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Arizona’s Electricity Future: The Demand for Water

Explore the intersection of water and electricity in Arizona, with insights on usage trends, conservation efforts, and projected demands. Learn about APS's strategies to reduce water usage and prepare for future challenges related to energy growth and resource conservation.

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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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