what are fuel cells
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Answer:
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Fuel cells make electricity by combining oxygen and hydrogen. Efficiency is very good (about 40%-70%). They have a maximum efficiency of 83% if exhaust heat is used during the reaction. Also, fuel cells can use various fuels, for example, natural gas, methanol, LPG (Liquid Petroleum Gas), naphtha, kerosene etc.
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Explanation:
fuel cells are the devices which convert the chemical energy of a fuel directly into electricity by electrochemical reactions.
A fuel cell resembles a battery in many respects, but it can supply electrical energy over a much longer period of time. This is because a fuel cell is continuously supplied with fuel and air (or oxygen) from an external source, whereas a battery contains only a limited amount of fuel material and oxidant that are depleted with use. For this reason fuel cells have been used for decades in space probes, satellites, and manned spacecraft. Around the world thousands of stationary fuel cell systems have been installed in utility power plants, hospitals, schools, hotels, and office buildings for both primary and backup power; many waste-treatment plants use fuel cell technology to generate power from the methane gas produced by decomposing garbage. Numerous municipalities in Japan, Europe, and the United States lease fuel cell vehicles for public transportation and for use by service personnel. Personal fuel cell vehicles were first sold in Germany in 2004.
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