Notes: Taking the long route to conversion - How to use the chart

Example of low efficiency: Chemical energy of coal is converted into thermal energy as it burns. The thermal energy is absorbed by water and produces steam. Steam is directed against the blades of a turbine, converting the thermal energy into kinetic energy. The kinetic energy of the turbine rotates a generator which converts the mechanical energy to electrical energy.

This proves it is inefficient! Energy should be put to work in as direct a manner as possible. The long route of changing energy through several stages is costly and wasteful.

Example of high efficiency: A wind generator converts mechanical energy directly to electrical energy.