Electricity is generally regarded as an expensive form of energy. The overall
efficiency of public generation from fossil fuels is usually low - 30% or less - so
that electricity may be regarded, also, as wasteful of energy resources. However,
the fuels used by power stations are usually low-grade ones. Possible advantages
in electricity end-uses must also be taken into account in arriving at a balanced
judgement in any particular case. Ease of control, high thermal efficiency and
freedom from pollution at the point of use, must be considered. Where energy
costs are a small proportion of total costs, reduced labour, improved product
quality and better yields may be significant. When any of these can be attributed
to the use of electricity, its higher cost may well be justified.
Electricity is generally regarded as an expensive form of energy. The overallefficiency of public generation from fossil fuels is usually low - 30% or less - sothat electricity may be regarded, also, as wasteful of energy resources. However,the fuels used by power stations are usually low-grade ones. Possible advantagesin electricity end-uses must also be taken into account in arriving at a balancedjudgement in any particular case. Ease of control, high thermal efficiency andfreedom from pollution at the point of use, must be considered. Where energycosts are a small proportion of total costs, reduced labour, improved productquality and better yields may be significant. When any of these can be attributedto the use of electricity, its higher cost may well be justified.
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