Difference between revisions of "Energy Efficiency"
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| − | <math>Efficiency = \frac{ | + | '' '''Efficiency''' = ([[Useful Energy]] Out)/([[Total Energy]] In)'' |
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| + | <math>Efficiency = \frac{E_{Useful}}{E_{Total}}</math> | ||
Revision as of 20:17, 2 February 2019
Key Stage 4
Meaning
Energy efficiency is a ratio of Useful Energy transferred to total energy put into a system.
About Efficiency
- Energy efficiency is a measure of how effectively energy is transferred from one energy store into an intended energy store.
- Efficiency may be written as a percentage or as a decimal.
- Efficiency as a percentage can never be greater than 100% and as a decimal can never be greater than 1 because you can never get more energy out than you put in due to Conservation of Energy.
Equation
Efficiency = (Useful Energy Out)/(Total Energy In)
\(Efficiency = \frac{E_{Useful}}{E_{Total}}\)