QOTD How can we use energy more efficiently in our daily lives? Technology and Energy Efficiency MR. DUNNUM What is energy efficiency? Energy efficiency is the measure of the useful energy produced compared to the energy converted to low quality--- usually heat. Technology and energy conservation Implementing new technology to do same work using less energy. Heating homes more efficiently Driving more efficient cars Lightning spaces more efficiently SAVES $$$, produces less pollution, reduces CO 2 Numbers Dont Lie 84% of commercial electricity is wasted in U.S. 41% of energy is automatically wasted due to 2nd Law Of Thermodynamics 43% is wasted unnecessarily Benefits Real World examples Initial Cost plus the lifetime cost. Some energy efficient models may cost more up front, but save money in the long run Net Energy Efficiency Measure of how much useful energy we get from energy resource after subtracting the energy wasted. How much energy you get out given ALL the wasted energy. Comparing Efficiency Energy Lost