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February 2014
library  >  Qpedia - Monthly Thermal eMagazine

Passive Thermal Management Technology for Fuel Cell Part 2: Passive Cooling Plates


the importance of fuel cells cannot be over-estimated.  a fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent [1]. while hydrogen is the most common fuel, hydrocarbons such as natural gas and alcohols like methanol are sometimes used.


individual fuel cells produce relatively small electrical potential, about 0.7 volts, so cells are stacked, or placed in a series, to increase the voltage and meet an application's requirements. in addition to electricity, fuel cells produce water, heat and, depending on the fuel source, very small amounts of nitrogen dioxide and other emissions.


the energy efficiency of a fuel cell is generally between 40 to 60%, or up to 85% efficient in cogeneration if waste heat is captured for use.  for part 1 of this series please click here.  t


o read the rest of part 2, please click here to access the free full article in pdf.



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