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Jeff King Northwest Power and Conservation Council Portland, OR July 17, 2008

Sixth Northwest Conservation & Electric Power Plan Proposed Heavy-duty Combustion Turbine Planning Assumptions. Jeff King Northwest Power and Conservation Council Portland, OR July 17, 2008. Reference plant.

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Jeff King Northwest Power and Conservation Council Portland, OR July 17, 2008

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  1. Sixth Northwest Conservation & Electric Power PlanProposed Heavy-duty Combustion Turbine Planning Assumptions Jeff King Northwest Power and Conservation Council Portland, OR July 17, 2008

  2. Reference plant Twin 85 MW (nominal) natural gas-fired gas turbine generators and ancillary equipment, control building and switchyard. Inlet air evaporative cooling. Low-NOx combustors and water injection for NOx control. Characteristics generally based on GE Frame 7EA. July 17, 2008

  3. Heavy-duty GT applications: • Energy generation • Cogeneration (requires heat recovery & integration equipment) • Regulating reserve (requires AGC) • Load-following (requires AGC) • Spinning reserve (requires AGC) • Non-spinning reserve • Replacement reserve • Voltage control (VAR support) (requires clutch) • Black start (requires auxilliary diesel generator) • Local emergency service Status: Commercially mature July 17, 2008

  4. H. D. GT operating characteristics I July 17, 2008

  5. H. D. GT operating characteristics II July 17, 2008

  6. H. D. GT Costs (2006 dollar values) July 17, 2008

  7. Heavy-duty GT construction cost analysis • NPCC database contains reported construction cost for 7 WECC plants comprising 8 units, 2002-08 • Normalized capital cost using MICROFIN • Assume cost is vintaged as of beginning of construction (YOL - 1) • 2006 dollar values • "Overnight" construction + development cost • Nominal ISO capacity • Unit-weighted (we need an average cost value for a potential mix of plant configurations) July 17, 2008

  8. Normalized heavy-duty GT cost Proposed 2008 cost: $430/kW "Overnight", 2006$, 2009 service July 17, 2008

  9. Schedule, Cash Flows & Option phases July 17, 2008

  10. Environmental July 17, 2008

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