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Gas fuelled vessels
Mika Ojutkangas 1 © Wärtsilä
Mika Ojutkangas
Wärtsilä Ship Power
m/s Viking Grace
Mika Ojutkangas 2 © Wärtsilä
Viking Line 2800 Pax Cruise Ferry
Wärtsilä integrated scope of supply:
Main Engines: 4 x Wärtsilä 8L50DF (DE)
Total output: 4 x 7600 kW
GVU in enclosure
Natural gas is the most environmentally
sound fuel today and with Wärtsilä's dual
fuel engines this ferry will be able to sail
without restrictions in SECA’s and NECA’s.
LNGPac 200 2 x 200 m3
Integrated tank – and aux. rooms
Bunkering system, Safety systems
Cold recovery for HVAC
The cold recovery system brings
operational savings and overall increased
vessel efficiency.
Mika Ojutkangas 3 © Wärtsilä
2x 200 cbm LNGPacs on aft deck
Mika Ojutkangas 4 © Wärtsilä
Viking Line 2800 Pax Cruise Ferry
Mika Ojutkangas 5 © Wärtsilä
6 © Wärtsilä
Gas fuelled
DF-engine
Bunkering
stations
Gas valve
units
Evaporator
rooms
(emergency)
Venting mast
LNG tanks
Compact
Silencer
System
2x FP
Propeller
Shaft lines,
Seals &
Bearings
Bow
Thrusters
Stern
Thruster
Mika Ojutkangas
Wärtsilä integrated scope of supply:
FPP (Stainless Steel) 2 x 10 500 kW
Shaft lines, Seals & Bearings Bow
Thruster 2 x 2 300 kW
Stern Thruster 1 x 1 500 kW
The propellers are designed with the lowest
possible pressure impulses for superb
vibration control.
Viking Line 2800 Pax Cruise Ferry
Mika Ojutkangas 7 © Wärtsilä
Compact Silencer System (CSS)
Silent operation is important for passenger
comfort, but also for the sailing route;
through the islands of the Turku and
Stockholm archipelagos.
Bunkering while loading/unloading passengers and cargo
Mika Ojutkangas 8 © Wärtsilä
The Engines
Mika Ojutkangas 9 © Wärtsilä
DF Engine - Operating modes
* * * * * * * *
* * * * * *
* * * *
* * *
* *
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.
Mika Ojutkangas 10 © Wärtsilä
Fuel Injection systems - Pilot fuel system
Pilot solenoid valve
Pilot needle
Main needle
For optimum pilot and diesel fuel distribution
Mika Ojutkangas 11 © Wärtsilä
Immediate changeover from GAS to MDO on 100% load
Speed
Load
Receiver pressure
Gas pressure
Pilot fuel pressure
Diesel actuator
© Wärtsilä
Speed
Load
Receiver pressure
Gas pressure
Pilot fuel pressure
Diesel actuator
Transfer (MDO to GAS) on 80% load
© Wärtsilä
Fuel System
Pilot fuel common
rail 900bar
Main fuel
injection pipe
Main fuel
injection pump
Pilot fuel quill pipe
Main fuel quill pipe
Twin nozzle
injection valve
Inlet valve
Gas manifold
Gas bellow
Fine filter
Gas valve
Gas nozzle
Gas valve electrical connection
Injection valve electrical connection
Mika Ojutkangas 14 © Wärtsilä
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%
-99%
Mika Ojutkangas 15 © Wärtsilä
Doc.ID: Revision: Status: 46 / © Wärtsilä
INTERNAL USE ONLY
Efficiency
Mika Ojutkangas 17
Efficiency?
If the diesel process works better in cars,
why use the Otto process at all?
Engine (Tier II) SFOC (with pumps, 5% tol.)
46C, Tier II 176 g/kWh
46F 173 g/kWh
50DF, diesel 189 g/kWh
50DF, gas 7300 kJ/kWh ?
Source: 46, 46F, 50DF Marine Project Guides
Mika Ojutkangas 18 © Wärtsilä
Efficiency? How to compare?
The heating value for diesel is 42 700 kJ/kg
in our case.
Case 1: 46C:
176 g / kWh * 42 700 kJ / 1000 g =
176 * 42700 g kJ
1000 g kWh
7515,2 kJ/kWh
=
Mika Ojutkangas 19 © Wärtsilä
Efficiency?
Engine (Tier II) SFOC (with pumps, 5% tol.)
46C 7515 kJ/kWh
46F 7387 kJ/kWh
50DF, diesel 8070 kJ/kWh
50DF, gas 7300 kJ/kWh
Mika Ojutkangas 20 © Wärtsilä
Mika Ojutkangas 21 © Wärtsilä
System basic principle
Mika Ojutkangas 22
<10 bar system
LNGPac production and transportation
© Wärtsilä
© Wärtsilä
Mika Ojutkangas 25 © Wärtsilä
Mika Ojutkangas 26 © Wärtsilä
System basic principle - GVU
GVU is a module between the
LNG storrage system and the
engine
A gas valve unit is required
for each engine
The Gas Valve Unit – GVU
comprise of filters and valves,
flow meter is optional
The main functions of GVU
Pressure regulation
Leak test – sequence
Inerting and venting
© Wärtsilä
Gas Valve Unit (GVU)
GVU
Fue
l
Gas
Tan
k
Engine charge air pressure varies with load
Gas admission valve can only operate with a moderate
pressure difference between the gas pressure and
the charge air pressure
The gas valve unit regulates the gas pressure with the
charge air pressure
The Gas Valve Unit (GVU) has also important safety related functions
© Wärtsilä
Installation with GVU enclosure
Wärtsilä 34DF / 50DF GVU Wärtsilä 20DF GVU
© Wärtsilä
Some references
Mika Ojutkangas 30 © Wärtsilä
Dual-Fuel applications - References
6 segments 210 installations > 7’000’000 running hours
Power
Plants
DF Power Plant
57 installations
225 engines
Online
since1997
Merchant
LNGC
• 121 vessels
• 481 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 5 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-propulsion
• DF main and
auxiliary
engines
Others
TUG
• 2 vessel
• 2 engines each
• Mechanical
drive
FPSO
• 1 vessel
• 6*18V50DF
Mika Ojutkangas 31 © Wärtsilä
Coral Energy, 15’600cbm LNGC
Mika Ojutkangas 32 © Wärtsilä
Pictures: A Veder
Yard: Neptune Werft
Owner: Anthony Veder
Delivery: Jan 2013
Amount of vessels: 1
Wärtsilä scope of supply:
• 1*W8L50DF main engine (8L50DF, 7’800kW – 27,3t/24h GAS +1% pilot or 35,6t/24h MDO)
• Gear (two stage PTO)
• CPP
• 2*W6L20DF Genset (6L20DF, 1’056kW – 4,3t/24h GAS +1% pilot or 5,2t/24h MDO)
Viking Grace, RoPax cruise vessel
Mika Ojutkangas 33 © Wärtsilä
Pictures: E Laine & M Ojutkangas
Yard: STX Turku, Finland
Owner: Viking Line
Delivery: Jan 2013
Amount of vessels: 1
Wärtsilä scope of supply:
• 4*W8L50DF (8L50DF, 7’800kW – 27,3t/24h GAS +1% pilot or 35,6t/24h MDO)
• LNGpac
• Gas handling system
• Propulsion
•Compact Silencer System
Border Guard vessel
Mika Ojutkangas 34 © Wärtsilä
Picture: Finnish Border Guard
Yard: STX Rauma, Finland
Owner: Finnish Border Guard
Delivery: November 2013
Amount of vessels: 1
Wärtsilä scope of supply:
• Wärtsilä 34DF and
20DF generating sets,
in both in-line and
V-engine configurations.
MS Econuri, Guide ship
Mika Ojutkangas 35 © Wärtsilä
Pictures: Samsung & IPA
Yard: Samsung, South Korea
Owner: Incheon Port Authority
Delivery: Feb – 2013
Amount of vessels: 1
Wärtsilä scope of supply:
• 1*W9L20DF (9L20DF, 1’056kW – 6,5t/24h GAS +1% pilot or 7,8t/24h MDO)
DF Tug, 6’500bhp
Mika Ojutkangas 36 © Wärtsilä
Pictures: CNOOC
Yard: Huangpu SY, China
Owner: CNOOC
Delivery: Q3 – 2013
Amount of vessels: 2
Wärtsilä scope of supply:
• 2*W6L34DF (main engines) (6L34DF, 2’610kW – 9,6t/24h GAS +1% pilot or 12,1t/24h MDO)
Harvey Gulf PSV, EPA compliant
Mika Ojutkangas 37 © Wärtsilä
Pictures: Harvey Gulf
Yard: Trinity offshore
Owner: Harvey Gulf International Marine
Delivery: 2013
Amount of vessels: 5
Wärtsilä scope of supply:
• 3*W6L34DF (6L34DF, 2’610kW – 9,6t/24h GAS +1% pilot or 12,1t/24h MDO)
• El & Automation
• Gas handling system
• LNGpac
• Propulsion
Petrobras 63 – 102 MW FPSO
Yards: Cosco Dalian, China
Rio Grande de Sul, Brazil
Owner: QUIP/BWO, 2016
Petrobras, 2016
Delivery: 2013
Amount of vessels: 1
Wärtsilä Scope of Supply:
• 6 x W18V50DF (18V50DF, 17’550kW – 61,5t/24h GAS +1% pilot or 79,6t/24h MDO)
• Power Management System
Mika Ojutkangas 38 © Wärtsilä
Pictures: Petrobras, QUIP, Wärtsilä
LF7-2 – Fixed drilling Platform
Mika Ojutkangas 39 © Wärtsilä
Yard: CNOOC Qingdao fabrication yard
Owner: Newfield 49%, CNOOC 51%
Delivery: 2013
Amount of vessels: 5
Wärtsilä scope of supply:
• 2*W9L34DF (9L34DF, 3’915kW – 14,4t/24h GAS +1% pilot or 18,1t/24h MDO)
• 2*9L32
• Gas reformer
• Oil & gas system
Mika Ojutkangas 40 © Wärtsilä
www.wartsila.com