The PV performance modeling application, PVsyst, implements the following cell temperature model:
where
is cell temperature (°C)
is ambient air temperature (°C)
is the absorption coefficient of the module (PVsyst default value is 0.9)
is the irradiance incident on the plane of the module or array (
)
is the efficiency of the PV module (PVsyst default is 0.1)
is the constant heat transfer component (
)
is the convective heat transfer component (
)
is wind speed (m/s)
PVsyst says little about what values to use for and
. Note that the current default values assume no dependance on wind speed (
)
- For free-standing arrays the current default is :
- For fully insulated arrays (close roof mount) the current default is:
PVsyst users can also enter a NOCT (Nominal Operating Collector Temperature) in place of values. The program then automatically calculates
values based on
and
.
