Closed
Description
PVSyst Cell Temperature Model
For users using PVSyst model chain, there is no equivalent cell temperature model. The only cell temperature model is the Sandia array performance model, pvlib.pvsystem.sapm_celltemp. The PVSyst cell temperature model is different.
Describe the solution you'd like
Add a corresponding method like pvlib.pvsystem.pvsyst_celltemp. I'll bet it's already implemented in PVLIB_MATLAB, right?
Describe alternatives you've considered
leave it to the user to implement
def pvsyst_celltemp(ambient_temp, gti, panel_efficiency, windspeed, alpha_absorption=0.9,
natural_convenction_coeff=29, forced_convection_coeff=0):
"""
Calculate PVSyst cell temperature.
Parameters
------------
ambient_temp : numeric
Ambient temperature in degrees Celsius
gti : numeric
Global tilted irradiance, AKA incident irradiance in the plane of array (POA) in W/m^2
panel_efficiency : numeric
PV module efficiency as a fraction
windspeed : numeric
Wind speed in m/s
alpha_absorption : numeric
Absorption coefficient, default is 0.9
natural_convenction_coeff : numeric
Natural convection coefficient, default is 29
forced_convection_coeff : numeric
Forced convection coefficient, default is zero
Returns
--------
celltemp : numeric
Cell temperature in degrees Celsius
"""
combined_convection_coeff = (
natural_convenction_coeff + forced_convection_coeff * windspeed
)
return (ambient_temp
+ alpha_absorption * gti * (1 - panel_efficiency) / combined_convection_coeff)I'm not married to these names, they are only for demonstration
Additional context
- is this related to Add PVsyst as option to ModelChain #487 at all? I tried to look for any corresponding or existing issues
- if this cell temperature model is implmented then should others be as well? what does SAM use?