"Solar" is the Latin word for "sun" - and is a powerful source of energy. In fact, sunlight shining on the Earth in one hour could meet global energy demand for an entire year!
We can use solar energy in two ways: as a heat source, and a source of energy. People have used the sun as a heat source for thousands of years. Families in ancient Greece built their houses to get the most sunlight during the cold winter months.
Where does solar energy come from?
The sun has produced energy for billions of years. Solar energy is the solar radiation that reaches the earth.
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Solar energy can be converted directly or indirectly into other forms of energy, such as heat and electricity. The main drawbacks (problems
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Photovoltaic cells, like batteries, generate direct current (DC) which is generally used for small loads (electronic equipment). When DC from photovoltaic cells is used for commercial or sold to electric utilities using the electric grid applications, which must be converted into alternating current (AC) power converters using semiconductor devices that convert DC into the mains. PVS historically they have been used to provide electricity in remote locations. However, a market for distributed PV generation can grow with the unbundling of transmission and distribution costs due to electricity deregulation. The implementation of numerous small-scale generators in electricity distribution feeders could improve the economy and reliability of the distribution …show more content…
Heat results when photons, packets of light energy, hit the atoms that compose a substance (water, your body, asphalt), exciting them. Solar thermal technologies include passive solar systems for heating buildings (or cooling!); solar collectors, often used to provide hot water for homes; systems and concentrating solar power.
Solar energy
These systems, also known as solar thermal power plants use the sun 's heat to produce steam, which then turns a turbine and generates electricity. (Fossil fuel power plants also generate electricity by first creating steam to drive a turbine.)
The main applications of solar thermal energy at present are the pool heating, domestic water heating and space heating of the building.
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To this end, the general practice is to use solar-dishes sensors with fixed orientation (position).
When space heating is the main consideration, the highest efficiency with fixed flat-plate collector is achieved if it faces south and slopes at an angle to the horizon equal to the latitude plus 15 degrees.
Solar energy
Solar collectors fall into two general categories: nonconcentrating and