sunpeek.components.types.calculate_eta0hem

sunpeek.components.types.calculate_eta0hem(eta0b, kd)

Calculate hemispherical peak collector efficiency eta_0hem from beam peak eta0b and diffuse IAM kd.

Parameters:

• eta0b (beam peak collector efficiency based on QDT test)

• kd (diffuse incidence angle modifier)

Notes

This method is based on the QDT-SST conversion formulas in ISO 9806 Annex B. Note: This essentially assumes a fixed diffuse irradiance ratio of 15%.

Return type:

Tuple[Quantity, str]

Returns:

• eta0hem (pint.Quantity, The calculated hemispherical peak collector efficiency)

• info (string, information on calculation method used)