From 1e417feae299238a536207094b3a3570cf7b0d05 Mon Sep 17 00:00:00 2001 From: Ioannis Sifnaios Date: Wed, 3 Dec 2025 11:40:01 +0100 Subject: [PATCH 1/2] Denote Faiman default coefficients are for module temperature --- pvlib/temperature.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/pvlib/temperature.py b/pvlib/temperature.py index 6c274d79b7..1db01891a0 100644 --- a/pvlib/temperature.py +++ b/pvlib/temperature.py @@ -456,14 +456,14 @@ def faiman(poa_global, temp_air, wind_speed=1.0, u0=25.0, u1=6.84): speed at module height used to determine NOCT. [m/s] u0 : numeric, default 25.0 - Combined heat loss factor coefficient. The default value is one - determined by Faiman for 7 silicon modules + Combined heat loss factor coefficient. The default value is for module + temperature determined by Faiman for 7 silicon modules in the Negev desert on an open rack at 30.9° tilt. :math:`\left[\frac{\text{W}/{\text{m}^2}}{\text{C}}\right]` u1 : numeric, default 6.84 - Combined heat loss factor influenced by wind. The default value is one - determined by Faiman for 7 silicon modules + Combined heat loss factor influenced by wind. The default value is + for module temperature determined by Faiman for 7 silicon modules in the Negev desert on an open rack at 30.9° tilt. :math:`\left[ \frac{\text{W}/\text{m}^2}{\text{C}\ \left( \text{m/s} \right)} \right]` From ec83b55112fe06c9ea83144c468729f3b8e7f28b Mon Sep 17 00:00:00 2001 From: Ioannis Sifnaios Date: Wed, 3 Dec 2025 11:47:51 +0100 Subject: [PATCH 2/2] Same update for faiman_rad --- pvlib/temperature.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/pvlib/temperature.py b/pvlib/temperature.py index 1db01891a0..c8436cbe58 100644 --- a/pvlib/temperature.py +++ b/pvlib/temperature.py @@ -539,14 +539,14 @@ def faiman_rad(poa_global, temp_air, wind_speed=1.0, ir_down=None, surface. [W/m^2] u0 : numeric, default 25.0 - Combined heat loss factor coefficient. The default value is one - determined by Faiman for 7 silicon modules + Combined heat loss factor coefficient. The default value is for module + temperature determined by Faiman for 7 silicon modules in the Negev desert on an open rack at 30.9° tilt. :math:`\left[\frac{\text{W}/{\text{m}^2}}{\text{C}}\right]` u1 : numeric, default 6.84 - Combined heat loss factor influenced by wind. The default value is one - determined by Faiman for 7 silicon modules + Combined heat loss factor influenced by wind. The default value is for + module temperature determined by Faiman for 7 silicon modules in the Negev desert on an open rack at 30.9° tilt. :math:`\left[ \frac{\text{W}/\text{m}^2}{\text{C}\ \left( \text{m/s} \right)} \right]`