I was first introduced to solar energy in the movie, Race the Sun with James Belushi and Halley Berry in the lead. It was a story about low income and reach Hawaii students encouraged by their teacher to participate in Solar Car Race. In the film, formed a car like a cockroach and covered with solar panels that use sunlight as an alternative energy source to drive car.
Solar energy is light and heat from the sun. Solar energy is free, and its supply is unlimited. There are n air and water pollution around using solar energy. But there is still some impact on the environment although indirect.
Photovoltaic cells used to convert sunlight into electricity using silicon and produces some waste materials. There are also large solar farms and those farms may also be harmful to the environment and desert ecosystems if not properly managed.
Solar energy can be used in different aspects. Solar energy can be used in agriculture. Greenhouses (which is quite different from GHG) Convert sunlight to heat that must be maximized to promote growth of plants and crops. Greenhouses have been around since Roman times and modern greenhouses were built in Europe in the 16th century. Greenhouses are still an important part of horticulture today is
Daylight systems also are used to maximize the energy released by the sun. It is used to provide interior lighting to replace the artificial lighting. Daylight systems include sawtooth roofs, light shelves, skylights and light tubes. Daylight systems when they are properly implemented, can reduce lighting-related energy consumption by 25 percent.
Solar energy can also be developed for solar thermal technologies, which can be used to heating water, space heating, space cooling and process heat generation. Solar energy can also be used to distill water and make salt water or brackish water or drinkable.
The solar water disinfection, or SODIS involves exposing water-filled plastic polyethylene terephthalate or PET bottles. This process takes a long time since exposure varies according to weather conditions. It requires at least six hours to two days today with overcast conditions. Currently there are two million people in developing countries centuries use SODIS for their daily drinking needs.
Also sunlight can be converted into electricity using photovoltaic or PV. PV has mainly been used to power small and medium-sized thing like a calculator powered by a single solar cell. There are homes powered by solar cells. Use solar water and space heating is the most widespread use in solar power. While ventilation and solar air heating is also growing in popularity.
There are three ways to use solar energy. The main way to use and converting solar energy using photovoltaic cells. Solar cells convert light directly into electricity. Solar cells are also called photovoltaic or photoelectric cells.
Meanwhile, solar ovens use a huge array of mirrors to concentrate the sun’s energy into a small space and produced very high temperatures. Solar ovens are also called “solar cookers”. A solar cooker can be used in hot countries to cook food.
With all the benefits if you use solar power, there is still a disadvantage to this alternative energy source. It does not work during night time. The cost of setting up solar stations are expensive but the advantage of using solar energy when accumulated so much more.
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