Merge pull request #1401 from open-ideas/issue1400_VentilationTemplate

jelgerjansen · web-flow · commit 6ad3d700cf97 · 2025-02-04T18:14:21.000+01:00
Issue1400 Ventilation template update
diff --git a/IDEAS/Templates/Examples/ConstantAirFlowRecup.mo b/IDEAS/Templates/Examples/ConstantAirFlowRecup.mo
@@ -11,10 +11,9 @@ model ConstantAirFlowRecup
   IDEAS.Templates.Structure.ThreeZone structure(
     redeclare package Medium = Medium)
     annotation (Placement(transformation(extent={{-80,-40},{-50,-20}})));
-  replaceable IDEAS.Templates.Ventilation.ConstantAirFlowRecup constantAirFlowRecup(
-    n=2.*structure.VZones)
+  replaceable IDEAS.Templates.Ventilation.ConstantAirFlowRecup constantAirFlowRecup(nZones=structure.nZones, n=2.*ones(structure.nZones))
   constrainedby IDEAS.Templates.Interfaces.BaseClasses.VentilationSystem(
-    nZones=3,
+    nZones=structure.nZones,
     VZones=structure.VZones,
     redeclare package Medium = Medium)
     annotation (Placement(transformation(extent={{-38,-10},{-2,8}})));
diff --git a/IDEAS/Templates/Interfaces/BaseClasses/VentilationSystem.mo b/IDEAS/Templates/Interfaces/BaseClasses/VentilationSystem.mo
@@ -7,12 +7,10 @@ partial model VentilationSystem
     constrainedby Modelica.Media.Interfaces.PartialMedium
     "Medium in the component"
       annotation (choicesAllMatching = true);
-  parameter Integer nZones(min=1)
-    "Number of conditioned thermal building zones";
   parameter Real[nZones] VZones "Conditioned volumes of the zones";
-
   parameter Modelica.Units.SI.Power[nZones] Q_design=zeros(nZones)
     "Design heat loss due to ventilation";//must be calculated depending on the case
+
   Modelica.Blocks.Interfaces.RealInput[nZones] TSensor(
     each final quantity="ThermodynamicTemperature",
     each unit="K",
@@ -59,6 +57,11 @@ partial model VentilationSystem
     Documentation(revisions="<html>
 <ul>
 <li>
+December 23, 2024, by Lucas Verleyen:<br>
+Removed nZones parameter, since it is already declared in PartialSystem, from which this model extends.
+See <a href=\"https://github.com/open-ideas/IDEAS/pull/1401\">#1401</a>.
+</li>
+<li>
 May 22, 2022, by Filip Jorissen:<br/>
 Fixed Modelica specification compatibility issue.
 See <a href=\"https://github.com/open-ideas/IDEAS/issues/1254\">
diff --git a/IDEAS/Templates/Ventilation/ConstantAirFlowRecup.mo b/IDEAS/Templates/Ventilation/ConstantAirFlowRecup.mo
@@ -8,7 +8,7 @@ model ConstantAirFlowRecup
 
   parameter Real[nZones] n
     "Air change rate (Air changes per hour ACH)";
-  final parameter Modelica.Units.SI.MassFlowRate m_flow_nominal=sum(n)/3600*
+  final parameter Modelica.Units.SI.MassFlowRate m_flow_nominal=sum(n .* VZones)/3600*
       1.204 "total ventilation mass flow rate";
   parameter Modelica.Units.SI.Time tau=30
     "time constant of the ventilation system";
@@ -26,11 +26,15 @@ model ConstantAirFlowRecup
     min=0,
     max=1) = 0.80 "Motor efficiency";
 
+  parameter Modelica.Units.SI.Pressure dp_nominal_sup=0
+    "Nominal pressure drop in the heat exchanger at the supply side";
+  parameter Modelica.Units.SI.Pressure dp_nominal_ret=0
+    "Nominal pressure drop in the heat exchanger at the return side";
   IDEAS.Fluid.HeatExchangers.ConstantEffectiveness hex(
     m1_flow_nominal=m_flow_nominal,
     m2_flow_nominal=m_flow_nominal,
-    dp1_nominal=0,
-    dp2_nominal=0,
+    dp1_nominal=dp_nominal_ret,
+    dp2_nominal=dp_nominal_sup,
     redeclare package Medium1 = Medium,
     redeclare package Medium2 = Medium,
     eps=recupEff) "Heat exchanger for the recuperator"
@@ -46,7 +50,7 @@ model ConstantAirFlowRecup
     annotation (Placement(transformation(extent={{-80,-30},{-100,-10}})));
   IDEAS.Fluid.Movers.FlowControlled_m_flow fan[nZones](
     each use_riseTime=false,
-    m_flow_nominal=n ./ 3600.*1.204,
+    m_flow_nominal=n .* VZones ./ 3600.*1.204,
     redeclare each package Medium = Medium,
     each energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState,
     each inputType=IDEAS.Fluid.Types.InputType.Constant)
@@ -94,6 +98,11 @@ equation
     Documentation(revisions="<html>
 <ul>
 <li>
+December 17, 2024, by Anna Dell'Isola:<br/>
+Update calculation of ventilation mass flow rate and addition of nominal pressure drops in heat exchanger.
+See <a href=\"https://github.com/open-ideas/IDEAS/issues/1400\">#1400</a>
+</li>
+<li>
 October 30, 2024, by Lucas Verleyen:<br/>
 Updates according to <a href=\"https://github.com/ibpsa/modelica-ibpsa/tree/8ed71caee72b911a1d9b5a76e6cb7ed809875e1e\">IBPSA</a>.<br/>
 See <a href=\"https://github.com/open-ideas/IDEAS/pull/1383\">#1383</a> 
