Solar
energy is energy created by the heat and light of the sun. Solar power is
produced when this energy is converted into electricity or used to heat air,
water, or other substances.

             Sun is the ultimate source of solar
energy. The energy from the sun is directly converted into electrical energy
with the help of solar cells. Solar cell is also known as photovoltaic cell
that converts light energy into electrical energy by the photovoltaic effect. A
solar cell when exposed to light generates electric current. This electric
current can be used to light bulbs or motors. Collection of solar cells is
called solar panel. These solar panels not only produce electricity but also
store the energy for future use.

          Photovoltaics were initially solely
used as a source of electricity for small and medium-sized
applications, from the calculator powered by a single
solar cell to remote homes powered by an off-grid rooftop PV system.
Commercial concentrated solar power plants were first developed in the 1980s.
The 392 MW Ivanpah installation is the largest
concentrating solar power plant in the world, located in the Mojave Desert
of California.

             As the cost of solar electricity
has fallen, the number of grid-connected solar PV
systems has grown into the millions and utility-scale solar
power stations with hundreds of megawatts are being built. Solar PV is
rapidly becoming an inexpensive, low-carbon technology to harness renewable
energy from the Sun. The current largest photovoltaic power station in the
world is the 850 MW Longyangxia Dam Solar Park,
in Qinghai, China.

 

             This form of energy is environment friendly as
compared to the fossil fuels. The solar cells do not release anything into the
atmosphere that can create pollution. Solar electricity is
cheaper than any other form of electricity. They save a considerable amount of
money. Sun is the
consistent power source, so one needs not to worry about solar energy getting
depleted. Sun is available all the days. Solar panels require very little
maintenance, so one has not to spend money on its maintenance. Once installed
they will start generating electricity immediately. Solar energy is the
cleanest form of energy as it does not create noise pollution.

 

                   Solar power includes plants with among
the lowest water consumption per unit of electricity (photovoltaic), and also
power plants with among the highest water consumption (concentrating solar
power with wet-cooling systems).Photovoltaic power plants use very little water
for operations. Life-cycle water consumption for utility-scale operations is
estimated to be 12 gallons per megawatt-hour for flat-panel PV solar. Only wind
power, which consumes essentially no water during operations, has a lower water
consumption intensity. Concentrating solar power plants with wet-cooling
systems, on the other hand, have the highest water-consumption intensities of
any conventional type of electric power plant; only fossil-fuel plants with
carbon-capture and storage may have higher water intensities. A 2013 study
comparing various sources of electricity found that the median water
consumption during operations of concentrating solar power plants with wet
cooling was 810 ga/MWhr for power tower plants and 890 gal/MWhr for trough
plants. This was higher than the operational water consumption (with cooling
towers) for nuclear (720 gal/MWhr), coal (530 gal/MWhr), or natural gas (210).A
2011 study by the National Renewable Energy Laboratory came to similar
conclusions: for power plants with cooling towers, water consumption during
operations was 865 gal/MWhr for CSP trough, 786 gal/MWhr for CSP tower, 687
gal/MWhr for coal, 672 gal/MWhr for nuclear, and 198 gal/MWhr for natural
gas.The Solar Energy Industries Association noted that the Nevada Solar One
trough CSP plant consumes 850 gal/MWhr.The issue of water consumption is
heightened because CSP plants are often located in arid environments where
water is scarce.

 

                     Observing all the pros and
cons of solar power system the pros are the winner.It has too much advantages
than demerits.it is a good alterbnative of fossile fuel and a renewable eternal
energy source that can keep our earth havitable for a long time and make our
live comfortable.So,in order to save our future generation from severe
pollution we have to take it as the permanent source of power.

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