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Electricity Supply in Alaska

Electricity Supply in Alaska

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Electricity Supply in Alaska

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  1. Electricity Supply in Alaska Frank Abegg, PE Fairbanks, Alaska April 2006

  2. ` Utilities 1,778 MW Industry 822 MW Defense 181 MW Total 2,781 MW Alaska’s Electric Generating Capacity

  3. ` Alaska’s Electric Capacity Utility & Non-Utility

  4. Installed Electric Utility Capacity (1960 - 1995)

  5. ` Types of Power Generating Facilities in Alaska

  6. Alaska Electric Utilities Map

  7. Utility Power Output - 1995 (GWH/Year)

  8. Electric Utility Transmission Grid Electric Supply Alternatives for Industry in Alaska • On Site Generation • Central Power Plant • Cogeneration Option (Heat and Power)

  9. Electric Transmission Grid in Southcentral & Interior

  10. Electric Transmission Grid in Southeast

  11. Distribution Tap ( 4 MW Load) • 12 kV Line ~ $75,000 to $100,000/mile • Transmission Tap (up to 40 MW) • 69 kV Line~ $250,000 to $300,000/mile • Construction Time: Up to 5 years • Permits: Right-of-Way (EA or EIS) • Low Cost Financing ($/kWh) Electric Utility Grid Connection

  12. Anchorage & Fairbanks $0.11/kWh • Juneau $0.10/kWh • Nome $0.15/kWh • Tok $0.23/kWh • Ft. Yukon $0.28/kWh • McGrath $0.36/kWh Electric Utility Commercial Power Cost

  13. Diesels On-Site Power Options • Combustion Turbines • Steam Turbines • Alternative Energy • Wind, Hydro • Emerging Technology • Fuel Cells, Micro-Turbines

  14. 2,000 kW Diesel Trailer Module

  15. 3,600 kW Diesel Generator

  16. Diesel Power Plant • Size = 5 kW to 10,000 kW • Installation Cost = $200 to $400/kW • Operation & Maintenance • Fuel Options - Natural Gas or Fuel Oil • Fuel Use = up to 16 kWh per gallon • Heat Recovery Option • Permitting = General Permit or… • PSD & BACT Possible (1- 2 years minimum)

  17. Combustion Turbine with Cogeneration (Heat and Power)

  18. Combustion Turbine Plant • Size = 3 MW to 90 MW • Installed Cost: $700 to $1,200/kW • Operation & Maintenance • Fuel: Natural Gas to Heavy Oil • Fuel Use: Up to 13 kWh/gallon • Cogeneration & Comb. Cycle Option • Permitting: Construction & Operating • PSD & BACT Required (2 years)

  19. Steam Turbines

  20. Steam Turbine Plant • Size Range = 3 MW to 200 MW • Installed Cost: $1,500 to $4,000/kW • Operation & Maintenance • Fuel: Solid, Liquid, Gas • Cogeneration: Up to 70% Efficient • Permits: Construction & Operating • PSD and BACT Required (1-2 years)

  21. Alternative Energy - Wind

  22. Alternative Energy - Wind

  23. Alternative Energy - Wind • Site Wind ~ 15 mph (Average) • Installed Cost ~ $2,500/kW • Operation & Maintenance • Avg. Output: 25% of Rated Capacity • Wind/Diesel Hybrid Option

  24. Cooper Lake Dam

  25. Alternative Energy - Hydro • Cost: $3,000 to $5,000/kW • Bradley Lake 120 MW @ $385 million • Old Harbor 500 kW @ $ 2.5 million • Available Watershed • Mountain Lake (High Head) • River (Low Head) • Permits: FERC Licensing

  26. Emerging Technology - Fuel Cells

  27. Emerging Technologies - Fuel Cells • Commercial Size ~ Up to 250 kW • Installed Cost = $5,000/kW • Operation and Maintenance • Fuel: Natural Gas • Cogeneration: Up to 60% Efficient • Expected Operating Life ~ 50,000+ hours

  28. Capstan 30 kW Micro Turbine

  29. Emerging Technologies – Micro Turbines • Commercial Size ~ Up to 30 kW • Installed Cost ~ $3,500/kW • Operation and Maintenance • Fuel: Natural Gas • Efficiency: 25% • Cogeneration: Up to 50% Efficient • Expected Operating Life ~ 12,000+ hours

  30. Plan Ahead: Permits & Construction • Profile: Electricity and Heating Load • Define Criteria: Reliability, Life, etc. • Identify: Power Supply Alternatives • Evaluate: Life Cycle Costs • Initial Investment, Cost of Capital • Fuel Supply, Operation & Maintenance Power Supply Selection Process