PacifiCorp 2007 Integrated Resource Plan (May 30, 2007)

PacifiCorp – 2007 IRPChapter 5 – Resource OptionsIn March 2006, PacifiCorp responded with an expression of interest to Energy Northwest’s invitationto participate in the PMEC project. Energy Northwest is currently in active negotiationswith the two major technology consortia for the next stage of engineering and commercial efforts(Conoco-Phillips/Fluor/Siemens and General Electric/Bechtel), and the project is now goingthrough the Energy Facility Site Evaluation Council (EFSEC) review process. The state ofWashington recently passed Senate Bill 6001—climate change legislation that, among other provisions,implements a generation CO 2 emission standard of 1,100 lbs of CO 2 per MWh (or less)or permanent sequestration which meets the same level. Energy Northwest is currently evaluatingoptions that would allow the PMEC clean coal project to satisfy these emissions levels.PacifiCorp was recently selected by the Wyoming Infrastructure Authority (WIA) to participatein joint project development activities for an IGCC facility in Wyoming. The ultimate goal is todevelop a Section 413 project under the EPact. PacifiCorp will commission and manage feasibilitystudies with one or more technology suppliers/consortia for an IGCC facility at its JimBridger plant with some level of carbon capture. Alternate Wyoming sites may be considered.During this feasibility study stage, WIA will seek federal funding to support the next stage ofdevelopment, which would include a detailed Front End Engineering Design (FEED) study.In addition to the PMEC and Wyoming IGCC projects, PacifiCorp has also been in discussionswith a number of other proposed IGCC projects. These include Summit Power’s IGCC project atClatskanie, Oregon, Mission’s IGCC project at Wallula, Washington, and Xcel’s IGCC projectin Colorado.Finally, PacifiCorp actively participates in the Electric Power Research Institute’s CoalFleet program.CoalFleet is a major utility and technology supplier-sponsored initiative to accelerate development,demonstration, and deployment of IGCC. PacifiCorp is a member of the GasificationUser’s Association. In addition, PacifiCorp communicates regularly with the primary gasificationtechnology suppliers, constructors, and other utilities.Natural GasNatural gas generation options are numerous and a limited number of representative technologiesare included in the supply-side resource options table. Simple cycle and combined cycle combustionturbines are included as well as distributed generation and CHP systems which are discussedbelow.Combustion turbine options include both simple cycle and combined cycle configurations. Thesimple cycle options include traditional frame machines as well as aero-derivative combustionturbines. Two aero-derivative machine options were chosen. The General Electric LM6000 machinesare flexible, high efficiency machines and can be installed with high temperature SCRsystems, which allow them to be located in areas with air emissions concerns. These types of gasturbines are identical to those recently installed at Gadsby and West Valley. LM6000 gas turbineshave quick-start capability (less than 10 minutes to full load) and higher heating value heatrates near 10,000 Btu/kWh. Also selected for the supply-side resource options table is GeneralElectric’s new LMS-100 gas turbine. This machine was recently installed for the first time in acommercial venture. It is a cross between a simple-cycle aero-derivative gas turbine and a framemachine with significant amount of compressor intercooling to improve efficiency. The ma-99