

4-STROKE DUAL-FUEL

How do you create your redundancy?

Gas processing is

about 25% of gas

fuel system cost

DF Vs SG

Onboard installation

24 May 2013 9 © Wärtsilä

How do you create your redundancy?

Single LNG tank with one cold-

box concept is approved by all

major classification societies

Single LNG tank with two cold-

box concept is NOT approved

by most of major classification

societies

DF Vs SG

Meeting class redundancy requirements

For other gas engines than DF engines, the redundancy requirements can be met

by either of the two following alternatives:

• Installing double LNG tanks and fuel supply systems

• Installing back-up diesel fuel generators

Gas-fuelled ships (not DF) with diesel generators installed for redundancy

Vessel type

Gas engines

[kW]

Diesel engines

[kW]

Propulsion power

[kW]

Ratio diesel engine/ gas

engine installed power [%]

1 2 x 2,600

2 x 3400

2 x 600 4 x 2750 10%

2 1 x 5250 2 x 720 5250 27%

3 2 x 900 1 x 1000 2 x 1000 56%

4 3 x 900

1 x 676

1 x 4000

1 x 400

6500 130%

5 2 x 2380 2 x 3840 2 x 5000 161%

10 © Wärtsilä Fjellstua, Ålesund 24 May 2013

Wärtsilä gas application

Wärtsilä Dual Fuel engines are real GAS engines with flexibility

– Can start in gas mode

– Can stop in gas mode

– Can operate on low load in gas mode

– Can idle in gas

– Can change between gas and liquid fuel on the go

– Can operate on one lube oil for all fuels

– Can operate on cheapest fuel available

24 May 2013 11 © Wärtsilä DF Vs SG

12 © Wärtsilä

Emission comparison – diesel electric propulsion

0%

20%

40%

60%

80%

100%

120%

CO2 NOx SOx Particles

Diesel engine with HFO Diesel engine with MDO DF engine in gas mode

DF engine in diesel mode

Total Greenhouse Gases

13

0%

50%

100%

HFO MDO DF

CH4 as CO2equvialent max

CH4 as CO2eqvialent min

CO2

CH4 as CO2

equivalent when

CH4 part of THC

is max 90%

Based on the ISO defined operating profile

CH4 in THC is 60-90% depending on gas composition

Approx ~20% reduction*

* Based on 32 / 34 bore comparison

CH4 as CO2

equivalent when

CH4 part of THC

is max 60%

CO2

Wärtsilä 50DF - THC

14

25% 50% 75% 100%

Model: -2011 Model: -2012

6 g/kWh

THC consist of Methane (CH4), Non methane hydrocarbons and formaldehydes

Depending of the gas quality CH4 is around 60-90% of the total THC

Dual-Fuel applications - References

6 segments ~190 installations > 6’000’000 running hours

Power

Plants

DF Power Plant

51 installations

186 engines

Online

since1997

Merchant

LNGC

• 108 vessels

• 429 engines

Conversion

• 1 Chem. Tanker

• 2 engines conv.

• Complete gas

train

• Complete

design

Offshore

PSVs/FPSOs

• 20 vessels

• 93 engines

• Online from

1994

New orders:

• Harvey Gulf;

the first 4 LNG-

PSV to be

operated in the

Gulf of Mexico!

Cruise

and Ferry

LNG ferries

• 1 vessels

• 4 engines per

vessel

• Complete gas

train

• 2800

passengers

• In service early

2013

Navy

Coastal Patrol

• DF-Mechanical

• DF main and

auxiliary

engines

Others

Tug

• 2 vessel

• 2 engines each

• Mechanical drive

Guide ship

• 1 vessel

15 © Wärtsilä

LNG - Storage Tanks

The tanks are located in the aft end

• Volume of the tanks 2 x 200m3 ~

160 tonnes LNG

• Gas relief mast located between the

tanks

• Water spray cooling for protection

• LNG evaporation are using the DF

Engine LT-heat and Heat from Air

Condition-system, ”cold recovery

(Wärtsilä patent)

16 © Wärtsilä

LNG project definition

The following requirements were set by the project:

• Fast LNG bunkering during 1 hour at port*)

• Wireless SIGGTO connection for bunker protocol *)

• Operation in gas mode, simultaneously bunkering LNG *)

• Utilize the latent heat in LNG for vessel HVAC system (air conditioning)

Wärtsilä patent *)

• Feeding both engine rooms from one LNGPac

• LNG tank located above bunker station. How to drain the LNG? *)

• First gas fuelled RoPax

• Bunkering line prepared for keeping LNG in all the time.

• No class rules available by LR

*) = First LNG fuelled vessel with these requirements

17 © Wärtsilä

Design process of the LNGPac

• System design and component choosing

• Collecting Input of design parameters:

accelerations..

• Pipe 3D Design

• Stress analyses of the pipe system

• FEM analyse of the tank- and aux-room structure

• Bottom pipe design

• Bunker station design

• Tank design

• Analyses FMEA of LNGPac, GVU together with

both GL and Lloyds register.

• Attend in ship HASOP and bunkering HASOP.

• Attend in certification of components.

18 © Wärtsilä

Auxiliary room

24 May 2013 Viking Grace LNGPac 20 © Wärtsilä

• Heating media pumps

• Heat exchangers

• Motor starters

• Solenoid cabinets

• Liquid expansion tanks

• Nitrogen buffer tank

• Ventilation system

• Pipe arrangements

Wärtsilä has supplied the LNG tanks with tank room (cold box) also a

complete auxiliary room including;

Transportation from Teuva to harbor in Kaskö

24 May 2013 Viking Grace LNGPac 22 © Wärtsilä

Viking Grace

• Lifting of the LNGPac in to the dry dock

24 May 2013 Viking Grace LNGPac 23 © Wärtsilä

Finalised - DBAB205397 Doc.ID: Revision: Status: 24 / © Wärtsilä

Engine and gas valve arrangement

Safe Return to Port compliant:

4 main engines Wärtsilä 8L50DF, 2 sets in

each engine room

Inherently safe engine rooms:

Fully enclosed gas valve units, placed inside

the engine rooms

Conventional design

25 © Wärtsilä Greentech seminar, Copenhagen, 31th May 2011, Wärtsilä

Engine room,

gas safe area

GVU room,

Ex Zone 1

GVU

Fuel

Gas

Tank Air out

Air in *

Forced ventilation

Gas hazardous area

Gas safe area Single wall fuel gas pipe

Double wall fuel gas pipe

* to double wall fuel gas feed pipe annular space

LNG Bunker station

•Two bunker stations PS and SB aft

•Flexible hose connected with bunker

line by quick connect coupling with

spill prevention

•CCTV monitoring of the bunker

process

•ECR in wireless connection with the

bunker barge

26 © Wärtsilä

Viking Grace

Smokeless emissions from the exhaust gas

pipes and Compact Silencer system less than

50dB at 100 m.. Very .....very silent

More information about the vessel can be found

from link:

http://www.vikinggrace.com

24 May 2013 Viking Grace LNGPac 28 © Wärtsilä

Famous investor - Sir John Templeton

"Bull markets are born

on pessimism, grow on

skepticism, mature on

optimism, and die on

euphoria.

10 November 2010 Ship Power Technology / Sören Karlsson 29 © Wärtsilä

Thank you!

24 May 2013 Viking Grace LNGPac 30 © Wärtsilä