Why Electric Cars Are Our Future

Why Electric Cars Are Our Future
Huffington Post – best explanation I’ve heard yet, Bill Destler, President, Rochester Institute of Technology

"First-generation electric vehicles such as the Chevy Volt and Nissan Leaf have failed to gain significant market share in their first two years of availability, and many have concluded that they are not the future of personal transportation, either in the U.S. or elsewhere. Nevertheless, despite this widespread skepticism, other carmakers are rolling out new electric vehicles on a regular basis, including Ford, Tesla, Mitsubishi, Volvo, and BMW, among others.

Why? Because a careful analysis reveals that there are fundamental reasons that will drive manufacturers and consumers inevitably to electric vehicles in the years ahead, reasons that the public in general is unaware of. So here are a few of the reasons that I have learned that lead me to believe that within 50 years a majority of our cars will be equipped with electric drivetrains.

1. Electric vehicles are inherently more efficient at turning energy into miles driven. Most people do not realize this, but electric drivetrains are much more efficient than internal combustion engine (ICE) drivetrains (about 75% vs 25%, in fact). In fact, there is little hope that ICE drivetrains could ever compete with electric drivetrains in terms of efficiency. Why are ICE drivetrains so inefficient? There are many reasons, including heat losses and inertial losses of various kinds, but ICE's are also thermodynamic systems with efficiencies limited by the heat cycle they operate under. Engineers have done amazing work in improving the efficiency of gas-powered cars, but they are up against fundamental limits. In contrast, a Nissan Leaf or a Chevy Volt can go about 40 miles on 11 Kilowatt-hours (KWH) of electricity, the energy equivalent of a third of a gallon of gasoline. And since the national average cost per KWH for electricity is only $0.11, this performance translates cost-wise into the equivalent of more than 120 miles per gallon." read the rest...

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