Buildings.DHC.ETS.Combined.BaseClasses
Package with base classes
Information
This package contains base classes that are used to construct the classes in Buildings.DHC.ETS.Combined.
Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).
Package Content
| Name | Description |
|---|---|
 PartialHeatPumpHeatExchanger
|
Partial model of a substation with heat pump and compressor-less cooling |
Buildings.DHC.ETS.Combined.BaseClasses.PartialHeatPumpHeatExchanger
Partial model of a substation with heat pump and compressor-less cooling
Information
This model represents an energy transfer station based on that described in Sommer (2020), with some additioinal details:
The cooling function is provided in a compressor-less mode by a heat exchanger connected to the district supply line.
- The cooling heat exchanger primary pump is modulated based on a PI control loop tracking the chilled water supply temperature at the outlet of the heat exchanger secondary side.
- The chilled water is typically produced at high temperature and distributed to radiant cooling systems, for instance at 19°C.
The space heating heating function is provided by a water-to-water heat pump Buildings.DHC.ETS.Combined.Subsystems.HeatPump.
-
By default, the condenser loop is operated
with a variable mass flow rate to maintain a difference between supply and
return water of
dT_nominal, with a lower limit of mass flow specified by the ratioratFloMin. The control logic is implemented and described in Buildings.DHC.ETS.Combined.Controls.PrimaryVariableFlow. The model can also represent a constant flow condenser loop by settinghave_varFloContofalse. - The evaporator loop is controlled according to the documentation in Buildings.DHC.ETS.Combined.Subsystems.HeatPump. Evaporator water is supplied by mixing flow directly from the district line with flow leaving the district side of the cooling heat exchanger. The hydronic arrangement modeled in Buildings.DHC.ETS.Combined.Subsystems.SwitchBox ensures that the resulting fluid stream in the district line always flows in the same direction.
- The space heating hot water is typically produced at low temperature, for instance 40°C.
Space Heating and Cooling Enable/Disable
Heating (resp. cooling) is enabled based on the input signal uHea
(resp. uCoo) which is held for 15 minutes, meaning that,
when enabled, the mode remains active for at least 15 minutes and,
when disabled, the mode cannot be enabled again for at least 15 minutes.
The heating and cooling enable signals should be computed externally based
on a schedule (to lock out the system during off-hours), ideally in conjunction
with the number of requests yielded by the terminal unit controllers, or any
other signal representative of the load.
Modeling considerations
There is a control volume at each of the two fluid ports that serve as inlet and outlet of the heating and cooling systems. These approximate the dynamics of the substation, and they also generally avoid nonlinear systems of equations if multiple substations are connected to each other.
References
Sommer T., Sulzer M., Wetter M., Sotnikov A., Mennel S., Stettler C. The reservoir network: A new network topology for district heating and cooling. Energy, Volume 199, 15 May 2020, 117418.
Extends from Buildings.DHC.ETS.BaseClasses.PartialETS (Partial class for modeling an energy transfer station).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package MediumSer | Water | Service side medium | |
| replaceable package MediumSerHea_a | Water | Service side medium at heating inlet | |
| replaceable package MediumBui | Water | Building side medium | |
| Generic | fue[nFue] | Fuel type | |
| Boolean | have_varFloCon | true | Set to true for heat pumps with variable condenser flow |
| Boolean | have_varFloEva | true | Set to true for heat pumps with variable evaporator flow |
| Real | ratFloMin | 0.3 | Minimum condenser mass flow rate (ratio to nominal) [1] |
| Configuration | |||
| DistrictSystemType | typ | Buildings.DHC.Types.District... | Type of district system |
| Boolean | have_heaWat | true | Set to true if the ETS supplies heating water |
| Boolean | have_hotWat | false | Set to true if the ETS supplies hot water |
| Boolean | have_chiWat | true | Set to true if the ETS supplies chilled water |
| Boolean | have_fan | false | Set to true if fan power is computed |
| Boolean | have_pum | true | Set to true if pump power is computed |
| Boolean | have_eleHea | true | Set to true if the ETS has electric heating system |
| Integer | nFue | 0 | Number of fuel types (0 means no combustion system) |
| Boolean | have_eleCoo | false | Set to true if the ETS has electric cooling system |
| Boolean | have_weaBus | false | Set to true to use a weather bus |
| Nominal condition | |||
| HeatFlowRate | QHeaWat_flow_nominal | 0 | Nominal capacity of heating system (>=0) [W] |
| HeatFlowRate | QHotWat_flow_nominal | 0 | Nominal capacity of hot water production system (>=0) [W] |
| HeatFlowRate | QChiWat_flow_nominal | 0 | Nominal capacity of cooling system (<=0) [W] |
| TemperatureDifference | dT_nominal | 5 | Water temperature drop/increase accross load and source-side HX (always positive) [K] |
| Temperature | THeaWatSup_nominal | 313.15 | Heating water supply temperature [K] |
| Temperature | THotWatSup_nominal | 336.15 | Domestic hot water supply temperature to fixtures [K] |
| Temperature | TColWat_nominal | 288.15 | Cold water temperature (for hot water production) [K] |
| Pressure | dp_nominal | 50000 | Pressure difference at nominal flow rate (for each flow leg) [Pa] |
| Real | COPHeaWat_nominal | COP of heat pump for heating water production [1] | |
| Real | COPHotWat_nominal | COP of heat pump for hot water production [1] | |
| DHC system | |||
| Temperature | TDisWatMin | District water minimum temperature [K] | |
| Temperature | TDisWatMax | District water maximum temperature [K] | |
| Nominal conditions | |||
| Temperature | TChiWatSup_nominal | 291.15 | Chilled water supply temperature [K] |
| Assumptions | |||
| Boolean | allowFlowReversalSer | false | Set to true to allow flow reversal on service side |
| Boolean | allowFlowReversalBui | false | Set to true to allow flow reversal on building side |
| Dynamics | |||
| Dynamics | mixingVolumeEnergyDynamics | Modelica.Fluid.Types.Dynamic... | Formulation of energy balance for mixing volume at inlet and outlet |
Connectors
| Type | Name | Description |
|---|---|---|
| FluidPorts_a | ports_aHeaWat[nPorts_aHeaWat] | Fluid connectors for heating water return (from building) |
| FluidPorts_b | ports_bHeaWat[nPorts_bHeaWat] | Fluid connectors for heating water supply (to building) |
| FluidPorts_a | ports_aChiWat[nPorts_aChiWat] | Fluid connectors for chilled water return (from building) |
| FluidPorts_b | ports_bChiWat[nPorts_bChiWat] | Fluid connectors for chilled water supply (to building) |
| FluidPort_a | port_aSerAmb | Fluid connector for ambient water service supply line |
| FluidPort_b | port_bSerAmb | Fluid connector for ambient water service return line |
| FluidPort_a | port_aSerHea | Fluid connector for heating service supply line |
| FluidPort_b | port_bSerHea | Fluid connector for heating service return line |
| FluidPort_a | port_aSerCoo | Fluid connector for cooling service supply line |
| FluidPort_b | port_bSerCoo | Fluid connector for cooling service return line |
| output RealOutput | PHea | Power drawn by heating system [W] |
| output RealOutput | PCoo | Power drawn by cooling system [W] |
| output RealOutput | PFan | Power drawn by fan motors [W] |
| output RealOutput | PPum | Power drawn by pump motors [W] |
| output RealOutput | QFue_flow[nFue] | Fuel energy input rate [W] |
| Bus | weaBus | Weather data bus |
| input BooleanInput | uCoo | Cooling enable signal |
| input BooleanInput | uHea | Heating enable signal |
| input BooleanInput | uSHW | SHW production enable signal |
| input RealInput | THeaWatSupSet | Heating water supply temperature set point [K] |
| input RealInput | THotWatSupSet | Domestic hot water temperature set point for supply to fixtures [K] |
| input RealInput | TColWat | Cold water temperature [K] |
| input RealInput | QReqHotWat_flow | Service hot water load [W] |
| input RealInput | TChiWatSupSet | Chilled water supply temperature set point [K] |
| output RealOutput | mHea_flow | District water mass flow rate used for heating service [kg/s] |
| output RealOutput | mCoo_flow | District water mass flow rate used for cooling service [kg/s] |
Modelica definition
model PartialHeatPumpHeatExchanger
"Partial model of a substation with heat pump and compressor-less cooling"
extends Buildings.DHC.ETS.BaseClasses.PartialETS
(
final typ=Buildings.DHC.Types.DistrictSystemType.CombinedGeneration5,
final have_weaBus=false,
final have_chiWat=true,
final have_heaWat=true,
have_hotWat=false,
final have_eleHea=true,
final nFue=0,
final have_eleCoo=false,
final have_pum=true,
final have_fan=false,
nPorts_aHeaWat=1,
nPorts_aChiWat=1);
// SYSTEM GENERAL
parameter Boolean have_varFloCon = true
"Set to true for heat pumps with variable condenser flow";
parameter Boolean have_varFloEva = true
"Set to true for heat pumps with variable evaporator flow";
parameter Real ratFloMin(
final unit="1",
final min=0,
final max=1)=0.3
"Minimum condenser mass flow rate (ratio to nominal)";
parameter Modelica.Units.SI.Temperature TDisWatMin
"District water minimum temperature";
parameter Modelica.Units.SI.Temperature TDisWatMax
"District water maximum temperature";
parameter Modelica.Units.SI.TemperatureDifference dT_nominal(min=0) = 5
"Water temperature drop/increase accross load and source-side HX (always positive)";
parameter Modelica.Units.SI.Temperature TChiWatSup_nominal=291.15
"Chilled water supply temperature";
final parameter Modelica.Units.SI.Temperature TChiWatRet_nominal=
TChiWatSup_nominal + dT_nominal "Chilled water return temperature";
parameter Modelica.Units.SI.Temperature THeaWatSup_nominal=313.15
"Heating water supply temperature";
final parameter Modelica.Units.SI.Temperature THeaWatRet_nominal=
THeaWatSup_nominal - dT_nominal "Heating water return temperature";
parameter Modelica.Units.SI.Temperature THotWatSup_nominal=336.15
"Domestic hot water supply temperature to fixtures";
parameter Modelica.Units.SI.Temperature TColWat_nominal=288.15
"Cold water temperature (for hot water production)";
parameter Modelica.Units.SI.Pressure dp_nominal(displayUnit="Pa") = 50000
"Pressure difference at nominal flow rate (for each flow leg)";
final parameter Modelica.Units.SI.MassFlowRate mHeaWat_flow_nominal(min=0)=
abs(QHeaWat_flow_nominal/cpBui_default/(THeaWatSup_nominal - THeaWatRet_nominal))
"Heating water mass flow rate";
final parameter Modelica.Units.SI.MassFlowRate mChiWat_flow_nominal(min=0)=
abs(QChiWat_flow_nominal/cpBui_default/(TChiWatSup_nominal - TChiWatRet_nominal))
"Chilled water mass flow rate";
final parameter Modelica.Units.SI.MassFlowRate mEvaHotWat_flow_nominal(min=0)=
QHotWat_flow_nominal*(COPHotWat_nominal - 1)/COPHotWat_nominal/cpSer_default/dT_nominal
"Evaporator water mass flow rate of heat pump for hot water production";
final parameter Modelica.Units.SI.MassFlowRate mSerWat_flow_nominal(min=0)=
max(proHeaWat.mCon_flow_nominal + mEvaHotWat_flow_nominal, hexChi.m1_flow_nominal)
"Service water mass flow rate";
constant Modelica.Units.SI.SpecificHeatCapacity cpBui_default=
MediumBui.specificHeatCapacityCp(MediumBui.setState_pTX(
p=MediumBui.p_default,
T=MediumBui.T_default)) "Specific heat capacity of the fluid";
constant Modelica.Units.SI.SpecificHeatCapacity cpSer_default=
MediumBui.specificHeatCapacityCp(MediumSer.setState_pTX(
p=MediumSer.p_default,
T=MediumSer.T_default)) "Specific heat capacity of the fluid";
// Heat pump for heating water production
parameter Real COPHeaWat_nominal(final unit="1")
"COP of heat pump for heating water production";
// Heat pump for hot water production
parameter Real COPHotWat_nominal(final unit="1")
"COP of heat pump for hot water production";
// District HX
final parameter Modelica.Units.SI.MassFlowRate m1HexChi_flow_nominal(min=0)=
abs(QChiWat_flow_nominal/cpSer_default/dT_nominal)
"CHW HX primary mass flow rate";
final parameter Modelica.Units.SI.MassFlowRate m2HexChi_flow_nominal(min=0)=
abs(QChiWat_flow_nominal/cpSer_default/(THeaWatSup_nominal -
THeaWatRet_nominal)) "CHW HX secondary mass flow rate";
// Dynamics
parameter Modelica.Fluid.Types.Dynamics mixingVolumeEnergyDynamics=
Modelica.Fluid.Types.Dynamics.FixedInitial
"Formulation of energy balance for mixing volume at inlet and outlet";
// IO CONNECTORS
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uCoo
"Cooling enable signal";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uHea
"Heating enable signal";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uSHW if have_hotWat
"SHW production enable signal";
Buildings.Controls.OBC.CDL.Interfaces.RealInput THeaWatSupSet(
final unit="K",
displayUnit="degC")
"Heating water supply temperature set point";
Buildings.Controls.OBC.CDL.Interfaces.RealInput THotWatSupSet(
final unit="K",
displayUnit="degC") if have_hotWat
"Domestic hot water temperature set point for supply to fixtures";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TColWat(
final unit="K",
displayUnit="degC") if have_hotWat
"Cold water temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput QReqHotWat_flow(
final unit="W") if have_hotWat "Service hot water load";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TChiWatSupSet(final unit="K",
displayUnit="degC")
"Chilled water supply temperature set point";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput mHea_flow(final unit="kg/s")
"District water mass flow rate used for heating service";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput mCoo_flow(final unit="kg/s")
"District water mass flow rate used for cooling service";
// COMPONENTS
Buildings.Fluid.Delays.DelayFirstOrder volMix_a(
redeclare final package Medium = MediumSer,
final m_flow_nominal=mSerWat_flow_nominal,
tau=600,
final energyDynamics=mixingVolumeEnergyDynamics)
"Mixing volume to break algebraic loops and to emulate the delay of the substation";
Buildings.Fluid.Delays.DelayFirstOrder volMix_b(
redeclare final package Medium = MediumSer,
final m_flow_nominal=mSerWat_flow_nominal,
tau=600,
final energyDynamics=mixingVolumeEnergyDynamics)
"Mixing volume to break algebraic loops and to emulate the delay of the substation";
Buildings.DHC.ETS.BaseClasses.Pump_m_flow pum1HexChi(
redeclare final package Medium = MediumSer,
final m_flow_nominal=m1HexChi_flow_nominal,
final allowFlowReversal=allowFlowReversalSer,
dp_nominal=dp_nominal)
"Chilled water HX primary pump";
Buildings.Fluid.HeatExchangers.DryCoilEffectivenessNTU hexChi(
redeclare final package Medium1 = MediumSer,
redeclare final package Medium2 = MediumBui,
final m1_flow_nominal=m1HexChi_flow_nominal,
final m2_flow_nominal=m2HexChi_flow_nominal,
final dp1_nominal=dp_nominal/2,
final dp2_nominal=dp_nominal/2,
configuration=Buildings.Fluid.Types.HeatExchangerConfiguration.CounterFlow,
final Q_flow_nominal=QChiWat_flow_nominal,
final T_a1_nominal=TDisWatMax,
final T_a2_nominal=TChiWatRet_nominal,
final allowFlowReversal1=allowFlowReversalSer,
final allowFlowReversal2=allowFlowReversalBui)
"Chilled water HX";
Buildings.Fluid.Delays.DelayFirstOrder volHeaWatRet(
redeclare final package Medium = MediumBui,
final m_flow_nominal=proHeaWat.mCon_flow_nominal,
tau=60,
final energyDynamics=mixingVolumeEnergyDynamics,
T_start=THeaWatSup_nominal,
nPorts=3) "Mixing volume representing building HHW primary";
Buildings.Fluid.Sensors.MassFlowRate senMasFloHeaWat(
redeclare final package Medium = MediumBui,
final allowFlowReversal=allowFlowReversalBui)
"Heating water mass flow rate";
Buildings.Fluid.Delays.DelayFirstOrder volChiWat(
redeclare final package Medium = MediumBui,
final m_flow_nominal=m1HexChi_flow_nominal,
tau=60,
final energyDynamics=mixingVolumeEnergyDynamics,
T_start=TChiWatSup_nominal,
nPorts=3) "Mixing volume representing building CHW primary";
Buildings.Fluid.Sensors.MassFlowRate senMasFloChiWat(
redeclare final package Medium = MediumBui,
final allowFlowReversal=allowFlowReversalBui)
"Chilled water mass flow rate";
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai2(final k=
m1HexChi_flow_nominal);
Buildings.Controls.OBC.Utilities.PIDWithEnable conTChiWat(
k=0.05,
Ti=120,
yMax=1,
controllerType=Buildings.Controls.OBC.CDL.Types.SimpleController.PI,
reverseActing=false,
yMin=0) "PI controller for district HX primary side";
Buildings.Controls.OBC.CDL.Reals.MultiSum PPumHeaTot(nin=2)
"Total pump power for heating applications";
Buildings.Fluid.Sources.Boundary_pT bouHeaWat(
redeclare final package Medium = MediumBui,
nPorts=1)
"Pressure boundary condition representing the expansion vessel";
Buildings.Fluid.Sources.Boundary_pT bouChiWat(
redeclare final package Medium = MediumBui,
nPorts=1)
"Pressure boundary condition representing the expansion vessel";
Buildings.Controls.OBC.CDL.Reals.MultiSum PPumCooTot(nin=1)
"Total pump power for space cooling";
Buildings.Controls.OBC.CDL.Reals.MultiSum PPumTot(nin=2)
"Total pump power";
Buildings.Fluid.Sensors.TemperatureTwoPort senTHeaWatSup(
redeclare final package Medium=MediumBui,
final allowFlowReversal=allowFlowReversalBui,
final m_flow_nominal=mHeaWat_flow_nominal)
"Heating water supply temperature";
Buildings.Fluid.Sensors.TemperatureTwoPort senTChiWatSup(
redeclare final package Medium=MediumBui,
final allowFlowReversal=allowFlowReversalBui,
final m_flow_nominal=mChiWat_flow_nominal)
"Chilled water supply temperature";
Buildings.DHC.ETS.Combined.Subsystems.SwitchBox
swiFlo(
redeclare final package Medium = MediumSer,
final m_flow_nominal=mSerWat_flow_nominal,
dpValve_nominal=1e-4) "Flow switch box";
Buildings.DHC.ETS.BaseClasses.Junction bypHeaWatSup(
redeclare final package Medium = MediumBui, final m_flow_nominal=proHeaWat.mCon_flow_nominal
*{1,-1,-1}) "Bypass heating water (supply)";
Buildings.DHC.ETS.BaseClasses.Junction bypHeaWatRet(
redeclare final package Medium = MediumBui, final m_flow_nominal=proHeaWat.mCon_flow_nominal
*{1,-1,1})
"Bypass heating water (return)";
Buildings.Controls.OBC.CDL.Logical.TrueFalseHold enaHea(
trueHoldDuration=15*60) "Enable heating";
Buildings.DHC.ETS.Combined.Subsystems.HeatPump proHeaWat(
redeclare final package Medium1 = MediumBui,
redeclare final package Medium2 = MediumSer,
dT_nominal=dT_nominal,
final have_varFloCon=have_varFloCon,
final COP_nominal=COPHeaWat_nominal,
final TCon_nominal=THeaWatSup_nominal,
final TEva_nominal=TDisWatMin - dT_nominal,
final Q1_flow_nominal=QHeaWat_flow_nominal,
final allowFlowReversal1=allowFlowReversalBui,
final allowFlowReversal2=allowFlowReversalSer,
final dp1_nominal=dp_nominal,
final dp2_nominal=dp_nominal) "Subsystem for heating water production";
Buildings.Controls.OBC.CDL.Reals.MultiSum masFloHeaTot(nin=2)
"Compute district water mass flow rate used for heating service";
Modelica.Blocks.Sources.Constant zer(final k=0) if not have_hotWat
"Replacement variable";
Buildings.Fluid.Sensors.TemperatureTwoPort senTHeaWatRet(
redeclare final package Medium = MediumBui,
final allowFlowReversal=allowFlowReversalBui,
final m_flow_nominal=mHeaWat_flow_nominal)
"Heating water return temperature";
Buildings.Fluid.Sensors.TemperatureTwoPort senTChiWatRet(
redeclare final package Medium = MediumBui,
final allowFlowReversal=allowFlowReversalBui,
final m_flow_nominal=mChiWat_flow_nominal)
"Chilled water return temperature";
Buildings.Fluid.Sensors.MassFlowRate senMasFloHeaWatPri(redeclare final
package Medium =
MediumBui, final allowFlowReversal=allowFlowReversalBui)
"Primary heating water mass flow rate";
Buildings.Controls.OBC.CDL.Logical.TrueFalseHold enaSHW(
trueHoldDuration=15*60) if have_hotWat "Enable SHW production";
Modelica.Blocks.Sources.Constant zer1(k=0) if not have_hotWat
"Replacement variable";
Buildings.Controls.OBC.CDL.Reals.Add masFloHea
"Service water mass flow rate for heating applications";
Buildings.Controls.OBC.CDL.Reals.MultiSum PHeaTot(nin=2)
"Total power used for heating and hot water production";
Buildings.Controls.OBC.CDL.Reals.Subtract dTHHW
"Heating hot water DeltaT";
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter capFloHHW(
final k=cpBui_default) if have_varFloEva or have_varFloCon "Capacity flow rate";
Buildings.DHC.ETS.Combined.Controls.PrimaryVariableFlow conFloConHHW(
final Q_flow_nominal=QHeaWat_flow_nominal,
final dT_nominal=dT_nominal,
final ratFloMin=ratFloMin,
final cp=cpBui_default) if have_varFloCon
"Mass flow rate control";
Buildings.Controls.OBC.CDL.Reals.Max priOve if have_varFloCon
"Ensure primary overflow";
Buildings.Controls.OBC.CDL.Reals.Multiply loaHHW
if have_varFloEva or have_varFloCon "Heating load";
Fluid.Sensors.MassFlowRate senMasFlo1HexChi(redeclare package Medium =
MediumSer) "Chilled water HX primary mass flow rate";
equation
connect(TChiWatSupSet, conTChiWat.u_s);
connect(pum1HexChi.P, PPumCooTot.u[1]);
connect(PPumHeaTot.y, PPumTot.u[1]);
connect(PPumCooTot.y, PPumTot.u[2]);
connect(pum1HexChi.m_flow_actual, mCoo_flow);
connect(volMix_a.ports[1], swiFlo.port_bSup);
connect(swiFlo.port_aRet, volMix_b.ports[1]);
connect(volMix_b.ports[2], pum1HexChi.port_a);
connect(hexChi.port_b1, volMix_a.ports[2]);
connect(gai2.y, pum1HexChi.m_flow_in);
connect(PPumTot.y, PPum);
connect(ports_aHeaWat[1], senMasFloHeaWat.port_a);
connect(bypHeaWatSup.port_2, senTHeaWatSup.port_a);
connect(senTHeaWatSup.port_b, ports_bHeaWat[1]);
connect(bypHeaWatRet.port_2, volHeaWatRet.ports[1]);
connect(bouHeaWat.ports[1], volHeaWatRet.ports[2]);
connect(ports_aChiWat[1], senMasFloChiWat.port_a);
connect(senTChiWatSup.port_b, ports_bChiWat[1]);
connect(bypHeaWatRet.port_3, bypHeaWatSup.port_3);
connect(volHeaWatRet.ports[3], proHeaWat.port_a1);
connect(proHeaWat.port_b2, volMix_b.ports[3]);
connect(volMix_a.ports[3], proHeaWat.port_a2);
connect(enaHea.y, proHeaWat.uEna);
connect(THeaWatSupSet, proHeaWat.TSupSet);
connect(proHeaWat.PPum, PPumHeaTot.u[1]);
connect(masFloHeaTot.y, mHea_flow);
connect(zer.y, masFloHeaTot.u[2]);
connect(proHeaWat.mEva_flow, masFloHeaTot.u[1]);
connect(zer.y, PPumHeaTot.u[2]);
connect(senMasFloHeaWat.port_b, senTHeaWatRet.port_a);
connect(senTHeaWatRet.port_b, bypHeaWatRet.port_1);
connect(senMasFloChiWat.port_b, senTChiWatRet.port_a);
connect(proHeaWat.port_b1, senMasFloHeaWatPri.port_a);
connect(senMasFloHeaWatPri.port_b, bypHeaWatSup.port_1);
connect(port_aSerAmb, swiFlo.port_aSup);
connect(swiFlo.port_bRet, port_bSerAmb);
connect(uHea, enaHea.u);
connect(conTChiWat.y, gai2.u);
connect(uCoo, conTChiWat.uEna);
connect(uSHW, enaSHW.u);
connect(senTChiWatRet.port_b, volChiWat.ports[1]);
connect(volChiWat.ports[2], hexChi.port_a2);
connect(hexChi.port_b2, senTChiWatSup.port_a);
connect(bouChiWat.ports[1], volChiWat.ports[3]);
connect(senTChiWatSup.T, conTChiWat.u_m);
connect(zer1.y, masFloHea.u2);
connect(proHeaWat.mEva_flow, masFloHea.u1);
connect(masFloHea.y, swiFlo.mPos_flow);
connect(proHeaWat.PHea, PHeaTot.u[1]);
connect(zer.y, PHeaTot.u[2]);
connect(PHeaTot.y, PHea);
connect(senTHeaWatRet.T, dTHHW.u2);
connect(senTHeaWatSup.T, dTHHW.u1);
connect(senMasFloHeaWat.m_flow, capFloHHW.u);
connect(senMasFloHeaWat.m_flow, priOve.u1);
connect(conFloConHHW.m_flow, priOve.u2);
connect(priOve.y, proHeaWat.m1_flow);
connect(capFloHHW.y, loaHHW.u2);
connect(dTHHW.y, loaHHW.u1);
connect(loaHHW.y, conFloConHHW.loa);
connect(pum1HexChi.port_b, senMasFlo1HexChi.port_a);
connect(senMasFlo1HexChi.port_b, hexChi.port_a1);
connect(senMasFlo1HexChi.m_flow, swiFlo.mRev_flow);
end PartialHeatPumpHeatExchanger;