Electrical Energy. Electrical Charges Electrical Charges and Current Like charges attract, unlike...

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Transcript of Electrical Energy. Electrical Charges Electrical Charges and Current Like charges attract, unlike...

  • Slide 1
  • Electrical Energy
  • Slide 2
  • Electrical Charges Electrical Charges and Current Like charges attract, unlike charges repel. Coulmbs Law
  • Slide 3
  • Electric and Hydraulic Analogy CurrentFlow rate VoltageElevation BatteryPump MotorWater wheel
  • Slide 4
  • Series and Parallel Circuits Series Same current passes through all devices If one device fails, all fail Parallel Currents add up Devices work independent of each other Fire Hazard
  • Slide 5
  • Units ChargeC CurrentA VoltageV Resistance Energy kWh Power W, kW, MW, GW
  • Slide 6
  • Power Table 1. Power Consumption For Several Household Appliances* AppliancePower, WAppliancePower, W Clock Radio Television (color) Freezer/Refrigerator Hair Dryer Washer (clothes) Vacuum Cleaner Home Computer 2 70 - 400 65 - 200 600 - 1000 1200 - 1800 350 - 500 1000 - 1400 100 - 400 Air Conditioner Coffee Maker Iron Dishwasher Toaster Microwave Oven Dryer (clothes) Oven range 800 - 1000 900 - 1200 1200 - 2400 850 - 1400 800 - 1400 750 - 1100 1800 - 5000 10000 - 12000
  • Slide 7
  • Generation of electricity Thermal Powerplants Solar Photovoltaics Thermophotovoltaics Electrically Conductive Plastics Fuel Cells
  • Slide 8
  • Slide 9
  • Principle of Operation Electrolysis H2O + electric current H2+1/2 O2 Fuel Cells H2+1/2 O2 H2O +electric current
  • Slide 10
  • Generation
  • Slide 11
  • Storage Battery (chemical energy) Ultracapacitor (static energy) Flywheel (rotational energy)
  • Slide 12
  • Batteries Batteries are devices that produce electric potentials Primary batteries Secondary batteries Batteries are characterized by: Electrical potential Capacity
  • Slide 13
  • Transmission To reduce power loss we must reduce current P=RI 2 To reduce current we must transmit power at very high voltages (Since voltage is constant) P=V.I
  • Slide 14
  • Transmission Grid
  • Slide 15
  • Load and Capacity Base load Peak load Average load Capacity Factor Optimal Size
  • Slide 16
  • Load Duration