Efficiency

A measure of how well a machine changes energy into useful energy.


Examples
Dry plate clutch (transmission efficiency)0.99
Driveshaft joints (transmission efficiency)0.99
Straight gears (transmission efficiency)0.95 to 0.98
Electric heater0.95
Lithium Ion battery10.85-0.95
Lead Acid battery10.70-0.84
Wind turbine20.59
Photosynthesis<0.06

Reference

1 - coulombic efficiency, 2 - theoretical maximum efficiency

See also: Computing Efficiency, Cooling Efficiency, Electric Motor Efficiency, Energy, System Efficiency, Thermal Efficiency, Volumetric Efficiency.

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Subjects: Mechanical Engineering Physics