Run docstring updater

Author: fwitte

src/tespy/components/heat_exchangers/ntu.py

@@ -386,9 +386,10 @@ class NTUHeatExchanger(HeatExchanger):
     eps : float, dict
         Heat exchanger effectiveness, heat transfer over maximum transferable
         heat flow at constant capacity rates. Quantity: :code:`efficiency`.
+        Equation: :py:meth:`eps_func <tespy.components.heat_exchangers.ntu.NTUHeatExchanger.eps_func>`.
 
     flow_arrangement : str
-        Flow arrangement for the effectiveness-NTU relation, one of
+        Flow arrangement for the effectiveness-NTU relation, mandatory, one of
         :code:`'counterflow'`, :code:`'parallelflow'`,
         :code:`'crossflow_both_unmixed'`, :code:`'crossflow_hot_mixed'`,
         :code:`'crossflow_cold_mixed'`, :code:`'crossflow_both_mixed'`,
@@ -428,6 +429,7 @@ class NTUHeatExchanger(HeatExchanger):
 
     NTU : float, dict
         Number of transfer units :code:`UA` over minimum capacity rate.
+        Equation: :py:meth:`NTU_func <tespy.components.heat_exchangers.ntu.NTUHeatExchanger.NTU_func>`.
 
     num_shell_passes : int
         Number of shell passes for the shell and tube flow arrangement (with 2,

src/tespy/components/heat_exchangers/parallel.py

@@ -142,12 +142,12 @@ class ParallelFlowHeatExchanger(HeatExchanger):
         :code:`temperature_difference`.
 
     ttd_l : float, dict
-        Terminal temperature difference at hot side outlet to cold side inlet.
+        Terminal temperature difference at hot side inlet to cold side inlet.
         Quantity: :code:`temperature_difference`.
         Equation: :py:meth:`ttd_l_func <tespy.components.heat_exchangers.parallel.ParallelFlowHeatExchanger.ttd_l_func>`.
 
     ttd_u : float, dict
-        Terminal temperature difference at hot side inlet to cold side outlet.
+        Terminal temperature difference at hot side outlet to cold side outlet.
         Quantity: :code:`temperature_difference`.
         Equation: :py:meth:`ttd_u_func <tespy.components.heat_exchangers.parallel.ParallelFlowHeatExchanger.ttd_u_func>`.