4 Coal Power Plant Operation FeedwaterFeedwater used in a steam boiler to transfer heat energy from the fuel burning area to mech. Energy of spinning steam turbineBoilerRectangular 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!!!).
5 Coal Power Plant Operation Steam Turbine GeneratorIs a series of steam turbines interconnected to each other and then a generatorSteam CondenserSteam enters from the turbine generator and is pumped into the bottom of the condenser, where pumps recycle the condensed steam from the feedwaterStackReleases process emissions.
7 Pros of Coal Power Cheap Abundance Cheaper per unit energy than oil or natural gasWill continue to be an important global resourceAbundanceCoal is the world’s most abundant fossil fuelSufficient reserves for the next 250 years
9 Pros of Coal Power Electricity Economy Supplying approximately 50% of electricity to the USEconomyCoal-mining stimulates over one million jobs in the U.S.Coal contributes over $80 billion annually to the economy
10 Pros of Coal Power Efficiency Safe Larger power plants are more efficient38% of the chemical energy is converted to energySafesafest fossil fuel to transport, store and usescrubbers
11 Cons of Coal PowerCoal-Fired Power Plants are the largest contributor of hazardous air pollutants.Sulfur dioxide (SO2)Nitrogen Oxide (NOx)Carbon Dioxide (CO2)Mercury
12 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 worldPower plants emit 40% of total U.S. carbon dioxide pollution, the primary global warming pollutant.Although coal-fired power plants account for just over half of the electricity produced in the U.S. each year, they have been responsible for over 83% of the CO2 pollution since 1990.
13 Effects on the environment and Human health 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.Sulfur dioxide can also combine with nitrogen oxide and other particles to form particulate matter.trigger heart attacks and strokeslead to cardiac arrhythmia (irregular heartbeat)respiratory irritation, and worsen asthma.premature death (Both short-term and long-term exposure)In the U.S., coal-fired power plants are the single largest source of SO2 pollution (66%)and the second largest source of NOx pollution.
14 Effects on the environment and Human health NOxWhen nitrogen oxide (chemically) reacts with volatile organic compounds (VOC’s) and sunlight ground-level ozone or smog is formed.An estimated million Americans live in areas with unhealthy levels of smog according to the The American Lung Association.
15 Effects on the environment and Human health MercuryOne of the most dangerous pollutants released into the air through the exhaust system when coal is burned.Coal-fired power plants are the largest single man-made source of mercury pollution in the U.S.
16 Future of CoalEconomyUS economy relies on coal importation and exportationThe demand for coal usage to provide electricity will continue to grow
17 Future of Coal Clean coal technology A new generation of coal-burning power plants with energy processes that reduce air emissions and other pollutants.Clean Air ActsCoal power plants technologymust adapt to the changingpolitical climate towardsenvironmental issues.