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Hydrogen, Nuclear Fission and the Sun, Sources of Energy Today

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Kreen Teth

on 21 May 2010

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Transcript of Hydrogen, Nuclear Fission and the Sun, Sources of Energy Today

Energy Sources Today Nuclear Solar Hydrogen Actually, they are called photovoltic panels, not solar panels, though they harness solar energy. The photovoltic style of harnessing energy starts by setting up the increasingly popular solar panels, which are essentially giant miorrors. Behind the miorror are "cells" that are each their own circut. Each circut contains electrons that are excited by the ultra-violet radiation and photons from the sun. Once excited, the electrons travel to a seperate portion of the cell (usually the bottem) and are released to travel around the circut, creating an electric flow of energy through the completed circut. By inturrupting and reconnecting the circut with an appliance or other object attatched, you can power that object. Hello How are you? I'm fine, thanks for asking This is a great day Wheeeeee smaller Hydrogen energy is debatably the most enviromentally friendly energy source available. Smaller... Hydrogen power is capeable of powering city busses and (expensive) cars. It's only emmisions are steam and it it an entirely renewable recource. As the only pollutant released by the process is steam, it is healthy for the Earth and for those around us. Hydrogen fuel cells require only hydrogen and oxygen for operation, though methane gas and gasoline may be used as well. Each cell consists of two electrodes (one containing oxygen, the other the hydrogen), two bipolar plates (the anode and the cathode), and an electrolyte (proton membrane). Electrolyte Cathode Anode Hydrogen is pumped into the cell through the anode. P E E The protons and electrons are drawn to the cathode, but run into a problem with the electrolyte. Only protons can pass through the membrane. The electrons are seperated from the protons and must find a way to the cathode. So the electrons abandon the most direct path and find another. They end up in a electrical circut. By passing through that coil, the electrons generated electricity. Now at it's goal, the electrons will rejoin with the protons and once again form hydrogen molecules. This side of the electrolyte is full of oxygen, so when the reformed hydrogen and the oxygen join, they make H2O, water, in the form of steam which is channeled out of the cell as the "waste" of the process. Eventually, we hope to be able to reuse the reunited hydrogen, but such systems would currently be to expensive and complex for your average generator. Admittably, hydrogen as a fuel source can be very expensive, but it has been decreasing in price at a fairly steady rate. You have to buy the canisters of hydrogen and refil them, but it is still much less expensive than gas, and hydrogen is an extremely renewable resource.
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