Top: Science: Energy: Bioenergy: Terminology: G



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Gas turbine

(combustion turbine) A turbine that converts the energy of hot compressed gases (produced by burning fuel in compressed air) into mechanical power. Often fired by natural gas or fuel oil.


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Gasification

A chemical or heat process to convert a solid fuel to a gaseous form.


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Gasifier

A device for converting solid fuel into gaseous fuel. In biomass systems, the process is referred to as pyrolitic distillation. See Pyrolysis.


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Genetic selection

Application of science to systematic improvement of a population, e.g. through selective breeding.


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Gigawatt

(GW) A measure of electrical power equal to one billion watts (1,000,000 kW). A large coal or nuclear power station typically has a capacity of about 1 GW.


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Greenhouse effect

The effect of certain gases in the Earth's atmosphere in trapping heat from the sun.


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Greenhouse gases

Gases that trap the heat of the sun in the Earth's atmosphere, producing the greenhouse effect. The two major greenhouse gases are water vapor and carbon dioxide. Other greenhouse gases include methane, ozone, chlorofluorocarbons, and nitrous oxide.


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Grid

An electric utility company's system for distributing power. 



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