Merge pull request #2006 from ibpsa/issue2005_partialCarnot_parameterEvaluation

mwetter · web-flow · commit 17a2c29f50fd · 2025-05-22T15:40:43.000-07:00
Update PartialCarnot.mo to set Evaluate=true for structural parameter
diff --git a/IBPSA/Fluid/HeatPumps/ModularReversible/RefrigerantCycle/BaseClasses/PartialCarnot.mo b/IBPSA/Fluid/HeatPumps/ModularReversible/RefrigerantCycle/BaseClasses/PartialCarnot.mo
@@ -6,7 +6,7 @@ partial model PartialCarnot
     annotation(Dialog(group="Nominal condition"));
   parameter Boolean use_constAppTem=false
     "=true to fix approach temperatures at nominal values. This can improve simulation speed"
-    annotation(Dialog(group="Efficiency"));
+    annotation(Evalute=true, Dialog(group="Efficiency"));
   parameter Modelica.Units.SI.TemperatureDifference TAppCon_nominal(min=0)
     "Temperature difference between refrigerant and working fluid outlet in condenser"
     annotation (Dialog(group="Efficiency"));
@@ -125,7 +125,14 @@ equation
   and chiller with the Carnot approach.
 </p>
 </html>", revisions="<html>
-<ul><li>
+<ul>
+<li>
+May 2, 2025, by Michael Wetter:<br/>
+Set <code>Evaluate=true</code> for <code>use_constAppTem</code>. This is a structural parameter, if evaluated during
+translation, it has shown to remove a 2x2 nonlinear system of equations to compute the approach temperatures.<br/>
+This is for <a href=\"https://github.com/ibpsa/modelica-ibpsa/issues/2005\">IBPSA, #2005</a>.
+</li>
+<li>
     <i>October 2, 2022</i> by Fabian Wuellhorst:<br/>
     First implementation (see issue <a href=
     \"https://github.com/ibpsa/modelica-ibpsa/issues/1576\">#1576</a>)
