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ENERGY (Non-conventional electric power plant. (4.4. Biomass thermal power…
ENERGY
- Non-conventional electric power plant.
The main disadvantage of these power plants is that they generate much less energy, since they use diffuse energy sources
The ir advantages are that they contaminate much less than
conventional power plants, they use renewable sources and they reduce the energy dependence of petroleum and natural gas.
4.1. Wind power plants and wind farms These power plants use the kinetic energy uf the wind to move the blades of a rotor at the top of a tower, this is referred to as the wind turbine. Wind farms are a clean form of generating electnmty However, they can only be instafled in plat.es with appropnate wind conditions.
4.2. Solar power plants
Photovoltaic power plant
In these power plants, solar radiation is transformed directly into electncity by panels of photovoltaic cells.
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- electricity is the most widely used form of energy in industrialised societies for two reasons
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2.1. Electric power plants are facilities where pnmary or secondary energy is transformed into electnmty, Once electricity is generated, it must be transported to towns, cities or industrial parks.
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2.2. Transport and distribution of electrical energy Electric power plants are usually located far away from the points where the energy is used — fur safety reasons, space requirements or physical and geographical considerations Electricity cannot be stored; there fore, it must be transported to consumption centres This transport involves several processes:
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Increasing the voltage to 220 000 V or 400 000 V to significant energy loss, due to the Joule effect
Distribution to homes, offices, industnes and public faolities During this srage, the voltage is reduced to 230-400 V.
- Environmental impact he building and operating of an ejectncai power plant results in an ecological change in that region This is due both to the construction of the necessary infrastructure and the waste that this activity generates.
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5.3. Waste treatment
thermal power plants
Use coal with a low sulphur content, to reduce acid ram.
Ma intain and increase the size of large forested areas, since they absorb carbon dioxide.
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- Conventional electric power plants
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3.1 Nuclear power plants this type of plant imcludes a nuclear fission reactor that produrces th pressunsed steam needed to move the turbme rotor. Uranium ts the main fuel used.
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Energy sources (are natural resources from which we obtain different forms of energy that can be transformed for a specific use)
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By origin
primary
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Examples, crude oil, natural gas, coal, nuclear energy
and renewable energies
secondary
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Examples; electnaty, some petroleum denvatives
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By environmental impact
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Pollutants:
Sources that have negative effects on the environment,for example, they might generate by-products that severely pollute the enveronment
