Diesel generator

Diesel generator image

(Learn how and when to remove this template message) A Cummins diesel generator of 150kVA temporarily parked in a tourist resort in Egypt. A 200:kW Caterpillar diesel generator set in a sound attenuated enclosure used as emergency backup at a sewage treatment substation in Atlanta, United States.

A diesel generator (DG) (also known as diesel genset) is the combination of a diesel engine with an electric generator (often an alternator) to generate electrical energy. This is a specific case of engine-generator. A diesel compression-ignition engine is usually designed to run on diesel fuel, but some types are adapted for other liquid fuels or natural gas.

Diesel generating sets are used in places without connection to a power grid, or as emergency power-supply if the grid fails, as well as for more complex applications such as peak-lopping, grid support and export to the power grid.

Proper sizing of diesel generators is critical to avoid low-load or a shortage of power. Sizing is complicated by the characteristics of modern electronics, specifically non-linear loads. In size ranges around 50 MW and above, an open cycle gas turbine is more efficient at full load than an array of diesel engines, and far more compact, with comparable capital costs; but for regular part-loading, even at these power levels, diesel arrays are sometimes preferred to open cycle gas turbines, due to their superior efficiencies.


Diesel generator set

Diesel generator on an oil tanker.

The packaged combination of a diesel engine, a generator and various ancillary devices (such as base, canopy, sound attenuation, control systems, circuit... ...read more

Diesel locomotive
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Diesel locomotive ... smaller high-speed diesel engines and generators (generator sets), rather than a single medium-speed diesel engine and a single generator. Because of the...

4 days ago

Engine-generator ... watts are necessary for a portable generator. Trailer-mounted generators or mobile generators, diesel generators are also used for emergencies or backup...

Emergency power system
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Emergency power system ... steam turbines for the ship's generator. In such a case, one or more diesel engines are used to drive back-up generators. Early transfer switches relied...

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Combined diesel-electric and gas ... connected to the propeller shafts (usually 2). The motors are powered by diesel generators. For higher speeds, a gas turbine powers the shafts via a cross-connecting...

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Diesel rotary uninterruptible power supply ... flywheel-powered UPS and a diesel generator. When mains electricity supply is within specification, an electrical generator with a mass functions as motor...

Aurora Generator Test
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Aurora Generator Test ... The experiment used a computer program to rapidly open and close a diesel generator's circuit breakers out of phase from the rest of the grid and cause...

Standby generator
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Standby generator ... appliances such as refrigerators, stoves, and water heaters. Diesel generator Electric generator Emergency power system Uninterruptible power supply Robert...

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Electric generator ... more complex than this. Energy portal Diesel generator Electricity generation Electric motor Engine-generator Faraday's law of induction Gas turbine...

Jakson Group
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Jakson Group ... Defence. The Powergen business manufactures and sells diesel generator sets and also constructs diesel power plants. The solar business develops solar power...

1 month ago

Motor–generator ... flawless cut-over from mains power to AC power provided by a diesel generator set. The motor–generator set may contain a large flywheel to improve its ride-through;...

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