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Arizona’s Electricity Future: The Demand for Water

Arizona’s Electricity Future: The Demand for Water. Bill Wiley Senior Manager Eco-Efficiency and Technology Innovation APS. Groundwater. Colorado & Gila Rivers. Arizona’s Water Supply. Total statewide demand: ~7.2 maf/year 36% supplied by Groundwater pumping 52% supplied by

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Arizona’s Electricity Future: The Demand for Water

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  1. Arizona’s Electricity Future: The Demand for Water Bill Wiley Senior Manager Eco-Efficiency and Technology Innovation APS

  2. Groundwater Colorado & Gila Rivers Arizona’s Water Supply • Total statewide demand: ~7.2 maf/year • 36% supplied by Groundwater pumping • 52% supplied by Colorado & Gila River systems • Use of effluent is increasing – currently 12% Source: Rita Maquire Arizona Project WET Facilitator Training November 17, 2006

  3. Arizona Water Use by Major Category – 2005

  4. Arizona – A Dry & Growing State Arizona population growth (in millions) (2010-2025 figures projected)

  5. Arizona Water Usage – Historical

  6. AZ Population vs Energy Demand(1990-2005)

  7. Non-Hydro Annual Water ConsumptionAll Power Plants Supplying Arizona (2002-2006) From Pasqualetti & Kelley “The Water Costs of Arizona Electricity”

  8. Gallons per megawatt-hour Estimated Water Use by Plant Type

  9. AZ Water Use per Household • Avg Household uses ~ 293,000 gal/yr • Avg Household uses 14,000 kWh year ( or 14 MWh) • APS 602 gal/MWh avg • Less than 3% of annual household water used to meet household energy needs

  10. From Pasqualetti & Kelley “The Water Costs of Arizona Electricity”

  11. Future of Arizona and APS Are Inextricably Linked Arizona • Fastest growing state • Growth 3X U.S. Average • 95 Years Old • 52 People/Square Mile APS • Growth 4 X U.S. Average • 121 Years Old • 29 Customers/Square Mile Phoenix APS Retail Service Territory

  12. Use per Customer (kWhs/year) Customers APS Customers & Energy Use Increasing

  13. Year 2006 Water UseAPS Power Plants

  14. Water Use at APS Power Plants Acre-feet of water

  15. APS’ Ongoing Efforts to Reduce Water Usage • Continuing review of water use systems • Brine concentrators/crystallizer systems • Dry cooling plants • Hybrid cooling systems • Renewable technologies

  16. APS’ Projected Energy Demand Still needed DSM / Conservation Renewables 7,298 MW 2,563 MW

  17. What to Expect in the Future • In planning, expect more water usage, not less due to growth in energy demand • Renewable sources & conservation hold promise, but in the near term – water use will likely increase • Need to match quality with use when possible

  18. Conclusion Water & Energy Planning are Inextricably Linked Water Energy

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