Hydrogen powered cars use a fuel cell to generate energy. They combine hydrogen that is stored in a tank and oxygen that comes from the air to form water and electricity. The chemical energy that is stored in the hydrogen is converted to mechanical energy which powers the car . Combustion engines on the other hand use hydrocarbon fuels to propel the car. The piston is pushed downwards by rotation of the camshaft which makes the intake valves to open up and in turn fills the chamber with fuel and oxygen. At this time the exhaust valves remain closed. The intake valves ...
Essays on Hydrogen Economy
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Abstract
Recently, attention has been diverted to clean, alternative and renewable technologies due to the depletion of petroleum resources and increase of the green house gases from the combustion of fuel resources. Fuel cell is the fore-runner of these technologies and has received immense impetus due to its relatively clean source of energy. Fuel-cells are devices that produce electrical energy from chemical transformation reactions. Electrodes are placed within an electrolyte medium that facilitates oxidation of fuel. In these electrochemical reactions, ions are generated that generate electricity. This electrical energy can be effectively harnessed to carry out a myriad of functions. Since ...
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