In a fuel cell, the chemical energy within the fuel is converted directly into electricity (with by-products of heat and water) without any mechanical drive or generator. This can result in high electrical conversion efficiencies and low emissions. The fuel cell may eventually replace a conventional gas boiler in a central heating system and can generate electricity with a higher efficiency than central power plant and, being located in the home, any waste heat can be used by the household, rather than dumped into the atmosphere.
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