Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin
Sequences for dual duct terminal unit with cold duct minimum control
Information
This package contains sequences for dual duct terminal unit with cold-duct minimum control. They are created according to Section 5.14 of ASHRAE Guideline 36, May 2020. Note that the sequence uses two airflow sensors, one at each inlet.
Package Content
| Name | Description |
|---|---|
 Controller
|
Controller for dual-duct terminal unit with cold-duct minimum control |
 Subsequences
|
Package of subsequences for dual-duct terminal unit with cold-duct minimum control |
 Validation
|
Collection of validation models |
Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Controller
Controller for dual-duct terminal unit with cold-duct minimum control
Information
Controller for dual-duct terminal unit with cold-duct minimum control
according to Section 5.14 of ASHRAE
Guideline 36, May 2020. It outputs discharge airflow setpoint VSet_flow,
cold and hot duct dampers position setpoint (yCooDam, yHeaDam),
cooling supply temperature setpoint reset request yZonCooTemResReq,
heating supply temperature setpoint reset request yZonHeaTemResReq,
cold-duct static pressure setpoint reset request yColDucPreResReq,
hot-duct static pressure setpoint reset request yHotDucPreResReq,
heating fan request yHeaFanReq.
It also outputs the alarms about the low airflow yLowFloAla,
leaking dampers, and airflow sensor(s) calibration alarm.
The sequence consists of six subsequences.
a. Heating and cooling control loop
The subsequence is implementd according to Section 5.3.4. The measured zone
temperature TZon, zone setpoints temperatures THeaSet and
TCooSet are inputs to the instance of class
Buildings.Controls.OBC.ASHRAE.G36.ThermalZones.ZoneStates to generate the
heating and cooling control loop signal.
b. Active airflow setpoint calculation
This sequence sets the active maximum airflow according to
Section 5.14.4. Depending on operation modes uOpeMod, it sets the
airflow rate limits for cooling and heating supply.
See
Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Subsequences.ActiveAirFlow.
c. Dampers control
This sequence sets the dampers position setpoints.
The implementation is according to Section 5.14.5. The sequence outputs
discharge airflow rate setpoint VSet_flow, cold and hot ducts damper
position setpoints (yCooDam, yHeaDam). See
Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Subsequences.Dampers.
d. System reset requests generation
According to Section 5.14.8, this sequence outputs the system reset requests, i.e.
cooling and heating supply air temperature reset requests (yZonCooTemResReq and
yZonHeaTemResReq),
cold and hot duct static pressure reset requests (yColDucPreResReq and
yHotDucPreResReq), and the heating fan requests
yHeaFanReq.
See
Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Subsequences.SystemRequests.
e. Alarms
According to Section 5.14.6, this sequence outputs the alarms of low discharge flow, leaking dampers and airflow sensor calibration alarm. See Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Subsequences.Alarms.
f. Testing and commissioning overrides
According to Section 5.14.7, this sequence allows the override the aiflow and dampers position setpoints. See Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Subsequences.Overrides.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| VentilationStandard | venStd | Ventilation standard, ASHRAE 62.1 or Title 24 | |
| Boolean | have_winSen | true | True: the zone has window sensor |
| Boolean | have_occSen | true | True: the zone has occupancy sensor |
| Boolean | have_CO2Sen | true | True: the zone has CO2 sensor |
| Boolean | permit_occStandby | true | True: occupied-standby mode is permitted |
| Real | VOccMin_flow | Zone minimum outdoor airflow for occupants [m3/s] | |
| Real | VAreMin_flow | Zone minimum outdoor airflow for building area [m3/s] | |
| Design conditions | |||
| Real | VAreBreZon_flow | Design area component of the breathing zone outdoor airflow [m3/s] | |
| Real | VPopBreZon_flow | Design population component of the breathing zone outdoor airflow [m3/s] | |
| Real | VMin_flow | Design zone minimum airflow setpoint [m3/s] | |
| Real | VCooMax_flow | Design zone cooling maximum airflow rate [m3/s] | |
| Real | VHeaMax_flow | Design zone heating maximum airflow rate [m3/s] | |
| Control loops | |||
| Cooling | |||
| Real | kCooCon | 0.1 | Gain of controller for cooling control loop |
| Real | TiCooCon | 900 | Time constant of integrator block for cooling control loop [s] |
| Heating | |||
| Real | kHeaCon | 0.1 | Gain of controller for heating control loop |
| Real | TiHeaCon | 900 | Time constant of integrator block for heating control loop [s] |
| Dampers | |||
| SimpleController | controllerTypeDam | Buildings.Controls.OBC.CDL.T... | Type of controller |
| Real | kDam | 0.5 | Gain of controller for damper control |
| Real | TiDam | 300 | Time constant of integrator block for damper control [s] |
| Real | TdDam | 0.1 | Time constant of derivative block for damper control [s] |
| System requests | |||
| Real | thrTemDif | 3 | Threshold difference between zone temperature and cooling setpoint for generating 3 cooling SAT reset requests [K] |
| Real | twoTemDif | 2 | Threshold difference between zone temperature and cooling setpoint for generating 2 cooling SAT reset requests [K] |
| Duration time | |||
| Real | durTimTem | 120 | Duration time of zone temperature exceeds setpoint [s] |
| Real | durTimFlo | 60 | Duration time of airflow rate less than setpoint [s] |
| Alarms | |||
| Real | staPreMul | 1 | Importance multiplier for the zone static pressure reset control loop |
| Real | lowFloTim | 300 | Threshold time to check low flow rate [s] |
| Real | fanOffTim | 600 | Threshold time to check fan off [s] |
| Real | leaFloTim | 600 | Threshold time to check damper leaking airflow [s] |
| Time-based suppresion | |||
| Real | chaRat | 540 | Gain factor to calculate suppression time based on the change of the setpoint, seconds per Kelvin [s/K] |
| Real | maxSupTim | 1800 | Maximum suppression time [s] |
| Advanced | |||
| Real | dTHys | 0.25 | Near zero temperature difference, below which the difference will be seen as zero [K] |
| Real | looHys | 0.01 | Loop output hysteresis below which the output will be seen as zero [1] |
| Real | floHys | 0.01*VMin_flow | Near zero flow rate, below which the flow rate or difference will be seen as zero [m3/s] |
| Real | damPosHys | 0.005 | Near zero damper position, below which the damper will be seen as closed [1] |
| Real | staTim | 1800 | Delay triggering alarms after enabling AHU supply fan [s] |
| Real | iniDam | 0.01 | Initial damper position when the damper control is enabled [1] |
| Control loops | |||
| Real | timChe | 30 | Threshold time to check the zone temperature status [s] |
| Distribution effectiveness | |||
| Real | zonDisEff_cool | 1.0 | Zone cooling air distribution effectiveness [1] |
| Real | zonDisEff_heat | 0.8 | Zone heating air distribution effectiveness [1] |
| Time-based suppresion | |||
| Real | samplePeriod | 120 | Sample period of component, set to the same value as the trim and respond that process static pressure reset [s] |
Connectors
| Type | Name | Description |
|---|---|---|
| input RealInput | TZon | Measured room temperature [K] |
| input RealInput | TCooSet | Setpoint temperature for room for cooling [K] |
| input RealInput | THeaSet | Setpoint temperature for room for heating [K] |
| input BooleanInput | u1Win | Window status, normally closed (true), when windows open, it becomes false |
| input BooleanInput | u1Occ | True: the zone is populated |
| input IntegerInput | uOpeMod | Zone operation mode |
| input RealInput | ppmCO2Set | CO2 concentration setpoint |
| input RealInput | ppmCO2 | Detected CO2 concentration |
| input RealInput | TDis | Measured discharge air temperature [K] |
| input RealInput | TColSup | Cold duct supply air temperature from central air handler [K] |
| input RealInput | VColDucDis_flow | Measured cold-duct discharge airflow rate airflow rate [m3/s] |
| input BooleanInput | u1CooAHU | Cooling air handler status |
| input RealInput | THotSup | Hot duct supply air temperature from central air handler [K] |
| input RealInput | VHotDucDis_flow | Measured hot-duct discharge airflow rate airflow rate [m3/s] |
| input BooleanInput | u1HeaAHU | Heating air handler status |
| input IntegerInput | oveFloSet | Index of overriding flow setpoint, 1: set to zero; 2: set to cooling maximum; 3: set to minimum flow; 4: set to heating maximum |
| input IntegerInput | oveCooDamPos | Index of overriding cooling damper position, 1: set to close; 2: set to open |
| input IntegerInput | oveHeaDamPos | Index of overriding heating damper position, 1: set to close; 2: set to open |
| output RealOutput | VSet_flow | Airflow setpoint after considering override [m3/s] |
| output RealOutput | yCooDam | Cooling damper commanded position, or commanded flow rate ratio [1] |
| output RealOutput | yHeaDam | Heating damper commanded position, or commanded flow rate ratio [1] |
| output RealOutput | VAdjPopBreZon_flow | Adjusted population component breathing zone flow rate [m3/s] |
| output RealOutput | VAdjAreBreZon_flow | Adjusted area component breathing zone flow rate [m3/s] |
| output RealOutput | VMinOA_flow | Minimum outdoor airflow setpoint [m3/s] |
| output RealOutput | VZonAbsMin_flow | Zone absolute minimum outdoor airflow setpoint [m3/s] |
| output RealOutput | VZonDesMin_flow | Zone design minimum outdoor airflow setpoint [m3/s] |
| output RealOutput | yCO2 | CO2 control loop signal [1] |
| output IntegerOutput | yZonCooTemResReq | Zone cooling supply air temperature reset request |
| output IntegerOutput | yColDucPreResReq | Cold duct pressure reset requests |
| output IntegerOutput | yZonHeaTemResReq | Zone heating supply air temperature reset request |
| output IntegerOutput | yHotDucPreResReq | Hot duct pressure reset requests |
| output IntegerOutput | yHeaFanReq | Heating fan request |
| output IntegerOutput | yLowFloAla | Low airflow alarms |
| output IntegerOutput | yColFloSenAla | Cold-duct airflow sensor calibration alarm |
| output IntegerOutput | yColLeaDamAla | Leaking cold-duct damper alarm |
| output IntegerOutput | yHotFloSenAla | Hot-duct airflow sensor calibration alarm |
| output IntegerOutput | yHotLeaDamAla | Leaking hot-duct damper alarm |
Modelica definition
block Controller "Controller for dual-duct terminal unit with cold-duct minimum control"
parameter Buildings.Controls.OBC.ASHRAE.G36.Types.VentilationStandard venStd
"Ventilation standard, ASHRAE 62.1 or Title 24";
parameter Boolean have_winSen=true
"True: the zone has window sensor";
parameter Boolean have_occSen=true
"True: the zone has occupancy sensor";
parameter Boolean have_CO2Sen=true
"True: the zone has CO2 sensor";
parameter Boolean permit_occStandby=true
"True: occupied-standby mode is permitted";
parameter Real VOccMin_flow(unit="m3/s")
"Zone minimum outdoor airflow for occupants";
parameter Real VAreMin_flow(unit="m3/s")
"Zone minimum outdoor airflow for building area";
// ---------------- Design parameters ----------------
parameter Real VAreBreZon_flow(unit="m3/s")
"Design area component of the breathing zone outdoor airflow";
parameter Real VPopBreZon_flow(unit="m3/s")
"Design population component of the breathing zone outdoor airflow";
parameter Real VMin_flow(unit="m3/s")
"Design zone minimum airflow setpoint";
parameter Real VCooMax_flow(unit="m3/s")
"Design zone cooling maximum airflow rate";
parameter Real VHeaMax_flow(unit="m3/s")
"Design zone heating maximum airflow rate";
// ---------------- Control loop parameters ----------------
parameter Real kCooCon=0.1
"Gain of controller for cooling control loop";
parameter Real TiCooCon(unit="s")=900
"Time constant of integrator block for cooling control loop";
parameter Real kHeaCon=0.1
"Gain of controller for heating control loop";
parameter Real TiHeaCon(unit="s")=900
"Time constant of integrator block for heating control loop";
// ---------------- Dampers control parameters ----------------
parameter CDL.Types.SimpleController controllerTypeDam=
Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Type of controller";
parameter Real kDam=0.5
"Gain of controller for damper control";
parameter Real TiDam(unit="s")=300
"Time constant of integrator block for damper control";
parameter Real TdDam(unit="s")=0.1
"Time constant of derivative block for damper control";
// ---------------- System request parameters ----------------
parameter Real thrTemDif(unit="K")=3
"Threshold difference between zone temperature and cooling setpoint for generating 3 cooling SAT reset requests";
parameter Real twoTemDif(unit="K")=2
"Threshold difference between zone temperature and cooling setpoint for generating 2 cooling SAT reset requests";
parameter Real durTimTem(unit="s")=120
"Duration time of zone temperature exceeds setpoint";
parameter Real durTimFlo(unit="s")=60
"Duration time of airflow rate less than setpoint";
// ---------------- Parameters for alarms ----------------
parameter Real staPreMul=1
"Importance multiplier for the zone static pressure reset control loop";
parameter Real lowFloTim(unit="s")=300
"Threshold time to check low flow rate";
parameter Real fanOffTim(unit="s")=600
"Threshold time to check fan off";
parameter Real leaFloTim(unit="s")=600
"Threshold time to check damper leaking airflow";
// ---------------- Parameters for time-based suppression ----------------
parameter Real chaRat(final unit="s/K")=540
"Gain factor to calculate suppression time based on the change of the setpoint, seconds per Kelvin";
parameter Real maxSupTim(unit="s")=1800
"Maximum suppression time";
// ---------------- Advanced parameters ----------------
parameter Real dTHys(unit="K")=0.25
"Near zero temperature difference, below which the difference will be seen as zero";
parameter Real looHys(unit="1")=0.01
"Loop output hysteresis below which the output will be seen as zero";
parameter Real floHys(unit="m3/s")=0.01*VMin_flow
"Near zero flow rate, below which the flow rate or difference will be seen as zero";
parameter Real damPosHys(unit="1")=0.005
"Near zero damper position, below which the damper will be seen as closed";
parameter Real staTim(
final unit="s",
final quantity="Time")=1800
"Delay triggering alarms after enabling AHU supply fan";
parameter Real iniDam(unit="1")=0.01
"Initial damper position when the damper control is enabled";
parameter Real timChe(unit="s")=30
"Threshold time to check the zone temperature status";
parameter Real zonDisEff_cool(unit="1")=1.0
"Zone cooling air distribution effectiveness";
parameter Real zonDisEff_heat(unit="1")=0.8
"Zone heating air distribution effectiveness";
parameter Real samplePeriod(unit="s")=120
"Sample period of component, set to the same value as the trim and respond that process static pressure reset";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TZon(
final quantity="ThermodynamicTemperature",
final unit="K",
final displayUnit="degC")
"Measured room temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TCooSet(
final quantity="ThermodynamicTemperature",
final unit="K",
final displayUnit="degC") "Setpoint temperature for room for cooling";
Buildings.Controls.OBC.CDL.Interfaces.RealInput THeaSet(
final quantity="ThermodynamicTemperature",
final unit="K",
final displayUnit="degC") "Setpoint temperature for room for heating";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1Win if have_winSen
"Window status, normally closed (true), when windows open, it becomes false";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1Occ if have_occSen
"True: the zone is populated";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uOpeMod
"Zone operation mode";
Buildings.Controls.OBC.CDL.Interfaces.RealInput ppmCO2Set if have_CO2Sen
"CO2 concentration setpoint";
Buildings.Controls.OBC.CDL.Interfaces.RealInput ppmCO2 if have_CO2Sen
"Detected CO2 concentration";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TDis(
final quantity="ThermodynamicTemperature",
final unit="K",
final displayUnit="degC") "Measured discharge air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TColSup(
final quantity="ThermodynamicTemperature",
final unit="K",
final displayUnit="degC")
"Cold duct supply air temperature from central air handler";
Buildings.Controls.OBC.CDL.Interfaces.RealInput VColDucDis_flow(
final min=0,
final unit="m3/s",
final quantity="VolumeFlowRate")
"Measured cold-duct discharge airflow rate airflow rate";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1CooAHU
"Cooling air handler status";
Buildings.Controls.OBC.CDL.Interfaces.RealInput THotSup(
final quantity="ThermodynamicTemperature",
final unit="K",
final displayUnit="degC")
"Hot duct supply air temperature from central air handler";
Buildings.Controls.OBC.CDL.Interfaces.RealInput VHotDucDis_flow(
final min=0,
final unit="m3/s",
final quantity="VolumeFlowRate")
"Measured hot-duct discharge airflow rate airflow rate";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1HeaAHU
"Heating air handler status";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput oveFloSet
"Index of overriding flow setpoint, 1: set to zero; 2: set to cooling maximum; 3: set to minimum flow; 4: set to heating maximum";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput oveCooDamPos
"Index of overriding cooling damper position, 1: set to close; 2: set to open";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput oveHeaDamPos
"Index of overriding heating damper position, 1: set to close; 2: set to open";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput VSet_flow(
final min=0,
final unit="m3/s",
final quantity="VolumeFlowRate")
"Airflow setpoint after considering override";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yCooDam(
final min=0,
final max=1,
final unit="1")
"Cooling damper commanded position, or commanded flow rate ratio";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yHeaDam(
final min=0,
final max=1,
final unit="1")
"Heating damper commanded position, or commanded flow rate ratio";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput VAdjPopBreZon_flow(
final quantity="VolumeFlowRate",
final unit="m3/s") if venStd == Buildings.Controls.OBC.ASHRAE.G36.Types.VentilationStandard.ASHRAE62_1
"Adjusted population component breathing zone flow rate";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput VAdjAreBreZon_flow(
final quantity="VolumeFlowRate",
final unit="m3/s") if venStd == Buildings.Controls.OBC.ASHRAE.G36.Types.VentilationStandard.ASHRAE62_1
"Adjusted area component breathing zone flow rate";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput VMinOA_flow(
final quantity="VolumeFlowRate",
final unit="m3/s") if venStd == Buildings.Controls.OBC.ASHRAE.G36.Types.VentilationStandard.ASHRAE62_1
"Minimum outdoor airflow setpoint";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput VZonAbsMin_flow(
final quantity="VolumeFlowRate",
final unit="m3/s") if venStd == Buildings.Controls.OBC.ASHRAE.G36.Types.VentilationStandard.California_Title_24
"Zone absolute minimum outdoor airflow setpoint";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput VZonDesMin_flow(
final quantity="VolumeFlowRate",
final unit="m3/s") if venStd == Buildings.Controls.OBC.ASHRAE.G36.Types.VentilationStandard.California_Title_24
"Zone design minimum outdoor airflow setpoint";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yCO2(
final unit="1") if venStd == Buildings.Controls.OBC.ASHRAE.G36.Types.VentilationStandard.California_Title_24
"CO2 control loop signal";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yZonCooTemResReq
"Zone cooling supply air temperature reset request";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yColDucPreResReq
"Cold duct pressure reset requests";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yZonHeaTemResReq
"Zone heating supply air temperature reset request";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yHotDucPreResReq
"Hot duct pressure reset requests";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yHeaFanReq
"Heating fan request";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yLowFloAla
"Low airflow alarms";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yColFloSenAla
"Cold-duct airflow sensor calibration alarm";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yColLeaDamAla
"Leaking cold-duct damper alarm";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yHotFloSenAla
"Hot-duct airflow sensor calibration alarm";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yHotLeaDamAla
"Leaking hot-duct damper alarm";
Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Subsequences.ActiveAirFlow
actAirSet(
final VCooMax_flow=VCooMax_flow,
final VHeaMax_flow=VHeaMax_flow,
final floHys=floHys) "Active airflow setpoint";
Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Subsequences.SystemRequests
sysReq(
final thrTemDif=thrTemDif,
final twoTemDif=twoTemDif,
final durTimTem=durTimTem,
final durTimFlo=durTimFlo,
final dTHys=dTHys,
final floHys=floHys,
final looHys=looHys,
final damPosHys=damPosHys) "Specify system requests ";
Buildings.Controls.OBC.ASHRAE.G36.ThermalZones.ControlLoops conLoo(
final kCooCon=kCooCon,
final TiCooCon=TiCooCon,
final kHeaCon=kHeaCon,
final TiHeaCon=TiHeaCon,
final timChe=timChe,
final dTHys=dTHys,
final looHys=looHys) "Heating and cooling control loop";
Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Subsequences.Alarms
ala(
final staPreMul=staPreMul,
final VCooMax_flow=VCooMax_flow,
final VHeaMax_flow=VHeaMax_flow,
final lowFloTim=lowFloTim,
final fanOffTim=fanOffTim,
final leaFloTim=leaFloTim,
final floHys=floHys,
final damPosHys=damPosHys,
final staTim=staTim) "Generate alarms";
Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Subsequences.Overrides
setOve(
final VMin_flow=VMin_flow,
final VCooMax_flow=VCooMax_flow,
final VHeaMax_flow=VHeaMax_flow) "Override setpoints";
Buildings.Controls.OBC.ASHRAE.G36.Generic.TimeSuppression timSupCoo(
final samplePeriod=samplePeriod,
final chaRat=chaRat,
final maxTim=maxSupTim,
final dTHys=dTHys)
"Specify suppresion time due to the zone cooling setpoint change and check if it has passed the suppresion period";
Buildings.Controls.OBC.ASHRAE.G36.VentilationZones.ASHRAE62_1.Setpoints setPoi(
final have_winSen=have_winSen,
final have_occSen=have_occSen,
final have_CO2Sen=have_CO2Sen,
final have_typTerUni=true,
final permit_occStandby=permit_occStandby,
final VAreBreZon_flow=VAreBreZon_flow,
final VPopBreZon_flow=VPopBreZon_flow,
final VMin_flow=VMin_flow,
final VCooMax_flow=VCooMax_flow,
final zonDisEff_cool=zonDisEff_cool,
final zonDisEff_heat=zonDisEff_heat,
final dTHys=dTHys) if venStd == Buildings.Controls.OBC.ASHRAE.G36.Types.VentilationStandard.ASHRAE62_1
"Output the minimum outdoor airflow rate setpoint, when using ASHRAE 62.1";
Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctColdDuctMin.Subsequences.Dampers
damDuaSen(
final VCooMax_flow=VCooMax_flow,
final VHeaMax_flow=VHeaMax_flow,
final controllerTypeDam=controllerTypeDam,
final kDam=kDam,
final TiDam=TiDam,
final TdDam=TdDam,
final dTHys=dTHys,
final looHys=looHys,
final iniDam=iniDam)
"Dampers control when the unit has single dual airflow sensor";
Buildings.Controls.OBC.ASHRAE.G36.Generic.TimeSuppression timSupHea(
final samplePeriod=samplePeriod,
final chaRat=chaRat,
final maxTim=maxSupTim,
final dTHys=dTHys)
"Specify suppresion time due to the zone heating setpoint change and check if it has passed the suppresion period";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant cooMax(
final k=VCooMax_flow)
"Cooling maximum flow";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant heaMax(
final k=VHeaMax_flow)
"Heating maximum flow";
Buildings.Controls.OBC.CDL.Reals.Add add2
"Sum of minimum flow and cooling maximum flow";
Buildings.Controls.OBC.CDL.Reals.Greater gre(
final h=floHys)
"Check if cooling maximum is greater than the sum of minimum and heating maximum flow";
Buildings.Controls.OBC.CDL.Utilities.Assert assMes(
final message="Warning: the sum of minimum flow and heating maximum flow is greater than the cooling maximum flow.")
"Generate warning when the cooling maximum is less than the sum of heating maximum and the minimum flow";
Buildings.Controls.OBC.ASHRAE.G36.VentilationZones.Title24.Setpoints minFlo(
final have_winSen=have_winSen,
final have_occSen=have_occSen,
final have_CO2Sen=have_CO2Sen,
final have_typTerUni=true,
final VOccMin_flow=VOccMin_flow,
final VAreMin_flow=VAreMin_flow,
final VMin_flow=VMin_flow,
final VCooMax_flow=VCooMax_flow)
if venStd == Buildings.Controls.OBC.ASHRAE.G36.Types.VentilationStandard.California_Title_24
"Output the minimum outdoor airflow rate setpoint, when using Title 24";
equation
connect(TZon, timSupCoo.TZon);
connect(TZon, timSupHea.TZon);
connect(TCooSet, timSupCoo.TSet);
connect(THeaSet, timSupHea.TSet);
connect(TCooSet, conLoo.TCooSet);
connect(TZon, conLoo.TZon);
connect(THeaSet, conLoo.THeaSet);
connect(u1Win, setPoi.u1Win);
connect(u1Occ, setPoi.u1Occ);
connect(uOpeMod, setPoi.uOpeMod);
connect(ppmCO2, setPoi.ppmCO2);
connect(TZon, setPoi.TZon);
connect(TDis, setPoi.TDis);
connect(uOpeMod, actAirSet.uOpeMod);
connect(setPoi.VOccZonMin_flow, actAirSet.VOccMin_flow);
connect(conLoo.yCoo, damDuaSen.uCoo);
connect(actAirSet.VActCooMax_flow, damDuaSen.VActCooMax_flow);
connect(VColDucDis_flow, damDuaSen.VColDucDis_flow);
connect(u1CooAHU, damDuaSen.u1CooAHU);
connect(actAirSet.VActMin_flow, damDuaSen.VActMin_flow);
connect(TZon, damDuaSen.TZon);
connect(conLoo.yHea, damDuaSen.uHea);
connect(actAirSet.VActHeaMax_flow, damDuaSen.VActHeaMax_flow);
connect(VHotDucDis_flow, damDuaSen.VHotDucDis_flow);
connect(u1HeaAHU, damDuaSen.u1HeaAHU);
connect(oveFloSet, setOve.oveFloSet);
connect(oveCooDamPos, setOve.oveCooDamPos);
connect(oveHeaDamPos, setOve.oveHeaDamPos);
connect(damDuaSen.yCooDam, setOve.uCooDam);
connect(damDuaSen.yHeaDam, setOve.uHeaDam);
connect(damDuaSen.VDis_flow_Set, setOve.VActSet_flow);
connect(setOve.VSet_flow, VSet_flow);
connect(setOve.yCooDam, yCooDam);
connect(setOve.yHeaDam, yHeaDam);
connect(sysReq.yZonCooTemResReq, yZonCooTemResReq);
connect(sysReq.yColDucPreResReq, yColDucPreResReq);
connect(sysReq.yZonHeaTemResReq, yZonHeaTemResReq);
connect(sysReq.yHotDucPreResReq, yHotDucPreResReq);
connect(sysReq.yHeaFanReq, yHeaFanReq);
connect(ala.yColFloSenAla, yColFloSenAla);
connect(ala.yColLeaDamAla, yColLeaDamAla);
connect(ala.yHotFloSenAla, yHotFloSenAla);
connect(timSupCoo.yAftSup, sysReq.uAftSupCoo);
connect(TCooSet, sysReq.TCooSet);
connect(TDis, sysReq.TZon);
connect(conLoo.yCoo, sysReq.uCoo);
connect(damDuaSen.VColDucDis_flow_Set, sysReq.VColDuc_flow_Set);
connect(VColDucDis_flow, sysReq.VColDucDis_flow);
connect(timSupHea.yAftSup, sysReq.uAftSupHea);
connect(THeaSet, sysReq.THeaSet);
connect(conLoo.yHea, sysReq.uHea);
connect(damDuaSen.VHotDucDis_flow_Set, sysReq.VHotDuc_flow_Set);
connect(VHotDucDis_flow, sysReq.VHotDucDis_flow);
connect(setOve.VSet_flow, ala.VActSet_flow);
connect(VColDucDis_flow, ala.VColDucDis_flow);
connect(u1CooAHU, ala.u1CooFan);
connect(VHotDucDis_flow, ala.VHotDucDis_flow);
connect(u1HeaAHU, ala.u1HeaFan);
connect(ala.yLowFloAla, yLowFloAla);
connect(ala.yHotLeaDamAla, yHotLeaDamAla);
connect(TColSup, damDuaSen.TColSup);
connect(THotSup, damDuaSen.THotSup);
connect(heaMax.y, add2.u1);
connect(setPoi.VOccZonMin_flow, add2.u2);
connect(cooMax.y, gre.u1);
connect(add2.y, gre.u2);
connect(gre.y, assMes.u);
connect(ppmCO2Set, setPoi.ppmCO2Set);
connect(u1Win, minFlo.u1Win);
connect(u1Occ, minFlo.u1Occ);
connect(uOpeMod, minFlo.uOpeMod);
connect(ppmCO2Set, minFlo.ppmCO2Set);
connect(ppmCO2, minFlo.ppmCO2);
connect(minFlo.VOccZonMin_flow, actAirSet.VOccMin_flow);
connect(minFlo.VOccZonMin_flow, add2.u2);
connect(setPoi.VAdjPopBreZon_flow, VAdjPopBreZon_flow);
connect(setPoi.VAdjAreBreZon_flow, VAdjAreBreZon_flow);
connect(setPoi.VMinOA_flow, VMinOA_flow);
connect(minFlo.VZonAbsMin_flow, VZonAbsMin_flow);
connect(minFlo.VZonDesMin_flow, VZonDesMin_flow);
connect(minFlo.yCO2, yCO2);
connect(setOve.yCooDam, sysReq.uCooDam);
connect(setOve.yCooDam, ala.uCooDam);
connect(setOve.yHeaDam, sysReq.uHeaDam);
connect(setOve.yHeaDam, ala.uHeaDam);
connect(uOpeMod, ala.uOpeMod);
end Controller;