Change in QTra definition

IDEAS/Buildings/Components/BoundaryWall.mo

@@ -4,9 +4,9 @@ model BoundaryWall "Opaque wall with optional prescribed heat flow rate or tempe
     final custom_q50=0,
     final use_custom_q50=true,
     final nWin=1,
-    QTra_design=if use_T_in or use_T_fixed then U_value*A*(TRefInt - T_in_nom) else -Q_in_nom,
     dT_nominal_a=-1,
     add_cracks=false,
+    QTra_design(fixed=false),
     layMul(disableInitPortB=use_T_in or use_T_fixed, monLay(monLayDyn(each
             addRes_b=(sim.lineariseDymola and (use_T_in or use_T_fixed))))));
 
@@ -69,6 +69,8 @@ protected
   IDEAS.Buildings.Components.Interfaces.WeaBus weaBus(final numSolBus=sim.numIncAndAziInBus,
       outputAngles=sim.outputAngles)                  "Weather bus"
     annotation (Placement(transformation(extent={{40,-80},{60,-60}})));
+initial equation
+    QTra_design=if use_T_in or use_T_fixed then U_value*A*(TRefInt - T_in_nom) else -Q_in_nom;
 equation
   assert(not (use_T_in and use_Q_in or use_T_in and use_T_fixed or use_Q_in and use_T_fixed),
     "In "+getInstanceName()+": Only one of the following options can be used simultaneously: use_T_in, use_Q_in, use_T_fixed");

IDEAS/Buildings/Components/Interfaces/PartialZone.mo

@@ -36,7 +36,7 @@ model PartialZone "Building zone model"
     annotation(Dialog(tab="Advanced", group="Radiative heat exchange"));
   parameter Modelica.Units.SI.Temperature defaultTRef=291.15 "Default zone temperature for calculation of design heat load"
     annotation (Dialog(group="Design heat load", tab="Advanced"));
-  Modelica.Blocks.Interfaces.RealOutput TRef_zone[nSurf] "Reference zone temperature for the surfaces connected to this zone, for calculation of design heat load";
+  Modelica.Blocks.Interfaces.RealOutput TRef_zone[nSurf]=defaultTRef*ones(nSurf) "Reference zone temperature for the surfaces connected to this zone, for calculation of design heat load";
   final parameter Modelica.Units.SI.Power QInf_design=1012*1.204*V/3600*n50_int
       /n50toAch*(defaultTRef - sim.Tdes)
     "Design heat losses from infiltration at reference outdoor temperature";
@@ -507,7 +507,7 @@ end for;
   connect(setq50.use_custom_n50s, propsBusInt.use_custom_n50) annotation (Line(points={{-60.8,
           -92.8},{-60,-92.8},{-60,-92},{-80.1,-92},{-80.1,39.9}},       color={
           255,0,255}));
-  connect(TRef_zone[1:nSurf], propsBusInt[1:nSurf].TRef_zone);
+  connect(TRef_zone, propsBusInt.TRef_zone);
     annotation (Dialog(group="Design heat load", tab="Advanced"),
               Placement(transformation(extent={{
             140,48},{100,88}})),

IDEAS/Buildings/Components/InternalWall.mo

@@ -8,8 +8,8 @@ model InternalWall "interior opaque wall between two zones"
     E(y=if sim.computeConservationOfEnergy then layMul.E else 0),
     Qgai(y=(if sim.openSystemConservationOfEnergy or not sim.computeConservationOfEnergy
            then 0 else sum(port_emb.Q_flow))),
-    QTra_design=U_value*A*(TRefInt - TRef_b),
-    q50_zone(v50_surf=0));
+    q50_zone(v50_surf=0),
+    QTra_design(fixed=false));
   //using custom q50 since this model is not an external component
 
   parameter Boolean linIntCon_b=sim.linIntCon
@@ -139,6 +139,8 @@ public
     if hasCavity and sim.interZonalAirFlowType == IDEAS.BoundaryConditions.Types.InterZonalAirFlow.OnePort
     "1-port model for open door"
     annotation (Placement(transformation(extent={{-10,58},{10,78}})));
+initial equation
+  QTra_design=U_value*A*(TRefInt - TRef_b);
 equation
   assert(hasCavity == false or IDEAS.Utilities.Math.Functions.isAngle(incInt, IDEAS.Types.Tilt.Wall),
     "In " + getInstanceName() + ": Cavities are only supported for vertical walls, but inc=" + String(incInt) + ". The model is not accurate.",