solar energy as power plants

1. Definition of Energy According to the Encarta Encyclopedia deluxe, energy is defined “energy, capacity of matter to perform work as the result of its motion or its position in relation to forces acting on it.”

          According to Sir Isaac Newton in a book entitled The Physics, energy
defined: “Ability to doing work”

2. Definition of Solar Energy

          According to Simon Roberts in his book Solar Electricity, Solar Energy is: “All the energy that reaches the earth from the sun. “

          According to the Encarta Encyclopedia Deluxe Solar Energy defined: "Solar energy is energy   provided by sun   from fusion reactions within the core sun.  "

3. Definition of Solar Sell

          According Drs. Muhaimin in his book Materials for Electrical Polytechnic solar cell are:
"A photovoltaic semiconductor material that converts the direct energy light into electrical energy."

          According to the Encyclopedia Deluxe Encarta Solar cell (solar cell) is defined as follows:

          “ Solar cells called photovoltaics made from thin slices of crystalline silicon, gallium arsenide, or other semiconductor materials convert solar radiation directly into electricity. “

4. Solar electric energy

          The energy of sunlight can be converted to electrical currents in the direction of using a thin silicon. Cylindrical crystal silicon Si obtained by heating it to pressure so that Si becomes conductor. When the cylindrical crystal was cut 0.3 mm thick, is formed of silicon cells, thin or also known as photovoltaic solar cells. Silicon cells were equipped with parallel/series Panel made of aluminium or stainless steel and is protected by a layer of glass or transparent plastic. Then, in every cell of connections with other cells, given the electrical connector. When cells are exposed to the sun then the connection is an electrical current will flow. Total current / power which depends on the amount of light energy that reaches the silicon and the surface area of ​​that cell.

          sun's rays consist of photons, if the sun hit the surface of the cell material (absorber), will be absorbed reflected or simply passed and only photons with a certain level of energy, which frees them from electron Atomic bonds, so that electric current. solar cells produce voltages from 0.5 to 1 volt depending on the intensity and semiconductors used substances. Meanwhile, the intensity of the energy contained in sunlight reaching the earth's surface the size of about 1000 Watts. But because the energy conversion efficiency of radiation into electrical energy by photovoltaic effect has just reached 25%, the maximum electricity production generated a new solar cell is around 250 watts per m2.

Solar energy is one energy that is being actively developed currently by the Government of Indonesia as a tropical country, Indonesia has the potential of solar energy is quite large. Based on solar radiation data collected from 18 locations in Indonesia, solar radiation in Indonesia can be classified respectively as follows: for the western and eastern Indonesia with the distribution of radiation in the Western Region Indonesia (KBI) about 4.5 kWh / m 2 / day with monthly variation of about 10%, and in Eastern Indonesia (KTI) of approximately 5.1 kWh / m 2 / day with monthly variations of about 9%. Thus, the average wind potential of Indonesia about 4.8 kWh / m 2 / day with monthly variations of about 9%.