As of 2011 the technology produced less than one tenth of one percent of global energy demand.
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Among the most common devices used to capture solar energy and convert it to thermal energy are flat plate collectors which are used for solar heating applications.
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Even in sunny parts of the world s temperate regions for instance a collector must have a surface.
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Energy efficiency is extremely vital for environmental as well as financial grounds.
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It is an essential source of renewable energy and its technologies are broadly characterized as either passive solar or active solar depending.
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Solar energy is the technology used to harness the sun s energy and make it useable.
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Because the intensity of solar radiation at earth s surface is so low these collectors must be large in area.