19-10-2012, 03:57 PM
Energy Efficiency
5. Energy Efficiency.ppt (Size: 781.5 KB / Downloads: 305)
Efficiency of Energy Conversion
If we are more efficient with the energy we already have there will be less pollution, less reliance on foreign oil and increased domestic security.
Heat Engine
A heat engine is any device which converts heat energy into mechanical energy.
Accounts for 50% of our energy conversion devices
Inference
A maximum of 64% of the fuel energy can go to generation. To make the Carnot efficiency as high as possible, either T hot should be increased or T cold should be decreased.
System Efficiency
The efficiency of a system is equal to the product of efficiencies of the individual devices (sub-systems)