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Potential Energy
mass x gravity x height
power (w)
energy (J) / time (s)
Sustainability
Meeting the needs of the present without compromising the ability of future generations to meet their own needs.
Renewable Energy
Energy derived from natural resources that are replenished naturally over time
Non-renewable Energy
Energy derived from finite resources that will eventually run out
Energy
The capacity to do work.
Kinetic Energy
Energy of motion
potential energy
Stored energy due to position or state
Embodied Energy
The total energy required to produce a product, including raw material extraction, manufacturing, transportation, and disposal.
Fuel Efficiency
A measure of how much energy is converted to useful work.
1 kWh to J
3.6×106 J
1 kW
1000 W
1 MW
1 × 106 W
1 GW
1 × 109 W
Energy (KWh)
power (kW) x Time (hours)
fossil fuels
provide 60% of global electricity
hydropower
provides 15% of global electricity
wind and solar
together provide 10% of global electricity
nuclear
provides 10% of global electricity
an average coal power plant produces
500 to 2,000 MW
an average natural gas power plant produces
250 MW to 1,000 MW
an average nuclear power plant produces
500 MW to 1,500 MW
an average hydropower plant produces
several hundred MW
an average onshore wind turbine produces
2 to 5 MW
an average offshore wind turbine produces
8 to 15 MW
an average photovoltaic solar farm produces
hundreds of MW
an average geothermal power plant produces
a few MW to around 100 MW
an average biomass power plant produces
10 MW to 50 MW
energy gap
the risk that the electricity demand will sometimes exceed the supply if adequate plans are not implemented
life cycle analysis
what does the lifespan of a technology product look like, what happens when it can no longer be used
24kWh
1kW = 1000W
LED’s
more efficient than fluorescent bulbs with a longer lifespan
second-hand energy
wind power
third-hand energy
wave power
hotspots
areas with high geothermal activity
peak oil
the point when global oil production reaches its maximum rate, after which it will begin to decline irreversibly.
entropy
a measure of the quality of energy
toe
tonnes of oil equivalent
density of water
1000kg/m³
1 litre of water weighs
1kg
half life
The time taken for the radioactivity of a specified isotope to fall to half its original value.
atom used in nuclear fission
U (uranium) - 235
WEC’s
wave energy converters
