CAD-CAM - Energy generation

what 3 items are extracted through mining and drilling

oil, coal and gas

How do fossil fuels get converted into energy

fossil fuels are burnt, this heats up water and the superheated steam is sent towards a turbine which rotates and produces kinetic energy - electricity which is then sent to be used in our country

what is fracking

fracking involves drilling into layers of shale rock deep in the earth to release pockets of air

what 3 things are injected into fracking wells and why

sand, water and chemicals

force gas back up

name 5 renewable energy sources

wind

solar

tidal

biomass

hydroelectric

name 4 positives of wind turbines

low maintenance

clean energy

higher winter output

low cost energy

name 4 negatives of wind turbines

only works when windy

eyesore to some

hazard to birds

noise

what is the solar energy process

the sun produces a constant stream of solar energy that reaches earth

what are 3 advantages of solar energy

low maintenance

clean energy

relatively low-cost

what are 3 disadvantages of solar energy

seasonal fluctuations

no power generated at night

complex positioning issues

what is the photovoltaic cells process

light photons hit the PV cell which allows electrons to flow, creating an electric current

what is the tidal energy process

the rise and fall of the tide forces water through turbines which drive generators to produce electricity

what is a positive of HEP (hydroelectric power)

very reliable and controllable energy source

what are 2 negatives for HEP

set-up costs are financially and environmentally expensive

vast areas need to be flooded to create reservoirs

how do you create biofuel and biomass

burning organic matter

name 3 biomass fuels

food waste

farm waste

compost

why is biomass considered to be carbon neutral?

in theory, the carbon dioxide (CO2) released when it's burned is absorbed from the atmosphere by the plants that grew to become the biomass

how much of the worlds power is accounted for through nuclear power

11%

describe the type of energy provided by nuclear sources

abundant, reliable supply of clean energy