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Non-conventional source of energy
Energy:
"Energy is the capacity of a body to do work." Conventional sources of energy: Conventional energy sources are: (a) Fossil fuel energy (b) Hydraulic energy (c) Nuclear energy Non-Conventional energy sources: The inexhaustible and renewable sources of energy which are being produced continuously in nature are called non conventional sources of energy.They are abundant in nature.They do not produce environmental pollution and they donot require heavy expenditures to produce energy.If they are utilized well,they can help in overcoming energy crisis because of their cheap availability. The main non-conventional sources of energy are: 1. Wind Energy 2. Solar Energy 3. Tidal Energy Wind energy: Two factors are responsible for causing winds.Firstly,wind is caused by absorption of solar energy on the surface of earth and in the atmosphere.Secondly,the rotation of earth about its axis and its motion around the sun causes winds. Wind power helps in pumping water,grinding grain and producing electricity.A wind mill harnesses wind power and converts kinetic energy of moving air into mechanical energy that can be further used in producing electricity or running a machine. A consistent windflow is necessary for an effective wind system.The basic wind energy conversion device is the wind turbine. The production of energy by wind has both advantages and disadvantages. Advantages: Its advantages are,
Disadvantages: Its disadvantages are,
Solar Energy: The energy which comes from sun is called solar energy.The sun is the most abundant,inexhaustible and universal source of energy.In fact all other sources of energy are dependent on sun.The sun produces energy by nuclear fusion reaction that takes place deep in it.When hydrogen nucleus fuses into helium nucleus,the output energy of these reactions flows out from the sun and escapes into the space.All life on earth is dependent upon solar energy. Solar energy is often called as radiant energy as there are many kinds of radiant energy emitted by sun.For example,e light infrared rays,Ultra violet rays and X- Rays. Solar energy can be converted into electrical energy by means of photo voltaic effect.Photo means "light" and voltaic means "electric" so it is the conversion of light or other electromagnetic radiation in to electricity.
Disadvantages:
Tidal Energy: Tide is periodic rise and fall of the water level of the sea under the influence of gravitational pull of moon and sun.Tides can be used to produce electrical power which is also known as tidal power.Dams or Barrages are constructed in such a way that the basin is filled during high tide and emptied during low tide.The Potential energy of the water stored in the basin is used to drive the turbine which then generates electricity . There are three main Components of a tidal Power plant. i.e, (i) The Power house (ii) The dam or barrage (iii) Sluice-ways from the basins to the sea and vice versa. Advantages:
Disadvantages:
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The Following User Says Thank You to Farrah Zafar For This Useful Post: | ||
candidguy (Sunday, May 20, 2012) |
#2
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madam
wind is caused by absorption of solar energy on the surface of earth and in the atmosphere Secondly,the rotation of earth about its axis and its motion around the sun causes winds the bold word seems doubtul can you plz mention the reference |
#3
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Quote:
2- Coriolus Force-It doesn't generate winds but does determine their direction. |
The Following 3 Users Say Thank You to candidguy For This Useful Post: | ||
Farrah Zafar (Monday, May 21, 2012), Hamidullah Gul (Monday, May 21, 2012), mano g (Wednesday, May 23, 2012) |
#4
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wind cause is not due to motion of earth aroud sun it is very much clear sir
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#5
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@ farrah
i wanted to know how much these figures are useful in paper? and should we make thee figures in our answer sheet?
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"There is difference between imitating a person and counterfeiting him" |
#6
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oh yeah. u must draw figures in answer copy. they are very much important.
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"pattering your life around others opinion is nothing more than slavery" |
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Mushtaq Ahmed (Sunday, May 20, 2012) |
#7
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Quote:
Winds are caused because of two factors. 1. The absorption of solar energy on the earth’s surface and in the atmosphere. 2. The rotation of the earth about its axis and its motion around the Sun. Here is link, http://bieap.gov.in/Nonconventionalenergysourses.pdf
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The Following User Says Thank You to Farrah Zafar For This Useful Post: | ||
azzee (Monday, May 21, 2012) |
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