In 2008, the world total of electricity production was 20.279 petawatt-hours (PWh). The invention of the steam turbine in 1883 to drive the electric generator started a strong increase of world electricity consumption. During operation, some part of the energy-depending on the electrical efficiency-is consumed in unintended output, such as waste heat.Įlectricity has been generated in power stations since 1882. h) representing a constant power over a period of time.Įlectric and electronic devices consume electric energy to generate desired output (i.e., light, heat, motion, etc.).6 World electricity consumption and production (20)Įlectric energy is most often measured either in joules (J), or in watt hours (W.5 Electricity consumption of OECD member countries (2008).4 Electricity final consumption by categories (2008).3 Electricity generation and GDP (2009).1.1 World electricity consumption down in 2009.
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