want details of the topic 'fuel cells on aerospace'. ....etc

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FUEL CELLS-Evolving Concepts and Developments

Introduction
Output of conventional batteries are limited.
They are polluting.
Continuous operation results in fall in efficiency.
Output not stable under long durations of operations.

Fuel Cells
An Electrochemical energy conversion device
Produces electricity from external fuel and oxidant.
Can operate virtually continuously as long as the necessary flows are maintained.

General Structure
Two electrodes sandwiched around an electrolyte
Hydro ....etc

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Fuel cells are a proven power source for manned spacecraft where they generate electrical power from stored hydrogen and oxygen that are carried in cryogenic liquid form. The world?s petroleum production is about to pass its peak, so a world wide development effort is being directed into adapting these high efficiency fuel cells into powering automobiles, buses and trucks. Fuel cells are more efficient than the secondary batteries used. First Alkali fuel cells are used in aircrafts, but now a days fuel cells using Proton Exchange Membrane are ....etc

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Bacteria powered batteries use the chemical energy generated by bacteria, and convert it into electrical energy using a relatively simple mechanism. Like most batteries, a bacteria powered battery has an anode (the negative end) and a cathode (the positive end). In addition to the anode and cathode, a bacteria powered battery also has a membrane capable of filtering electrons (anions) and protons (cations) produced during the chemical breakdown of substances by bacteria.
http://alternative-energy-news.info/images/pictures/bacteria-batter ....etc

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Fuel cells are a proven power source for manned spacecraft where they generate electrical power from stored hydrogen and oxygen that are carried in cryogenic liquid form. The world?s petroleum production is about to pass its peak, so a world wide development effort is being directed into adapting these high efficiency fuel cells into powering automobiles, buses and trucks. Fuel cells are more efficient than the secondary batteries used. First Alkali fuel cells are used in aircrafts, but now a days fuel cells using Proton Exchange Membrane are ....etc

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Fuel cells are a proven power source for manned spacecraft where they generate electrical power from stored hydrogen and oxygen that are carried in cryogenic liquid form. The worldâ„¢s petroleum production is about to pass its peak, so a world wide development effort is being directed into adapting these high efficiency fuel cells into powering automobiles, buses and trucks. Fuel cells are more efficient than the secondary batteries used. First Alkali fuel cells are used in aircrafts, but now a days fuel cells using Proton Exchange Membrane ....etc

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BACTERIA POWERED FUEL CELLS FULL SEMINAR REPORT ....etc

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seminar report of 3d solar cell technology,ppt,advantages, ....etc

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A multi-scale model for electrochemistry in proton exchange membrane (PEM) fuel cells has been developed. The multi-scale model involves four scales: atomic-scale for kinetics of chemical/electrochemical reaction, nano-scale for surface reactions, micro-scale for electrolyte transport, and macro-scale. The energetics of chemical and electrochemical reactions are computed using quantum computation which serves as input for the kinetics on nano-scale catalysts which is simulated using the dynamic Monte Carlo (DMC) method. A full fuel cell model w ....etc

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ABSTRACT
Necessity is the mother of invention. Energy crisis is the cry of
future.
The historical and the present-day civilization are closely interwoven
with energy and in future, our existence will be more dependent upon
energy. The conventional sources of energy, the single most important
pre-requisite for power generation, are depleting fast. The world is
heading towards a global energy crisis mostly due to running out of
these energy sources; decreasing the dependency on fossil fuels is
recommen ....etc

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