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Co-authored-by: Cliff Hansen <[email protected]>
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docs/sphinx/source/user_guide/modeling_topics/temperature.rst

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@@ -5,7 +5,7 @@ Temperature models
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pvlib provides a variety of models for predicting the operating temperature
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of a PV module from irradiance and weather inputs. These models range from
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simple empirical equations requiring just a few multiplications to complex
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simple empirical equations requiring just a few multiplications to more complex
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thermal balance models with numerical integration.
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Types of models
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Temperature models predict one of two quantities:
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- *module temperature*: the temperature as measured at the back surface
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of a PV module. Easy to measure, but not directly related to PV
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efficiency.
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of a PV module. Easy to measure, but usually a few degrees less
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than the cell temperature which determines efficiency.
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- *cell temperature*: the temperature of the PV cell itself. The relevant
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temperature for PV modeling, but almost never measured directly.
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Temperature models estimate these quantities using inputs like incident
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irradiance, ambient temperature, and wind speed. Each model also takes
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a set of parameter values that represent how a PV module responds to
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those inputs. Different parameter values may be used for different PV
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module technologies and/or the mounting conditions of the module.
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those inputs. Parameter values generally depend on both the PV
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module technologies and the mounting conditions of the module.
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Another way to classify temperature models is whether they account for
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the thermal inertia of a PV module. Temperature models are either:
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- *transient*: the module's thermal inertia is included in the model,
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causing a lag in modeled temperature change following changes in the inputs.
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Other effects that temperature models may consider include variation in
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Other effects that temperature models may consider include the
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photoconversion efficiency and radiative cooling.
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The temperature models currently available in pvlib are summarized in the
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Some temperature model functions provide default values for their parameters,
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and several additional sets of temperature model parameter values are
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available in :py:data:`pvlib.temperature.TEMPERATURE_MODEL_PARAMETERS`.
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However, these generic values may not be suitable for all modules.
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However, these generic values may not be suitable for all modules and mounting
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configurations.
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Module-specific values can be obtained via testing, for example following
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the IEC 61853-2 standard.
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pvlib also provides a few other functions for temperature modeling:
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- :py:func:`~pvlib.temperature.prilliman`: an "add-on" model that introduces
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transience to steady-state models.
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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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