lecture 35 november 20
DESCRIPTION
Lecture 35 November 20. ECEN2060 Frank Barnes. 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, - PowerPoint PPT PresentationTRANSCRIPT
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Lecture 35 November 20
ECEN2060Frank Barnes
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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
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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
32
22 THg
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Systems for Extracting Energy from Waves
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Variations Wave Shapes and Heights
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Distributions of Wave Heights and Periods.
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Wave Power Available in kWh/m/yrNear San Francisco
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Wave Energy Estimates
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Variations in Wave Power with Time of Year
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Wave Power Results for a 1MW Generator in kW
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Annual Energy MWh/yr for Site Near San Francisco
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Wind and Wave Generators Colocated off Shore
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Two Tidal Generators.
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Tides and Position of the Moon
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Variations with Time of Year
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Variation of Tides
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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=(ρAVm
3)
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Common Mixed Tidal Currents Over a Day
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Cut In and Rated Speed
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Surface Tidal Speed Probability Distribution Tacoma Narrows
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Estimated Energy Delivered For a Turbine Rated at 600kW
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Hydropower Run of the River
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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.
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Power Plant
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Conversion Factors
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Pelton Turbine
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Angle Drive Propeller Reaction Turbine
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Net Head after Friction Loss
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Friction Head Loss vs Flow Rate for Small Pipes
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Weir For Measuring Flow
• 1. Q = 1.8 (W- 0.2h)h1.5(m3 /s)
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Electrical Block Diagram for Micro Hydro System
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Pumped Hydro System
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Raccoon Mountain
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Raccoon Mountain
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Two Penstock Pumped Hydro System
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Biomass Gasification Process
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Geothermal Plants
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Binary Geothermal System