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Energy:
Energy comes in many forms
for example: Kinetic, Potential etc.
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Energy:
Energy comes in many forms
for example: Kinetic, Potential etc.
Energy can be easely transformed
and can be also lost by a sistem
whenever there is a trasformation
Non Renewable Resources:
The Earth contains lots of mineral
resources that can be easely extracted and manufactured to produce energy. We have also radioactive minerals that can be concentrated, and the energy they produce can be harnessed to produce energy
Oil:
oil is formed from the remains of algae and zooplancton that were settled down at the bottom of seas and lakes, then they were buried from a layer of nonporouse sediment.
The process of creation of Oil is so slow that is considered non-renewable
Oil and Natural gas can be normally found in the same resevoirs, they are both mixtures of hydrocarbons.
The main difference between this two is that in oil the carbon chains are composed of 5 or more C atoms, in gases instead we have hydrocarbons that have a chain that in composed from 4 and below C atoms
conventional oil and non-conventional: the non-conventional oil are oils that can't be extracted in the normal way
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cost of barrels:
the main parameter that is considered is the ratio of energy consumed to energy gained
Extreme oil:
the increasing of the oil's price and new developments in technology has made oil fields that were once unreachable viable
Oil extraction is associated with a number of environmental issues, even before considering its transportation and use. Drilling for oil on land risks froundwater pollution, oil spills from drilling offshores affect was areas, anche the mining of oil sands and oil shales destroys thousands of hectares of boreal forests
Nuclear Power:
Nuclear power produce the 5% of the world's energy production and so the 14% of the world's electrical energy. The nuclear centrals are now only composed of fission reactors. They began to be developed in the 50's, and now we have 400 nuclear reactors trough the world, however the costs and the high profile accidents delined their popularity.
COAL:
Coal is formed from remains of plant material that were buried in shallow shamps during the carboniferous period. Coal is used to produce one third of the world's energy production and it is used for both industrial and domestic purposes
Extraction
Surface Mining (when the coal bed is near to the surface):
The overburden is removed from heavy machinery. The coal is extracted in strips, the new strips are then filled with the overburden
causes disturbance to the enviroment.
The land itself is disturbed by the mining.
the land can be regenerated but this doesn't often happen
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Renewable Resources: There has been a steady decrease in easily obtainable non-renewable energy resources and a steady rise of their costs. Coupled with these the enviromental consequences has created a strong public demand for renewable, environmentally friendly resources.
Wind power: wind power is one of the most common method of producing energy. Now it is mainly used to produce electrical energy. Wind Power is becoming more and more relevant in generating energy but wind is a variable energy provider. This can be easily seen when wind power produce the 20% of the World's energy
Hydroelecticity: Hydroelectricity accounts the 20% of global electricity production. Electricity is produced by utilizing the kinetic energy contained in the moving water. The larger the volume of water and further it has to fall, the greater the amount of energy it contains. This energy is then transformed into electrical energy by moving a turbine.The production of energy has no CO2 emissions but the building of the dam requires massive amount of energy
Solar Power: The energy reaching the Earth from the sun correspond to trillions upon trillions of joules per day, far more than all of Humanity uses in an entire year. This energy can be harnessed to produce electricity. The most used method consist on heating a fluid (with concentrated sunlight) that after moves through a turbine and this generates energy
Geothermal Power: Geothermal power station operate where volcanic activity heats groundwater to steam
Ocean Power: this is a "new" developed method of producing energy, it consists in capturing the kinetic energy contained in the sea waves