put celsius in denominator

* update what's new for v0.8.0
* use textrm for units

Signed-off-by: Mark Mikofski <[email protected]>

Author: mikofski

docs/sphinx/source/whatsnew/v0.8.0.rst

@@ -1,4 +1,4 @@
-.. _whatsnew_0730:
+.. _whatsnew_0800:
 
 v0.8.0 (Month day, year)
 -------------------------
@@ -17,11 +17,18 @@ Testing
 
 Documentation
 ~~~~~~~~~~~~~
-* Improved formatting and content of docstrings in `pvlib.atmosphere`
+* Improved formatting and content of docstrings in :py:mod:`pvlib.atmosphere`.
+  (:pull:`969`)
+* Fix LaTeX rendering in :py:func:`pvlib.singlediode.bishop88`. (:pull:`967`)
+* Clarify units for heat loss factors in
+  :py:func:`pvlib.temperature.pvsyst_cell` and
+  :py:func:`pvlib.temperature.faiman`. (:pull:`960`)
 
 Requirements
 ~~~~~~~~~~~~
 
 Contributors
 ~~~~~~~~~~~~
 * Cliff Hansen (:ghuser:`cwhanse`)
+* Kevin Anderson (:ghuser:`kanderso-nrel`)
+* Mark Mikofski (:ghuser:`mikofski`)

pvlib/temperature.py

@@ -289,12 +289,13 @@ def pvsyst_cell(poa_global, temp_air, wind_speed=1.0, u_c=29.0, u_v=0.0,
         Combined heat loss factor coefficient. The default value is
         representative of freestanding modules with the rear surfaces exposed
         to open air (e.g., rack mounted). Parameter :math:`U_{c}` in
-        :eq:`pvsyst` [W/(m^2 C)].
+        :eq:`pvsyst`.
+        :math:`\left[\frac{\text{W}/{\text{m}^2}}{\text{C}}\right]`
 
     u_v : float, default 0.0
         Combined heat loss factor influenced by wind. Parameter :math:`U_{v}`
-        in :eq:`pvsyst`
-        :math:`\left[\frac{W/{\left(m^2 C\right)}}{m/s}\right]`.
+        in :eq:`pvsyst`.
+        :math:`\left[ \frac{\text{W}/\text{m}^2}{\text{C}\ \left( \text{m/s} \right)} \right]`
 
     eta_m : numeric, default 0.1
         Module external efficiency as a fraction, i.e., DC power / poa_global.
@@ -380,12 +381,13 @@ def faiman(poa_global, temp_air, wind_speed=1.0, u0=25.0, u1=6.84):
 
     u0 : numeric, default 25.0
         Combined heat loss factor coefficient. The default value is one
-        determined by Faiman for 7 silicon modules. [W/(m^2 C)].
+        determined by Faiman for 7 silicon modules.
+        :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.
-        :math:`\left[\frac{W/{\left(m^2 C\right)}}{m/s}\right]`.
+        :math:`\left[ \frac{\text{W}/\text{m}^2}{\text{C}\ \left( \text{m/s} \right)} \right]`
 
     Returns
     -------