pvlib.bifacial.utils.vf_row_ground_2d_integ#

pvlib.bifacial.utils.vf_row_ground_2d_integ(surface_tilt, gcr, x0=0, x1=1)[source]#

Calculate the average view factor to the ground from a segment of the row surface between x0 and x1.

Assumes a PV system of infinitely long rows with uniform pitch on horizontal ground. The view to the ground is restricted by the row’s tilt and the bottom of the facing row.

Parameters:

surface_tilt (numeric) – Surface tilt angle in degrees from horizontal, e.g., surface facing up = 0, surface facing horizon = 90. [degree]
gcr (numeric) – Ratio of the row slant length to the row spacing (pitch). [unitless]
x0 (numeric, default 0.) – Position on the row’s slant length, as a fraction of the slant length. x0=0 corresponds to the bottom of the row. x0 should be less than x1. [unitless]
x1 (numeric, default 1.) – Position on the row’s slant length, as a fraction of the slant length. x1 should be greater than x0. [unitless]

Returns:

vf (numeric) – Integrated view factor to the visible ground on the interval (x0, x1). [unitless]