Rocks & mirror

WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

D

348 results

Deep geological repository

energy

A deep geological repository is a way of storing toxic or radioactive waste within a stable geologic environment (typically 200–1000 m deep).

Deep pipelaying

marine

Deepwater generally means greater than 500m, whereas very deep water means 1000m or deeper for offshore pipeline installations.

Deep water

energy

Water depths greater than 60 meters.

Deep water source cooling

energy

Deep water source cooling (DWSC) or deep water air cooling is a form of air cooling for process and comfort space cooling which uses a large body of naturally cold water as a heat sink.

Deep-sea trades

marine

The traffic routes of both cargo and passenger vessels which regularly operate on the high seas or on long voyages.

Deepwell cargo pumps

marine

Electrically- or hydraulically-driven cargo pumps used in tanker cargo pumping system. A deepwell pump is submerged in the fluid that it is pumping with its impeller placed in a well in the tanktop...

Defect of welded joint

marine

A discontinuity or discontinuities that by nature or accumulated effect (for example total crack length) render a part or product unable to meet the minimum applicable acceptance standards or specifications. This term designates rejectability.

Defective weld

marine

A weld with one or more defects.

Deformation

energy

Deformation refers to the change in size or shape of an object.

Degasser

energy

A degasser is a device used in drilling to remove gasses from drilling fluid which could otherwise form bubbles.

Dehumidification

marine

Reducing the humidity. Humidity and condensation can cause damage to cargoes and also to the holds or tanks containing them.

Dehumidifier

marine

A substance or a machine used to reduce humidity in holds or cargo tanks. Calcium chloride and silica gel are water-absorbing chemicals (desiccants) commonly in use.

Delamination

marine

Peeling from undercoat or substrate.

Delayed neutron

energy

A delayed neutron is a neutron emitted after a nuclear fission event, by one of the fission products, any time from a few milliseconds to a few minutes after the fission event.

Delta P

energy

Difference in pressure between two test points

Delta T

energy

Temperature difference between two test sites such as supply and return air or entering and leaving water in ground loop.

Delta-wye transformer

energy

A type of three-phase electric power transformer design that employs delta-connected windings on its primary and wye/star connected windings on its secondary.

Demand (DMD)

energy

The electrical input required to operate a ground source heat pump unit for space conditioning.

Demand response

energy

Demand response is a change in the power consumption of an electric utility customer to better match the demand for power with the supply.

Demand-side management

energy

Demand-side management is the modification of consumer demand for energy through various methods such as financial incentives and behavioral change through education.

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