This research paper is about the history of solar cells and includes how solar energy was used in 400 BC until the 1970s.The Greeks and Romans used solar energy to heat buildings and water. Greeks made use of the solar energy for growing vegetables in greenhouses....
The light and heat provided by the sun. A slightly longer answer: after running the gauntlet from an average of 93 million miles away, through the various layers of atmosphere and atmospheric conditions (clouds, pollutants, dust and the like), about half of the solar energy is absorbed by water and land, with the other half reflected and re-radiated back into space. The half that makes it is absorbed by oceans, land masses and plants; in the ocean, the energy drives heat and wind-driven currents (like the Gulf Stream); on land, the energy is absorbed and creates heat, and the little bit that's left is absorbed by plants and converted to chemical energy through a process we all know as photosynthesis....
Often used synonymously with solar energy, solar power is what you've got once the sun's energy has been converted to electricity. This can be done one of two ways: heating a liquid to produce steam and spin a generator, or through photovoltaic's...
According to an official report, the gap between firm supply and peak hours demand has already been shrunk to three digit (440 MW) during this fiscal and will slip into negative columns next year (-441 MW) and further intensify to (-1,457 MW) during the financial year 2006-07....
One of the main advantages of a solar power system for your home is the lack of pollution given off by solar panels when generating electricity...
The alternative, and more common method for integrating solar power to your home, is through the use of solar power panels....
When photons (contained within the suns rays) hit the solar cells, the electrons absorb this solar energy, transforming them into conduction electrons....
Photovoltaic refers to a technology which uses a device (usually a solar panel) to produce free electrons when exposed to light, resulting in the production of an electric current....
Modern solar powered battery chargers, designed for a range of appliances, allow us to provide the energy needed to run a certain device. This method of charging up an appliance takes the burden off the use of fossil fuels by a small degree....
Possible uses of solar electricity could be to incorporate the current into an existing power supply, provide a separate power supply dependent upon the solar panel, to charge solar batteries for the storage of solar electricity, or even to sell back to the national grid....
Wind energy has been in use for thousands of years. Our ancestors used the wind to navigate the seas in exploration and fishing....
The propeller design is common in horizontal wind turbines, as the less popular design of vertical wind turbines use a different method to capture wind energy....
In this day and age, the world needs to look at the different natural energy sources available to us. Global warming could be due our energy craving lifestyle, so we should look into more environmentally friendly energy sources....
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