P3 - Sustainable Energy
- Created by: eloisa_braith
- Created on: 17-05-15 14:30
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- P3 - Sustainable Energy
- Electrical energy
- Power = how fast it transfers energy from the charge passing through it
- Measured in watts (W) / kilowatts (KW)
- Energy transferred(J) = power (W) x time (S)
- Kilowatt-hour = amount of energy converted by a 1KW appliance left on for 1 hour
- Energy transferred (KW-H) = power(KW) x time(H)
- Cost = no. of (KWH) x cost per (KW-H)
- Appliances with a high power rating draws a large current
- Power(W) = voltage(V) x current(A)
- Efficiency = (energy usefully transferred ----------- total energy supplied) x 100%
- Power = how fast it transfers energy from the charge passing through it
- Saving energy
- Buy efficient appliances
- Installing insulation
- Switching things off
- Energy saving light bulbs
- Double glazing
- Effective = saving most money each year
- Cost effective = depends on timescale
- Cost effective = depends on timescale
- Sankey diagrams
- Efficiency of generation
- electrical energy from generator --------- energy input from coal
- Efficiency of distribution
- useful electrical energy output --------- electrical energy from generator
- Overall efficiency
- useful electrical energy output --------- energy input from coal
- Efficiency
- useful energy output ------------ energy input
- Efficiency of generation
- Nuclear energy
- energy released from nuclear fuel by nuclear fission
- Heat energy heats water to make steam
- Steam turns a turbine
- Generator converts turbine movement into electricity
- Steam turns a turbine
- Heat energy heats water to make steam
- Irradiation - being exposed to radiation
- Contamination - picking up radioactive waste
- Release a lot of energy
- Produces radioactive waste
- energy released from nuclear fuel by nuclear fission
- Power stations
- Fuel burned in a boiler & used to generate steam
- Steam turns a turbine
- Generator converts movement of turbines into electricity
- Steam turns a turbine
- Fuel burned in a boiler & used to generate steam
- Wind & solar energy
- Solar
- Initial costs are high but energy is free & no running costs
- Wind
- Spoil view
- Very noisy
- No power when the wind stops
- Solar
- Wave & tidal power
- Wave
- Waves directly turn turbines on the shore which drives a generator
- Both drive turbines directly rather than making steam to drive turbines
- Tidal
- Tides come in and fill up estuary which drives turbines
- Both drive turbines directly rather than making steam to drive turbines
- Wave
- Generators & the National Grid
- Voltage & currents can be made in a conductor by moving a magnet in a coil of wire
- Electromagnetic induction
- As the magnet moves the magnetic field changes
- Movement induces the voltage which causes a current to flow in the coil
- Move magnet faster to increase voltage & current
- Movement induces the voltage which causes a current to flow in the coil
- National Grid
- Network of pylons & cables that cover the whole of Britain
- Voltage & currents can be made in a conductor by moving a magnet in a coil of wire
- Electrical energy
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