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‎docs/sphinx/source/user_guide/modeling_topics/temperature.rst‎

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@@ -25,6 +25,10 @@ a set of parameter values that represent how a PV module responds to
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those inputs. Parameter values generally depend on both the PV
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module technologies, the mounting configuration of the module,
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and on any weather parameters that are not included in the model.
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Note that, despite models conventionally being associated with either
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cell or module temperature, it is actually the parameter values that determine
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which of the two temperatures are predicted, as they will produce the same
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type of temperature from which they were originally derived.
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Another aspect of temperature models is whether they account for
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the thermal inertia of a PV module. Temperature models are either:
@@ -41,40 +45,39 @@ photoconversion efficiency and radiative cooling.
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The temperature models currently available in pvlib are summarized in the
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following table:
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+-------------------------------------------+--------+------------+---------------------------------------------------------------------------+
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| Model | Type | Transient? | Inputs |
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| | | +----------------+---------------------+------------+-----------------------+
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| | | | POA irradiance | Ambient temperature | Wind speed | Downwelling IR [#f1]_ |
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+===========================================+========+============+================+=====================+============+=======================+
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| :py:func:`~pvlib.temperature.faiman` | either | | ✓ | ✓ | ✓ | |
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+-------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.faiman_rad` | either | | ✓ | ✓ | ✓ | ✓ |
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+-------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.fuentes` | cell | ✓ | ✓ | ✓ | ✓ | |
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+-------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.noct_sam` | cell | | ✓ | ✓ | ✓ | |
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+-------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.pvsyst_cell` | cell | | ✓ | ✓ | ✓ | |
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+-------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.ross` | cell | | ✓ | ✓ | | |
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+-------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.sapm_cell` | cell | | ✓ | ✓ | ✓ | |
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+-------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.sapm_module` | module | | ✓ | ✓ | ✓ | |
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+-------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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+----------------------------------------------+--------+------------+---------------------------------------------------------------------------+
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| Model | Type | Transient? | Inputs |
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| | | +----------------+---------------------+------------+-----------------------+
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| | | | POA irradiance | Ambient temperature | Wind speed | Downwelling IR [#f1]_ |
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+==============================================+========+============+================+=====================+============+=======================+
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| :py:func:`~pvlib.temperature.faiman` | either | | ✓ | ✓ | ✓ | |
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+----------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.faiman_rad` | either | | ✓ | ✓ | ✓ | ✓ |
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+----------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.fuentes` | either | ✓ | ✓ | ✓ | ✓ | |
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+----------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.generic_linear` | cell | | ✓ | ✓ | ✓ | |
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+----------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.noct_sam` | cell | | ✓ | ✓ | ✓ | |
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+----------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.pvsyst_cell` | cell | | ✓ | ✓ | ✓ | |
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+----------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.ross` | cell | | ✓ | ✓ | | |
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+----------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.sapm_cell` | cell | | ✓ | ✓ | ✓ | |
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+----------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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| :py:func:`~pvlib.temperature.sapm_module` | module | | ✓ | ✓ | ✓ | |
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+----------------------------------------------+--------+------------+----------------+---------------------+------------+-----------------------+
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.. [#f1] Downwelling infrared radiation.
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In addition to the core models above, pvlib provides several other functions
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for temperature modeling:
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- :py:func:`~pvlib.temperature.prilliman`: an "add-on" model that reprocesses
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the output of a steady-state model to apply transient effects.
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- :py:func:`~pvlib.temperature.sapm_cell_from_module`: a model for
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estimating cell temperature from module temperature.
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- :py:func:`~pvlib.temperature.generic_linear`: a generic linear model form,
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equivalent to several conventional temperature models.
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Model parameters
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used to derive the default parameter values were taken on different PV systems in different
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locations under different conditions.
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Parameter values for one model (e.g. ``u0``, ``u1`` for :py:func:`~pvlib.temperature.faiman`)
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can be converted to another model (e.g. ``u_c``, ``u_v`` for :py:func:`~pvlib.temperature.pvsyst_cell`)
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using :py:class:`~pvlib.temperature.GenericLinearModel`.
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Module-specific values can be obtained via testing, for example following
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the IEC 61853-2 standard for the Faiman model; however, such values still do not capture
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the dependency of temperature on system design and other variables.
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Parameter values for one model (e.g. ``u0``, ``u1`` for :py:func:`~pvlib.temperature.faiman`)
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can be converted to another model (e.g. ``u_c``, ``u_v`` for :py:func:`~pvlib.temperature.pvsyst_cell`)
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using :py:class:`~pvlib.temperature.GenericLinearModel`.
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Currently, pvlib provides no functionality for fitting parameter values
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using measured temperature.

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