Energy Efficiency PPT
- Efficiency= effective operation as measured by comparison of production
- Energy Efficiency: refers to measure of useful energy
- 2nd law of thermodynamics= spontaneous change, entropy of universe must increase. Quality of energy deteriorates.
- Entropy= measure of randomness in a system
- chemical --> mechanical (+ heat)
- input=all components entering a system
- Throughout=flow of all components within system
- Output= all components leaving
- % efficiency = (output ÷ input) x 100
- feedback loop= circular process
- Negative feedback=reverse direction of flow
- Positive feedback= Change of rate through throughput
- Positive feed back:
that moves the system in the same direction. The input and
output drive the system further toward one extreme or
another
- Positive feedback=bad
- Negative=GOOD
- Solar energy, wind energy and geothermal energy are alternatives to fossil fuel usage
- Ethanol= corn energy
- Energy star appliances are more efficient in energy
- Fuel cell cars run on hydrogen cars