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December 8, 2004
Physics Today: The Hydrogen Economy
A major attraction of hydrogen as a fuel is its natural compatibility with fuel cells. The higher efficiency of fuel cells--currently 60% compared to 22% for gasoline or 45% for diesel internal combustion engines--would dramatically improve the efficiency of future energy use. Coupling fuel cells to electric motors, which are more than 90% efficient, converts the chemical energy of hydrogen to mechanical work without heat as an intermediary. This attractive new approach for energy conversion could replace many traditional heat engines. The broad reach of that efficiency advantage is a strong driver for deploying hydrogen fuel cells widely.
Physics Today December 2004- The Hydrogen Economy
(from WorldChanging)
Posted by thdyck on December 8, 2004
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