The Latest Solar Energy Facts
As natural resources are becoming more scarce and common approaches of providing electrical power and heat are becoming more expensive many people today are looking towards substitute sources of energy. Probably the first one that comes to mind for most consumers is solar power. Solar power is harnessing the power put off from the sun to provide an electrical source and heat.
Albeit not many people have an understanding of the theory, use of solar energy is well known in many parts of the world. Energy from the sun has been used for many years now, both knowingly and unknowingly. One of the initial instances when solar power was used was back in the 1800's when people collected heat from the rays of the sun by by means of a box and used it to prepare food. Today solar energy is chiefly produced from collecting and focusing the rays of the sun in order to perform some type of useful work. Worldwide however, only a very small percentage of the total energy the earth receives from the sun is actually being harnessed . Much of this disparity in the amount of energy being harnessed can be attributed to the abundant supplies of fossil fuels which has made solar energy less attractive than those sources of energy
When harnessing solar energy from the sun, people use heat engines as well as photovoltaic devices. These technologies can either be passive or active technologies based on the way they harness and convert the energy. Photovoltaic systems and solar cells are known to convert the energy into electricity and can be used to power watches and calculators. Some of these materials can be used to store heat for use later when it is cool. Other materials can be used to redirect light or deflect light to keep areas cool during the summer.
Abundant solar energy can be used in very many ways by people throughout the planet. Illumination is probably the most common application. Incorporating skylights and windows when building, reduces the amount of artificial lighting needed in that building. Heating water or using a large thermal mass for space heating are a small number of other common solar energy applications. People also use solar heaters to heat up pools. Well known solar harnessing systems consist of the use of solar panels to convert heat from the sun into electricity. However, the use of solar energy is retarded by the fact that the rays from the sun only reach the earth at particular times of the day and is based on location, time of year and weather. This limits the usage of solar energy without an capability to store the power.
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