Definition: Direct normal irradiance

From Open Energy Information

Dictionary.png

Direct normal irradiance

the amount of solar radiation received per unit area by a surface perpendicular (normal) to the rays that come in a straight line from the direction of the sun at its current position in the sky.[1]



Also Known As
DNI
Related Terms
Solar radiationIrradianceConcentrating solar powerGlobal horizontal irradiance
References
  1. http://www.3tier.com/en/support/glossary/#dni