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Long-term Strategies for Energy Utilities

Long-term Strategies for Energy Utilities. WSWC – WGA Water/Energy Workshop April 2, 2013. 8% Municipal. Self-supplied Industry. 2%. Self-Supplied Industry. 3%. 2004. 15% Municipal. 90% Agriculture. 2050. 82% Agriculture. Water/Energy Nexus – Colorado Context.

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Long-term Strategies for Energy Utilities

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  1. Long-term Strategies for Energy Utilities WSWC – WGA Water/Energy WorkshopApril 2, 2013

  2. 8% Municipal Self-supplied Industry 2% Self-Supplied Industry 3% 2004 15% Municipal 90% Agriculture 2050 82% Agriculture Water/Energy Nexus – Colorado Context • Self-supplied Industry • Thermoelectric generation (~ 50%) • Snowmaking • Sand/Gravel • Other large industry Avg. residential electric demand – 9.3 gallons per day, <6% Denver Water daily per capita water use in 2011. Source: Colorado Water Conservation Board, Statewide Water Supply Initiative, Denver Water

  3. Water Supply Strategy • Supply Diversity • Direct-flow/Storage • Self-supplied/contract supply • Native basin/trans-basin • Recycled wastewater • Supply Integration/Flexibility • Engagement

  4. Drought Resilience thru Cooperative Agreements • Municipal Agreements • Contract supplies • Trades • “Unique” arrangements • Agriculture Agreements • Interruptible Supply • Recharge Credits

  5. Northern Water LONGMONT Hydro Contract Poudre St. Vrain Clear Creek Storage Ag Ag DENVER GREELEY STERLING South Platte Storage Denver Water GLENWOOD SPRINGS

  6. Water Stewardship • Plant process improvement and reuse opportunities • Process wastewater for lime scrubbing • Process wastewater for bottom ash removal • Increased cooling tower cycles • Technology • Combined-cycle gas generation • Hybrid cooling • Recycled wastewater • Renewables • Demand-side management

  7. Water Usage at PSCo Generating Stations

  8. Future Trends and Water Use Impacts • Gas and combined cycle generation • Renewables • Emission controls • Carbon capture

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