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Intensity of solar radiation

This is the intensity of solar radiation which should be taken as 1000 W/m2 for most latitudes. It is recommended that the local value should be obtained where possible which can be calculated with our solar radiation tool.

According to ERA Report No 88-0108, in clear atmosphere the maximum solar received by a vertical tube is 725 W/m2 and occurs when the altitude of the sun is approximately 32°.

Symbol
$H_{sun}$
Unit
W/m$^2$
Used in
$\Delta \theta_{sun}$
Temperature rise by solar radiation [K]
$W_{sun}$
Solar radiation heat transfer to surface [W/m]