Rocks & mirror
WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

5802 results

Underground coal gasification

energy

A process to convert coal to gas which occurs underground. Coal, and volatiles embedded in the coal (mostly methane) are partially combusted in the presence of steam, oxygen and / or air, to produce hydrogen and carbon monoxide.

Underfloor heating

energy

Underfloor heating and cooling is a form of central heating and cooling that achieves indoor climate control for thermal comfort using hydronic or electrical heating elements embedded in a floor.

Unconventional wind turbines

energy

Unconventional wind turbines are those that differ significantly from the most common types in use.

Ultraviolet (UV)

energy

A form of electromagnetic radiation with wavelength from 10 nm to 400 nm (750 THz), shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun.

Ultrasonic testing

energy

Ultrasonic testing is a family of non-destructive testing techniques based on the propagation of ultrasonic waves in the object or material tested.

UltraBattery

energy

UltraBattery is a hybrid energy storage device invented by Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO).

Ultra-supercritical steam

energy

Ultra-supercritical – up to 1,400 °F (760 °C) and pressure levels of 5,000 psi (340 bar)

Transformer

energy

A passive electrical device that transfers electrical energy from one electrical circuit to another, or multiple circuits.

Transfer switch

energy

A switch used to transfer an electrical load from one source to another. Utilised when a source has failed and can include manual or automatic switching.

Transesterification

energy

In organic chemistry, transesterification is the process of exchanging the organic group R″ of an ester with the organic group R′ of an alcohol as is used in the production of biodiesel.

Trademark

energy

A trademark is a type of intellectual property consisting of a recognizable sign, design, or expression which identifies products or services of a particular source from those of others, although trademarks used to identify services are usually called service marks.

Traction power network

energy

A traction network or traction power network is an electricity grid for the supply of electrified rail networks.

Traction

energy

Traction, or tractive force, is the force used to generate motion between a body and a tangential surface, through the use of dry friction, though the use of shear force of the surface is also commonly used.

Track record

energy

A measure of how well, or badly, a product, person or organisation has performed in the past.

Toxicity

energy

Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism.

Toxic waste

energy

Toxic waste is any unwanted material in all forms that can cause harm (e.g. by being inhaled, swallowed, or absorbed through the skin).

Town gas

energy

Town gas is a general term referring to manufactured gaseous fuels produced for sale to consumers and municipalities.

Tower shadow

energy

The alteration in uniform flow of wind due to the presence of the tower

Total primary energy supply

energy

The sum of production and imports subtracting exports and storage changes.

Torrefaction

energy

Torrefaction is a thermochemical treatment of biomass at 200 to 320 °C (392 to 608ºF).

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