Lecture 35 November 20 - PowerPoint PPT Presentation

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Lecture 35 November 20

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  1. Lecture 35 November 20 ECEN2060 Frank Barnes

  2. Home works • Home work, Wednesday Nov. 20th • 7.1, 7.2, 7.3, 7.4, 7.5 • Home work for Monday Dec 2, 2013 • 7.7,7.10,7.11, 7.12, 7.13 • Also plan on getting started on your term paper. • Home work for chapter 8 Friday Dec 6, • 8.1,8.5.8.6, 8.8, 8.10,8.11

  3. Energy In a Wave • The power in a sine wave with Height H and period T • P= • For H =3m and T=8sec • P= 70.5kW/m • Note the density of water is ρ 1,025kg/m3

  4. Systems for Extracting Energy from Waves

  5. Variations Wave Shapes and Heights

  6. Distributions of Wave Heights and Periods.

  7. Wave Power Available in kWh/m/yrNear San Francisco

  8. Wave Energy Estimates

  9. Variations in Wave Power with Time of Year

  10. Wave Power Results for a 1MW Generator in kW

  11. Annual Energy MWh/yr for Site Near San Francisco

  12. Wind and Wave Generators Colocated off Shore

  13. Two Tidal Generators.

  14. Tides and Position of the Moon

  15. Variations with Time of Year

  16. Variation of Tides

  17. Velocity of Tidal Currents and Available Power ~ v3 • 1. Note Betz limit applies at 59.3% to the fraction of the power that can be used of the half sine wave P=(ρAVm3)

  18. Common Mixed Tidal Currents Over a Day

  19. Cut In and Rated Speed

  20. Surface Tidal Speed Probability Distribution Tacoma Narrows

  21. Estimated Energy Delivered For a Turbine Rated at 600kW

  22. Hydropower Run of the River

  23. Power Plant • 1. Potential energy from ΔH and kinetic energy from v2 energy head = z + • Z= height P = pressure • γ= Specific Weight v = velocity • g = gravitational constant.

  24. Power Plant

  25. Conversion Factors

  26. Pelton Turbine

  27. Angle Drive Propeller Reaction Turbine

  28. Net Head after Friction Loss

  29. Friction Head Loss vs Flow Rate for Small Pipes

  30. Weir For Measuring Flow • 1. Q = 1.8 (W- 0.2h)h1.5(m3 /s)

  31. Electrical Block Diagram for Micro Hydro System

  32. Pumped Hydro System

  33. Raccoon Mountain

  34. Raccoon Mountain

  35. Two Penstock Pumped Hydro System

  36. Biomass Gasification Process

  37. Geothermal Plants

  38. Binary Geothermal System