What's mean is Fuel Cell ? by mary lv

fuel cell is an electrochemical device which combines hydrogen fuel with

oxygen to produce electric power, heat and water. In many ways, the fuel cell

resembles a battery. Rather than

applying a periodic recharge, a continuous supply of oxygen and hydrogen is

supplied from the outside. Oxygen is drawn from the air and hydrogen is

carried as a fuel in a pressurized container. As alternative fuel, methanol,

propane, butane and natural gas can be used. The fuel cell does not generate

energy through burning; rather, it is based on an electrochemical process.

There are little or no harmful emissions. The only release is clean water. In

fact, the water is so pure that visitors to Vancouver's Ballard Power

Systems, the leader in the development of the proton exchange membrane fuel

cell (PEMFC), drank clear water emitted from the tailpipes of buses powered

by a Ballard fuel cell. The fuel cell is twice as efficient in converting fuel to energy through a

chemical process than combustion. Hydrogen, the simplest element consisting

of one proton and one electron, is plentiful and is exceptionally clean as a

fuel. Hydrogen makes up 90 percent of the composition of the universe and is

the third most abundant element on the earth's surface. Such a wealth of fuel

would provide an almost unlimited pool of energy at relatively low cost. But

there is a price to pay. The fuel cell

core (or 'stack'), which converts oxygen and hydrogen to electricity, is

expensive to build. more info:www.good-battery.com

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