Rocks & mirror

WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

D

348 results

Displacement pump

marine

A pump operating by the reduction or increase in volume of a space by mechanical action which physically moves the liquid or gas.

Displacement vessel

marine

A craft that is supported by the buoyancy of the water it displaces.

Displacement water

marine

Water added to the separator bowl to displace the oil and to ensure there is no loss of oil at sludge discharge.

Display

marine

Means by which a device presents visual information to the navigator, including conventional instrumentation.

Dissolved gases

marine

Any gas present in water. It may be released when boiled.

Dissolved solids

marine

Any impurities existing in pure water either produced by an evaporator or used as boiler feed water.

Distillate

marine

1. Product of condensation of freshwater vapour. 2. Any product obtained by distilling petroleum and condensing the vapours.

Distillate diesel oils

energy

A fuel oil that is derived from the distillation operations.

Distillation

energy

Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation.

Distortion

marine

The effects of welding on a metal plate. It may appear as shrinkage or an angular twisting. Distortion of steel structures caused by welding and other thermal processes can be assigned to three main causes.

Distress

marine

A term used when a ship requires immediate assistance.

Distress alert

marine

A radio signal from a distressed automatically directed to a RCC giving position, identification, course and speed of the vessel as well as the nature of distress.

Distress signal

marine

An urgent signal for help assistance.

Distributed generation

energy

Distributed generation, also distributed energy, on-site generation, or district/decentralized energy, is electrical generation and storage performed by a variety of small, grid-connected or distribution system-connected devices referred to as distributed energy resources.

Distributed load

marine

A load that acts over a part or the whole of the surface of the structure.

Distributed pumping system

energy

A system made up of smaller, individual pumping stations (one flow center for each heat pump) each controlled individually by the operation of the specific heat pump unit that they serve.

Distributed wind

energy

Wind turbines installed on the "customer" side of the electric meter, or are installed at or near the place where the energy they produce will be used.

Distribution

marine

Electricity supply to various items of equipment, often at different voltages.

Distribution board

energy

A distribution board (also known as panelboard, breaker panel, or electric panel) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit breaker for each circuit in a common enclosure.

Distribution substation

energy

A distribution substation transfers power from the transmission system to the distribution system of an area.

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