Coal - To turn the lights on(use electricity on a large...

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To turn the lights on (use electricity on a large scale), we need to be able to turn a generator as cheaply and reliably as we can µ Turbines provide the ROTARY WORK to turn the generator HYDRO-supplies 20% of our electricity STEAM-supplies all the rest Need to generate large quantities of steam cheaply and quickly High rates of heat transfer AND High rates of heat release Water tube boiler WHY COAL? 1) 50-55% of U.S. electricity comes from coal fed plants 2) 50% of U.S. coal production goes to electric plants 3) The coal relates to numerous environmental problems -We have to burn a lot of coal very quickly -Coal is made out of pure carbon Burning of Coal-C +O2=CO2 -Carbon atoms on inside and outside of coal. One of carbon reacts with oxygen and creates CO2 -No access of oxygen to carbon atoms in the interior of the piece -Only carbon atoms at the surface of a piece of coal can react with oxygen -Combustion rate of coal is limited by the available surface area of the coal CUBICLE PIECE OF COAL 1 INCH ON EACH SIDE
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Coal - To turn the lights on(use electricity on a large...

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