Since the beginning of time, people have been fascinatedby the sun. Ancient civilizations personified the sun, worshipping it as a Godor Goddess .Farming and agriculture efforts have relied upon the sun’s rays togrow crops and sustain populations .Recently we have developed the ability toobtain the sun’s awesome power known as “Solar power” .
Solar power is theconversion of energy from sunlight either directly using photovoltaic’s (PV) celland transparent photovoltaic glass or as thermal energy to generate electricity. Theresulting technologies have promising implications for the future of renewableenergy and sustainability. It is the cleanest andgreenest source of renewable energy.The way of harnessing energy from the sun is throughphotovoltaic (PV) system. A photovoltaic system typically includesan array of photovoltaic panels, an inverter, a battery pack for storage,interconnection wiring, and optionally a solar tracking mechanism. PVpanels absorb the sunlight as a source of energy to generate electricity orheat.
Photovoltaic (PV) panel is a packaged, connect assembly of photovoltaic solarcells. Most solar panels are currently produced from crystallinesilicon (c-Si) and solar cells made of multi-crystalline and mono-crystalline silicon.Photovoltaic cells convert sunlight (photons) into electricity using thephotovoltaic effect.Solar energy is a renewable source of energy as it can beused to produce electricity as long as the sun exists. Solarenergy is an alternative for fossil fuels as it is non-polluting, clean,reliable and renewable source of energy. It does not pollute the air byreleasing harmful gases like carbon dioxide, nitrogen oxide or sulphur oxide.So, the risk of damage to the environment is reduced.
Solarpanels are easy to install and does not require any wires, cords or powersources. solar panels does not create any noise or release anytoxic substances .Solar energy is now used in photovoltaic power stations, rooftopsolar PV systems, solar vehicles, solar panels on spacecraftsand space stations.Solar power provides just 1% of total worldwideelectricity production. In 2010, the International Energy Agencypredicted that global solar PV capacity could reach 3,000 GW or 11% ofprojected global electricity generation by 2050—enough to generate 4,500 TWh ofelectricity. But the International Energy Agency projected in 2014 that underits “high renewable” scenario, by 2050, solar photovoltaic’s andconcentrated solar power would contribute about 16 and 11 percent,respectively, of the worldwide electricity consumption, and solar would be theworld’s largest source of electricity .The United Nations Development programin it’s 2000 world energy assessment found that the annual potential of solarenergy 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 atthe end of 2016.
Bangladesh is among those countries in which sun warmsthe surface throughout the year and therefore has a strong potential for solarpower generation. Bangladesh is starving for energy for last few decadessince its power generation is mainly depended on imported fossil fuel andnatural gas. Bangladesh has a strong potential of generating solarpower for her geographical position. In Bangladesh the long term averagesunshine data indicates that the period of bright sunshine hours in the costalregions varies from 3 to 11 hours daily.
These indicate that there are good prospectsfor solar thermal and photovoltaic application in our country. In some ruralareas of Bangladesh, people having no access to electricity, solar home systems(SHM) is introduced to provide electricity to households. As a climatevulnerable country, and for sustainable energy development and energy security,a Bangladesh solar mission needs to be designed fruitfully . Wecan dream of providing all the modern facilities to thousands of rural villagesthrough the next decade.
From the experiences of the last two decades,we can say that solar energy has become very familiar and accepted by thepeople of Bangladesh. Solar power is avirtually unlimited and inexhaustible resource (unlike power produced fromexpendable fossil fuels).The development of affordable, inexhaustible and cleansolar energy technologies will have huge, longer term benefits .It willIncreases countries energy security through reliance on an indigenous and ,mostly import-independent resource andthus enhance sustainability .