AixLib.ThermalZones.ReducedOrder.Windows.BaseClasses.Conversions.to_HDirNor

# .AixLib.ThermalZones.ReducedOrder.Windows.BaseClasses.Conversions.to_HDirNor

Converts the direct irradiation onto a horizontal surface to direct irradiation on a normal surface

## Information

This model converts the direct irradiation on a horizontal surface to the direct irradiation on a normal surface. Therefore it needs the solar altitude angle.

## Revisions

- June 30, 2016, by Stanley Risch:
  Implemented.

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