Solar Cells or Photovoltaic Energy
We can also modification the sunlight straight to energy using solar cells.
Solar cells are also titled photovoltaic cells - or PV cells for clipped - and can be found on some teensy
appliances, like calculators, and even on spacecraft. They were first developed in the 1950s for use on U.S. space satellites. They are made of silicon, a special type of melted sand.
When sunlight strikes the solar cell, electrons (red circles) are knocked loose. Solar cells into arraysThey move toward the treated front surface (dark blue color). An electron imbalance is created between the front and back. When the two surfaces are joined by a connector, like a wire, a current of electricity occurs between the negative and positive sides.
Solar Thermal Electricity
Few solar knowledge plants, equivalent the one in the show to the proper in Calif.'s Mohave Calif., use a highly recurved mirror called a story exchequer to pore the light on a pipage squirting felled a important
point above the curve of the mirror. The mirror focuses the sunlight to strike the pipe, and it gets so hot that it can boil water into steam. That steam can then be used to turn a turbine to make electricity.
In California's Mojave desert, there are huge rows of solar mirrors arranged in what's called "solar thermal power plants" that use this idea to make electricity for more than 350,000 homes. The problem with solar energy is that it works only when the sun is shining. So, on cloudy days and at night, the power plants can't create energy. Some solar plants, are a "hybrid" technology. During the daytime they use the sun. At night and on cloudy days they burn natural gas to boil the water so they can continue to make electricity.
Solar Hot Water
In the 1890s solar irrigate heaters were state victimized all over the Consolidated States. They proven to be a big betterment over club and coal-burning stoves.
Artificial gas made from coal was available too to heat water, but it cost 10 times the price we pay for natural gas today. And electricity was even more expensive if you even had any in your town!
Many homes used solar water heaters. In 1897, 30 percent of the homes in Pasadena, just east of Los Angeles, were equipped with solar water heaters. As
mechanical improvements were made, solar systems were used in Arizona, Florida and many other sunny parts of the United States. The picture shown here is a
solar water heater installed on the front roof of a house in Pomona Valley, California, in 1911 (the panels are circled above the four windows).