Hydrogen is a versatile energy carrier that can be used to power nearly every end-use energy need. The fuel
cell  an energy conversion device that can efficiently capture and use the power of hydrogen — is the key to making it happen. Stationary fuel cells can be used for backup power, power for remote locations,
distributed power generation,and cogeneration (in which excess heat released during electricity generation
is used for other applications). Fuel cells can power almost any portable application that typically uses batteries, from hand-held devices to portable generators.

Fuel cells can power almost any portable application that typically uses batteries, from hand-held devices to
portable generators. Fuel cells can also power our transportation,including personal vehicles,trucks, buses, marine vessels, and other specialty vehicles such as lift trucks and ground support equipment,as well as provide auxiliary power to traditional transportation technologies.Hydrogen can play a particularly important role in the future by replacing the imported petroleum we currently use in our cars and trucks.
Fuel cells directly convert the chemical energy in hydrogen to electricity, with pure water and potentially useful heat as the only byproducts. Hydrogen-powered fuel cells are not only pollution-free, but they can also have more than two times the efficiency of traditional combustion technologies.A conventional combustion-based power plant typically generates electricity at efficiencies of 33-35%, while fuel cell systems can generate electricity at efficiencies up to 60% (and even higher with cogeneration).The gasoline engine in a conventional car is less than 20% efficient in converting the chemical energy in gasoline into power that moves the vehicle, under normal driving conditions. Hydrogen fuel cell vehicles, which use electric motors, are much more energy efficient and use 40-60% of the fuel’s energy corresponding to more than a 50% reduction in fuel consumption, compared to a conventional vehicle with a gasoline internal combustion engine.In addition, fuel cells operate quietly,have fewer moving parts, and are well suited to a variety of applications.

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