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Re-Tasking Spent Hybrid Vehicle Batteries as Peak Load Shavers

Re-Tasking Spent Hybrid Vehicle Batteries as Peak Load Shavers. Gregory D Carlson Energy and Earth Resources Jackson School of Geosciences University of Texas at Austin. 00. 01. 02. 03. 04. 05. 06. 07. 08. 09. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24.

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Re-Tasking Spent Hybrid Vehicle Batteries as Peak Load Shavers

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  1. Re-Tasking Spent Hybrid Vehicle Batteries as Peak Load Shavers Gregory D Carlson Energy and Earth Resources Jackson School of Geosciences University of Texas at Austin

  2. 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Motivation to Store Power GAS / OIL / DIESEL GAS GAS Demand (MW) Marginal Cost ($/MW) COAL NUCLEAR HYDRO In PJM, the Brattle Group determined that reducing the peak demand by 0.9% dropped the market price of power 5-8%. University of Texas at Austin

  3. Power Storage University of Texas at Austin

  4. Storage – Efficiency Source: http://www.ElectricityStorage.org University of Texas at Austin

  5. Storage – Costs Source: http://www.ElectricityStorage.org University of Texas at Austin

  6. Hybrid Vehicle Batteries - Prius • Chemical Composition - NiMH • Capacity – 6.5 Ah, 201.6 V (1.95kWh) • Size - 0.02 cubic feet • Weight – 99lbs • Modules - 28 • Useable Life – 1500-2000 cycles in vehicle usage (translates to 6-12 years) • Cost – Almost free since they are being discarded University of Texas at Austin

  7. Pros Cheap Point of Use High number (failure is probabilistic) Small size (relatively) No additional land requirement Cons No clear vendor Not very efficient (50-70%) Pros/Cons of Hybrid NiMH University of Texas at Austin

  8. PHEV – HEV – EV Projections • Over 600,000 hyrbids in US right now • Hybrid market share is increasing • EV/PHEV battery size versus HEV • EV and PHEV battery packs will be similar chemical composition initially, but much larger • Next Gen Batteries – Li-Ion vs NiMH • Li-Ion have higher energy density, but lower life expectancy – may not be good for this application University of Texas at Austin

  9. References • “Quantifying Demand Response Benefits in PJM,” Brattle, 2007. • “Potential for DR, EE, and Onsite RE to Meet Texas’ Growing Need,” ACEEE 2007. • http://photography4therestofus.wordpress.com/batteries/ • http://batterydata.com/ • http://www.toyota.com • http://science.howstuffworks.com/question247.htm • http://auto.howstuffworks.com/question219.htm • http://en.wikipedia.org/wiki/Grid_energy_storage University of Texas at Austin

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