Solar Gain, definition of
- Solar Gain
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Solar gain (known also as solar heat gain or passive solar gain) refers to the temperature increase in a space, object, or structure caused by solar radiation. The amount of solar gain increases with the strength of the Sun, and with the ability of any intervening material to transmit or resist the radiation.
Objects struck by Sunlight absorb the short-wave radiation from the light and re-radiate the heat at longer infrared wavelengths. Where there is a material or substance between the Sun and the objects struck that is more transparent to the shorter wavelengths than the longer, then when the Sun is shining the net result is an increase in temperature - hence solar gain.
Solar gain is also a problem for Solar Panels, as when they increase in temperature they progressively lose their ability to convert solar light into electrical power. So Solar Panels need to be kept cool to operate at peak performance.
Wikipedia Entry
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Related Tags: insulation, passive solar, buildings, sustainable development, energy efficiency, solar gain, solar power
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