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Cecilia Andersson, Environmental Controller

Riga September 20, 2012

Shore side electricity at

Stena Line Scandinavia

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Ferry operations in

Stena Line Scandinavia

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Shore side electricity

Cold ironing

Shore-based power supply

Onshore power supply Electricity from land instead

of burning bunker fuel to

keep generators running.

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Stena Lines vessels in Scandinavia

Day ferry Ropax HSS

Seven vessels can get electricity from shore side.

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Low-voltage system

• 380 volts

• >10 cables

• Time-wasting to connect

• Poor ergonomics

• High operating cost

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High-voltage shore connection

(HVSC)

• 10500 volts

• One cable

• 5-15 minutes to connect

• High demands on electrical

safety

• Transformer on board

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STENA JUTLANDICA

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Important during planning phase

• Cooperation is necessary!

• Calculate on the energy balance to obtain right

dimension of the system.

• Various load over the year, most power needed during

the summer time for Stena ferries.

• Vessels often have 60 Hz & shore net 50 Hz, frequency

converter needed.

• Transformer is needed onboard to change the voltage.

• Decide if the cable shall be onbord or ashore.

• Involve staff onboard to make sure that the connection

is ergonomic feasible.

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Requirements before operation starts

Stena Line used IEC standard

IEC/PAS 60092-510:2009, Electrical installations in ships - High Voltage Shore Connection Systems

(HVSC-Systems).

Approval of elctrical installations

• Classification Society (ex Lloyds) approves the technical equipment installed on the ferry.

• Flag State (ex Swedish Transport Agency) approve that the technical equipment is used in a safe way.

• National Electrical Safety Board approve the technical equipment installed ashore.

Stena Lines responsibility

• Risk assessment, safety instructions, labelling.

• One day training course about high-voltage by supplier.

• Three days training course about high-voltage for electrical engineers arranged by Chalmers.

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Outside transformer room In control room

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Benefits

• Reduced emissions to air (CO2, NOx, SOX, PM).

• Reduced usage of fossil fuel.

• Reduced noise.

• Better working environment in engine room.

• Possibility to maintain auxiliary engines and

other systems during port stays.

• Aux engines are used less hours.

• Reduced cost per kWh.

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Environmental benefits

estimated year 2012

9 326 500 kWh

renewable energy

2 330 tons oil

7 475 tons carbon dioxide

4,6 tons sulphur dioxide

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THANK YOU!

cecilia.andersson@stenaline.com