Sources of Energy :
Classification of sources of Energy
There are two types of sources of
energy:-
(1) Renewable sources of energy: Those source of energy which is inexhaustible
that is which can be replaced as we used them and can be used to produce energy
again and again, are called Renewable sources of energy.
This energy is available in an unlimited amount in nature.
E.g:- Solar energy, water
energy, wind energy, geothermal energy, etc….
Advantages of Renewable source of
energy:-
• The source will remain until the
earth will be revising light from the sun.
• This source is available free in
nature.
• The source does not produce any
type of pollution.
(2) Non-Renewable sources of energy:-
Those sources of energy which are exhaustible and cannot be replaced once they
have been used is called non-renewable sources of energy.
E.g:- coal, petroleum and natural gas, etc.. are also
called fossil fuels.
Disadvantages of Non-renewable sources
of energy:-
• It has been exhausting due to
excess use.
• This source of energy pollutes the environment on a large scale.
Classification of Source of Energy on the Basic of Time
Conventional source of energy:-
Those source of energy which is extensively and meets a major person of our energy requirement is called a conventional source of energy.
E.g:- fossil fuels, biomass, etc...
Non-conventional source of energy
:- Those sources of energy which are not
used as extensively and meet our energy requirement only one a limited scale is
called Non- conventional source of energy.
E.g:- Solar energy, Wave energy,
Geothermal energy, Wind energy, etc…
Fossil fuel:- Fossil fuel is
the carbon-containing substance which found from the remains of the organism
(plant & animal) that lives millions of years ago and where buried deep in
the interior of the earth.
E.g:- Coal (fossil of big
plant), Petroleum( fossil of small plants and animals).
Biomass:- The material contained
in the bodies of plants and animals is called Biomass.
Biogas:- The mixture of
methane(CH4) , carbon dioxide (CO2), hydrogen(H2)
and hydrogen sulfide (H2S) is called Biogas.
NOTE:- The main component of
biogas is Methane ( 65% or 75% )
Fuels:- The substance which
produce heat energy by burning or oxidation in the air is called fuels.
E.g:- Coil, wood, Kerosene,
Diesel, Petrol, Cooking gas (L.P.G).
( L.P.G is good fuels )
Also Read:
Also Read:
Calorific Value of Fuel:- when one gram fuel burn in the
presence of oxygen or air then the amount of heat involved in kilojoules is
called the calorific value of that fuel.
Fuel | Calorific value | ||
---|---|---|---|
Dung cakes (uple) | 6 – 8 KJ/g | ||
Wood | 17 KJ/g | ||
Coal | 25 – 30 KJ/g | ||
Charcoal | 33 KJ/g | ||
Alcohol (ethanol) | 30 KJ/g | ||
Diesel (fuel oil) | 45 KJ/g | ||
Kerosene oil | 48 KJ/g | ||
Petrol | 50 KJ/g | ||
Biogas | 35 – 40 KJ/g | ||
Natural gas | 33 – 50 KJ/g | ||
Cooking gas (L.P.G ) | 50 KJ/g | ||
Methane | 55 KJ/g | ||
Hydrogen gas | 150 KJ/g | ||
Ignition Temperature:- The minimum temperature at which any fuel
starts to burn is called the ignition temperature of that fuel.
Characteristics of an Ideal Fuel or Good Fuel:
- It should be easily available in plenty.
- It should a high calorific value.
- It should be cheap.
- It should be easy to handle and transport.
- It should have a low moister contain.
- It should have moderate combustion.
- It should have moderate ignition temperature.
- It should not have much ash.
- It should not cause pollution.
- It should have a moderate combination which can be easily started and stopped as desired.
Pollution:- The
addition of unwanted and harmful material to water, land, and air is called
pollution.
Hydroelectricity:- The
electricity produced by the kinetic energy of flowing water is called Hydroelectricity.
Hydroelectric or Hydro-power Plant:- A plant which generates electricity on a large
scale from flowing water is called a hydroelectric power plant.
Flowing water is an important
source of energy.
Advantages of Hydro Energy:
• The source of hydro energy is free and renewable.
• Harnessing the energy of flowing water is a pollution free
process with no smoke, chemicals, etc.. being produced.
• The cost of electricity generation is low as compared to
electricity generated from other types of power plants.
• Flowing water is a more renewable source of energy than wind
energy.
• Hydroelectricity can be generated on a large scale from a
single plant.
• Dams built for hydroelectricity plants also help in flood
control and irrigation.
A Disadvantage of Hydra Energy:
• Large hydroelectric power plants are expensive to build.
• Not all rivers and not all areas are suitable for
hydroelectric power generation.
• Dams built for large hydroelectric plants submerge a large
area of land under water.
Wind Mill:- A windmill is a
machine and devices which convert wind energy into mechanical energy or
electrical energy.
Disadvantage/Limitation of wind
Energy:
• A wind generator works only one wind or a least 15 km/ hour.
• It is a dependable source of energy because some time the air
is absolutely still and at other times these are strong.
• It is expensive to set up wind from generating electricity
because wind forms need a large area.
Solar Energy:- The energy
related by the sun in the form of heat and light is called solar energy.
Solar Constant:- The energy
received from the sun in one second by the unit square meter area of the outer edge
of Earth's atmosphere exposed perpendicular to the radiation of Sun at an average distance between the earth and the sun is called solar constant.
The value of solar
constant is 1.36 KJ/second-m2
or 1.36 kW/m2.
Solar Cooker:- It is a device which is used to cook food by
utilizing the heat energy radiation coming from the sun.
There are mainly two types of solar cooker:
- Box-type solar cooker
- Concave reflector type of solar cooker
Solar Cells:- A device which directly converts solar energy
into electrical energy is called solar cells.
A simple solar cell
consists of a sandwich of a “silicon-boron” layer and a “silicon-arsenic” layer.
[ Give 0.7 w current
]
Solar Panel:- A group of solar
cells connected in certain pattern to produce described potential difference is
called solar panel.
Uses of Solar Cells:
• In artificial satellites.
• Operating traffic signals, watches, calculators and toys.
• Radio and TV station.
Geothermal Energy:- Geothermal energy is the heat energy from hot
rocks present inside the Earth.
Geothermal energy is one of the few sources of energy that
do not come directly or indirectly from solar energy.
Ocean Thermal Energy:- The energy available due to the difference in
the temperature of water at the surface of the ocean and at dipper levels is called
Ocean thermal energy.
The Ocean thermal energy can be converted into a useable form
energy like electricity.
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All the Best !!
Team Fast2study
Team Fast2study
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