Direct Solar Radiation in an Inclined Surface Calculator
Direct Solar Radiation Formula
Direct Solar Radiation (Qi=Qo×D×A×cos(α)):
Where:
- Qi is the direct solar radiation, in kilowatts (kW).
- Qo is the solar constant, in kilowatts per square meter (kW/m²).
- A is the absorber surface area, in square meters (m²).
- D is the transmission factor (0.06 – 0.82).
- α is the angle between a line perpendicular to the surface and the direction of radiation, in degrees.