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WPCI - OPS - Glossary

Onshore Power Supply

Glossary

Auxiliary engine 
An engine not used for propulsion but for other purposes like power generation.

CARB 
California Air Resources Board.

CO
Carbon dioxide (a greenhouse gas).

Cold Ironing 
See onshore power supply.

Container ship 
A ship used to transport goods that are distributed in containers.

Cruise ship 
A ship used to transport passengers for recreational (holiday) purposes.

Diesel electric propulsion 
Diesel engines that are used for electricity production. This setup can be used for electric propulsion (indirectly via electric motors) and for powering other electrical equipment and appliances.

EU
European Union.

Ferry 
A ship used to transport a combination of passengers and vehicles, normally between two or more fixed ports.

Frequency converter 
A device used to change AC frequency to the required level. Transformer A static electric device used to change the voltage to a required level.

Fuel boiler 
Installation to heat fuel to a liquid state.

HFO
Heavy Fuel Oil (fuel type).
 
High-voltage OPS 
An OPS system running on high-voltage electricity, generally ranging from 6 kV to 11 kV.

Hotelling 
See onshore power supply.

IAPH 
International Association of Ports and Harbors.

IEEE 
Institute of Electrical and Electronics Engineers.

IEC 
International Electrotechnical Commission.

IMO 
International Maritime Organization.

ISO 
International Organization for Standardization.

kWh 
A unit of energy given by the power consumption in watts multiplied by the duration of consumption in hours.

LNG         
Liquefied Natural Gas (fuel type).
 
Low-voltage OPS 
An OPS system running on low-voltage electricity, generally ranging from 400 V to 690 V.

Main engine 
The ship’s engine that is used for propulsion. While underway, it may be used to produce electricity via a propeller shaft generator.

MDO
Marine Diesel Oil (fuel type).

MGO
Marine Gas Oil (fuel type).

NOx 
Nitrogen oxides (air pollutants).

Onshore power supply (OPS) 
A system to provide electricity from the local grid to ships to meet their power demand.

Onshore power system 
See onshore power supply.

PM 
Particulate matter (an air pollutant).

RoRo ship 
A Roll-on/Roll-off ship used to transport trucks and trailers.

SCR 
Selective catalytic reduction (a post-combustion emission reduction technique to reduce NOx emissions).

Shoreside electricity
See onshore power supply.

SOx 
Sulphur oxides (air pollutants).

Synchronization 
The process by which a ship gradually switches from power supplied by onboard generators to an onshore power supply. Synchronization makes continuous power supply possible during the switchover.

Tanker 
A ship used to transport liquids in bulk, for example heavy oil or edible oils.

WHO 
World Health Organization.

WPCI 
World Ports Climate Initiative.