Rocks & mirror

WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

G

178 results

Gasoline, petrol

marine

A distillate of petroleum which is used in spark ignition internal combustion engines. Ignition qualities are measured with an octane number.

Gassing

energy

Excessive battery charging causes electrolysis, emitting hydrogen and oxygen.

Gate valve

marine

A valve which permits for uninterrupted flow when open; see Stop valves.

Gauge

marine

An instrument or device for measuring, indicating or comparing a physical characteristic.

Gauge glass

marine

A glass tube or arrangement of glass plates fitted to a gauge used to give a visual indication of the level of liquid in a tank, pressure vessel, or boiler.

Gauge pressure

energy

Gauge pressure is zero-referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure.

Gauging

marine

1. Tank gauging, level gauging – the process of measuring tank contents. 2. Thickness measurements which are carried out to evaluate the corrosion wastage of hull structure.

Gauging devices (for measuring the tank contents)

marine

Closed gauging device – A device which is separated from the tank atmosphere and keeps tank contents from being released.

Gauging systems

marine

Electro-pneumatic system – This system involves blowing air down the pipe to the liquid in the tank and measuring the pressure needed to force the liquid out of the pipe.

GE Wind Energy

energy

GE Wind Energy is a branch of GE Renewable Energy, a subsidiary of General Electric.

Gear box

energy

In conventional wind turbines, the blades spin a shaft that is connected through a gearbox to the generator.

Gear pump

energy

This is the simplest form of rotary positive-displacement pumps.

Geared

marine

A vessel equipped to load and discharge by its own means (derricks or cranes).

Gearless

marine

A vessel not equipped to load and discharge by its own means (without derricks or cranes).

Gearless wind turbine

energy

Gearless wind turbines (also called direct drive) get rid of the gearbox completely.

Geiger counter

energy

A Geiger counter is an instrument used for detecting and measuring ionizing radiation.

Gel

energy

A gel is a semi-solid that can have properties ranging from soft and weak to hard and tough. Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in the steady-state.

Gel battery

energy

A modern gel battery is a VRLA battery with a gelified electrolyte; the sulfuric acid is mixed with fumed silica, which makes the resulting mass gel like and immobile.

Gel point

energy

The gel point is an abrupt change in the viscosity of a solution containing a polymer.

Gelation

energy

Gelation (gel transition) is the formation of a gel from a system with polymers.

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