Solar energy is our earth's core source of
renewable energy since generating electricity directly from sunlight
does not deplete any of the earth's natural resources and supplies the
earth with energy continuously.
Photovoltaic devices produce electricity when
sunlight strikes them. Electricity generation relies upon chemical.
When sunlight strikes a PV cell, chemical reactions release electrons,
thus generating electric current. Using PV is a cheaper option than
new electric lines for providing power to remote locations.
Solar Power Plants - generates electricity when
the heat from solar thermal collectors is used to heat a fluid to
produces steam that is used for power generation. Use the sun's heat
to generate steam to drive an electric generator.
Solar cells collect and distribute sunlight to
provide illumination. This technology replaces artificial lighting.
Solar lights charge during the day and light up at dusk. These are a
common sight along walkways.
The best part about PV system is they operate
without producing air, water or solid wastes. However, manufacturing
these cells involve generation of some hazardous material.
When constructed as grid-connected systems, they
require considerable amount of land, which can impact existing
ecosystems. On the other hand, most PV panels are installed on
buildings forming a distributed system that use little or no land.
Similarly solar-plants generate zero air
emissions, though some emissions are created during manufacture. Water
used for solar thermal plants is extensive.
disadvantages of solar energy
The amount of sunlight that arrives at the
earth's surface varies. It changes from location to location, season
to season, weather conditions.
The sun is not constant at delivering that much
energy to any one place at any one time. Because of which a large
surface area is required to collect the energy at a useful rate.
The Future of
Solar energy technology is undergoing significant
growth in the 21st century. More research, more architects and common
man are recognizing the value of solar energy and learning how to
effectively incorporate it into building designs. Solar hot water
systems compete efficiently with conventional systems in some areas.
As costs of solar PV continue to decline solar systems will be adopted
increasingly in the markets.
the solar industry continues to expand, there will be occasional
roadblocks in the road. However these problems will come to an end and
solar energy will play an integral role in ending dependence on fossil
fuels. Thus bring an end to the threat of global warming, and assuring
a future based on clean and sustainable energy.