Harnessing Available Fuel in the Most Efficient Way for Greener Powering Solution

“Harnessing Available Fuel in the Most Efficient Way for Greener Powering

Solution”

11th Annual FPSO Congress

By

Stig Bøtker

Sales Director Offshore

Ship Power

Agenda

� Wärtsilä in brief

� Setting the scene

� Duel fuel technology and its advantages

� Power plant solutions for FPSOs

� References & operational experience

� Summary

This is Wärtsilä

SHIPPOWER

POWERPLANTS

SERVICES

18 000 employees in 110 Countries

Net sales 2009 5.3 billion EuroOperating results 11.2 %

Merchant OffshoreCruise

and FerryNavy

Special

Vessels

This is Wärtsilä – Ship Power

Every third ship is powered by Wärtsilä

Specials

Power

DistributionPower

DrivesAutomation

Propulsion

Engines

This is Wärtsilä – Solution Provider

Ship Design

Setting the Scene – Power Plant Fundamentals

� Fuel flexibility

� Energy Efficiency

� Operational flexibility

� Low environmental impact

� Tried and tested concept

� Competitive cost

� Capex and Opex

Setting the Scene – Fuel Availability

� Fuel type and availability will depend on the reservoir characteristics and may vary with the extent of the reservoir depletion

� Type of fuel available from the reservoir may vary from gas,

light crude oil to heavy crude oil

� Alternative to reservoir fuel, the fuel may be transported from

shore. This is in general an expensive solution and will due to

the transportation increase the carbon footprint.

Duel Fuel/Multiple fuel power generation facility with low emission and high efficiency would solve many of the

fundamentals for an offshore power plant

Duel Fuel/Gas Engine Technologies

Gas-diesel (GD) engines:

• Runs on various gas / diesel mixtures or alternatively on diesel.

• Combustion of gas, diesel and air mixture in Diesel cycle.

• High-pressure gas injection.

Dual-fuel (DF) engines:

• Runs on gas with 1% diesel (gas mode) or alternatively on diesel (diesel mode).

• Combustion of gas and air mixture in Otto cycle, triggered by pilot diesel injection (gas mode), or alternatively combustion of diesel and air mixture in Diesel cycle (diesel mode).

• Low-pressure gas admission.

Spark-ignition gas (SG) engines:

• Runs only on gas.

• Combustion of gas and air mixture in Otto cycle, triggered by spark plug ignition.

• Low-pressure gas admission.

‘87 … ‘92 ‘93 ‘94 ‘95 ‘96 ‘97 ‘98 ‘99 ‘00 ‘01 ‘02 ‘03 ‘04 ‘05 ‘06 ‘07 ‘08 ‘09 ‘10 ‘11 ‘12

Dual-fuel (DF) engines – Multiple fuel engines

Spark-ignition gas (SG) engines

Gas-diesel (GD) engines

Operating Modes for DF Technology

� Gas mode

� Natural gas + MDO pilot

� Automatic and instant trip to diesel operation in alarm/emergency situation

� Transfer to diesel operation at any load on request

� Diesel mode

� MDO/HFO/crude + MDO pilot

� Operated as an ordinary diesel engine

� Transfer to gas operation at any load below 80%

� Pilot fuel injection in operation also during diesel mode operation

� Transfer between modes without power interruption

Gas mode Diesel mode

10%

80%

100%

Engine

Load

Typical plant efficiency at full output

Coal Fired Steam Plant

Small Size Gas Turbine

Big Size Gas Turbine

Big Size DF Engine

42%

30%

37 %

48%

Typical shaft efficiencies - simple cycle prime movers –No de-rating due to ambient temperature

Duel fuel Engines Efficiency

� The available power for a

duel fuel reciprocating

engine is constant for an

ambient temperature of less

than approximately 45

degrees

� The available power for a

gas turbo generator is

highly depended on the

ambient temperature

Duel Fuel Engines Efficiency

� The efficiency of the DF engine depend less on the power level compared to a gas turbine generator

� The DF engine are especially more efficient then the gas turbines for lower load levels

Temperature [ºC] Output (% of the MCR output in 15ºC, i.e. ISO conditions)

SFOC[g/kWhe]

SFOC[g/kWeh]

Max. power limit

Wärtsilä DF genset

Gas turbine genset

CO2 emissions

Coal Fired Steam Plant Fuel: Coal

Small Size Gas Turbine Fuel:Gas

Big Size Gas Engine Fuel:Gas

800

670

430

Typical CO2 emissions in g/kWh (shaft) - simple cycle prime movers –No de-rating due to ambient temperature

545

Big Size Gas Turbine Fuel:Gas

Dual Fuel Reciprocating Engine Characteristics

� High Efficiency over the full range of ambient temperatures and load levels

� Low emissions due to the high efficiency, clean fuel and a lean burn combustion

� Full fuel flexibility “you pump it – we burn it

With all the advantages why has the solution not been able to penetrate the market ?

34DF

50DF

20DF

0 5 10 15

20V34DF

12V34DF

9L34DF

6L34DF

16V34DF

18V50DF 17.55 MW

16V50DF

12V50DF

9L50DF

8L50DF

6L50DF

9L20DF

8L20DF

6L20DF 1.0 MW

Dual-Fuel Engine Portfolio

Power Plant Solutions for Offshore Oil & Gas

� Module solutions

� Module solutions will typically comprises of 2 to 4 engines

� Container solutions

� The container will typically comprises of 1 to 3 engines

� Hull solutions

� The engines will be installed directly in the hull of the

vessel

Module & Container Solutions

Full equipped stand alone container with one engine

Full equipped stand alone module with four engines

Offshore Power Plant for Brazil

� Field characterized by limited availability of gas and high power requirement due to the use of multiphase pumps

� 6 x18V50DF in 3 modules, total power 102 MW

� Running on tri-fuel: treated crude, MDO and treated well gas

� Delivery July 2011

Installation in Hull

� Power plant can be housed below decks – frees up

topside space

� Conventional “engine room design”

� No need for large suction air ducts or discharge

� Low radiated heat in engine room

� Noise level according to IMO

Power Plant For Offshore Oil and Gas applications

� Dual fuel reciprocating power plants solutions are available for offshore oil & Gas applications

� Considering the advance in electrical motors and VSD a central power plant is able to power an entire offshore production units including compression and pumping requirement

� Reciprocating power plants are especial competitive for power requirement up to 70 MW

� Reciprocating power plants are also competitive for large power requirement if gas only is available for a limited time of the fields life time

Dual-Fuel Engines - References

Dual Fuel sold or running

Power plant 28 installations84 engines>640’000 running hours

LNG carriers62 installations230 engines> 1’500’000 running hours

OSV - FPSO8 installations22 engines>300’000 running hours

Operational Experience with Duel Fuel Engines

� The Wärtsilä DF engines have now been in commercial operation on LNG carriers for > 5 years. Experience from > 1’500’000 engine running hours have been collected

� The DF engines has met or exceeded the requirements in terms of:Reliability, Functionality and Engine performance

� Efficiency > 48% in gas mode

� Fuel back up operation instantly

� Low emissions

� Meet predicted overhaul intervals

� Because of the excellent operational experience Wartsila is willing to sign long term service & operational contracts

� The client will have a low and predictable OPEX for the engines

Operational Experience with Duel Fuel Engines

� Extensive inspection was performed after 18000 running hours to verify the condition of the engines

� Very low wear rates

� Honing marks visible in cylinder liner after 18.000 hours of operation

� No piston ring wear (not measurable)

� Small amount of deposits

� Light tendency of discolor on liner surface

Summary

� A power Plant solution for offshore oil & gas production based on dual fuel reciprocating engines offer :

� Fuel flexibility Yes

� Energy Efficiency Yes

� Operational flexibility Yes

� Low environmental impact Yes

� Tried and tested concept Yes

� Competitive cost Test it next time and you will

be positively surprised

Thank you for your attention