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SOLAR ENERGY

SOLAR ENERGY. Daniel Khan 607.

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SOLAR ENERGY

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  1. SOLAR ENERGY Daniel Khan 607

  2. Solar energy is the sun’s rays (or solar radiation) that reaches the Earth.For millions of years the radiant energy from the sun has powered life on Earth. This energy can be converted into other forms of energy, such as heat and electricity.There are many different types of solar energy systems that will convert the solar resource into a useful form of energy. This is a block diagram showing three of the most basic system types :

  3. Why Solar Energy is Renewable: Solar energy is a renewable source of energy because every day the Sun comes up and we can harness its energy every day.

  4. When converted to thermal (or heat) energy, solar energy can be used to: • Heat water — for use in homes, buildings, or swimming pools • Heat spaces — inside homes, greenhouses, and other buildings • Heat fluids — to high temperatures to operate a turbine to generate electricity

  5. Solar energy can be converted to electricity in two ways: • Photovoltaic (PV devices) or “solar cells”change sunlight directly into electricity. Individual PV cells are grouped into panels and arrays of panels that can be used in a wide range of applications ranging from single small cells that charge calculator and watch batteries, to systems that power single homes, to large power plants covering many acres. • Solar Thermal/Electric Power Plants generate electricity by concentrating solar energy to heat a fluid and produce steam that is used to power a generator. In 2009, there were 13 solar thermal-power generating units operating in the United States, 11 in California, 1 in Arizona, and 1 in Nevada.

  6. Advantages of solar power: • Solar energy can be used for heating and cooling. • It is a renewable source using a range of ever-evolving technologies. • Solar energy systems do not produce air pollutants or carbon-dioxide and does not cause global warming. • Once they are build solar panels are inexpensive to run.

  7. Disadvantages of solar energy are: • Because the sun doesn't deliver that much energy to any one place at any one time, a large surface area is required to collect the energy at a useful rate. • Solar panels are expensive to make. • You can only place solar panels in certain places because the amount of sunlight that arrives at the Earth's surface is not constant. • Sometimes weather conditions can block the Sun’s rays from arriving to solar panels.

  8. REFERENCES • Energy Kids - US. Energy Information Administration • Chapter 1 from a web site www.powerfromthesun.net • Microsoft Office Clip Art Collection • Wikipedia

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