Shore power

Last updated

Shore power or shore supply is the provision of shoreside electrical power to a ship at berth while its main and auxiliary engines are shut down. [1] While the term denotes shore as opposed to off-shore, it is sometimes applied to aircraft or land-based vehicles (such as campers, heavy trucks with sleeping compartments and tour buses), which may plug into grid power when parked for idle reduction.

Contents

The source for land-based power may be grid power from an electric utility company, but also possibly an external remote generator. These generators may be powered by diesel or renewable energy sources such as wind or solar.

Shore power saves consumption of fuel that would otherwise be used to power vessels while in port, and eliminates the air pollution associated with consumption of that fuel. A port city may have anti-idling laws that require ships to use shore power. Use of shore power may facilitate maintenance of the ship's engines and generators, and reduces noise.

Oceangoing ships

"Cold ironing" is specifically a shipping industry term that came into use when all ships had coal-fired engines. When a ship tied up at port, there was no need to continue to feed the fire and the iron engines would cool down, eventually going completely cold – hence the term "cold ironing". Commercial ships can use shore-supplied power for services such as cargo handling, pumping, ventilation and lighting while in port, they need not run their own diesel engines, reducing air pollution emissions. Examples are ferries and cruise ships for hotel electric power, and a salmon feeder ship uses shore power while at the salmon farm. [2]

Small craft

Small boats using shore power Small boats using shore power.jpg
Small boats using shore power

On small private boats, electrical power supply on board is usually provided by 12 or 24 volt DC batteries [3] whilst at sea unless the vessel has a generator. When the vessel is berthed in a marina or harbourside, mains electricity is often offered via a shore power connection. [4] This allows the vessel to use a battery charger to recharge batteries and also to run mains-powered AC devices such as TV, washing machine, cooking appliances and air conditioning. The power is usually provided from a power pedestal on the dock which is often metered or has a card payment system if electricity is not provided free of charge. The vessel connects to the supply using a suitable shore power cable. [5]

Trucks

Shore power, as it relates to the trucking industry, is commonly referred to as "Truck Stop Electrification" (TSE). The US Environmental Protection Agency estimates that trucks plugging in versus idling on diesel fuel could save as much as $3240 annually. [6] As of 2009 there were 138 truck stops [7] in the USA that offer on-board systems (also called Shore power) or off-board systems (also called single system electrification) for an hourly fee. Auxiliary power units offer another alternative to both idling and shore power for trucks.

Aircraft

A Rossiya Airlines airplane connected to its ground power unit at Phuket International Airport. 201701 EI-XLD with GPU supply.jpg
A Rossiya Airlines airplane connected to its ground power unit at Phuket International Airport.

Similar to shore power for ships, a ground power unit (GPU) may be used to supply electric power for an aircraft on the ground, to sustain interior lighting, ventilation and other requirements before starting of the main engines or the aircraft auxiliary power unit (APU). It is also used by aircraft with APUs if the airport authority does not permit the usage of APUs at its docks or if the carrier wishes to save on the use of jet fuel (which APUs use). This may be a self-contained engine-generator set, or it may convert commercial power to the voltage and frequency needed for the aircraft (for example 115 V 400 Hz).

Trains and buses

Shore power may be a grid connection for passenger trains laying over between runs. [8] Similarly buses may be connected when not in use.[ citation needed ]

See also

Related Research Articles

<span class="mw-page-title-main">Electric boat</span> Type of watercraft

An electric boat is a powered watercraft driven by electric motors, which are powered by either on-board battery packs, solar panels or generators.

<span class="mw-page-title-main">Gas turbine</span> Type of internal and continuous combustion engine

A gas turbine or gas turbine engine, by its old name internal combustion turbine, is a type of continuous flow internal combustion engine. The main parts common to all gas turbine engines form the power-producing part and are, in the direction of flow:

<span class="mw-page-title-main">Auxiliary power unit</span> Alternative vehicle power source

An auxiliary power unit (APU) is a device on a vehicle that provides energy for functions other than propulsion. They are commonly found on large aircraft and naval ships as well as some large land vehicles. Aircraft APUs generally produce 115 V AC voltage at 400 Hz, to run the electrical systems of the aircraft; others can produce 28 V DC voltage. APUs can provide power through single or three-phase systems.

<span class="mw-page-title-main">Hybrid vehicle</span> Vehicle using two or more power sources

A hybrid vehicle is one that uses two or more distinct types of power, such as submarines that use diesel when surfaced and batteries when submerged. Other means to store energy include pressurized fluid in hydraulic hybrids.

<span class="mw-page-title-main">Diesel locomotive</span> Locomotive powered by a diesel engine

A diesel locomotive is a type of railway locomotive in which the power source is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving wheels. The most common are diesel-electric locomotives and diesel-hydraulic.

<span class="mw-page-title-main">Icebreaker</span> Ship that is able to navigate through ice-covered waters

An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-breaking ships, it may also refer to smaller vessels, such as the icebreaking boats that were once used on the canals of the United Kingdom.

<span class="mw-page-title-main">Engine room</span> Space where the propulsion machinery is installed aboard a ship

On a ship, the engine room (ER) is the compartment where the machinery for marine propulsion is located. The engine room is generally the largest physical compartment of the machinery space. It houses the vessel's prime mover, usually some variations of a heat engine. On some ships, there may be more than one engine room, such as forward and aft, or port or starboard engine rooms, or may be simply numbered. To increase a vessel's safety and chances of surviving damage, the machinery necessary for the ship's operation may be segregated into various spaces.

Mild hybrids (MHEV) are generally cars with an internal combustion engine (ICE) equipped with a negligibly bigger electric combined motor and generator in a parallel hybrid configuration allowing the engine to be turned off whenever the car is coasting, braking, or stopped, and then quickly restarted once power is again required. Mild hybrids may employ regenerative braking and some level of power assist to the internal combustion engine, but mild hybrids do not have an electric-only mode of propulsion.

Hybrid vehicle drivetrains transmit power to the driving wheels for hybrid vehicles. A hybrid vehicle has multiple forms of motive power.

<span class="mw-page-title-main">Marine propulsion</span> Systems for generating thrust for ships and boats on water

Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats, most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller, or less frequently, in pump-jets, an impeller. Marine engineering is the discipline concerned with the engineering design process of marine propulsion systems.

<span class="mw-page-title-main">Idle reduction</span> Attempts to reduce idling of vehicle engines

Idle reduction describes technologies and practices that minimize the amount of time drivers idle their engines. Avoiding idling time has a multitude of benefits including: savings in fuel and maintenance costs, extending vehicle life, and reducing damaging emissions. An idling engine consumes only enough power to keep itself and its accessories running, therefore, producing no usable power to the drive train.

<span class="mw-page-title-main">ISE Corporation</span> American hybrid electric powertrain system manufacturer

ISE Corporation was a manufacturer and integrator of heavy-duty hybrid electric powertrain systems for transit bus and truck use, based in San Diego and later Poway, California. ISE was founded in 1995 and filed for bankruptcy in 2010, shortly after raising $20 million in its initial public offering on the Toronto Stock Exchange.

<span class="mw-page-title-main">Cold ironing</span>

Cold ironing, or shore connection, shore-to-ship power (SSP) or alternative maritime power (AMP), is the process of providing shoreside electrical power to a ship at berth while its main and auxiliary engines are turned off. Cold ironing permits emergency equipment, refrigeration, cooling, heating, lighting and other equipment to receive continuous electrical power while the ship loads or unloads its cargo. Shorepower is a general term to describe supply of electric power to ships, small craft, aircraft and road vehicles while stationary.

Voltec, formerly known as E-Flex, is a General Motors powertrain released in November 2010. The Voltec architecture is primarily a plug-in capable, battery-dominant electric vehicle with additional fossil fuel powered series and parallel hybrid capabilities.

<span class="mw-page-title-main">Range extender</span> Fuel-based auxiliary power unit that extends the range of a battery electric vehicle

A range extender is a fuel-based auxiliary power unit (APU) that extends the range of a battery electric vehicle by driving an electric generator that charges the vehicle's battery. This arrangement is known as a series hybrid drivetrain. The most commonly used range extenders are internal combustion engines, but fuel-cells or other engine types can be used.

IdleAir, a division of Convoy Solutions LLC, is a company that provides in-cab services to truckers via centralized systems at truck stops around the United States. IdleAir's service, the patented Advanced Travel Center electrification (ATE), was more complex and more expensive than traditional truck stop electrification (TSE) systems which are aimed at idle reduction reducing the amount of fuel consumed by trucks while they idle during rests.

<span class="mw-page-title-main">Aircraft engine starting</span> Overview article on aircraft engine starting methods

Many variations of aircraft engine starting have been used since the Wright brothers made their first powered flight in 1903. The methods used have been designed for weight saving, simplicity of operation and reliability. Early piston engines were started by hand. Geared hand starting, electrical and cartridge-operated systems for larger engines were developed between the First and Second World Wars.

<span class="mw-page-title-main">Internal combustion engine</span> Engine in which the combustion of a fuel occurs with an oxidizer in a combustion chamber

An internal combustion engine is a heat engine in which the combustion of a fuel occurs with an oxidizer in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal combustion engine, the expansion of the high-temperature and high-pressure gases produced by combustion applies direct force to some component of the engine. The force is typically applied to pistons, turbine blades, a rotor, or a nozzle. This force moves the component over a distance, transforming chemical energy into kinetic energy which is used to propel, move or power whatever the engine is attached to.

<span class="mw-page-title-main">South African gas-electric locomotive</span>

The South African Railways gas-electric locomotive of 1923 was an experimental gas-electric locomotive. The fuel, suction gas, was generated on-board the locomotive from coal.

<i>Sisu</i> (1938 icebreaker) Finnish icebreaker built in 1939

Sisu was a Finnish state-owned icebreaker. Built in 1939 at Wärtsilä Hietalahti Shipyard in Helsinki, she was one of the world's first diesel-electric icebreakers. In addition to icebreaking duties, she served as a submarine tender for the Finnish Navy during the summer months until the end of the Continuation War.

References

  1. Cold-Iron the Ships by Capt. Pawanexh Kohli Archived 2018-10-22 at the Wayback Machine
  2. "Salmon farmer installs 5.6km power supply to feed barge - FishFarmingExpert.com". www.fishfarmingexpert.com. 3 March 2021.
  3. "Marine electrics: the basics of 12-Volt systems". Boats.com.
  4. "Using Shore Power". Scottish Canals.
  5. "Shore Power 101". Fisheries Supply.
  6. "Alternative Fuels and Advanced Vehicles Data Center: Truck Stop Electrification for Heavy-Duty Trucks". 090916 afdc.energy.gov
  7. "Alternative Fuels and Advanced Vehicles Data Center". Archived from the original on 2009-07-11. 090916 afdc.energy.gov
  8. FPWI, Peter Stanton BSc CEng FIMechE FIET (August 25, 2021). "Feeding the train - Intelligent shore supply".
  9. "Making a connection". Port Strategy. 2014-04-07.