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energy resources and electricity generation (nuclear power (uses a boiler,…
energy resources and electricity generation
wind energy
wind can be used to turn turbines and generators to make electricity :smiley:
wind turbines don't take up much space - it's just tall :smiley:
free :smiley:
land can still be used for farming :smiley:
renewable :smiley:
only works in windy places :cry:
many turbines needed
noisy :cry:
unattractive/ unsighty :cry:
water
hydroelectric energy
when water runs down a hill its kinetic energy can turn a turbine to generate electricity
energy is free :smiley:
quick for demand :smiley:
can be used to store energy from other sources :smiley:
can only b used in wet, hilly areas :cry:
floods large areas
the lake can silt up in time :cry:
renewable :smiley:
tidal energy
converts energy from tides into electricity. Tidal water can be trapped behind a barrier, like a dam can be used like hydroelectricity :smiley:
Whenever there are tides, free energy is provided :smiley:
the barrier can also be used as a causeway across the estruary :smiley:
needs a place with high tides:cry:
affects the ecology of the area :cry:
very expensive to build:cry:
renewable :smiley:
wave energy
waves are caused by the wind. The movement of floats can be used to generate electricity :smiley:
whenever there are waves, energy is free :smiley:
it only works in places where there are usually big waves :cry:
many kilometres of floats needed :cry:
high maintenance cost :cry:
renewable :smiley:
geothermal resources
heat beneath earth using pumps
heat from below the surface of the earth
can be used for power stations or just simple pumping systems :smiley:
to collect the heat, run hundreds of metres pumping beneath the surface. The pipes fill with water and push through cold water
some of it comes from magma
meaning it's boiling and hard to collect. :cry:
only available where hot rocks are near the surface :cry:
renewable :smiley:
solar energy
solar panels collect heat and energy to produce electricity :smiley:
energy from the sun will never run out :smiley:
solar panels have 3 layers - a glass layer to trap the layer of air, copper water pipes in a circle, on the outside is black rubber, inside is the copper. Last layer is insulation - traps heat
extremely expensive :cry:
only works when it's sunny :cry:
takes up a lot of space :cry:
renewable :smiley:
fossil fuels
disadvantage: non-renewable :cry:
disadvantage: produces acid rain :cry:
disadvantage: produces greenhouse
gases contributing to global warming :cry:
advantage: contracted energy source :smiley:
advantage: reliable energy source :smiley:
advantage: can be built anywhere :smiley:
advantage: no radioactive waste :smiley:
nuclear power
uses a boiler
energy is converted from nuclear energy
to heat energy, to kinetic energy & finally electrical energy
expensive to build and maintain :cry:
nuclear reactors
takes longer to start up than fossil fuel fuel reactors :cry:
radioactive waste :cry:
they can become old and inefficient and have to be shut down :cry:
processing uranium causes pollution :cry:
risk of radioactive material leaking :cry:
doesn't produce any greenhouse gases :smiley:
plenty of uranium left in the ground :smiley:
non renewable :cry:
biomass (biofuel)
plant, especially fast growing trees, can be grown for fuel :smiley:
cheep way to get warm :smiley:
it's free :smiley:
natural waste products :smiley:
air pollution
doesn't work if it isn't sunny :cry:
renewable :smiley:
