2671056
P3 - Sustainable Energy
- Energy transferred = Power X Time
- Power = Voltage X Current
- Efficiency = Energy usefully transferred/Total energy supplied X 100
- Energy is measured in joules
- Power is measured in watts (W) or kilowatts (kW)
- Sankey diagrams are just
energy transformation
diagrams
- The thicker the arrow,
the more energy it
represents - big thick
arrow going in
- Several smaller arrows going off
to show different energy
transformations taking place
- Arrows coming
down from the
original shows
wasted energy
- Efficiency = Useful
energy
output/Energy
input
- Several smaller arrows going off
to show different energy
transformations taking place
- The thicker the arrow,
the more energy it
represents - big thick
arrow going in
- Using cavity wall and loft
insulation, double glazing
and draught-proofing
reduces heat lost
- Energy saving light bulbs
saves energy
- Recycling,
and cycling
instead of
public
transport
saves energy
and money
- Non-renewable
sources
- Fossil fuels; coal,
oil, natural gas
- Nuclear
fuels
(uranium and
plutonium)
- They will
all run out
one day
- Damage the
environment
- Provide
most of our
energy
- Fossil fuels; coal,
oil, natural gas
- Renewable Sources
- Wind, waves,
tides,
hydroelectric,
biofuels,
geothermal,
solar
- Never run
out
- Less damage
to the
environment
- Don't
provide
much
energy
- Wind, waves,
tides,
hydroelectric,
biofuels,
geothermal,
solar
- Nuclear power stations - Energy is released
from the nuclear fuel by nuclear fission. - The
heat energy heats water to make steam. - The
steam turns a turbine. - A generator converts
the movement of the turbine into electricity.
- Irradiation - Being exposed to the
radiation without coming into contact
with the source
- Contamination - Picking up some radioactive
waste by breathing it in etc. More damage
- Contamination - Picking up some radioactive
waste by breathing it in etc. More damage
- National Grid is the network
of pylons and cables that
covers the whole of Britain
- Takes the electrical
energy from power
stations to our homes
- 230V is the
mains supply
voltage in
our homes
- Takes the electrical
energy from power
stations to our homes
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