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what are the advanatges of all renewable resources
they are renewable
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what are the disadvanatges of all renewable resources
though there are no fuel costs with renewables , the energy is dilute so that the capital cost of the generating equipment is high
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biomass/biofuels can be used to produce ..... ....
thermal energy
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biomass a renewable energy source , is :
- biological material derived from living or recently living organisms
- It is similar to fossil fuels , which are derived from long dead biological material . Biofuels include waste material , ethanol , methane , wood , straw , nutshells and woodchip
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how do waves produce electricity
waves use the rise and fall of water to drive turbines , the turbines are connected to generators , which transfer kinetic energy into electrical energy
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what are the advantages of using wave power to generate electricity
- there is no pollution
- they can be very useful on small remote islands
- there are no fuel costs and running costs are minimal
- renewable
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what are the disadvanatges of using wave power to generate electricity
- they spoil the view
- they can be a hazard to boats
- they are fairly unreliable , since winds tend to die out when the waves drop
- intial costs are high
- large quantities of moving material are needed to match the energies obtained by burning fossil fuels
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what are the tides driven by
the gravitational force between the earth and moon
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what are tidal barrages
they are big dams built across river estuaries , with turbines in them
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what is a tide mill
a device which uses the tide to create electricity
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what are tide mills used for
they are used to obtain energy
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explain how tidal barrage would work
- as the tide comes in water flows through the sluice gates and fills in a reservoir
- water is trapped behind a barrage
- as the tide flows out the water behind the barrage is at a higher level than the sea
- this water is allowec to escape via turbines to produce electricity that is supplied to the national grid
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what are the advantages or tidal barrages
- they dont cause any pollution
- there are no fuel costs
- the running costs are minimal
- tidal barrages are excellent for storing energy ready for periods of peak demands
- tidal power has the potential for generating a significant amount of energy
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what are the disadvantages of using tidal power to generate electricity
- few areas are suitable
- using energy from tides involves building barrages across river estuaries
- tidal estuaries and mud banks would be changed upsetting the balance of wildlife living in the areas
- tidal schemes are very expensive to set up
- the amount of electricity produced by tidal barrages depends on the state of the tide , which varies during each day , and the height of the tide , which varies both on a monthly and yearly cycle
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