From the ancient time, people have been fascinated by the
sun. Ancient civilizations expressed the sun as the supreme power, worshipping
it as a God or Goddess .Farming and agriculture efforts have depended upon the
sun’s rays to grow crops and provender .Recently we have developed the ability of
obtaining sun’s energy called “Solar power” . Photovoltaic’s (PV) system
regenerate solar energy of sunlight into solar power for electricity generation. The
resulting technologies have promising implications for the future of renewable
energy and sustainability. It is the cleanest and
greenest source of renewable energy.
We can harness energy from the sun using photovoltaic system. A PV system has an inverter,
photovoltaic panels, battery pack for storage, interconnection wiring. PV
panels absorb the sunlight as a source of energy to generate electricity.
Photovoltaic (PV) panel is a packaged, connect assembly of photovoltaic solar
cells. Most solar panels are currently produced from crystalline
silicon (c-Si) and solar cells made of multi-crystalline and mono-crystalline silicon.
Photovoltaic cells convert sunlight (photons) into electricity using the
Solar energy is a renewable source of energy as it can be
used to produce electricity as long as the sun exists. Solar
energy is an alternative for fossil fuels as it is non-polluting, clean,
reliable and renewable source of energy. It does not pollute the air by
releasing harmful gases like carbon dioxide, nitrogen oxide or sulphur oxide.
So, the risk of damage to the environment is reduced. Solar
panels are easy to install and does not require any wires, cords or power
sources. solar panels does not create any noise or release any
toxic substances .Solar energy is now used in photovoltaic power stations, rooftop
solar PV systems, solar vehicles, solar panels on spacecrafts
and space stations.
Solar power provides just 1% of total worldwide
electricity production. In 2010, the International Energy Agency
predicted that global solar PV capacity could reach 3,000 GW or 11% of
projected global electricity generation by 2050—enough to generate 4,500 TWh of
electricity. But the International Energy Agency projected in 2014 that under
its “high renewable” scenario, by 2050, solar photovoltaic’s and
concentrated solar power would contribute about 16 and 11 percent,
respectively, of the worldwide electricity consumption, and solar would be the
world’s largest source of electricity .The United Nations Development program
in it’s 2000 world energy assessment found that the annual potential of solar
energy was 1,575-49,837 EJ. Worldwide growth of photovoltaic’s has averaged 40%
per year from 2000 to 201333 and total installed capacity reached 303 GW at
the end of 2016.
Bangladesh is among those countries in which sun warms
the surface throughout the year and therefore has a strong potential for solar
power generation. Bangladesh is starving for energy for last few decades since
its power generation is mainly depended on imported fossil fuel and natural gas.
has a strong potential of generating solar power for her geographical position.
In Bangladesh the long term average sunshine data indicates that the period of
bright sunshine hours in the costal regions varies from 3 to 11 hours daily.
These indicate that there are good prospects for solar thermal and photovoltaic
application in our country. In some rural areas of Bangladesh, people having no
access to electricity, solar home systems (SHM) is introduced to provide
electricity to households. As a climate vulnerable country, and for sustainable
energy development and energy security, a Bangladesh solar mission needs to be
designed fruitfully . We can dream of providing all the modern
facilities to thousands of rural villages through the next decade. From
the experiences of the last two decades, we can say that solar energy has
become very familiar and accepted by the people of Bangladesh.
Solar power is a
virtually unlimited and inexhaustible resource (unlike power produced from
expendable fossil fuels).The development of affordable, inexhaustible and clean
solar energy technologies will have huge, longer term benefits .It will
Increases countries energy security through reliance on an indigenous and ,mostly import-independent resource and
thus enhance sustainability .