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United States Coal Generation

United States Coal Generation. Asia Pacific Partnership Brown Coal (Lignite) Best Practice Workshop Melbourne, Australia 23 - 27 June 2008. Gas 26%. Coal 27%. Gas 24%. Coal 25%. Nuclear 6%. Nuclear 5%. Oil 37%. Oil 33%. Renewables 8%. Renewables 9%.

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United States Coal Generation

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  1. United States Coal Generation Asia Pacific Partnership Brown Coal (Lignite) Best Practice Workshop Melbourne, Australia 23 - 27 June 2008

  2. Gas 26% Coal 27% Gas 24% Coal 25% Nuclear 6% Nuclear 5% Oil 37% Oil 33% Renewables 8% Renewables 9% Growing World Energy Demand World Energy Consumption Today World Energy Consumption 2030 465 QBtu or 490 EJ 86% Fossil Energy 722 QBtu or 761 EJ 87% Fossil Energy World today and tomorrow data from EIA AEO 2007, early release for years 2006 and 2030. U.S. Department of Energy

  3. Current US Electricity Supply Mix

  4. Power generation Other 4 000 TE Other OECD 3 500 EU27 3 000 Japan US 2 500 Other DC Mtoe 2 000 India China 1 500 1 000 500 0 2005 2030 2005 2030 Coal is expected to play a key role in growth of Emerging Economies Coal input Global CO2 emissions from coal: 11 GtCO2 in 2005, 19 GtCO2 in 2030 Source: IEA, World Energy Outlook 2007, Reference scenario.

  5. Age of Existing Coal-Fired Capacity in 2005 (MW) in India, China, and USA Data Source: Platts UDI, 2005

  6. US Coal-Fired Power Plants

  7. US Coal-Producing Region Source: Platts

  8. US Coal Production, 1949-2006 (Million Short Tons) U.S. Department of Energy

  9. US Coal Production by Rank(2006) Source: EIA, International Energy

  10. US Lignite Composition • The lignite in North Dakota and Texas have a high moisture content • 20 to 40 weight percent • A low heating value • 5,000 to 7,500 British thermal units per pound [Btu/lb], on a wet basis

  11. Great River Energy Large Scale US DOE Demo Project Lignite Fuel Enhancement - applicable to power plants burning inherentlyhigh-moisture coals. Achieving higher plant efficiencies, lower operating costs, and lower emissions. Total Project funding: $25.6 million (DOE share: $11 million). Feeder Wet Coal To Boiler Baghouse Hopper Fluidized Bed 1 Cyclone 546 MWe Coal Creek Station Underwood, ND Fluidized Bed 2 Two-Stage Fluidized Bed Lignite Dryer System using Waste Heat

  12. Efficiency Improvements of Coal-Fired Electric Generating Units • U.S. coal fleet current operating heat rate is 10,400 Btu/kWh • Efficiency of a new power plant is largely a function of economic choice • To produce higher efficiencies, higher pressure and temperatures are required • Power plant efficiency can add value by reducing the amount of fuel used and thereby the amount of CO2 emitted

  13. Conclusions • Energy Produced by Coal Is Expected to Increase by 50% in the next 20-30 Years • Increased Efficiency of Existing & New Coal Fleet is an Imperative • Characteristics of Coal Sources Is Changing • Research Concerning Coal Drying is Critical

  14. Discussion • Questions • Comments

  15. India

  16. India

  17. India

  18. India

  19. India

  20. India

  21. India

  22. India

  23. India

  24. India

  25. India

  26. India

  27. India

  28. Extra Info • Background Materials on R&D

  29. Electricity Generation Capacity by Fuel Type in 2005 (%) China, India, and USA Data Source: Platts UDI, 2005

  30. Age of Existing Coal-Fired Units in 2005 (Number of Units) in India, China, and USA Data Source: Platts UDI, 2005

  31. Additional Slides onGreat River Energy DOE Factsheet

  32. Great River Energy • Increasing Power Plant Efficiency: Lignite Fuel Enhancement • The objective of this project is to demonstrate that the moisture reduction of lignite coal will increase its value as a fuel in power plants • The project will be conducted at the Great River Energy’s Coal Creek Station in Underwood, North Dakota. • The demonstration activities will focus on using waste heat in the plant to lower the moisture content of lignite (typically about 40 percent moisture) Coal Creek Station

  33. Increasing Power Plant Efficiency: Lignite Fuel Enhancement • This technology could be applied to increase the generating capacity, efficiency, and cost-effectiveness of units that burn high-moisture coal. • Currently in the U.S., units totaling more than 100 GW installed capacity are burning coal with high moisture content. • Application of this technology could result in a reduction in the emissions from coal-fired power plants because the plants will require less coal after it is dried to produce the same amount of power. • In this project, the moisture in the lignite would be lowered by about ten percentage points. • This technology increases the efficiency of plants burning lignite and other high moisture coals.

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