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WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

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Waste-to-energy

energy

Waste-to-energy is the process of generating energy in the form of electricity and/or heat from the primary treatment of waste, or the processing of waste into a fuel source.

Waste-to-energy plants

energy

Waste-to-energy plants burn solid waste, often called garbage or trash, to produce steam in a boiler that is used to generate electricity.

Watch

marine

A time period, usually of four hours, e.g. 12-4, 4-8, 8-12, which operates round the clock.

Watch alarm

marine

An alarm that is transferred from the bridge to the master and the backup navigator in the event deficiency (absence, lack of alertness, no response to another alarm/warning, etc.), of any officer on watch.

Watch alarm system

marine

The watch alarm system urges the officer on watch at a predetermined time to acknowledge his watch-keeping awareness.

Water

energy

Water is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms.

Water cooling

energy

Water cooling is a method of heat removal from components and industrial equipment.

Water curtain

marine

Some tankers have a fixed system to give a protective water curtain between the cargo deck and the superstructure.

Water cycle

energy

The water cycle, also known as the hydrologic cycle or the hydrological cycle, describes the continuous movement of water on, above and below the surface of the Earth.

Water fog

marine

A suspension in the atmosphere of water divided into coarse drops by delivery through a special nozzle for use in fire fighting.

Water hammer

energy

Hydraulic shock (water hammer or fluid hammer) is a pressure surge or wave caused when a fluid, usually a liquid but sometimes also a gas, in motion is forced to stop or change direction suddenly.

Water heating

energy

Water heating is a heat transfer process that uses an energy source to heat water above its initial temperature.

Water level

energy

Water level, also known as gauge height or stage, is the elevation of the free surface of a sea, stream, lake or reservoir relative to a specified vertical datum.

Water level gauge

marine

A device to provide a visible indication of water level in the boiler.

Water resource management

energy

Water resource management is the activity of planning, developing, distributing and managing the optimum use of water resources.

Water seal

marine

Water, added to the separator bowl to prevent the oil from leaving the bowl through the water outlet, in the purifier mode.

Water spray

marine

A suspension in the atmosphere of water divided into coarse droplets delivered through a special nozzle for use in fire fighting.

Water tube boilers

energy

In water tube boilers, water circulates in tubes heated externally by hot exhaust gas from an engine.

Water turbine

energy

A rotory engine that converts water energy into power from its flow from height. Usually found in water dams.

Water wheel

energy

A water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill.

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