Physics - Energy Resources
- Created by: salterl
- Created on: 28-02-17 16:44
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- Energy Resources
- non renewable energy resource
- an energy resource which can't be replenished.
- fossil fuels
- oil
- coal
- slowest start up time
- base load
- the most polluting of the 3
- slowest start up time
- gas
- quickest start up time
- convenient when sudden demand
- the least polluting of the 3
- quickest start up time
- non renewable
- they are non renewable because it takes a long time for tissue to be decomposed into fossil fuels like millions of years
- hydrocarbons
- fossil fuels are expected o run out in 50 years time which means we will be dependant on other energy resources
- they are non renewable because it takes a long time for tissue to be decomposed into fossil fuels like millions of years
- nuclear power
- more energy per Kg compared to fossil fuels.
- electricity generated from nuclear fission from uranium and plutonium. this releases radioactive waste which is expensive to dispose of.
- has a slow start up time so is used for the base load of energy.
- renewable energy resource
- wind
- the kinetic energy of the wind turns a turbine which turns a generator to create electricity
- no fuel costs
- not always reliable
- noise pollution
- the kinetic energy of the wind turns a turbine which turns a generator to create electricity
- solar
- sunlight can be used to produce electricity. this can be done using a solar cell.
- no fuel costs
- doesn't work in the dark
- expensive to install
- inefficient and only harvesting around 10% of the sun energy
- hydroelectric power (HEP)
- a dam is built to hold back a reservoir but lets water pass through to turn turbine. this turns a generator to make electricity.
- reasonably reliable
- reduces the flow of the river. if a drought occurs the reservoir could dry up
- ethical issues as people could rely on the river which is being used for HEP
- if their is a drought a reservoir could dry up
- a pumped reservoir is when water is pumped up to ta reservoir when there is left over electricity and released at high demand
- geothermal
- hot water is pumped up through the ground. this creates steam to spin a turbine and then a generator.
- no fuel costs
- does't rely on the weather
- costly
- only works were the crust is thin
- saftey
- any thermal energy extracted from the rocks is replenishes by physical processes
- biomass
- food waste, wood chips or something similar are burnt to create steam. this turns a turbine which consequently turns a generator to create electricity.
- it's reliable
- carbon neutral and replenishable
- ethical issues of burning food that people could eat when they are starving
- wave
- the kinetic movement of the waves turn a turbine to turn a generator. this creates electricity.
- free after been set up
- no fuel costs
- could affect the tidal flow and biodiversity
- there could be a period of time where there is few waves which could lead to less energy being released
- tidal
- A dam is built to let water in at high tide and out at low tide. consequently it turns a turbine to produce electricity from a generator
- reliable happens twice a day all days
- from the moon will never change
- not to expensive
- affects river estuaries and the habitats
- can be replenished as it is being used
- wind
- non renewable energy resource
- advantage
- advantage
- disadvantage
- disadvantage
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