chapter  13
Energy options
Pages 19

Electricity is the ultimate convenience source of energy which disguises the fact that, with present methods of production and the fuel mix, it is highly energy inefficient. At its point of use, that is, as delivered energy, it is around 30 per cent efficient. Energy is defined as ‘primary’ and ‘delivered’. Primary energy is that which is contained in the fuel in its natural state; delivered energy is that which is in the fuel at the point of use.