pvdeg.degradation.vantHoff_deg

pvdeg.degradation.vantHoff_deg(weather_df, meta, I_chamber, temp_chamber, poa=None, temp=None, p=0.5, Tf=1.41)

Van’t Hoff Irradiance Degradation

Parameters:

• weather_df (pd.dataframe) – Dataframe containing at least dni, dhi, ghi, temperature, wind_speed

• meta (dict) – Location meta-data containing at least latitude, longitude, altitude

• I_chamber (float) – Irradiance of Controlled Condition [W/m²]

• temp_chamber (float) – Reference temperature [°C] “Chamber Temperature”

• poa (series or data frame, optional) – dataframe containing ‘poa_global’, Global Plane of Array Irradiance [W/m²]

• temp (pandas series, optional) – Solar module temperature or Cell temperature [°C]. If no cell temperature is given, it will be generated using the default paramters of pvdeg.temperature.cell

• p (float) – fit parameter

• Tf (float) – Multiplier for the increase in degradation for every 10[°C] temperature increase

Returns:

accelerationFactor (float or series) – Degradation acceleration factor