@@ -5,7 +5,7 @@ Temperature models
55
66pvlib provides a variety of models for predicting the operating temperature
77of a PV module from irradiance and weather inputs. These models range from
8- simple empirical equations requiring just a few multiplications to complex
8+ simple empirical equations requiring just a few multiplications to more complex
99thermal balance models with numerical integration.
1010
1111Types of models
@@ -14,8 +14,8 @@ Types of models
1414Temperature models predict one of two quantities:
1515
1616- *module temperature *: the temperature as measured at the back surface
17- of a PV module. Easy to measure, but not directly related to PV
18- efficiency.
17+ of a PV module. Easy to measure, but usually a few degrees less
18+ than the cell temperature which determines efficiency.
1919- *cell temperature *: the temperature of the PV cell itself. The relevant
2020 temperature for PV modeling, but almost never measured directly.
2121
@@ -24,8 +24,8 @@ temperature.
2424Temperature models estimate these quantities using inputs like incident
2525irradiance, ambient temperature, and wind speed. Each model also takes
2626a set of parameter values that represent how a PV module responds to
27- those inputs. Different parameter values may be used for different PV
28- module technologies and/or the mounting conditions of the module.
27+ those inputs. Parameter values generally depend on both the PV
28+ module technologies and the mounting conditions of the module.
2929
3030Another way to classify temperature models is whether they account for
3131the thermal inertia of a PV module. Temperature models are either:
@@ -36,7 +36,7 @@ the thermal inertia of a PV module. Temperature models are either:
3636- *transient *: the module's thermal inertia is included in the model,
3737 causing a lag in modeled temperature change following changes in the inputs.
3838
39- Other effects that temperature models may consider include variation in
39+ Other effects that temperature models may consider include the
4040photoconversion efficiency and radiative cooling.
4141
4242The temperature models currently available in pvlib are summarized in the
@@ -71,7 +71,8 @@ Model parameters
7171Some temperature model functions provide default values for their parameters,
7272and several additional sets of temperature model parameter values are
7373available in :py:data: `pvlib.temperature.TEMPERATURE_MODEL_PARAMETERS `.
74- However, these generic values may not be suitable for all modules.
74+ However, these generic values may not be suitable for all modules and mounting
75+ configurations.
7576
7677Module-specific values can be obtained via testing, for example following
7778the IEC 61853-2 standard.
@@ -85,8 +86,8 @@ Other functions
8586
8687pvlib also provides a few other functions for temperature modeling:
8788
88- - :py:func: `~pvlib.temperature.prilliman `: an "add-on" model that introduces
89- transience to steady-state models .
89+ - :py:func: `~pvlib.temperature.prilliman `: an "add-on" model that reprocesses
90+ the output of a steady-state model to apply transient effects .
9091- :py:func: `~pvlib.temperature.sapm_cell_from_module `: a model for
9192 estimating cell temperature from module temperature.
9293- :py:func: `~pvlib.temperature.generic_linear `: a generic linear model form,
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