Merge pull request #145 from RWTH-EBC/issue142_bugfix

Issue142 AHU conditional
Example Multizone runs

AixLib/Building/LowOrder/Multizone/MultizoneEquipped.mo

@@ -3,13 +3,14 @@ model MultizoneEquipped
   "Multizone with basic heat supply system, air handling unit, an arbitrary number of thermal zones (vectorized), and ventilation"
   extends AixLib.Building.LowOrder.Multizone.partialMultizone;
   Modelica.Thermal.HeatTransfer.Sensors.TemperatureSensor TAirAHUAvg
-    "Averaged air temperature of the zones which are supplied by the AHU" annotation (Placement(transformation(extent={{16,-20},{8,-12}})));
+    "Averaged air temperature of the zones which are supplied by the AHU" annotation (Placement(transformation(extent={{16,-26},
+            {8,-18}})));
   BaseClasses.ThermSplitter splitterThermPercentAir(dimension=buildingParam.numZones,
       splitFactor=AixLib.Building.LowOrder.BaseClasses.ZoneFactorsZero(buildingParam.numZones, zoneParam)) annotation (
       Placement(transformation(
         extent={{-4,-4},{4,4}},
         rotation=0,
-        origin={26,-16})));
+        origin={26,-22})));
   Modelica.Blocks.Interfaces.RealInput AHU[4]
     "Input for AHU Conditions [1]: Desired Air Temperature in K [2]: Desired minimal relative humidity [3]: Desired maximal relative humidity [4]: Schedule Desired Ventilation Flow"
     annotation (Placement(transformation(
@@ -23,7 +24,7 @@ model MultizoneEquipped
     zoneParam=zoneParam,
     each recOrSep=true,
     each staOrDyn=true) "Heater Cooler with PI control"
-    annotation (Placement(transformation(extent={{-32,-54},{-6,-28}})));
+    annotation (Placement(transformation(extent={{-32,-66},{-6,-40}})));
   Modelica.Blocks.Interfaces.RealInput TSetHeater[buildingParam.numZones](
     final quantity="ThermodynamicTemperature",
     final unit="K",
@@ -111,11 +112,13 @@ model MultizoneEquipped
         extent={{-4,-4},{4,4}},
         rotation=90,
         origin={48,10})));
+  Modelica.Blocks.Nonlinear.Limiter minTemp(uMax=1000, uMin=1)
+    annotation (Placement(transformation(extent={{0,-27},{-10,-17}})));
 equation
   AirHandlingUnit.phi_extractAir = hold(AirHandlingUnit.phi_sup);
   for i in 1:buildingParam.numZones loop
     connect(internalGains[(i*3)-2], airFlowRate.relOccupation[i]) annotation (Line(
-      points={{76,-100},{74,-100},{74,-22},{-76,-22},{-76,10.8},{-72,10.8}},
+      points={{76,-100},{74,-100},{74,-36},{-76,-36},{-76,10.8},{-72,10.8}},
       color={0,0,127},
       smooth=Smooth.None));
   end for;
@@ -124,12 +127,12 @@ equation
       color={0,0,127},
       smooth=Smooth.None));
   connect(splitterThermPercentAir.signalOutput, zone.internalGainsConv) annotation (Line(
-      points={{30,-16},{60,-16},{60,43.4}},
+      points={{30,-22},{60,-22},{60,43.4}},
       color={191,0,0},
       smooth=Smooth.None));
   connect(TAirAHUAvg.port, splitterThermPercentAir.signalInput) annotation (
       Line(
-      points={{16,-16},{22,-16}},
+      points={{16,-22},{22,-22}},
       color={191,0,0},
       smooth=Smooth.None));
   connect(AirHandlingUnit.T_outdoorAir, weather[1]) annotation (Line(
@@ -140,10 +143,6 @@ equation
       points={{-56,105},{-56,5.55556},{-49.44,5.55556}},
       color={0,0,127},
       smooth=Smooth.None));
-  connect(TAirAHUAvg.T, AirHandlingUnit.T_extractAir) annotation (Line(
-      points={{8,-16},{4,-16},{4,-4},{22,-4},{22,25.7778},{15.92,25.7778}},
-      color={0,0,127},
-      smooth=Smooth.None));
   connect(AHU[1], AirHandlingUnit.T_supplyAir) annotation (Line(
       points={{-100,-1},{-100,-2},{20,-2},{20,11},{15.92,11}},
       color={0,0,127},
@@ -165,24 +164,27 @@ equation
       points={{-100,-21},{-100,-2},{18,-2},{18,6},{15.92,6},{15.92,6.33333}},
       color={0,0,127},
       smooth=Smooth.None));
-  connect(TSetCooler, heaterCooler.setPointCool) annotation (Line(points={{-48,-100},
-          {-48,-66},{-22.12,-66},{-22.12,-50.36}}, color={0,0,127}));
-  connect(TSetHeater, heaterCooler.setPointHeat) annotation (Line(points={{-20,-100},
-          {-22,-100},{-22,-68},{-16.14,-68},{-16.14,-50.36}}, color={0,0,127}));
+  connect(TSetCooler, heaterCooler.setPointCool) annotation (Line(points={{-48,
+          -100},{-48,-66},{-22.12,-66},{-22.12,-62.36}},
+                                                   color={0,0,127}));
+  connect(TSetHeater, heaterCooler.setPointHeat) annotation (Line(points={{-20,
+          -100},{-22,-100},{-22,-68},{-16.14,-68},{-16.14,-62.36}},
+                                                              color={0,0,127}));
   connect(heaterCooler.heatCoolRoom, zone.internalGainsConv) annotation (Line(
-        points={{-7.3,-46.2},{60,-46.2},{60,43.4}},
+        points={{-7.3,-58.2},{26,-58.2},{26,-52},{60,-52},{60,43.4}},
                                                   color={191,0,0}));
   connect(AirHandlingUnit.Pel, Pel) annotation (Line(points={{7.94,2.05556},{8,
           2.05556},{8,2},{56,2},{80,2},{80,16},{104,16}},
                                                  color={0,0,127}));
   connect(AirHandlingUnit.QflowH, HeatingPowerAHU) annotation (Line(points={{-0.42,
           2.05556},{-0.42,-6},{80,-6},{80,-4},{104,-4}}, color={0,0,127}));
   connect(AirHandlingUnit.QflowC, CoolingPowerAHU) annotation (Line(points={{-17.14,
-          2.05556},{-17.14,-20},{80,-20},{80,-22},{104,-22}}, color={0,0,127}));
+          2.05556},{-17.14,-14},{-17,-14},{-17,-32},{83,-32},{83,-22},{104,-22}},
+                                                              color={0,0,127}));
   connect(heaterCooler.HeatingPower, HeatingPowerHeater) annotation (Line(
-        points={{-6,-35.8},{38,-35.8},{38,-42},{100,-42}}, color={0,0,127}));
+        points={{-6,-47.8},{38,-47.8},{38,-42},{100,-42}}, color={0,0,127}));
   connect(heaterCooler.CoolingPower, CoolingPowerCooler) annotation (Line(
-        points={{-6,-41.78},{12,-41.78},{12,-42},{36,-42},{36,-66},{104,-66}},
+        points={{-6,-53.78},{12,-53.78},{12,-54},{36,-54},{36,-66},{104,-66}},
         color={0,0,127}));
   connect(splitterVolumeFlowVentilation.y, zone.ventilationRate) annotation (
       Line(
@@ -196,17 +198,22 @@ equation
   connect(conversion.u, AirHandlingUnit.Vflow_out) annotation (Line(points={{48,5.2},
           {48,4},{28,4},{28,28},{-60,28},{-60,21.8889},{-52.48,21.8889}},
         color={0,0,127}));
+  connect(TAirAHUAvg.T, minTemp.u)
+    annotation (Line(points={{8,-22},{1,-22}}, color={0,0,127}));
+  connect(minTemp.y, AirHandlingUnit.T_extractAir) annotation (Line(points={{
+          -10.5,-22},{-14,-22},{-14,-12},{26,-12},{26,25.7778},{15.92,25.7778}},
+        color={0,0,127}));
   annotation (
-    Diagram(coordinateSystem(preserveAspectRatio=false, extent={{-100,-100},{100,
-            100}}),
+    Diagram(coordinateSystem(preserveAspectRatio=false, extent={{-100,-100},{
+            100,100}}),
             graphics={
         Rectangle(
-          extent={{-66,30},{32,-24}},
+          extent={{-66,30},{32,-40}},
           lineColor={0,0,255},
           fillPattern=FillPattern.Solid,
           fillColor={212,221,253}),
         Rectangle(
-          extent={{-66,-26},{32,-70}},
+          extent={{-66,-42},{32,-70}},
           lineColor={0,0,255},
           fillColor={255,170,170},
           fillPattern=FillPattern.Solid),

AixLib/package.mo

@@ -1,6 +1,6 @@
 within ;
 package AixLib
-  annotation(uses(Modelica(version = "3.2.1")), version = "0.2.1", Documentation(info = "<html>
+  annotation(uses(Modelica(version = "3.2.1")), version = "0.2.2", Documentation(info = "<html>
  <p>The free open-source <code>AixLib</code> library is being developed for research and teaching purposes. It aims at dynamic simulations of thermal and hydraulic systems to develop control strategies for HVAC systems and analyse interactions in complex systems. It is used for simulations on component, building and city district level. As this library is developed mainly for academic purposes, user-friendliness and model robustness is not a main task. This research focus thus influences the layout and philosophy of the library. </p>
  <p>Various connectors of the Modelica Standard Library are used, e.g. <code>Modelica.Fluid</code> and <code>Modelica.HeatTransfer</code>. These are accompanied by own connectors for simplified hydraulics (no <code>fluid.media</code>, incompressible, one phase) , shortwave radiation (intensity), longwave radiation (heat flow combined with a virtual temperature) and combined longwave radiation and thermal. The pressure in the connectors is the total pressure. The used media models are simplified from the <code>Modelica.Media</code> library. If possible and necessary, components use continuously differentiable equations. In general, zero mass flow rate and reverse flow are supported.</p>
  <p>Most models have been analytically verified. In addition, hydraulic components are compared to empirical data such as performance curves. High and low order building models have been validated using a standard test suite provided by the ANSI/ASHRAE Standard 140 and VDI 6007 Guideline. The library has only been tested with Dymola.</p>