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Irrigation Hardware

Irrigation Hardware. Proposed Adoption of Deemed Savings Regional Technical Forum January 5 th , 2010. Pictures: ETO. Background. Deemed savings were originally approved by the RTF in September 2005. Scale of the Measures

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Irrigation Hardware

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  1. Irrigation Hardware Proposed Adoption of Deemed Savings Regional Technical Forum January 5th, 2010

  2. Pictures: ETO

  3. Background • Deemed savings were originally approved by the RTF in September 2005. • Scale of the Measures • About 1 aMW and $1,000,000 in CRC credits were claimed in the 2007 and 2008. • Idaho Power claimed 1.87 aMW at a cost of $1.6 million in 2007 and 2008 for its “menu” option. • The RTF reviewed deemed savings in July 2009 • Original savings based on engineering estimates, but the RTF did not have the supporting calculations/information on the original savings estimates • RTF subcommittee established to: • Review/revise deemed savings estimates with documentation of assumptions • Recommend in-field studies/evaluations to true-up estimates

  4. Background: The Existing Measures

  5. 8 gpm 17 gpm 1.7 gpm 10 gpm Source: Utah State University

  6. The RTF Subcommittee • Meetings • October 19th, 2009 • November 4th, 2009 • December 16th, 2009 • December 21st, 2009 Members • Brad Miller (BPA) • Bruce Cody (RTF) • Dennis Merrick (IPC) • Danielle Gidding (BPA) • Hallie Gallinger (PacificCorp) • Jim Williams (RTF) • Mike Darrington (IPC) • Tom Osborn (BPA) • Quentin Nesbitt (IPC) • Dick Stroh (BPA) • Ted Light (ETO) • Adam Hadley (RTF) • Rick Rumsey (Rocky Mt Pwr) Summary of Recommendations • Revised deemed savings values • Documented engineering estimates • Input assumptions based on: • Available studies • Experience of the group • Based on literature review , technology, and experience of the group, the subcommittee believes the engineering calculations and savings estimates are appropriate • No specific field studies were identified • Revise Measure Costs

  7. Available Studies • Farm and Ranch Irrigation Survey (2003), Volume 3, Special Studies, Part 1 • US Department of Agriculture • Issued November 2004. • An Evaluation of Wheelmove Irrigation Systems Nearing the End of Practical Life in the Uintah Basin of Utah • Robert Hill ,et al, Utah State University • May 8, 2007 • Evaluation of low pressure center pivots, stationary laterals, spray losses, and reservoir tillage • Dennis C. Kincaid (Kimberly , Idaho) • Leak Prevention • Dorrel C. Larsen, University of Idaho • January 1991 • Nozzle Management and Leak Prevention for Sprinkler Irrigators • D. C. Larsen and T. S. Longley (University of Idaho) • Feb 1981 • Irrigation Uniformity • Bradley A. King, Jeffrey C. Stark, and Dennis C. Kincaid (University of Idaho)

  8. Deemed Savings – Method and Major Assumptions

  9. Inputs – Continued

  10. Baseline Factor Assumption • Issue: These are mostly maintenance/repair measures so it’s difficult to determine a consistent baseline leakage level or application uniformity. • Some farmers are already performing this maintenance on their own in a timely manner • In this “market segment”, the baseline is a good components, so baseline leakage level would be near zero. • Other farmers are waiting to perform the maintenance • In this “market segment”, the baseline is a leaky system, savings would be 100% of estimate for the estimated life (5 years in most cases). • Many farmers in-between • Proposed Solution: Baseline Factor set at 75% • Assumes the program participants consist of • 25% - farmers who regularly maintain their system • 75% - farmers who have not maintained their systems on their own • This assumption is supported by irrigation equipment dealers reporting that sales have increased for listed measures included in utility programs

  11. Results

  12. What we need from the RTF: • A decision regarding the deemed savings, measure life, and costs: • Approve, Deny, Modify, Table, …? • Acknowledge that each utility should adjust savings estimates based on unique characteristics (i.e. pumping lift, hours of operation) of service territory

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