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Energy 102 Electrical Energy
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Energy 101: The Basics Covered 8 Forms of Energy Primarily Chemical Energy
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Electrical Energy Secondary Form of Energy Can Not Exist on Its Own Must be Produced or Stored by Another Form
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Electrical Energy Not Static Electricity Electrons on the Move
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Primary Energy Forms Chemical Radiant Mechanical
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100 % Satisfaction Guarantee Five Times More Energy Educated
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Grading System Final Exam Class Participation
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Reliable Electrical Energy
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Early Telegraph Systems
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Powered Early Telegraph and Telephone Systems
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Alexandra Volta
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Voltaic Pile – Battery Invented 1800
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Zinc Gains 2 Extra Electrons Negative Copper Loses 2 Electrons Positive
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Batteries are Everywhere
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Storage Batteries Expensive Today
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Electric Car Batteries
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Photovoltaic Cell
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PV Cell Efficiency 7 % – 17 % Most of the Incoming Radiant Transformed into Thermal or Reflected
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Total 2012 U.S. Energy from PV Systems 0.1% Twice as Expensive as Natural Gas, Coal, or Nuclear
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Super PV Cells Cheaper to Manufacturer More Efficient Transforming Radiant Energy into Electrical Laws of Physics May Prevent or Allow
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Tracking the Sun 20% more in winter 50% more in summer
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Anti – Reflective Coating 33% absorption without coating 96 % absorption with coating
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99% of U.S. Electricity
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Primary Energy Forms for Electrical Energy Radiant and Chemical – 1% Mechanical – 99%
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Electrical Generator
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Michael Faraday 1791-1867
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Michael Faraday - 1831
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Joseph Henry 1797 - 1878
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Hand Generators
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Early Generators mid 1800s
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Thomas Edison
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Pearl Street Station, New York - 1882 85 Customers 400 Lamps
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Pearl Street Station New York – 1882-4 Customers 85-508 Lamps 400 - 10,164
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Electric Power – 40% 2012 U.S. Energy Demand
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Thermal Power Plants 2012 U.S. Electricity Production Coal – 42% Natural Gas – 25% Nuclear – 19% Petroleum – 1% Biomass 3% Geothermal 0.3%
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Spins 60 Times a Second in the Americas Most of the World - 50 cycles per second
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Energy Conversion Thermal Power Plants 1/3 to Electrical Energy 2/3 to Thermal Energy
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Cogeneration
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Hydroelectric Power – 4 % Up to 90% Efficient
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Wind Power - 3 % U.S. Electricity
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Turbine Efficiency Mechanical to Electrical Energy Average - 20% Perfect Wind Speed – 50%
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Electric Grid
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Alexander Volta André-Marie Ampere James Watt
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Low Amperage
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Higher Amperage
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1 Amp 6.2×10 18 Electrons per second
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Voltage – Push on Electrons
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Power = Voltage x Current P = VI Watts = Volts x Amps
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500 Watt Hair Dryer 500W = 120V x I I = 500W/110V I = 4.2A
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Electric Grid Output Voltage - 11- 25kV Power Output 100 - 1,400 MW
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7% Conversion into Thermal Energy Step up Voltage 10-30 times will Reduce Current 10-30 times Reduce Current by only 10 times Reduces Thermal Losses by 100
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Reduce Collisions Reduce Thermal Losses in Power Lines
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Transformers
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P = VI MW = (10)V (1/10)I 1/100 Thermal Energy Losses
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Electric Grid Step Up 10-30 Times to 138KV – 765 KV 11-25 KV
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Electric Grid
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120V and 240V 2400V
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Electric Grid
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Switching to Satellite
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Toast to Burning Coal Energy 102 Final Exam
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Thermal energy changes water into high pressure steam to turn a turbine and generator at 60 cycles per second.
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Generator Produces Electrical Energy 11KV – 25 KV
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To Reduce Thermal Losses Transformers Step Up Voltage 10-30 times Reducing Current 10-30 times
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High Voltage Transmission Lines
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Substation Steps Down Voltage and Increases Current
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Distribution Lines into Neighborhoods Above and Below Ground
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Once in the Neighborhood Stepped Down to 120V and 240V
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Transformation from Electrical Energy into Thermal and Radiant Energy
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Radiant and Chemical Energy Produce Chemical Reaction on Surface of the Bread
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Final Grade Quintuple or More – A Money Back Retake Energy 102
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Thank You, Energy 102 Instructors!
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