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The solar luminosity (L ☉) is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun. One nominal solar luminosity is defined by the International Astronomical Union to be 3.828 × 10 26 W. [2]
The following outline is provided as an overview of and topical guide to solar energy: Solar energy is radiant light and heat from the Sun. It has been harnessed by humans since ancient times using a range of ever-evolving technologies. Solar energy technologies include solar heating, solar photovoltaics, solar thermal electricity and solar ...
Solar energy is the radiant energy from the Sun's light and heat, which can be harnessed using a range of technologies such as solar electricity, solar thermal energy (including solar water heating) and solar architecture.
The solar constant is a measure of flux density, is the amount of incoming solar electromagnetic radiation per unit area that would be incident on a plane perpendicular to the rays, at a distance of one astronomical unit (AU) (roughly the mean distance from the Sun to Earth).
Solar Towers from left: PS10, PS20. The first three units of Solnova. I (right) III (left, front) and IV (left rear). The two towers in the background are the PS10 and PS20 solar power stations. PS10 is the first of a set of solar power generation plants to be constructed in the same area that will total more than 300 MW by 2013.
A solar power tower consists of an array of dual-axis tracking reflectors that concentrate sunlight on a central receiver atop a tower; the receiver contains a heat-transfer fluid, which can consist of water-steam or molten salt. Optically a solar power tower is the same as a circular Fresnel reflector.
Estas curvas están basadas en datos del NREL arriba de la atmósfera y al nivel del mar, los cuales son estándares adoptados por la industria fotovoltaica para asegurar condiciones de prueba consistentes, y son similares a la luz que se podría esperar en Norte América. Se indican las regiones de luz ultravioleta, visible e infrarroja.
In photometry, luminous energy is the perceived energy of light.This is sometimes called the quantity of light. [1] Luminous energy is not the same as radiant energy, the corresponding objective physical quantity.