Set nSeg.min=1

This is needed for #290 to use the slab with epsilon-NTU
lbl-srg · Oct 10, 2014 · 6f7088e · 6f7088e
1 parent a58a191
commit 6f7088e
Showing 1 changed file with 11 additions and 4 deletions.
diff --git a/Buildings/Fluid/FixedResistances/BaseClasses/Pipe.mo b/Buildings/Fluid/FixedResistances/BaseClasses/Pipe.mo
@@ -8,7 +8,7 @@ model Pipe
   extends Buildings.Fluid.Interfaces.TwoPortFlowResistanceParameters(
     final computeFlowResistance=(abs(dp_nominal) > Modelica.Constants.eps));
 
-  parameter Integer nSeg(min=2) = 10 "Number of volume segments";
+  parameter Integer nSeg(min=1) = 10 "Number of volume segments";
   parameter Modelica.SIunits.Length thicknessIns "Thickness of insulation";
   parameter Modelica.SIunits.ThermalConductivity lambdaIns
     "Heat conductivity of insulation";
@@ -75,9 +75,11 @@ equation
       points={{-10,6.10623e-16},{7,6.10623e-16},{7,-18}},
       color={0,127,255},
       smooth=Smooth.None));
-  for i in 1:(nSeg - 1) loop
-    connect(vol[i].ports[2], vol[i + 1].ports[1]);
-  end for;
+  if nSeg > 1 then
+    for i in 1:(nSeg - 1) loop
+      connect(vol[i].ports[2], vol[i + 1].ports[1]);
+    end for;
+  end if;
   connect(vol[nSeg].ports[2], port_b) annotation (Line(
       points={{11,-18},{12,-18},{12,5.55112e-16},{100,5.55112e-16}},
       color={0,127,255},
@@ -112,6 +114,11 @@ Buildings.Fluid.MixingVolumes.MixingVolume</a>.
 </html>", revisions="<html>
 <ul>
 <li>
+October 10, 2014, by Michael Wetter:<br/>
+Changed minimum attribute for <code>nSeg</code> from 2 to 1.
+This is required for the radiant slab model.
+</li>
+<li>
 October 8, 2013, by Michael Wetter:<br/>
 Removed parameter <code>show_V_flow</code>.
 </li>