Rocks & mirror

WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

D

348 results

Demersal species

marine

Fish which live at the bottom of the sea, for instance a sole, a hake and a halibut and those which live near the bottom like a cod, a haddock.

Dendamix Marine

marine

A spray-on mineral-fibre insulation material. Using Dendamix Marine as noise or thermal insulation is said to give substantial savings to shipyards...

DeNOx

marine

Process of removing nitrogen oxides (NOx) from the exhaust of lean-burn engines, especially by using selective catalytic reduction (SCR).

Density

energy

The density of a substance is its mass per unit volume.

Density of states

energy

the density of states (DOS) of a system describes the proportion of states that are to be occupied by the system at each energy.

Dependent and independent variables

energy

Dependent and independent variables are variables in mathematical modeling, statistical modeling and experimental sciences.

Depleted uranium

energy

Most depleted uranium arises as a by-product of the production of enriched uranium for use as fuel in nuclear reactors and in the manufacture of nuclear weapons.

Deposit attack

marine

An attack at the edge of a local deposit formed on metal surface in the presence of an electrolyte.

Depth

marine

- Depth moulded – Moulded depth of a ship is measured at the middle of length L, from the top of keel to the uppermost continuous deck at side. - Extreme depth – The depth of the ship from the upper deck to the underside of the keel.

Depth of charge

energy

Depth of Discharge is the fraction or percentage of the capacity which has been removed from the fully charged battery.

Depth of discharge

energy

Depth of Discharge (DoD) is the fraction or percentage of the capacity which has been removed from the fully charged battery.

Depth of fusion

marine

The distance that fusion penetrates the base metal or previous bead from the surface melted during welding.

Derating

marine

The operation of a diesel engine at normal maximum cylinder pressure for its continuous sea service rating, but at a lower mean effective pressure and shaft speed.

Derelict

marine

Deserted goods or any other commodity, especially a vessel abandoned at sea.

Derrick

energy

The tower-like structure that houses the drilling controls for a drilling rig.

Desalination

marine

The removal of any chemical salts from seawater to produce distilled water. The equipment used may be described as a distiller, an evaporator or a freshwater generator.

Desander / desilter

energy

Desanders and desilters are solid control equipment with a set of hydrocyclones that separate sand and silt from the drilling fluids in drilling rigs.

Descaling agent

energy

A descaling agent or chemical descaler is a liquid chemical substance used to remove limescale from metal surfaces in contact with hot water, such as in boilers, water heaters, and kettles.

Desert climate

energy

The desert climate or arid climate is a climate which there is an excess of evaporation over precipitation.

Desiccant

marine

A substance which can absorb moisture, e.g. anhydrous calcium chloride. It is often used as a drying agent.

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