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Clarify f_x #1727

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May 4, 2023
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1 change: 1 addition & 0 deletions docs/sphinx/source/whatsnew/v0.9.6.rst
Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ Requirements

Contributors
~~~~~~~~~~~~
* Lakshya Garg (:ghuser:`Lakshyadevelops`)
* Adam R. Jensen (:ghuser:`adamrjensen`)
* Siddharth Kaul (:ghuser:`k10blogger`)
* Kshitiz Gupta (:ghuser:`kshitiz305`)
Expand Down
13 changes: 9 additions & 4 deletions pvlib/bifacial/infinite_sheds.py
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@
from pvlib.shading import masking_angle
from pvlib.irradiance import beam_component, aoi, haydavies


def _vf_ground_sky_integ(surface_tilt, surface_azimuth, gcr, height,
pitch, max_rows=10, npoints=100, vectorize=False):
"""
Expand Down Expand Up @@ -102,7 +103,8 @@ def _vf_row_sky_integ(f_x, surface_tilt, gcr, npoints=100):
Parameters
----------
f_x : numeric
Fraction of row slant height from the bottom that is shaded. [unitless]
Fraction of row slant height from the bottom that is shaded from
direct irradiance. [unitless]
surface_tilt : numeric
Surface tilt angle in degrees from horizontal, e.g., surface facing up
= 0, surface facing horizon = 90. [degree]
Expand Down Expand Up @@ -162,7 +164,8 @@ def _poa_sky_diffuse_pv(f_x, dhi, vf_shade_sky_integ, vf_noshade_sky_integ):
Parameters
----------
f_x : numeric
Fraction of row slant height from the bottom that is shaded. [unitless]
Fraction of row slant height from the bottom that is shaded from
direct irradiance. [unitless]
dhi : numeric
Diffuse horizontal irradiance (DHI). [W/m^2]
vf_shade_sky_integ : numeric
Expand Down Expand Up @@ -257,7 +260,8 @@ def _vf_row_ground_integ(f_x, surface_tilt, gcr, npoints=100):
Parameters
----------
f_x : numeric
Fraction of row slant height from the bottom that is shaded. [unitless]
Fraction of row slant height from the bottom that is shaded from
direct irradiance. [unitless]
surface_tilt : numeric
Surface tilt angle in degrees from horizontal, e.g., surface facing up
= 0, surface facing horizon = 90. [degree]
Expand Down Expand Up @@ -320,7 +324,8 @@ def _poa_ground_pv(f_x, poa_ground, f_gnd_pv_shade, f_gnd_pv_noshade):
Parameters
----------
f_x : numeric
Fraction of row slant height from the bottom that is shaded. [unitless]
Fraction of row slant height from the bottom that is shaded from
direct irradiance. [unitless]
poa_ground : numeric
Ground-reflected irradiance that would reach the row surface if the
full ground was visible. poa_gnd_sky accounts for limited view of the
Expand Down