Retrofit Moteur Diesel Wärtsilä en Dual fuel · Dual-fuel engine characteristics • High...

Retrofit Moteur Diesel Wärtsilä en Dual fuel

Colloque optimisation énergétique des navires de commerce. ENSM le 17 et 18 Janvier

2012 Marseille

Présenté par J-M Henry Resp. com. Wärtsilä France

© Wärtsilä Jean-Michel Henry ENSM Marseille Jan 17 & 18th 2012

Contents

DF Technology

The DF advantage

The „Tarbit“ project CONVERSION

(From Wärtsilä 46 To Wärtsilä 50DF Engine)


Wärtsilä Dual-Fuel Engine Portfolio Wärtsilä Dual-Fuel Engine Portfolio

0 5 10 15

34DF

20V34DF 9.0 MW

12V34DF 5.4 MW

9L34DF 4.0 MW

6L34DF 2.7 MW

16V34DF 7.2 MW

18V50DF 17.55 MW

16V50DF 15.6 MW

12V50DF 11.7 MW

9L50DF 8.8 MW

8L50DF 7.8 MW

6L50DF 5.85 MW 50DF Higher output for 60Hz / Main engines

20DF

9L20DF 1.6 MW

8L20DF 1.4 MW

6L20DF 1.0 MW


Dual-fuel engine characteristics • High efficiency • Low gas pressure • Low emissions, due to:

High efficiency Clean fuel Lean burn combustion

• Fuel flexibility Gas LFO (DF) Bio Fuel HFO (TF)

• Double wall gas piping The engine room is a gas

safe area

• Three engine models Wärtsilä 20DF Wärtsilä 34DF Wärtsilä 50DF

34DF

50DF

20DF


•* •* •* •* •* •* •* •*

•* •* •* •* •* •* •* •* •* •* •* •* •*

•* •*

Intake of air and gas

Compression of air and gas

Ignition by pilot diesel fuel

Otto principle

Low-pressure gas admission

Pilot diesel injection

Gas mode: •Ex. •In. •Ex. •In. •Ex. •In.

Intake of air

Compression of air

Injection of diesel fuel

Diesel principle

Diesel injection

Diesel mode: Ex. In. Ex. In. Ex. In.

Dual-fuel engine - operating principle


Engine systems - Control system

• •Operating •window

•The

rmal

effi

cien

cy [

% ]

•NO

x em

issi

ons

[ g /

kW h

]

•BM

EP

[ bar

]

•Air / Fuel ratio

•Knocking

•Mis

firin

g

•Optimum performance •for all cylinders


Fuel system in cylinder head – double walled gas piping Components

•Pilot fuel common rail 900bar •Main fuel injection pipe •Main fuel injection pump

•Main fuel quill pipe •Pilot fuel quill pipe

•Twin nozzle injection valve

•Inlet valve

•Gas manifold •Gas bellows •Fine filter •Gas valve •Gas nozzle

•Gas valve electrical connection •Injection valve electrical connection


To GVUProduct evaporator

PBU

LNG

Gas

Anti-freeze heating media

LT-water

LNG

Gas

Anti-freeze heating media

LT-water

LT- water heat exchanger

Bunkering station

Cold Box

LNGPac Simplified P&ID


Contents

DF Technology

The DF advantage

The „Tarbit“ project CONVERSION

(From Wärtsilä46 To Wärtsilä 50DF Engine)


Dual-Fuel advantages

Time

Engine speed DF change to

liquid mode

DF & SG Normal load application

DF & SG Instant load application DF

Big instant load application (trips to liquid)

SG Instant, abnormal high load application

Main advantages of the Dual-Fuel 4-stroke engine compared to SG (spark ignited): • Simple mechanical propulsion application

– Full power available in both fuel operation modes • Load application capability

– Load application capability is equal between dual-fuel and SG – Dual-fuel can change to liquid fuel in case instant abnormal high load / unload

requirement (no shut-down) – Changeover point can be programmed to suit application

Improves safety


Natural Gas As Marine Fuel

CO2

NOx

SOx

Particulates

Dual-Fuel engine in gas mode

Diesel engine

0

10

20

30

40

50

60

70

80

90

100

Emission values [%]

-25%

-85%

-100%

-100%


0

4

6

10

12

16

14

8

2

18

250 500 1000 1500 2000 0

NO

x [g

/kW

h]

Rated engine speed [rpm]

50DF Engine (in diesel mode)

Environmental challenge

IMO NOx emissions regulations

IMO Tier I - New ships 2000 IMO Tier II - New ships 2011 IMO Tier III - New ships 2016 in designated areas

50DF Engine (in gas mode)


Emission Control Areas

existing ECAs: Baltic Sea, North Sea

planned ECAs: Coasts of USA, Hawaii and Canada

discussed ECAs: Coasts of Mexico, Coasts of Alaska and Great Lakes, Singapore, Hong Kong, Korea, Australia, Black Sea, Mediterranean Sea (2014), Tokyo Bay (in 2015)

Most used trading routes

Proliferation of ECA areas is expected in the next future


The DF vessel concept

LNG MDO

The DF engines will only use gas fuel inside ECA areas Safety and reliability of the traditional diesel engine remain

No SOx Scrubber, No sulphur in fuel

No SCR unit, Tier III compliant

MDO as backup fuel


The DF vessel concept, outside ECA

LNG MDO/HFO

The DF engines can be run on HFO outside ECA areas

No SOx Scrubber

No SCR unit

Optional HFO flexibility

when allowed


Contents

DF Technology

The DF advantage

The „Tarbit“ project

(From Wärtsilä 46 To Wärtsilä 50DF Engine)


TARBIT PROJECT

DWT 24783 ton

GT 17757 ton

Displacement 33788 ton

Length p.p. 166.99 m

Length o.a. 177.02 m

Keel To Mast Height 44.85 m

Draught 9.7 m

Breadth Extreme 26.3 m

Breadth Moulded 26 m

Speed 16 kn

Vessel delivery date 17.09.2007

Vessel typology 25'000 dwt Chemical tanker

Owner Tarbit Shipping AB

Ship Builder Shanghai Edward Shipbuilding Co Ltd

Flag Sweden

Class Germanischer Lloyd

20 May 2011 © Wärtsilä Jean-Michel Henry ENSM Marseille Jan 17 & 18th 2012

Main facts

Vessel owned by Tarbit Shipping AB (Sweden)

Operated under time charterer by Statoil

Sailing in Norwegian waters

Conversion partially financed by Norwegian “Næringslivets Hovedorganisasjon” (Confederation of Norwegian Business and Industry)

Built by Edward Shipbuilding Co Ltd (Hudong-Zhong JV)

Designed by Wärtsilä Ship Design (former Skipskonsulent )


Background: main engine conversion

before 2 x W6L46B

5850 kW each

WÄRTSILÄ 8L20 1200 kW

CPP

CPP

PTO 1500 kW

PTO 1500 kW

WÄRTSILÄ 8L20 1200 kW

after 2 x W6L50DF 5700 kW each


Background: scope of conversion

Scope of supply:

Ship Design Engine conversion LNGPac system (2 x 500m3) Gas supply units Torque meter for power measurement Bunkering system Gas piping (single and double walled) Exhaust system Fire-fighting upgrade Gas detection system Electrical system Additional NOx measurement during sea trial DF and LNGPac training for personnel


Today!


LNGPac production and transportation


LNGPac onboard installation


LNGPac onboard installation

LNGPac

“Cold-box”

Bunkering stations

Vent masts

Drip trays


Bunkering station and drip tray

Bunkering station (enclosed), under

construction

Drip tray


Bunkering station and drip tray

Drip tray, under construction


Single-wall piping on weather deck

1. Single-wall piping, thermally insulated, installed on the weather deck.

2. Work finalized with damage protection


Single and Double-wall pipe

Inner pipe

Outer pipe

Annular space equipped with mechanical under pressure ventilation (capacity of at least 30 air

changes per hour).

Double wall pipe Single wall pipe

Pipe on open-air deck thermally insulated


Engine up-grade

LNG product tanker


DF conversion – Parts which will be exchanged

Turbocharge

rs modified

for DF

operation

Camshaft

pieces for

DF Miller

valve timing

Cylinder

heads

Pistons &

piston

rings

Cylinder liner

& anti-

polishing ring

Connecting

rods

(upper part)

Dual-

needle

injection

valve

Control

system

UNIC


DF conversion – Components added on the engine

Gas rail pipe

Gas admission

valves

Exhaust gas

waste gate

Pilot fuel system:

- Pilot fuel oil filter

- Common rail piping

- Pilot fuel oil pump


Engine conversion

Double-walled gas manifold

Exhaust gas manifold

Gas-admission valves


Torque meter placement in mechanical drive (DF) installation


Gas Valve Unit

50DF Gas Valve Unit horizontally oriented


20.10.2011 – First LNG Bunkering


Dual-Fuel applications - References

4 segments 150 installations > 3’000’000 running hours

Power Plants

DF Power Plant 49 installations 155 engines Online since1997

Merchant

LNGC • 89 vessels • 353 engines • 1’000’000 rh Conversion • 1 Chem. Tanker • 2 engines conv. • Complete gas

train • Complete design

Offshore

PSVs/FPSOs • 17 vessels • 87 engines • Online from 1994 New orders! • Harvey Gulf: the

first 3 LNG-PSV to be operated in the Gulf of Mexico!

Cruise and Ferry

LNG ferries • 1+1 vessels • 4 engines per

vessels • Complete gas

train • 2800 passengers • In service in 2013

Navy

Costal Patrol • Coming…


Thank you!


Retrofit Moteur Diesel Wärtsilä en Dual fuel · Dual-fuel engine characteristics • High...

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