Geothermal Power Plant Design

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1.Geothermal Basics
2. Plant Design
3. Questions

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Geothermal Power Plant Design

  1. 1. Geothermal Power Plant Design Presented By: Tom Ettinger, PEProcesses Unlimited International Inc. N NOOTER/ERIKSEN E
  2. 2. Presentation Overview 1. Geothermal Basics 2. Plant Design 3. Questions N NOOTER/ERIKSEN E
  3. 3. Worldwide Geothermal Capacity in MWe N NOOTER/ERIKSEN E
  4. 4. Geothermal Basics Advantages Disadvantages • Renewable Resource • Transmission • Government Incentives • Resource Risk • Environmentally Friendly • First Cost • Base Load • Low Fuel Cost N NOOTER/ERIKSEN E
  5. 5. Geothermal Basics Design Challenges • Resource Conditions • Choosing a Site • How Big to Build the Plant • Choosing a Process N NOOTER/ERIKSEN E
  6. 6. Geothermal BasicsPlant Types • Steam (condensing & non-condensing) • Steam Flash (condensing & non-condensing) • Binary (air vs. water-cooled) • Geopressured • Hypersaline • Bottoming/Topping N NOOTER/ERIKSEN E
  7. 7. N NOOTER/ERIKSEN E
  8. 8. Direct Steam – Process Schematic TURBINE GENERAT OR CONDENSER TO VACUU M SYSTEM C OOLING T OWER COOLIN G WATER PUMP PROD UCTION WELL GEOTHERM AL R ESOURCE N NOOTER/ERIKSEN E
  9. 9. Direct Steam – Geysers N NOOTER/ERIKSEN E
  10. 10. Kenya Non-Condensing Power Plant Non- N NOOTER/ERIKSEN E
  11. 11. Flash – Process Schematic N NOOTER/ERIKSEN E
  12. 12. Single Flash - Dieng 1 N NOOTER/ERIKSEN E
  13. 13. Dixie Valley Dual Flash N NOOTER/ERIKSEN E
  14. 14. Dual Flash - Brady Power Plant N NOOTER/ERIKSEN E
  15. 15. Flash Plant Design Challenge High NC Gas Content NCG varies from nil to 6% • Reduces Steam Turbine Output • Impacts Condenser Sizing and Design • Increases Gas Removal System Size • Hydrogen Sulfide (H2S) Content N NOOTER/ERIKSEN E
  16. 16. Mahanagdong Vacuum System N NOOTER/ERIKSEN E
  17. 17. Sulfur Abatement System Iron chelate process converts H2S to elemental Sulfur N NOOTER/ERIKSEN E
  18. 18. Binary – Process Schematic N NOOTER/ERIKSEN E
  19. 19. Mammoth 1 BinaryFirst Air-Cooled Binary 1984 Air- N NOOTER/ERIKSEN E
  20. 20. Mammoth 2 Binary N NOOTER/ERIKSEN E
  21. 21. Binary Plant Design Challenges• Heat Exchanger Scaling• Summer/Winter Capacity• Safety Concerns• Wind Direction• Air Removal N NOOTER/ERIKSEN E
  22. 22. Geopressure Process N NOOTER/ERIKSEN E
  23. 23. Texas Geopressured Project N NOOTER/ERIKSEN E
  24. 24. Salton Sea Hypersaline N NOOTER/ERIKSEN E
  25. 25. Salton Sea Topping Turbine N NOOTER/ERIKSEN E
  26. 26. Plant Design Thermal Efficiency Versus Cost ($/kW) • Multiple Flashes • Heat Exchange Area • Binary Process Fluid • Equipment Types • Free Flowing Wells versus Pumped Wells N NOOTER/ERIKSEN E
  27. 27. Dual Flash N NOOTER/ERIKSEN E
  28. 28. Steamboat Geothermal Heat Exchangers N NOOTER/ERIKSEN E
  29. 29. Axial Flow Steam Turbine Rotor N NOOTER/ERIKSEN E
  30. 30. Radial Inflow Turbine Wheel N NOOTER/ERIKSEN E
  31. 31. Free-Free-Flowing Well N NOOTER/ERIKSEN E
  32. 32. Pumped Wells N NOOTER/ERIKSEN E
  33. 33. Questions?Mahanagdong Geothermal N NOOTER/ERIKSEN E

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