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Solar energy


blazer 360

on 21 September 2012

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Transcript of Solar energy

By Simon Solar energy What is solar panels?
What is solar panels made of?
The purposes of solar panels
solar facts
solar facts cont Contents Solar energy means using the energy of sunlight to make electricity for our homes and for businesses or factory industry.
Solar is clean, renewable source of energy . It is a sustainable source so it can last forever. Solar energy is the solar radiation that reaches the earth. What is Solar energy? Solar panels are made out of solar cells. Solar cells use sunlight to produce electricity. solar cells are made from photovoltaic cell. Solar panels is made of slabs of semi-conductor metal. The slabs are polished and glossed before doping. After that a thin layer of glass is put on top of the solar cells slabs After that an anti-reflective coating is usually applied over the solar slabs to reduce the amount of sunlight lost. what is solar panels made of? Solar panels work by the sunlight. Solar cells make solar panels. There are different purposes of solar panels. Individual cells are used for powering small hand held devices such as a calculator. Photovoltaic arrays (which are made of many interconnected solar cells) are used for satellites, remote radio telephones and water pumping application. The purposes of solar panels It would take only around 0.3 per cent of the world's land area to supply all of our electricity needs via solar power.
•The area of roof space available in Australia is enough to provide all of the nation's electricity, using solar panels.
•Weight for weight, advanced silicon based solar cells generate the same amount of electricity over their lifetime as nuclear fuel rods, without the hazardous waste. All the components in a solar panel can be recycled, whereas nuclear waste remains a threat for thousands of years.
•Solar and wind power systems have 100 times better lifetime energy yield than either nuclear or fossil energy system per tonne of mined materials
•The amount of energy that goes into creating solar panels is paid back through clean electricity production within anywhere from 1.5 - 4 years, depending on where they are used. This compares with a serviceable life of decades.
•The theoretical limit for silicon based solar cells is 29% conversion efficiency. Currently, polycrystalline and monocrystalline solar panels generally available have efficiencies anywhere from 12% to 18%. With the addition of solar concentrators, The efficiency of photovoltaics is eventually likely to rise above 60 per cent.
•The Earth receives more energy from the sun in an hour than is used in the entire world in one year
•Wind is a form of solar power, created by the uneven heating of the Earth's surface. solar facts •At the end of 2007, worldwide capacity of wind turbines in operation was just over 94 gigawatts
•Solar radiation and related energy resources including wind and wave power, hydro and biomass make up 99.97% of the available renewable energy on Earth
•By the end of 2007, the total installed capacity of solar hot water systems globally was approximately 154 gigawatts
•The first solar cell was constructed by Charles Fritts in the 1880s
•The world's largest wind turbine is currently the Enercon E-126 with a rotor diameter of 126 meters. The E-126 produces 6 megawatts, enough to power approximately 5,000 European households.
•In 2008, Europe leads the world in development of offshore wind power.
•Germany has nearly half the world's installed solar cell capacity, thanks to a generous feed in tariff program. In 2006, the country installed 100,000 new solar power systems
•Global annual photovoltaic installations increased from just 21 megawatts in 1985, to 2,826 megawatts in 2007
•Solar energy prices have decreased 4% per annum on average over the past 15 years
•In 2007, wind power made up 40 percent of new generating capacity installations in Europe and 35 percent in the USA.
•Manufacturing solar cells produces 90% less pollutants than conventional fossil fuel technologies
•The solar industry creates 200 to 400 jobs in research, development, manufacturing and installation for every 10 megawatts of solar power generated annually.

solar fact cont
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