Glossary

CCGT	Combined cycle gas turbine – these turbines are typically fuelled by natural gas and are used to drive generators to produce electricity. The exhaust gases are then passed through a boiler to produce steam that in turn drives an additional turbine coupled to a generator.
Cogeneration	The simultaneous generation of heat and electricity, typically where the need for both arises for industrial or commercial purposes.
GW	Gigawatt; one gigawatt equals 1,000,000 kW.
GWh	Gigawatt-hour; one GWh represents one hour of electricity consumption at a constant rate of 1 GW.
Heat Rate	A measure of the thermal efficiency achieved by a power station.
Humification	The rapid decaying of plant materials, results in the formation of peat.
ISO 14001	The international standard for environmental management systems.
kW	Kilowatt; a kilowatt is a unit of power, representing the rate at which energy is used or produced (ie, the product of voltage and current).
kWh	Kilowatt-hour; one kWh represents one hour of electricity consumption at a constant rate of 1 kW.
MW	Megawatt; one MW equals 1,000 kilowatts.
MWh	Megawatt-hour; one MWh represents one hour of electricity consumption at a constant rate of 1 MW.
NOx	Oxides of nitrogen.
OCGT	Open cycle gas turbine – these turbines, typically fuelled by gas-oil, are used to drive the generators to produce electricity.
Peak Load	The maximum demand during a specified period. This may require use of plant (for example, pumped storage) that is generally idle.
SO₂	Sulphur dioxide.
TW	Terawatt; one TW equals 1,000,000 MW.
TWh	Terawatt-hour; one TWh represents one hour of electricity consumption at a constant rate of 1TW