Buildings.ThermalZones.Detailed.Validation.BaseClasses
Package with base classes for Buildings.ThermalZones.Detailed.Validation
Information
This package contains base classes that are used to construct the models in Buildings.ThermalZones.Detailed.Validation.
Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).
Package Content
| Name | Description |
|---|---|
 SingleZoneFloor
|
Model of a building floor as a single zone |
 SingleZoneFloorHeater
|
A model with an ideal heater, a fan, a PI controller and an integrator |
Buildings.ThermalZones.Detailed.Validation.BaseClasses.SingleZoneFloor
Model of a building floor as a single zone
Information
This model assumes a mid-floor of a building as a single zone with a homogeneous temperature; i.e., the air in the whole floor is assumed to be fully mixed.
The geometry, materials and constructions of the model are consistent with those of Buildings.Examples.VAVReheat.BaseClasses.Floor, which models the same mid-floor as five zones: a core zone and four perimeter zones.
The internal partition walls in the five-zone floor model are considered as thermal mass in this single-zone floor model. The doors in the five-zone floor model have been removed in the single-zone floor model.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | Modelica.Media.Interfaces.Pa... | Medium model for air | |
| Volume | VRoo | 4555.7 | Room volum [m3] |
| Height | hRoo | 2.74 | Room height [m] |
| Length | hWin | 1.5 | Height of windows [m] |
| Real | winWalRat | 0.33 | Window to wall ratio for exterior walls |
| Plywood | matWoo | matWoo(x=0.01, k=0.11, d=544... | Wood for exterior construction |
| Concrete | matCon | matCon(x=0.1, k=1.311, c=836... | Concrete |
| Generic | matIns | matIns(x=0.087, k=0.049, c=8... | Steelframe construction with insulation |
| GypsumBoard | matGyp | matGyp(x=0.0127, k=0.16, c=8... | Gypsum board |
| GypsumBoard | matGyp2 | matGyp2(x=0.025, k=0.16, c=8... | Gypsum board |
| Plywood | matFur | matFur(x=0.15) | Material for furniture |
| Carpet | matCar | Carpet | |
| DoubleClearAir13Clear | glaSys | glaSys(UFra=2, shade=Buildin... | Data record for the glazing system |
| Generic | conExtWal | conExtWal(final nLay=3, mate... | Exterior construction |
| Generic | conIntWal | conIntWal(final nLay=1, mate... | Interior wall construction |
| Generic | conFlo | conFlo(final nLay=1, materia... | Floor construction (opa_a is carpet) |
| Generic | conFur | conFur(final nLay=1, materia... | Construction for internal mass of furniture |
| Boolean | use_windPressure | true | Set to true to enable wind pressure |
Connectors
| Type | Name | Description |
|---|---|---|
| replaceable package Medium | Medium model for air | |
| VesselFluidPorts_b | ports[2] | Fluid inlets and outlets |
| output RealOutput | TRooAir | Room air temperature [K] |
| output RealOutput | p_rel | Relative pressure signal of building static pressure |
| Bus | weaBus | Weather data bus |
Modelica definition
model SingleZoneFloor "Model of a building floor as a single zone"
replaceable package Medium = Modelica.Media.Interfaces.PartialMedium
"Medium model for air";
parameter Modelica.Units.SI.Volume VRoo=4555.7 "Room volum";
parameter Modelica.Units.SI.Height hRoo=2.74 "Room height";
parameter Modelica.Units.SI.Length hWin=1.5 "Height of windows";
parameter Real winWalRat(min=0.01,max=0.99) = 0.33
"Window to wall ratio for exterior walls";
parameter Buildings.HeatTransfer.Data.Solids.Plywood matWoo(
x=0.01,
k=0.11,
d=544,
nStaRef=1) "Wood for exterior construction";
parameter Buildings.HeatTransfer.Data.Solids.Concrete matCon(
x=0.1,
k=1.311,
c=836,
nStaRef=5) "Concrete";
parameter Buildings.HeatTransfer.Data.Solids.Generic matIns(
x=0.087,
k=0.049,
c=836.8,
d=265,
nStaRef=5) "Steelframe construction with insulation";
parameter Buildings.HeatTransfer.Data.Solids.GypsumBoard matGyp(
x=0.0127,
k=0.16,
c=830,
d=784,
nStaRef=2) "Gypsum board";
parameter Buildings.HeatTransfer.Data.Solids.GypsumBoard matGyp2(
x=0.025,
k=0.16,
c=830,
d=784,
nStaRef=2) "Gypsum board";
parameter Buildings.HeatTransfer.Data.Solids.Plywood matFur(x=0.15)
"Material for furniture";
parameter Buildings.HeatTransfer.Data.Resistances.Carpet matCar "Carpet";
parameter Buildings.HeatTransfer.Data.GlazingSystems.DoubleClearAir13Clear glaSys(
UFra=2,
shade=Buildings.HeatTransfer.Data.Shades.Gray(),
haveInteriorShade=false,
haveExteriorShade=false) "Data record for the glazing system";
parameter Buildings.HeatTransfer.Data.OpaqueConstructions.Generic conExtWal(
final nLay=3,
material={matWoo,matIns,matGyp}) "Exterior construction";
parameter Buildings.HeatTransfer.Data.OpaqueConstructions.Generic conIntWal(
final nLay=1,
material={matGyp2}) "Interior wall construction";
parameter Buildings.HeatTransfer.Data.OpaqueConstructions.Generic conFlo(
final nLay=1,
material={matCon}) "Floor construction (opa_a is carpet)";
parameter Buildings.HeatTransfer.Data.OpaqueConstructions.Generic conFur(
final nLay=1,
material={matFur}) "Construction for internal mass of furniture";
parameter Boolean use_windPressure=true
"Set to true to enable wind pressure";
Modelica.Fluid.Vessels.BaseClasses.VesselFluidPorts_b ports[2](
redeclare package Medium = Medium) "Fluid inlets and outlets";
Modelica.Blocks.Interfaces.RealOutput TRooAir(
unit="K",
displayUnit="degC") "Room air temperature";
Modelica.Blocks.Interfaces.RealOutput p_rel
"Relative pressure signal of building static pressure";
Buildings.ThermalZones.Detailed.MixedAir flo(
redeclare package Medium = Medium,
AFlo=AFlo,
hRoo=hRoo,
nConExt=0,
nConExtWin=4,
datConExtWin(
layers={conExtWal,conExtWal,conExtWal,conExtWal},
A={49.91*hRoo,49.91*hRoo,33.27*hRoo,33.27*hRoo},
glaSys={glaSys,glaSys,glaSys,glaSys},
wWin={winWalRat/hWin*49.91*hRoo,winWalRat/hWin*49.91*hRoo,winWalRat/hWin*33.27
*hRoo,winWalRat/hWin*33.27*hRoo},
each hWin=hWin,
fFra={0.1,0.1,0.1,0.1},
til={Z_,Z_,Z_,Z_},
azi={N_,S_,W_,E_}),
nConPar=3,
datConPar(
layers={conFlo,conFur,conIntWal},
A={AFlo,AFlo*2,(6.47*2 + 40.76 + 24.13)*2*hRoo},
til={F_,Z_,Z_}),
nConBou=0,
nSurBou=0,
nPorts=7,
intConMod=Buildings.HeatTransfer.Types.InteriorConvection.Temperature,
energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial) "Floor";
Modelica.Thermal.HeatTransfer.Sensors.TemperatureSensor temAir
"Air temperature sensor";
Buildings.Fluid.Sensors.RelativePressure senRelPre(
redeclare package Medium = Medium)
"Building pressure measurement";
Buildings.Fluid.Sources.Outside out(
nPorts=1, redeclare package Medium = Medium) "Outdoor air";
Buildings.BoundaryConditions.WeatherData.Bus weaBus "Weather data bus";
Buildings.Examples.VAVReheat.BaseClasses.RoomLeakage leaSou(
redeclare package Medium = Medium,
VRoo=568.77,
s=49.91/33.27,
azi=S_,
final use_windPressure=use_windPressure)
"Model for air infiltration through the envelope";
Buildings.Examples.VAVReheat.BaseClasses.RoomLeakage leaEas(
redeclare package Medium = Medium,
VRoo=360.0785,
s=33.27/49.91,
azi=E_,
final use_windPressure=use_windPressure)
"Model for air infiltration through the envelope";
Buildings.Examples.VAVReheat.BaseClasses.RoomLeakage leaNor(
redeclare package Medium = Medium,
VRoo=568.77,
s=49.91/33.27,
azi=N_,
final use_windPressure=use_windPressure)
"Model for air infiltration through the envelope";
Buildings.Examples.VAVReheat.BaseClasses.RoomLeakage leaWes(
redeclare package Medium = Medium,
VRoo=360.0785,
s=33.27/49.91,
azi=W_,
final use_windPressure=use_windPressure)
"Model for air infiltration through the envelope";
Modelica.Blocks.Sources.CombiTimeTable intGaiFra(
table=[0,0.05; 8,0.05; 9,0.9; 12,0.9; 12,0.8; 13,0.8; 13,1; 17,1; 19,0.1;
24,0.05],
timeScale=3600,
extrapolation=Modelica.Blocks.Types.Extrapolation.Periodic)
"Fraction of internal heat gain";
Modelica.Blocks.Math.MatrixGain gai(K=10*[0.4; 0.4; 0.2])
"Matrix gain to split up heat gain in radiant, convective and latent gain";
Modelica.Blocks.Sources.Constant uSha(k=0)
"Control signal for the shading device";
Modelica.Blocks.Routing.Replicator replicator(nout=1)
"Shading signals for all windows";
protected
parameter Modelica.Units.SI.Angle S_=Buildings.Types.Azimuth.S
"Azimuth for south walls";
parameter Modelica.Units.SI.Angle E_=Buildings.Types.Azimuth.E
"Azimuth for east walls";
parameter Modelica.Units.SI.Angle W_=Buildings.Types.Azimuth.W
"Azimuth for west walls";
parameter Modelica.Units.SI.Angle N_=Buildings.Types.Azimuth.N
"Azimuth for north walls";
parameter Modelica.Units.SI.Angle F_=Buildings.Types.Tilt.Floor
"Tilt for floor";
parameter Modelica.Units.SI.Angle Z_=Buildings.Types.Tilt.Wall
"Tilt for wall";
parameter Modelica.Units.SI.Area AFlo=VRoo/hRoo "Floor area";
equation
connect(flo.weaBus, weaBus);
connect(flo.heaPorAir, temAir.port);
connect(out.weaBus, weaBus);
connect(out.ports[1], senRelPre.port_b);
connect(temAir.T, TRooAir);
connect(weaBus, leaSou.weaBus);
connect(weaBus, leaEas.weaBus);
connect(leaNor.weaBus, weaBus);
connect(leaSou.port_b, flo.ports[1]);
connect(leaEas.port_b, flo.ports[2]);
connect(leaNor.port_b, flo.ports[3]);
connect(leaWes.port_b, flo.ports[4]);
connect(senRelPre.port_a, flo.ports[5]);
connect(weaBus, leaWes.weaBus);
connect(senRelPre.p_rel, p_rel);
connect(intGaiFra.y, gai.u);
connect(gai.y, flo.qGai_flow);
connect(uSha.y, replicator.u);
connect(replicator.y, flo.uSha);
connect(ports[1], flo.ports[6]);
connect(ports[2], flo.ports[7]);
end SingleZoneFloor;
Buildings.ThermalZones.Detailed.Validation.BaseClasses.SingleZoneFloorHeater
A model with an ideal heater, a fan, a PI controller and an integrator
Information
This model includes an ideal heater, a fan, a PI controller and an integrator for the heating energy. It is used in the validation model Buildings.ThermalZones.Detailed.Validation.SingleZoneFloorWithHeating.
Extends from Buildings.Fluid.Interfaces.PartialTwoPortInterface (Partial model transporting fluid between two ports without storing mass or energy).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| replaceable package Medium | PartialMedium | Medium in the component | |
| Volume | VRoo | Room air volume [m3] | |
| Nominal condition | |||
| MassFlowRate | m_flow_nominal | Nominal mass flow rate [kg/s] | |
| Assumptions | |||
| Boolean | allowFlowReversal | true | = false to simplify equations, assuming, but not enforcing, no flow reversal |
| Advanced | |||
| MassFlowRate | m_flow_small | 1E-4*abs(m_flow_nominal) | Small mass flow rate for regularization of zero flow [kg/s] |
| Diagnostics | |||
| Boolean | show_T | false | = true, if actual temperature at port is computed |
Connectors
| Type | Name | Description |
|---|---|---|
| FluidPort_a | port_a | Fluid connector a (positive design flow direction is from port_a to port_b) |
| FluidPort_b | port_b | Fluid connector b (positive design flow direction is from port_a to port_b) |
| replaceable package Medium | Medium model for air | |
| input RealInput | TSetRoo | Room setpoint temperature [K] |
| output RealOutput | yEHea | Heating energy [J] |
| input RealInput | TRooMea | Measured room temperature [K] |
Modelica definition
model SingleZoneFloorHeater
"A model with an ideal heater, a fan, a PI controller and an integrator"
extends Buildings.Fluid.Interfaces.PartialTwoPortInterface;
replaceable package Medium = Modelica.Media.Interfaces.PartialMedium
"Medium model for air";
parameter Modelica.Units.SI.Volume VRoo "Room air volume";
parameter Modelica.Units.SI.MassFlowRate m_flow_nominal
"Nominal mass flowrate";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TSetRoo(
unit="K",
displayUnit="degC")
"Room setpoint temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yEHea(
unit="J")
"Heating energy";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TRooMea(
unit="K",
displayUnit="degC")
"Measured room temperature";
Buildings.Controls.OBC.CDL.Continuous.PID conPID(
controllerType=Buildings.Controls.OBC.CDL.Types.SimpleController.PI,
Ti=900,
u_s(unit="K", displayUnit="degC"),
u_m(unit="K", displayUnit="degC")) "Controller for heater";
Buildings.Controls.OBC.CDL.Continuous.MultiplyByParameter gai(
k=20)
"Gain factor";
Buildings.Controls.OBC.CDL.Continuous.AddParameter addPar(
p=273.15 + 10,
y(unit="K", displayUnit="degC"))
"Compute the leaving water setpoint temperature";
Fluid.HeatExchangers.Heater_T hea(
redeclare final package Medium = Medium,
m_flow_nominal=m_flow_nominal,
dp_nominal=200,
show_T=true) "Ideal heater";
Fluid.Movers.FlowControlled_m_flow fan(
redeclare package Medium = Medium,
energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState,
m_flow_nominal=m_flow_nominal,
inputType=Buildings.Fluid.Types.InputType.Constant,
nominalValuesDefineDefaultPressureCurve=true) "Fan";
Modelica.Blocks.Continuous.Integrator EHea "Heating energy";
equation
connect(hea.Q_flow, EHea.u);
connect(addPar.y, hea.TSet);
connect(fan.port_b, hea.port_a);
connect(TRooMea, conPID.u_m);
connect(TSetRoo, conPID.u_s);
connect(EHea.y, yEHea);
connect(port_a, fan.port_a);
connect(hea.port_b, port_b);
connect(conPID.y, gai.u);
connect(gai.y, addPar.u);
end SingleZoneFloorHeater;