30-07-2014, 10:48 AM
RENEWABLE ENERGY SOURCE
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Carbon neutral
CO2 ultimately released in energy generation is recently captured and so ideally does not change total atmospheric levels
Carbon leaks can result in a net increase in CO2 levels
Sequestration in soil can result in a net decrease in CO2 levels
HYDRO ENERGY
Hydro-power or water power is POWER derived from the ENERGY of falling water and running water, which may be harnessed for useful purposes.
Kinetic energy of flowing water (when it moves from higher potential to lower potential) rotates the blades/propellers of turbine, which rotates the axle.
The axle has a coil which is placed between the magnets.
When the coils rotate in magnetic field it induce them in the coil due to change in flux. Hence, kinetic energy of flowing water is converted to electrical energy.
Fossil Fuels
Steam Reforming of Natural Gas
Combination of methane and steam produces hydrogen gas
Carbon monoxide is also produced
The “water gas shift” reaction can produce further hydrogen from the carbon monoxide. Carbon dioxide is produced too.
Most economical; main current method
Carbon sequestration one method to reduce CO2 emission
All around us we see machines doing work. For example, planes, trains, and automobiles carry us along roads, over land and sea, or across town. These machines require fuels to function.
They burn gasoline, natural gas, jet fuel, diesel, propane, or other fuels in their engines.
Fuels are portable energy sources. By burning them, we can harness their energy to do work.
Sometimes we simply burn fuels out in the open, such as wood in a campfire. In industrialized countries like the United States, it is more common to burn fuels in specialized machines such as furnaces.
Many machines we're familiar with don't seem to use fuel, though. Think about washing machines, electric stoves, and air conditioners. These use electrical energy rather than burning a fuel. But where does the electric power come from?Electricity comes from fuels. Usually a fuel such as coal, oil, or gas is burned at a power plant to boil water for steam. The steam spins turbines to produce electrical energy, which in turn powers the machines in your home.
Advantages
Renewable
Easy to exploit in some cases
CO2 production less than with fossil fuels
High net energy yield
Disadvantages
Not available everywhere
H2S pollution
Produces some water pollution (somewhat similar to mining)