Buildings.Examples.VAVCO2.BaseClasses

This package contains base classes that are used to construct the models in Buildings.Examples.VAVCO2.

Package Content

Name	Description
DamperControl	Local loop controller for damper
Occupancy	Model for occupancy
RoomLeakage	Room leakage model
RoomVAV	Model for CO2 emitted by people
Suite	Model of a suite consisting of five rooms of the MIT system model

Buildings.Examples.VAVCO2.BaseClasses.DamperControl

Information

Parameters

Connectors

Modelica definition

Type	Name	Default	Description
Real	CO2Set	700E-6	CO2 set point in volume fraction
Real	Kp	10	Proportional gain

Type	Name	Description
input RealInput	u	Connector of Real input signal
output RealOutput	y	Connector of Real output signal

block DamperControl "Local loop controller for damper" extends Modelica.Blocks.Interfaces.SISO; parameter Real CO2Set = 700E-6 "CO2 set point in volume fraction"; parameter Real Kp = 10 "Proportional gain"; protected Modelica.Blocks.Sources.Constant xSetNor(k=1) "CO2 set point (normalized)"; public Buildings.Controls.Continuous.LimPID con( yMin=0, y_start=0.5, Ti=1, controllerType=Modelica.Blocks.Types.SimpleController.P, k=Kp, limiter(u(start=0.75)), yMax=1, reverseAction=true, Td=60); protected Modelica.Blocks.Math.Gain gain1(k=1/CO2Set) "Gain. Division by CO2Set is to normalize the control error"; equation connect(con.y, y); connect(xSetNor.y, con.u_s); connect(gain1.y, con.u_m); connect(u, gain1.u); end DamperControl;

Buildings.Examples.VAVCO2.BaseClasses.Occupancy

Connectors

Modelica definition

Type	Name	Description
output RealOutput	y1[2]	Connector of Real output signals
output RealOutput	y2[2]	Connector of Real output signals
output RealOutput	y3[2]	Connector of Real output signals

model Occupancy "Model for occupancy" Modelica.Blocks.Sources.CombiTimeTable office1( extrapolation=Modelica.Blocks.Types.Extrapolation.Periodic, smoothness=Modelica.Blocks.Types.Smoothness.ConstantSegments, tableOnFile=false, table=[-6*3600,0.0; 8*3600,2; 9*3600,3; 12*3600, 2; 13*3600,6; 15*3600,3; 16*3600,4; 18*3600,0]) "Office with double occupancy"; Modelica.Blocks.Sources.CombiTimeTable office2( extrapolation=Modelica.Blocks.Types.Extrapolation.Periodic, smoothness=Modelica.Blocks.Types.Smoothness.ConstantSegments, tableOnFile=false, table=[-6*3600,0.0; 8*3600,2; 9*3600,3; 12*3600, 2; 13*3600,5; 15*3600,3; 16*3600,6; 18*3600,0]) "Office with double occupancy"; Modelica.Blocks.Sources.CombiTimeTable cla1( extrapolation=Modelica.Blocks.Types.Extrapolation.Periodic, smoothness=Modelica.Blocks.Types.Smoothness.ConstantSegments, tableOnFile=false, table=[-6*3600,0.0; 8*3600,25; 9*3600,20; 10*3600,30; 12*3600, 0; 13*3600,30; 15*3600,40; 16*3600,20; 18*3600,0]) "Class room"; Modelica.Blocks.Sources.CombiTimeTable cla2( extrapolation=Modelica.Blocks.Types.Extrapolation.Periodic, smoothness=Modelica.Blocks.Types.Smoothness.ConstantSegments, tableOnFile=false, table=[-6*3600,0.0; 8*3600,20; 9*3600,10; 10*3600,20; 11*3600,15; 12*3600, 0; 13*3600,30; 15*3600,20; 16*3600,25; 18*3600,0]) "Class room"; Modelica.Blocks.Sources.CombiTimeTable smaRoo1( extrapolation=Modelica.Blocks.Types.Extrapolation.Periodic, smoothness=Modelica.Blocks.Types.Smoothness.ConstantSegments, tableOnFile=false, table=[-6*3600,0.0; 8*3600,0.4; 9*3600,1; 12*3600,1; 13*3600,0.5; 14*3600,1.0; 16*3600,0.5; 18*3600,0]) "Small rooms"; Modelica.Blocks.Sources.CombiTimeTable smaRoo2( extrapolation=Modelica.Blocks.Types.Extrapolation.Periodic, smoothness=Modelica.Blocks.Types.Smoothness.ConstantSegments, tableOnFile=false, table=[-6*3600,0.0; 8*3600,0.4; 9*3600,1; 10*3600,0.4; 12*3600,1; 13*3600,0.3; 14*3600,0.4; 16*3600,0.2; 18*3600,0]) "Small rooms"; Modelica.Blocks.Interfaces.RealOutput y1[2] "Connector of Real output signals"; Modelica.Blocks.Interfaces.RealOutput y2[2] "Connector of Real output signals"; Modelica.Blocks.Interfaces.RealOutput y3[2] "Connector of Real output signals"; Modelica.Blocks.Math.Gain sca1(k=2) "Scaling for occupancy"; Modelica.Blocks.Math.Gain sca2(k=3) "Scaling for occupancy"; Modelica.Blocks.Math.Gain sca3(k=3) "Scaling for occupancy"; Modelica.Blocks.Math.Gain sca4(k=2) "Scaling for occupancy"; Modelica.Blocks.Math.Gain sca5(k=3) "Scaling for occupancy"; Modelica.Blocks.Math.Gain sca6(k=3) "Scaling for occupancy"; equation connect(cla1.y[1], sca1.u); connect(cla2.y[1], sca4.u); connect(office1.y[1], sca2.u); connect(office2.y[1], sca5.u); connect(smaRoo1.y[1], sca3.u); connect(smaRoo2.y[1], sca6.u); connect(sca1.y, y1[1]); connect(sca4.y, y1[2]); connect(sca2.y, y2[1]); connect(sca5.y, y2[2]); connect(sca3.y, y3[1]); connect(sca6.y, y3[2]); end Occupancy;

Buildings.Examples.VAVCO2.BaseClasses.RoomLeakage

Information

Parameters

Connectors

Modelica definition

Type	Name	Default	Description
replaceable package Medium	Modelica.Media.Interfaces.Pa...	Medium in the component

Type	Name	Description
replaceable package Medium	Medium in the component
input RealInput	p	Pressure
FluidPort_b	port_b

model RoomLeakage "Room leakage model" extends Buildings.BaseClasses.BaseIcon; replaceable package Medium = Modelica.Media.Interfaces.PartialMedium "Medium in the component"; Buildings.Fluid.FixedResistances.FixedResistanceDpM res( m_flow_nominal=1, redeclare package Medium = Medium, dp_nominal=1000) "Resistance model"; Modelica.Blocks.Interfaces.RealInput p "Pressure"; Modelica.Fluid.Interfaces.FluidPort_b port_b(redeclare package Medium = Medium); Buildings.Fluid.Sources.Boundary_pT amb( redeclare package Medium = Medium, nPorts=1, use_p_in=true, p=101325, T=293.15); equation connect(res.port_b, port_b); connect(p, amb.p_in); connect(amb.ports[1], res.port_a); end RoomLeakage;

Buildings.Examples.VAVCO2.BaseClasses.RoomVAV

Parameters

Connectors

Modelica definition

Type	Name	Default	Description
replaceable package Medium	Modelica.Media.Interfaces.Pa...	Medium in the component
replaceable model MotorModel	Buildings.Fluid.Actuators.Mo...
Volume	VRoo		Volume of room [m3]
Volume	VPle		Volume of plenum [m3]
Area	ADam		Damper face area [m2]
MassFlowRate	m_flow_nominal		Nominal mass flow rate [kg/s]

Type	Name	Description
replaceable package Medium	Medium in the component
replaceable model MotorModel
FluidPort_a	portRoo1	Fluid port
FluidPort_a	portSup	Fluid port
FluidPort_a	portRet	Fluid port
FluidPort_a	portRoo2	Fluid port
output RealOutput	yDam	Damper control signal
input RealInput	nPeo	Number of people

model RoomVAV "Model for CO2 emitted by people" replaceable package Medium = Modelica.Media.Interfaces.PartialMedium "Medium in the component"; replaceable model MotorModel = Buildings.Fluid.Actuators.Motors.IdealMotor(delta=0.02, tOpe=60); Fluid.Actuators.Dampers.VAVBoxExponential vav( redeclare package Medium = Medium, A=ADam, m_flow_nominal=m_flow_nominal, dp_nominal=1E2, allowFlowReversal=false, from_dp=false); Buildings.Fluid.MixingVolumes.MixingVolume vol( redeclare package Medium = Medium, V=VRoo, nPorts=6, m_flow_nominal=m_flow_nominal, energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial) "Room volume"; Buildings.Fluid.Sensors.TraceSubstances senCO2( redeclare package Medium = Medium) "Sensor at volume"; Buildings.Fluid.Sources.TraceSubstancesFlowSource sou(redeclare package Medium = Medium, use_m_flow_in=true, nPorts=1) "CO2 source"; parameter Modelica.SIunits.Volume VRoo "Volume of room"; Buildings.Fluid.MixingVolumes.MixingVolume ple( redeclare package Medium = Medium, V=VPle, nPorts=2, m_flow_nominal=m_flow_nominal, energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial) "Plenum volume"; parameter Modelica.SIunits.Volume VPle "Volume of plenum"; Modelica.Fluid.Interfaces.FluidPort_a portRoo1(redeclare package Medium = Medium) "Fluid port"; Modelica.Fluid.Interfaces.FluidPort_a portSup(redeclare package Medium = Medium) "Fluid port"; Modelica.Fluid.Interfaces.FluidPort_a portRet(redeclare package Medium = Medium) "Fluid port"; Modelica.Fluid.Interfaces.FluidPort_a portRoo2(redeclare package Medium = Medium) "Fluid port"; Modelica.Blocks.Interfaces.RealOutput yDam "Damper control signal"; parameter Modelica.SIunits.Area ADam "Damper face area"; parameter Modelica.SIunits.MassFlowRate m_flow_nominal "Nominal mass flow rate"; Modelica.Blocks.Interfaces.RealInput nPeo "Number of people"; Modelica.Blocks.Math.Gain gaiCO2(k=8.18E-6) "CO2 emission per person"; Fluid.Sensors.Conversions.To_VolumeFraction volFraCO2( MMMea=Modelica.Media. IdealGases.Common.SingleGasesData.CO2.MM) "CO2 volume fraction"; DamperControl con(Kp=1) "Damper controller"; Modelica.Blocks.Math.Gain peoDen(k=2.5/VRoo) "People density per m2"; //res(dp_nominal=5, m_flow_nominal=1.2/3600)) Modelica.Blocks.Sources.RealExpression vavACH(y=vav.m_flow*3600/VRoo/1.2) "VAV box air change per hour"; Fluid.FixedResistances.FixedResistanceDpM dpPle( redeclare package Medium = Medium, m_flow_nominal=m_flow_nominal, dp_nominal=20, from_dp=true, allowFlowReversal=false); equation connect(gaiCO2.y, sou.m_flow_in); connect(senCO2.C, volFraCO2.m); connect(volFraCO2.V, con.u); connect(con.y, yDam); connect(con.y, vav.y); connect(ple.ports[1], portRet); connect(nPeo, gaiCO2.u); connect(nPeo, peoDen.u); connect(portSup, vav.port_a); connect(portRoo1, vol.ports[1]); connect(vav.port_b, vol.ports[2]); connect(senCO2.port, vol.ports[3]); connect(portRoo2, vol.ports[4]); connect(sou.ports[1], vol.ports[5]); connect(dpPle.port_a, vol.ports[6]); connect(dpPle.port_b, ple.ports[2]); end RoomVAV;

Buildings.Examples.VAVCO2.BaseClasses.Suite

Information

Parameters

Connectors

Modelica definition

Type	Name	Default	Description
replaceable package Medium	Modelica.Media.Interfaces.Pa...	Medium in the component
Real	scaM_flow		Scaling factor for mass flow rate
MassFlowRate	m0Tot_flow	scaM_flow*(5.196 + 2.8428 + ...	[kg/s]

Type	Name	Description
replaceable package Medium	Medium in the component
input RealInput	p	Pressure
FluidPort_b	port_aSup
FluidPort_b	port_bExh
output RealOutput	p_rel	Relative pressure signal
output RealOutput	yDam[6]	VAV damper positions
output RealOutput	dPRoo	Room pressurization

model Suite "Model of a suite consisting of five rooms of the MIT system model" replaceable package Medium = Modelica.Media.Interfaces.PartialMedium "Medium in the component"; Modelica.Blocks.Interfaces.RealInput p "Pressure"; Modelica.Fluid.Interfaces.FluidPort_b port_aSup(redeclare package Medium = Medium); parameter Real scaM_flow "Scaling factor for mass flow rate"; parameter Modelica.SIunits.MassFlowRate m0Tot_flow= scaM_flow*(5.196+2.8428+1.0044+0.9612+0.3624+0.1584); Buildings.Fluid.FixedResistances.SplitterFixedResistanceDpM spl34( redeclare package Medium = Medium, m_flow_nominal=scaM_flow*{1,-1,-1}, dp_nominal={0.176,-0.844,-0.0662}); Buildings.Fluid.FixedResistances.SplitterFixedResistanceDpM mix55( redeclare package Medium = Medium, m_flow_nominal=scaM_flow*{-1,1,1}, dp_nominal=1E3*{-0.263200E-02,0.999990E-03,0.649000E-03}); Buildings.Fluid.FixedResistances.FixedResistanceDpM res13( m_flow_nominal=scaM_flow*1, dp_nominal=0.1E3, redeclare package Medium = Medium); Buildings.Fluid.FixedResistances.FixedResistanceDpM res14( m_flow_nominal=scaM_flow*1, dp_nominal=0.1E3, redeclare package Medium = Medium); Buildings.Fluid.FixedResistances.FixedResistanceDpM res15( m_flow_nominal=scaM_flow*1, dp_nominal=0.1E3, redeclare package Medium = Medium); Buildings.Fluid.FixedResistances.FixedResistanceDpM res16( m_flow_nominal=scaM_flow*1, dp_nominal=0.1E3, redeclare package Medium = Medium); Buildings.Fluid.FixedResistances.FixedResistanceDpM res17( m_flow_nominal=scaM_flow*1, dp_nominal=0.1E3, redeclare package Medium = Medium); Buildings.Fluid.FixedResistances.SplitterFixedResistanceDpM spl35( redeclare package Medium = Medium, m_flow_nominal=scaM_flow*{1,-1,-1}, dp_nominal=1E3*{0.371000E-04,-0.259000E-02,-0.131000E-02}); Buildings.Fluid.FixedResistances.SplitterFixedResistanceDpM spl36( redeclare package Medium = Medium, m_flow_nominal=scaM_flow*{1,-1,-1}, dp_nominal=1E3*{0.211000E-03,-0.128000E-01,-0.223000E-02}); Buildings.Fluid.FixedResistances.SplitterFixedResistanceDpM spl37( redeclare package Medium = Medium, m_flow_nominal=scaM_flow*{1,-1,-1}, dp_nominal=1E3*{0.730000E-03,-0.128000E-01,-0.938000E-02}); Buildings.Fluid.FixedResistances.SplitterFixedResistanceDpM spl38( redeclare package Medium = Medium, m_flow_nominal=scaM_flow*{1,-1,-1}, dp_nominal=1E3*{0.731000E-02,-0.895000E-01,-0.942000E-01}); Buildings.Fluid.FixedResistances.SplitterFixedResistanceDpM mix54( redeclare package Medium = Medium, m_flow_nominal=scaM_flow*{-1,1,1}, dp_nominal=1E3*{-0.653000E-02,0.271000E-03,0.402000E-04}); Buildings.Fluid.FixedResistances.SplitterFixedResistanceDpM mix53( redeclare package Medium = Medium, m_flow_nominal=scaM_flow*{-1,1,1}, dp_nominal=1E3*{-0.566000E-01,0.541000E-02,0.749000E-04}); Buildings.Fluid.FixedResistances.SplitterFixedResistanceDpM mix52( redeclare package Medium = Medium, m_flow_nominal=scaM_flow*{-1,1,1}, dp_nominal=1E3*{-0.353960,0.494000E-03,0.922000E-03}); Buildings.Fluid.FixedResistances.SplitterFixedResistanceDpM mix51( redeclare package Medium = Medium, m_flow_nominal=scaM_flow*{-1,1,1}, dp_nominal=1E3*{-0.847600E-01,1.89750,0.150000E-02}); Modelica.Fluid.Interfaces.FluidPort_b port_bExh(redeclare package Medium = Medium); Buildings.Fluid.FixedResistances.FixedResistanceDpM res1( m_flow_nominal=scaM_flow*1, dp_nominal=0.1E3, redeclare package Medium = Medium); RoomVAV roo45( redeclare package Medium = Medium, ADam=scaM_flow*0.49, m_flow_nominal=scaM_flow*5.196, VRoo=1820, VPle=396) "Room model"; RoomVAV roo46( redeclare package Medium = Medium, ADam=scaM_flow*0.245, m_flow_nominal=scaM_flow*2.8428, VRoo=1210, VPle=330) "Room model"; RoomVAV roo47( redeclare package Medium = Medium, ADam=scaM_flow*0.128, m_flow_nominal=scaM_flow*1.0044, VRoo=647, VPle=125) "Room model"; RoomVAV roo48( redeclare package Medium = Medium, ADam=scaM_flow*0.128, m_flow_nominal=scaM_flow*0.9612, VRoo=385, VPle=107) "Room model"; RoomVAV roo49( redeclare package Medium = Medium, ADam=scaM_flow*0.0494, m_flow_nominal=scaM_flow*0.3624, VRoo=48, VPle=13) "Room model"; RoomVAV roo50( redeclare package Medium = Medium, ADam=scaM_flow*0.024, m_flow_nominal=scaM_flow*0.1584, VRoo=155, VPle=43) "Room model"; Occupancy occ "Occupancy"; Buildings.Fluid.Sensors.RelativePressure dpMea( redeclare package Medium = Medium) "Static pressure measurement"; Modelica.Blocks.Interfaces.RealOutput p_rel "Relative pressure signal"; Modelica.Blocks.Interfaces.RealOutput yDam[6] "VAV damper positions"; Buildings.Fluid.Sensors.Pressure pRoo(redeclare package Medium = Medium) "Room pressure"; Modelica.Blocks.Math.Feedback feeBac; Modelica.Blocks.Interfaces.RealOutput dPRoo "Room pressurization"; equation connect(spl38.port_2, roo50.portSup); connect(port_aSup, spl34.port_1); connect(spl34.port_2, spl35.port_1); connect(spl35.port_2, spl36.port_1); connect(spl36.port_2, spl37.port_1); connect(spl37.port_2, spl38.port_1); connect(dpMea.port_a, spl38.port_1); connect(pRoo.p, feeBac.u2); connect(roo50.portRoo2, pRoo.port); connect(spl34.port_3, roo45.portSup); connect(spl35.port_3, roo46.portSup); connect(spl36.port_3, roo47.portSup); connect(spl37.port_3, roo48.portSup); connect(spl38.port_3, roo49.portSup); connect(dpMea.port_b, res16.port_b); connect(p, feeBac.u1); connect(dPRoo, feeBac.y); connect(dpMea.p_rel, p_rel); connect(roo45.yDam, yDam[1]); connect(roo46.yDam, yDam[2]); connect(roo47.yDam, yDam[3]); connect(roo48.yDam, yDam[4]); connect(roo49.yDam, yDam[5]); connect(roo50.yDam, yDam[6]); connect(occ.y1[1], roo45.nPeo); connect(occ.y1[2], roo46.nPeo); connect(occ.y2[1], roo47.nPeo); connect(occ.y2[2], roo48.nPeo); connect(occ.y3[1], roo49.nPeo); connect(occ.y3[2], roo50.nPeo); connect(port_bExh, mix55.port_1); connect(mix55.port_2, mix54.port_1); connect(mix54.port_2, mix53.port_1); connect(mix53.port_2, mix52.port_1); connect(mix52.port_2, mix51.port_1); connect(mix51.port_2, roo50.portRet); connect(roo48.portRet, mix51.port_3); connect(mix52.port_3, roo49.portRet); connect(roo47.portRet, mix53.port_3); connect(roo46.portRet, mix54.port_3); connect(roo45.portRet, mix55.port_3); connect(res1.port_b, roo45.portRoo1); connect(roo45.portRoo2, res13.port_a); connect(res13.port_b, roo46.portRoo1); connect(roo46.portRoo2, res14.port_a); connect(res14.port_b, roo47.portRoo1); connect(roo47.portRoo2, res15.port_a); connect(res15.port_b, roo48.portRoo1); connect(roo48.portRoo2, res16.port_a); connect(res16.port_b, roo49.portRoo1); connect(roo49.portRoo2, res17.port_a); connect(res17.port_b, roo50.portRoo1); connect(roo50.portRoo2, res1.port_a); end Suite;