Coal-Fired Power Plants
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Presented By:
Kristin Scheel
Alejandra Kuhn
Brianna Beconovich
Ryan Nester

[attachment=11836]
Coal-Fired Power Plants
Types of Coal

 Fossil fuel
 It is a readily combustible black or brownish-black sedimentary rock
Coal Mining
 Surface Mining
 Strip Mining
 Underground Mining
Coal Power Plant Operation
 Feedwater
 Feedwater used in a steam boiler to transfer heat energy from the fuel burning area to mech. Energy of spinning steam turbine
 Boiler
 Rectangular furnace, pulverized coal is blown in from fuel nozzles at 4 corners. The coal then burns quickly and forms a fireball at the center (seriously, a fireball!!!).
 Coal Power Plant Operation
 Steam Turbine Generator
 Is a series of steam turbines interconnected to each other and then a generator
 Steam Condenser
 Steam enters from the turbine generator and is pumped into the bottom of the condenser, where pumps recycle the condensed steam from the feedwater
 Stack
 Releases process emissions.
Coal Power Plant Operation
Pros of Coal Power
 Cheap
 Cheaper per unit energy than oil or natural gas
 Will continue to be an important global resource
 Abundance
 Coal is the world’s most abundant fossil fuel
 Sufficient reserves for the next 250 years
Pros of Coal Power
 Electricity
 Supplying approximately 50% of electricity to the US
 Economy
 Coal-mining stimulates over one million jobs in the U.S.
 Coal contributes over $80 billion annually to the economy
 Efficiency
 Larger power plants are more efficient
 38% of the chemical energy is converted to energy
 Safe
 safest fossil fuel to transport, store and use
 scrubbers
Cons of Coal Power
o Coal-Fired Power Plants are the largest contributor of hazardous air pollutants.
Effects on the environment and Human health
 CO2 ~ carbon dioxide pollution, making energy use the single largest source of greenhouse gases in the U.S. and the world
 SO2
o Sulfur dioxide combined with nitrogen oxide react with water and oxygen in the atmosphere to form acidic compounds, which can mix with natural precipitation and fall to the earth as acid rain.
• Effects on the environment and Human health
 NOx
o When nitrogen oxide (chemically) reacts with volatile organic compounds (VOC’s) and sunlight ground-level ozone or smog is formed.
 Mercury
 One of the most dangerous pollutants released into the air through the exhaust system when coal is burned.
Future of Coal
 Economy
 US economy relies on coal importation and exportation
 The demand for coal usage to provide electricity will continue to grow
 Clean coal technology
 A new generation of coal-burning power plants with energy processes that reduce air emissions and other pollutants.
 Clean Air Acts
 Coal power plants technology must adapt to the changing political climate towards environmental issues.
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