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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