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Merge pull request #3525 from lbl-srg/issue3063_dhwLoaDisHea
Closes #3063
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...erimental/DHC/EnergyTransferStations/Combined/BaseClasses/PartialHeatPumpHeatExchanger.mo
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Buildings/Experimental/DHC/EnergyTransferStations/Combined/BaseClasses/package.order
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| @@ -1 +1,2 @@ | ||
| PartialHeatPumpHeatExchanger | ||
| PartialParallel |
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Buildings/Experimental/DHC/EnergyTransferStations/Combined/HeatPumpHeatExchanger.mo
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Buildings/Experimental/DHC/EnergyTransferStations/Combined/HeatPumpHeatExchangerDHWTank.mo
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| within Buildings.Experimental.DHC.EnergyTransferStations.Combined; | ||
| model HeatPumpHeatExchangerDHWTank | ||
| "Model of a substation with heat pump for heating, heat pump with storage tank for domestic hot water, and compressor-less cooling" | ||
| extends | ||
| Buildings.Experimental.DHC.EnergyTransferStations.Combined.BaseClasses.PartialHeatPumpHeatExchanger( | ||
| volMix_b(nPorts=4), | ||
| volMix_a(nPorts=4)); | ||
| Buildings.Fluid.Sources.Boundary_pT souDCW( | ||
| redeclare final package Medium = MediumBui, | ||
| use_T_in=true, | ||
| nPorts=1) if have_hotWat "Source for domestic cold water" | ||
| annotation (Placement( | ||
| transformation( | ||
| extent={{10,-10},{-10,10}}, | ||
| rotation=180, | ||
| origin={-52,-56}))); | ||
| Buildings.Experimental.DHC.EnergyTransferStations.Combined.Subsystems.HeatPumpDHWTank proHotWat( | ||
| redeclare final package Medium1 = MediumBui, | ||
| redeclare final package Medium2 = MediumSer, | ||
| final COP_nominal=COPHotWat_nominal, | ||
| TCon_nominal=THotWatSup_nominal, | ||
| TEva_nominal=TDisWatMin - dT_nominal, | ||
| QHotWat_flow_nominal=QHotWat_flow_nominal, | ||
| dT_nominal=dT_nominal, | ||
| final allowFlowReversal1=allowFlowReversalBui, | ||
| final allowFlowReversal2=allowFlowReversalSer, | ||
| dp1_nominal=6000, | ||
| dp2_nominal=6000, | ||
| datWatHea=datWatHea) if have_hotWat | ||
| "Subsystem for hot water production" | ||
| annotation (Placement(transformation(extent={{30,24},{50,44}}))); | ||
| parameter Buildings.Experimental.DHC.Loads.HotWater.Data.GenericDomesticHotWaterWithHeatExchanger | ||
| datWatHea "Performance data" | ||
| annotation (Placement(transformation(extent={{36,48},{48,60}}))); | ||
| Buildings.Experimental.DHC.Loads.HotWater.ThermostaticMixingValve theMixVal( | ||
| redeclare package Medium = MediumBui, | ||
| mMix_flow_nominal=QHotWat_flow_nominal/cpBui_default/(THotWatSup_nominal - TColWat_nominal)) | ||
| if have_hotWat | ||
| "Thermostatic mixing valve" | ||
| annotation (Placement(transformation(extent={{-20,50},{-40,72}}))); | ||
| Buildings.Experimental.DHC.EnergyTransferStations.BaseClasses.Junction dcwSpl( | ||
| redeclare final package Medium = MediumBui, final m_flow_nominal= | ||
| datWatHea.mDom_flow_nominal*{1,-1,-1}) | ||
| "Splitter for domestic cold water" | ||
| annotation (Placement(transformation( | ||
| extent={{-10,-10},{10,10}}, | ||
| rotation=90, | ||
| origin={-10,0}))); | ||
| Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai( | ||
| k=1/QHotWat_flow_nominal) if have_hotWat | ||
| annotation (Placement(transformation(extent={{-80,50},{-60,70}}))); | ||
| equation | ||
|
|
||
| connect(proHotWat.port_b2, volMix_b.ports[4]) | ||
| annotation (Line(points={{30,28},{28,28},{28,0},{260,0},{260,-360}}, | ||
| color={0,127,255})); | ||
| connect(proHotWat.PHea, PHeaTot.u[2]) annotation (Line(points={{52,37},{66,37}, | ||
| {66,38},{268,38},{268,80.5}}, | ||
| color={0,0,127})); | ||
| connect(proHotWat.PPum, PPumHeaTot.u[2]) annotation (Line(points={{52,34},{ | ||
| 176,34},{176,420.5},{188,420.5}}, | ||
| color={0,0,127})); | ||
| connect(proHotWat.mEva_flow, masFloHeaTot.u[2]) annotation (Line(points={{52,31}, | ||
| {68,31},{68,30},{256,30},{256,-139.5},{268,-139.5}}, | ||
| color={0,0,127})); | ||
| connect(proHotWat.mEva_flow, masFloHea.u2) annotation (Line(points={{52,31},{ | ||
| 58,31},{58,-242},{-6,-242},{-6,-252}}, | ||
| color={0,0,127})); | ||
| connect(proHotWat.port_a2, volMix_a.ports[4]) annotation (Line(points={{50,28}, | ||
| {54,28},{54,20},{-260,20},{-260,-360}}, color={0,127,255})); | ||
| connect(souDCW.ports[1], dcwSpl.port_1) annotation (Line(points={{-42,-56},{ | ||
| -10,-56},{-10,-10}},color={0,127,255})); | ||
| connect(dcwSpl.port_3, proHotWat.port_a1) | ||
| annotation (Line(points={{0,-6.66134e-16},{10,-6.66134e-16},{10,40},{30,40}}, | ||
| color={0,127,255})); | ||
| connect(dcwSpl.port_2, theMixVal.port_col) annotation (Line(points={{-10,10}, | ||
| {-10,52.2},{-20,52.2}}, color={0,127,255})); | ||
| connect(proHotWat.port_b1, theMixVal.port_hot) annotation (Line(points={{50,40}, | ||
| {60,40},{60,80},{0,80},{0,56.6},{-20,56.6}}, | ||
| color={0,127,255})); | ||
| connect(souDCW.T_in, TColWat) annotation (Line(points={{-64,-60},{-156,-60},{ | ||
| -156,-80},{-320,-80}}, color={0,0,127})); | ||
| connect(THotWatSupSet, theMixVal.TMixSet) annotation (Line(points={{-320,-40}, | ||
| {-32,-40},{-32,32},{-6,32},{-6,64},{-14,64},{-14,63.2},{-19,63.2}}, | ||
| color={0,0,127})); | ||
| connect(QReqHotWat_flow, gai.u) annotation (Line(points={{-320,-120},{-288,-120}, | ||
| {-288,60},{-82,60}}, | ||
| color={0,0,127})); | ||
| connect(gai.y, theMixVal.yMixSet) annotation (Line(points={{-58,60},{-48,60}, | ||
| {-48,78},{-6,78},{-6,70},{-12,70},{-12,69.8},{-19,69.8}}, | ||
| color={0,0,127})); | ||
| connect(enaSHW.y, proHotWat.uEna) annotation (Line(points={{-118,80},{-108,80}, | ||
| {-108,43},{28,43}}, color={255,0,255})); | ||
| annotation ( | ||
| Documentation(info="<html> | ||
| <p> | ||
| This model uses the base energy transfer station defined in | ||
| <a href=\"modelica://Buildings.Experimental.DHC.EnergyTransferStations.Combined.BaseClasses.PartialHeatPumpHeatExchanger\"> | ||
| Buildings.Experimental.DHC.EnergyTransferStations.Combined.BaseClasses.PartialHeatPumpHeatExchanger</a>. | ||
| </p> | ||
| <h4>Domestic Hot Water</h4> | ||
| <p> | ||
| Domestic hot water is produced using a dedicated water-to-water heat pump | ||
| with storage tank. | ||
| </p> | ||
| <p> | ||
| Heating is enabled based on the input signal <code>uSHW</code> | ||
| which is held for <i>15</i> minutes, meaning that, | ||
| when enabled, the mode remains active for at least <i>15</i> minutes and, | ||
| when disabled, the mode cannot be enabled again for at least <i>15</i> minutes. | ||
| The enable signal should be computed externally based | ||
| on a schedule (to lock out the system during off-hours), ideally in conjunction | ||
| with the number of requests or any other signal representative of the load. | ||
| </p> | ||
| <p> | ||
| When enabled, | ||
| </p> | ||
| <ul> | ||
| <li> | ||
| The heat pump and the evaporator and condenser hydronics are controlled | ||
| based on the principles described in | ||
| <a href=\"modelica://Buildings.Experimental.DHC.EnergyTransferStations.Combined.Subsystems.HeatPumpDHWTank\"> | ||
| Buildings.Experimental.DHC.EnergyTransferStations.Combined.Subsystems.HeatPumpDHWTank</a>. | ||
| </li> | ||
| <li> | ||
| The mass flow rate of water leaving the domestic hot water heat exchanger is computed based on the domestic hot water | ||
| heating load (input <code>QReqHotWat_flow</code>) combined with the operation of a thermostatic | ||
| mixing valve used to mix down the temperature of hot water leaving the domestic hot water heat exchanger | ||
| to the temperature distributed to fixtures (parameter <code>THotWatSup_nominal</code>) | ||
| using domestic cold water at the cold water temperature (input <code>TColWat</code>). | ||
| The desired water flow rate leaving the thermostatic mixing valve | ||
| is determined according to the following equation: | ||
| <p align=\"center\" style=\"font-style:italic;\"> | ||
| <code>QReqHotWat_flow</code> = ṁ cp (<code>THotWatSup_nominal</code> - <code>TColWat</code>) | ||
| </p> | ||
| </li> | ||
| </ul> | ||
| </html>", | ||
| revisions="<html> | ||
| <ul> | ||
| <li> | ||
| September 13, 2023, by David Blum:<br/> | ||
| First implementation, extended from partial base class. | ||
| This is for | ||
| <a href=\"https://github.com/lbl-srg/modelica-buildings/issues/3063\"> | ||
| issue 3063</a>. | ||
| </li> | ||
| </ul> | ||
| </html>"), Icon(graphics={ | ||
| Rectangle( | ||
| extent={{-70,36},{-68,26}}, | ||
| lineColor={0,0,255}, | ||
| pattern=LinePattern.None, | ||
| fillColor={175,175,175}, | ||
| fillPattern=FillPattern.Solid), | ||
| Rectangle( | ||
| extent={{-1.5,5.5},{1.5,-5.5}}, | ||
| lineColor={0,0,255}, | ||
| pattern=LinePattern.None, | ||
| fillColor={175,175,175}, | ||
| fillPattern=FillPattern.Solid, | ||
| origin={-13.5,26.5}, | ||
| rotation=90)})); | ||
| end HeatPumpHeatExchangerDHWTank; |
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