Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV
Sequences for multi zone VAV AHU control
Information
This package contains control sequences from ASHRAE Guideline 36, Part 5.N for multi zone VAV air handling unit control.
Package Content
| Name | Description |
|---|---|
 Controller
|
Multizone AHU controller that composes subsequences for controlling fan speed, dampers, and supply air temperature |
 Economizers
|
Economizer control of multi zone VAV AHU |
 SetPoints
|
Output setpoints for AHU control |
 Validation
|
Collection of validation models |
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Controller
Multizone AHU controller that composes subsequences for controlling fan speed, dampers, and supply air temperature
Information
Block that is applied for multizone VAV AHU control. It outputs the supply fan status and the operation speed, outdoor and return air damper position, supply air temperature setpoint and the valve position of the cooling and heating coils. It is implemented according to the ASHRAE Guideline 36, PART5.N.
The sequence consists of five subsequences.
Supply fan speed control
The fan speed control is implemented according to PART5.N.1. It outputs
the boolean signal ySupFan to turn on or off the supply fan.
In addition, based on the pressure reset request uZonPreResReq
from the VAV zones controller, the
sequence resets the duct pressure setpoint, and uses this setpoint
to modulate the fan speed ySupFanSpe using a PI controller.
See
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.SupplyFan
for more detailed description.
Minimum outdoor airflow setting
According to current occupany nOcc, supply operation status
ySupFan, zone temperatures TZon and the discharge
air temperature TDis, the sequence computes the minimum outdoor airflow rate
setpoint, which is used as input for the economizer control. More detailed
information can be found in
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.OutsideAirFlow.
Economizer control
The block outputs outdoor and return air damper position, yOutDamPos and
yRetDamPos. First, it computes the position limits to satisfy the minimum
outdoor airflow requirement. Second, it determines the availability of the economizer based
on the outdoor condition. The dampers are modulated to track the supply air temperature
loop signal, which is calculated from the sequence below, subject to the minimum outdoor airflow
requirement and economizer availability. Optionally, there is also an override for freeze protection.
See
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Economizers.Controller
for more detailed description.
Supply air temperature setpoint
Based on PART5.N.2, the sequence first sets the maximum supply air temperature
based on reset requests collected from each zone uZonTemResReq. The
outdoor temperature TOut and operation mode uOpeMod are used
along with the maximum supply air temperature, for computing the supply air temperature
setpoint. See
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.SupplyTemperature
for more detailed description.
Coil valve control
The subsequence retrieves supply air temperature setpoint from previous sequence. Along with the measured supply air temperature and the supply fan status, it generates coil valve positions. See Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.SupplySignals
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Time | samplePeriod | 120 | Sample period of component, set to the same value to the trim and respond sequence [s] |
| System and building parameters | |||
| Integer | numZon | numZon( ... | Total number of served VAV boxes |
| Area | AFlo[numZon] | Floor area of each zone [m2] | |
| Boolean | have_occSen | false | Set to true if zones have occupancy sensor |
| Boolean | have_winSen | false | Set to true if zones have window status sensor |
| Boolean | have_perZonRehBox | true | Check if there is any VAV-reheat boxes on perimeter zones |
| Boolean | have_duaDucBox | false | Check if the AHU serves dual duct boxes |
| Boolean | have_airFloMeaSta | false | Check if the AHU has AFMS (Airflow measurement station) |
| Economizer PID controller | |||
| SimpleController | controllerTypeMinOut | Buildings.Controls.OBC.CDL.T... | Type of controller |
| Real | kMinOut | 0.05 | Gain of controller for minimum outdoor air intake [1] |
| Time | TiMinOut | 1200 | Time constant of controller for minimum outdoor air intake [s] |
| Time | TdMinOut | 0.1 | Time constant of derivative block for minimum outdoor air intake [s] |
| Economizer freeze protection | |||
| Boolean | use_TMix | true | Set to true if mixed air temperature measurement is enabled |
| Boolean | use_G36FrePro | false | Set to true to use G36 freeze protection |
| SimpleController | controllerTypeFre | Buildings.Controls.OBC.CDL.T... | Type of controller |
| Real | kFre | 0.1 | Gain for mixed air temperature tracking for freeze protection, used if use_TMix=true [1/K] |
| Time | TiFre | 120 | Time constant of controller for mixed air temperature tracking for freeze protection. Require TiFre < TiMinOut [s] |
| Time | TdFre | 0.1 | Time constant of derivative block for freeze protection [s] |
| Temperature | TFreSet | 279.15 | Lower limit for mixed air temperature for freeze protection, used if use_TMix=true [K] |
| Fan speed PID controller | |||
| SimpleController | controllerTypeFanSpe | Buildings.Controls.OBC.CDL.T... | Type of controller |
| Real | kFanSpe | 0.1 | Gain of fan fan speed controller, normalized using pMaxSet [1] |
| Time | TiFanSpe | 60 | Time constant of integrator block for fan speed [s] |
| Time | TdFanSpe | 0.1 | Time constant of derivative block for fan speed [s] |
| Real | yFanMax | 1 | Maximum allowed fan speed |
| Real | yFanMin | 0.1 | Lowest allowed fan speed if fan is on |
| Supply air temperature | |||
| SimpleController | controllerTypeTSup | Buildings.Controls.OBC.CDL.T... | Type of controller for supply air temperature signal |
| Real | kTSup | 0.05 | Gain of controller for supply air temperature signal [1/K] |
| Time | TiTSup | 600 | Time constant of integrator block for supply air temperature control signal [s] |
| Time | TdTSup | 0.1 | Time constant of integrator block for supply air temperature control signal [s] |
| Real | uHeaMax | -0.25 | Upper limit of controller signal when heating coil is off. Require -1 < uHeaMax < uCooMin < 1. |
| Real | uCooMin | 0.25 | Lower limit of controller signal when cooling coil is off. Require -1 < uHeaMax < uCooMin < 1. |
| Economizer | |||
| Boolean | use_enthalpy | false | Set to true if enthalpy measurement is used in addition to temperature measurement |
| Time | delta | 5 | Time horizon over which the outdoor air flow measurment is averaged [s] |
| TemperatureDifference | delTOutHis | 1 | Delta between the temperature hysteresis high and low limit [K] |
| SpecificEnergy | delEntHis | 1000 | Delta between the enthalpy hysteresis high and low limits [J/kg] |
| Damper limits | |||
| Real | retDamPhyPosMax | 1 | Physically fixed maximum position of the return air damper [1] |
| Real | retDamPhyPosMin | 0 | Physically fixed minimum position of the return air damper [1] |
| Real | outDamPhyPosMax | 1 | Physically fixed maximum position of the outdoor air damper [1] |
| Real | outDamPhyPosMin | 0 | Physically fixed minimum position of the outdoor air damper [1] |
| Real | yMinDamLim | 0 | Lower limit of damper position limits control signal output |
| Real | yMaxDamLim | 1 | Upper limit of damper position limits control signal output |
| Economizer delays at disable | |||
| Time | retDamFulOpeTim | 180 | Time period to keep RA damper fully open before releasing it for minimum outdoor airflow control at disable to avoid pressure fluctuations [s] |
| Time | disDel | 15 | Short time delay before closing the OA damper at disable to avoid pressure fluctuations [s] |
| Fan speed | |||
| Trim and respond for reseting duct static pressure setpoint | |||
| PressureDifference | pIniSet | 60 | Initial pressure setpoint for fan speed control [Pa] |
| PressureDifference | pMinSet | 25 | Minimum pressure setpoint for fan speed control [Pa] |
| PressureDifference | pMaxSet | 400 | Maximum pressure setpoint for fan speed control [Pa] |
| Time | pDelTim | 600 | Delay time after which trim and respond is activated [s] |
| Integer | pNumIgnReq | 2 | Number of ignored requests for fan speed control |
| PressureDifference | pTriAmo | -12.0 | Trim amount for fan speed control [Pa] |
| PressureDifference | pResAmo | 15 | Respond amount (must be opposite in to triAmo) for fan speed control [Pa] |
| PressureDifference | pMaxRes | 32 | Maximum response per time interval (same sign as resAmo) for fan speed control [Pa] |
| Minimum outdoor airflow rate | |||
| Real | zonDisEffHea[numZon] | fill(0.8, outAirSetPoi.numZon) | Zone air distribution effectiveness during heating |
| Real | zonDisEffCoo[numZon] | fill(1.0, outAirSetPoi.numZon) | Zone air distribution effectiveness during cooling |
| Nominal conditions | |||
| Real | occDen[numZon] | fill(0.05, outAirSetPoi.numZ... | Default number of person in unit area [1/m2] |
| Real | VOutPerAre_flow[numZon] | fill(3e-4, outAirSetPoi.numZ... | Outdoor air rate per unit area [m3/(s.m2)] |
| VolumeFlowRate | VOutPerPer_flow[numZon] | fill(2.5e-3, outAirSetPoi.nu... | Outdoor air rate per person [m3/s] |
| VolumeFlowRate | minZonPriFlo[numZon] | Minimum expected zone primary flow rate [m3/s] | |
| VolumeFlowRate | VPriSysMax_flow | Maximum expected system primary airflow at design stage [m3/s] | |
| Real | desZonDisEff[numZon] | fill(1.0, outAirSetPoi.numZon) | Design zone air distribution effectiveness |
| Real | desZonPop[numZon] | {outAirSetPoi.occDen[i]*outA... | Design zone population during peak occupancy |
| Real | peaSysPop | 1.2*sum({outAirSetPoi.occDen... | Peak system population |
| Supply air temperature | |||
| Temperature limits | |||
| Temperature | TSupSetMin | 285.15 | Lowest cooling supply air temperature setpoint [K] |
| Temperature | TSupSetMax | 291.15 | Highest cooling supply air temperature setpoint. It is typically 18 degC (65 degF) in mild and dry climates, 16 degC (60 degF) or lower in humid climates [K] |
| Temperature | TSupSetDes | 286.15 | Nominal supply air temperature setpoint [K] |
| Temperature | TOutMin | 289.15 | Lower value of the outdoor air temperature reset range. Typically value is 16 degC (60 degF) [K] |
| Temperature | TOutMax | 294.15 | Higher value of the outdoor air temperature reset range. Typically value is 21 degC (70 degF) [K] |
| Trim and respond for reseting TSup setpoint | |||
| Temperature | iniSetSupTem | supTemSetPoi.maxSet | Initial setpoint for supply temperature control [K] |
| Temperature | maxSetSupTem | supTemSetPoi.TSupSetMax | Maximum setpoint for supply temperature control [K] |
| Temperature | minSetSupTem | supTemSetPoi.TSupSetDes | Minimum setpoint for supply temperature control [K] |
| Time | delTimSupTem | 600 | Delay timer for supply temperature control [s] |
| Integer | numIgnReqSupTem | 2 | Number of ignorable requests for supply temperature control |
| TemperatureDifference | triAmoSupTem | 0.1 | Trim amount for supply temperature control [K] |
| TemperatureDifference | resAmoSupTem | -0.2 | Response amount for supply temperature control [K] |
| TemperatureDifference | maxResSupTem | -0.6 | Maximum response per time interval for supply temperature control [K] |
Connectors
| Type | Name | Description |
|---|---|---|
| input RealInput | VDis_flow[numZon] | Primary airflow rate to the ventilation zone from the air handler, including outdoor air and recirculated air [m3/s] |
| input RealInput | TMix | Measured mixed air temperature, used for freeze protection if use_TMix=true [K] |
| input RealInput | ducStaPre | Measured duct static pressure [Pa] |
| input RealInput | TOut | Outdoor air temperature [K] |
| input RealInput | TOutCut | OA temperature high limit cutoff. For differential dry bulb temeprature condition use return air temperature measurement [K] |
| input RealInput | hOut | Outdoor air enthalpy [J/kg] |
| input RealInput | hOutCut | OA enthalpy high limit cutoff. For differential enthalpy use return air enthalpy measurement [J/kg] |
| input RealInput | TSup | Measured supply air temperature [K] |
| input RealInput | TZonHeaSet | Zone air temperature heating setpoint [K] |
| input RealInput | VOut_flow | Measured outdoor volumetric airflow rate [m3/s] |
| input RealInput | nOcc[numZon] | Number of occupants |
| input RealInput | TZon[numZon] | Measured zone air temperature [K] |
| input RealInput | TDis[numZon] | Discharge air temperature [K] |
| input RealInput | TZonCooSet | Zone air temperature cooling setpoint [K] |
| input IntegerInput | uZonTemResReq | Zone cooling supply air temperature reset request |
| input IntegerInput | uZonPreResReq | Zone static pressure reset requests |
| input IntegerInput | uOpeMod | AHU operation mode status signal |
| input BooleanInput | uWin[numZon] | Window status, true if open, false if closed |
| input IntegerInput | uFreProSta | Freeze protection status, used if use_G36FrePro=true |
| output RealOutput | TSupSet | Setpoint for supply air temperature [K] |
| output RealOutput | yHea | Control signal for heating [1] |
| output RealOutput | yCoo | Control signal for cooling [1] |
| output RealOutput | ySupFanSpe | Supply fan speed [1] |
| output RealOutput | yRetDamPos | Return air damper position [1] |
| output RealOutput | yOutDamPos | Outdoor air damper position [1] |
| output BooleanOutput | ySupFan | Supply fan status, true if fan should be on |
Modelica definition
block Controller "Multizone AHU controller that composes subsequences for controlling fan speed, dampers, and supply air temperature"
parameter Modelica.SIunits.Time samplePeriod=120
"Sample period of component, set to the same value to the trim and respond sequence";
parameter Integer numZon(min=2) "Total number of served VAV boxes";
parameter Modelica.SIunits.Area AFlo[numZon] "Floor area of each zone";
parameter Boolean have_occSen=false
"Set to true if zones have occupancy sensor";
parameter Boolean have_winSen=false
"Set to true if zones have window status sensor";
parameter Boolean have_perZonRehBox=true
"Check if there is any VAV-reheat boxes on perimeter zones";
parameter Boolean have_duaDucBox=false
"Check if the AHU serves dual duct boxes";
parameter Boolean have_airFloMeaSta=false
"Check if the AHU has AFMS (Airflow measurement station)";
// ----------- Parameters for economizer control -----------
parameter Boolean use_enthalpy=false
"Set to true if enthalpy measurement is used in addition to temperature measurement";
parameter Modelica.SIunits.Time delta=5
"Time horizon over which the outdoor air flow measurment is averaged";
parameter Modelica.SIunits.TemperatureDifference delTOutHis=1
"Delta between the temperature hysteresis high and low limit";
parameter Modelica.SIunits.SpecificEnergy delEntHis=1000
"Delta between the enthalpy hysteresis high and low limits";
parameter Real retDamPhyPosMax(
final min=0,
final max=1,
final unit="1") = 1
"Physically fixed maximum position of the return air damper";
parameter Real retDamPhyPosMin(
final min=0,
final max=1,
final unit="1") = 0
"Physically fixed minimum position of the return air damper";
parameter Real outDamPhyPosMax(
final min=0,
final max=1,
final unit="1") = 1
"Physically fixed maximum position of the outdoor air damper";
parameter Real outDamPhyPosMin(
final min=0,
final max=1,
final unit="1") = 0
"Physically fixed minimum position of the outdoor air damper";
parameter Buildings.Controls.OBC.CDL.Types.SimpleController controllerTypeMinOut=
Buildings.Controls.OBC.CDL.Types.SimpleController.PI
"Type of controller";
parameter Real kMinOut(final unit="1")=0.05
"Gain of controller for minimum outdoor air intake";
parameter Modelica.SIunits.Time TiMinOut=1200
"Time constant of controller for minimum outdoor air intake";
parameter Modelica.SIunits.Time TdMinOut=0.1
"Time constant of derivative block for minimum outdoor air intake";
parameter Boolean use_TMix=true
"Set to true if mixed air temperature measurement is enabled";
parameter Boolean use_G36FrePro=false
"Set to true to use G36 freeze protection";
parameter Buildings.Controls.OBC.CDL.Types.SimpleController controllerTypeFre=
Buildings.Controls.OBC.CDL.Types.SimpleController.PI
"Type of controller";
parameter Real kFre(final unit="1/K") = 0.1
"Gain for mixed air temperature tracking for freeze protection, used if use_TMix=true";
parameter Modelica.SIunits.Time TiFre(max=TiMinOut)=120
"Time constant of controller for mixed air temperature tracking for freeze protection. Require TiFre < TiMinOut";
parameter Modelica.SIunits.Time TdFre=0.1
"Time constant of derivative block for freeze protection";
parameter Modelica.SIunits.Temperature TFreSet = 279.15
"Lower limit for mixed air temperature for freeze protection, used if use_TMix=true";
parameter Real yMinDamLim=0
"Lower limit of damper position limits control signal output";
parameter Real yMaxDamLim=1
"Upper limit of damper position limits control signal output";
parameter Modelica.SIunits.Time retDamFulOpeTim=180
"Time period to keep RA damper fully open before releasing it for minimum outdoor airflow control
at disable to avoid pressure fluctuations";
parameter Modelica.SIunits.Time disDel=15
"Short time delay before closing the OA damper at disable to avoid pressure fluctuations";
// ----------- parameters for fan speed control -----------
parameter Modelica.SIunits.PressureDifference pIniSet(displayUnit="Pa")=60
"Initial pressure setpoint for fan speed control";
parameter Modelica.SIunits.PressureDifference pMinSet(displayUnit="Pa")=25
"Minimum pressure setpoint for fan speed control";
parameter Modelica.SIunits.PressureDifference pMaxSet(displayUnit="Pa")=400
"Maximum pressure setpoint for fan speed control";
parameter Modelica.SIunits.Time pDelTim=600
"Delay time after which trim and respond is activated";
parameter Integer pNumIgnReq=2
"Number of ignored requests for fan speed control";
parameter Modelica.SIunits.PressureDifference pTriAmo(displayUnit="Pa")=-12.0
"Trim amount for fan speed control";
parameter Modelica.SIunits.PressureDifference pResAmo(displayUnit="Pa")=15
"Respond amount (must be opposite in to triAmo) for fan speed control";
parameter Modelica.SIunits.PressureDifference pMaxRes(displayUnit="Pa")=32
"Maximum response per time interval (same sign as resAmo) for fan speed control";
parameter Buildings.Controls.OBC.CDL.Types.SimpleController
controllerTypeFanSpe=Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Type of controller";
parameter Real kFanSpe(final unit="1")=0.1
"Gain of fan fan speed controller, normalized using pMaxSet";
parameter Modelica.SIunits.Time TiFanSpe=60
"Time constant of integrator block for fan speed";
parameter Modelica.SIunits.Time TdFanSpe=0.1
"Time constant of derivative block for fan speed";
parameter Real yFanMax=1 "Maximum allowed fan speed";
parameter Real yFanMin=0.1 "Lowest allowed fan speed if fan is on";
// ----------- parameters for minimum outdoor airflow setting -----------
parameter Real zonDisEffHea[numZon]=
fill(0.8, outAirSetPoi.numZon)
"Zone air distribution effectiveness during heating";
parameter Real zonDisEffCoo[numZon]=
fill(1.0, outAirSetPoi.numZon)
"Zone air distribution effectiveness during cooling";
parameter Real occDen[numZon](each final unit="1/m2")=
fill(0.05, outAirSetPoi.numZon)
"Default number of person in unit area";
parameter Real VOutPerAre_flow[numZon](each final unit = "m3/(s.m2)")=
fill(3e-4, outAirSetPoi.numZon)
"Outdoor air rate per unit area";
parameter Modelica.SIunits.VolumeFlowRate VOutPerPer_flow[numZon]=
fill(2.5e-3, outAirSetPoi.numZon)
"Outdoor air rate per person";
parameter Modelica.SIunits.VolumeFlowRate minZonPriFlo[numZon]
"Minimum expected zone primary flow rate";
parameter Modelica.SIunits.VolumeFlowRate VPriSysMax_flow
"Maximum expected system primary airflow at design stage";
parameter Real desZonDisEff[numZon]=fill(1.0, outAirSetPoi.numZon)
"Design zone air distribution effectiveness";
parameter Real desZonPop[numZon]={
outAirSetPoi.occDen[i]*outAirSetPoi.AFlo[i]
for i in 1:outAirSetPoi.numZon}
"Design zone population during peak occupancy";
parameter Real peaSysPop=1.2*sum(
{outAirSetPoi.occDen[iZon]*outAirSetPoi.AFlo[iZon]
for iZon in 1:outAirSetPoi.numZon})
"Peak system population";
// parameter Real uLow=-0.5
// "If zone space temperature minus supply air temperature is less than uLow,
// then it should use heating supply air distribution effectiveness"
// annotation (Evaluate=true,
// Dialog(tab="Minimum outdoor airflow rate", group="Advanced"));
// parameter Real uHig=0.5
// "If zone space temperature minus supply air temperature is more than uHig,
// then it should use cooling supply air distribution effectiveness"
// annotation (Evaluate=true,
// Dialog(tab="Minimum outdoor airflow rate", group="Advanced"));
// ----------- parameters for supply air temperature control -----------
parameter Modelica.SIunits.Temperature TSupSetMin=285.15
"Lowest cooling supply air temperature setpoint";
parameter Modelica.SIunits.Temperature TSupSetMax=291.15
"Highest cooling supply air temperature setpoint. It is typically 18 degC (65 degF) in mild and dry climates, 16 degC (60 degF) or lower in humid climates";
parameter Modelica.SIunits.Temperature TSupSetDes=286.15
"Nominal supply air temperature setpoint";
parameter Modelica.SIunits.Temperature TOutMin=289.15
"Lower value of the outdoor air temperature reset range. Typically value is 16 degC (60 degF)";
parameter Modelica.SIunits.Temperature TOutMax=294.15
"Higher value of the outdoor air temperature reset range. Typically value is 21 degC (70 degF)";
parameter Modelica.SIunits.Temperature iniSetSupTem=supTemSetPoi.maxSet
"Initial setpoint for supply temperature control";
parameter Modelica.SIunits.Temperature maxSetSupTem=supTemSetPoi.TSupSetMax
"Maximum setpoint for supply temperature control";
parameter Modelica.SIunits.Temperature minSetSupTem=supTemSetPoi.TSupSetDes
"Minimum setpoint for supply temperature control";
parameter Modelica.SIunits.Time delTimSupTem=600
"Delay timer for supply temperature control";
parameter Integer numIgnReqSupTem=2
"Number of ignorable requests for supply temperature control";
parameter Modelica.SIunits.TemperatureDifference triAmoSupTem=0.1
"Trim amount for supply temperature control";
parameter Modelica.SIunits.TemperatureDifference resAmoSupTem=-0.2
"Response amount for supply temperature control";
parameter Modelica.SIunits.TemperatureDifference maxResSupTem=-0.6
"Maximum response per time interval for supply temperature control";
parameter Buildings.Controls.OBC.CDL.Types.SimpleController controllerTypeTSup=
Buildings.Controls.OBC.CDL.Types.SimpleController.PI
"Type of controller for supply air temperature signal";
parameter Real kTSup(final unit="1/K")=0.05
"Gain of controller for supply air temperature signal";
parameter Modelica.SIunits.Time TiTSup=600
"Time constant of integrator block for supply air temperature control signal";
parameter Modelica.SIunits.Time TdTSup=0.1
"Time constant of integrator block for supply air temperature control signal";
parameter Real uHeaMax(min=-0.9)=-0.25
"Upper limit of controller signal when heating coil is off. Require -1 < uHeaMax < uCooMin < 1.";
parameter Real uCooMin(max=0.9)=0.25
"Lower limit of controller signal when cooling coil is off. Require -1 < uHeaMax < uCooMin < 1.";
Buildings.Controls.OBC.CDL.Interfaces.RealInput VDis_flow[numZon](
each final unit="m3/s",
each quantity="VolumeFlowRate",
each min=0)
"Primary airflow rate to the ventilation zone from the air handler, including outdoor air and recirculated air";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TMix(
final unit="K",
final quantity = "ThermodynamicTemperature") if use_TMix
"Measured mixed air temperature, used for freeze protection if use_TMix=true";
Buildings.Controls.OBC.CDL.Interfaces.RealInput ducStaPre(
final unit="Pa",
displayUnit="Pa")
"Measured duct static pressure";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TOut(
final unit="K",
final quantity="ThermodynamicTemperature") "Outdoor air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TOutCut(
final unit="K",
final quantity="ThermodynamicTemperature")
"OA temperature high limit cutoff. For differential dry bulb temeprature condition use return air temperature measurement";
Buildings.Controls.OBC.CDL.Interfaces.RealInput hOut(
final unit="J/kg",
final quantity="SpecificEnergy") if use_enthalpy "Outdoor air enthalpy";
Buildings.Controls.OBC.CDL.Interfaces.RealInput hOutCut(
final unit="J/kg",
final quantity="SpecificEnergy") if use_enthalpy
"OA enthalpy high limit cutoff. For differential enthalpy use return air enthalpy measurement";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TSup(
final unit="K",
final quantity="ThermodynamicTemperature")
"Measured supply air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TZonHeaSet(
final unit="K",
final quantity="ThermodynamicTemperature")
"Zone air temperature heating setpoint";
Buildings.Controls.OBC.CDL.Interfaces.RealInput VOut_flow(
final unit="m3/s",
final quantity="VolumeFlowRate")
"Measured outdoor volumetric airflow rate";
Buildings.Controls.OBC.CDL.Interfaces.RealInput nOcc[numZon] if have_occSen
"Number of occupants";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TZon[numZon](
each final unit="K",
each final quantity="ThermodynamicTemperature")
"Measured zone air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TDis[numZon](
each final unit="K",
each final quantity="ThermodynamicTemperature")
"Discharge air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TZonCooSet(
final unit="K",
final quantity="ThermodynamicTemperature")
"Zone air temperature cooling setpoint";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uZonTemResReq
"Zone cooling supply air temperature reset request";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uZonPreResReq
"Zone static pressure reset requests";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uOpeMod
"AHU operation mode status signal";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uWin[numZon] if have_winSen
"Window status, true if open, false if closed";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uFreProSta if
use_G36FrePro
"Freeze protection status, used if use_G36FrePro=true";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput TSupSet(
final unit="K",
final quantity="ThermodynamicTemperature")
"Setpoint for supply air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yHea(
final min=0,
final max=1,
final unit="1")
"Control signal for heating";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yCoo(
final min=0,
final max=1,
final unit="1") "Control signal for cooling";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput ySupFanSpe(
final min=0,
final max=1,
final unit="1") "Supply fan speed";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yRetDamPos(
final min=0,
final max=1,
final unit="1") "Return air damper position";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yOutDamPos(
final min=0,
final max=1,
final unit="1") "Outdoor air damper position";
Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput ySupFan
"Supply fan status, true if fan should be on";
Buildings.Controls.OBC.CDL.Continuous.Average TZonSetPoiAve
"Average of all zone set points";
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.OutsideAirFlow
outAirSetPoi(
final AFlo=AFlo,
final VPriSysMax_flow=VPriSysMax_flow,
final minZonPriFlo=minZonPriFlo,
final numZon=numZon,
final have_occSen=have_occSen,
final VOutPerAre_flow=VOutPerAre_flow,
final VOutPerPer_flow=VOutPerPer_flow,
final occDen=occDen,
final zonDisEffHea=zonDisEffHea,
final zonDisEffCoo=zonDisEffCoo,
final desZonDisEff=desZonDisEff,
final desZonPop=desZonPop,
final peaSysPop=peaSysPop,
final have_winSen=have_winSen)
"Controller for minimum outdoor airflow rate";
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.SupplyFan
supFan(
final numZon=numZon,
final samplePeriod=samplePeriod,
final have_perZonRehBox=have_perZonRehBox,
final have_duaDucBox=have_duaDucBox,
final have_airFloMeaSta=have_airFloMeaSta,
final iniSet=pIniSet,
final minSet=pMinSet,
final maxSet=pMaxSet,
final delTim=pDelTim,
final numIgnReq=pNumIgnReq,
final triAmo=pTriAmo,
final resAmo=pResAmo,
final maxRes=pMaxRes,
final controllerType=controllerTypeFanSpe,
final k=kFanSpe,
final Ti=TiFanSpe,
final Td=TdFanSpe,
final yFanMax=yFanMax,
final yFanMin=yFanMin)
"Supply fan controller";
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.SupplyTemperature
supTemSetPoi(
final samplePeriod=samplePeriod,
final TSupSetMin=TSupSetMin,
final TSupSetMax=TSupSetMax,
final TSupSetDes=TSupSetDes,
final TOutMin=TOutMin,
final TOutMax=TOutMax,
final iniSet=iniSetSupTem,
final maxSet=maxSetSupTem,
final minSet=minSetSupTem,
final delTim=delTimSupTem,
final numIgnReq=numIgnReqSupTem,
final triAmo=triAmoSupTem,
final resAmo=resAmoSupTem,
final maxRes=maxResSupTem) "Setpoint for supply temperature";
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Economizers.Controller
eco(
final use_enthalpy=use_enthalpy,
final delTOutHis=delTOutHis,
final delEntHis=delEntHis,
final retDamFulOpeTim=retDamFulOpeTim,
final disDel=disDel,
final controllerTypeMinOut=controllerTypeMinOut,
final kMinOut=kMinOut,
final TiMinOut=TiMinOut,
final TdMinOut=TdMinOut,
final retDamPhyPosMax=retDamPhyPosMax,
final retDamPhyPosMin=retDamPhyPosMin,
final outDamPhyPosMax=outDamPhyPosMax,
final outDamPhyPosMin=outDamPhyPosMin,
final uHeaMax=uHeaMax,
final uCooMin=uCooMin,
final uOutDamMax=(uHeaMax + uCooMin)/2,
final uRetDamMin=(uHeaMax + uCooMin)/2,
final TFreSet=TFreSet,
final controllerTypeFre=controllerTypeFre,
final kFre=kFre,
final TiFre=TiFre,
final TdFre=TdFre,
final delta=delta,
final use_TMix=use_TMix,
final use_G36FrePro=use_G36FrePro) "Economizer controller";
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.SupplySignals
val(
final controllerType=controllerTypeTSup,
final kTSup=kTSup,
final TiTSup=TiTSup,
final TdTSup=TdTSup,
final uHeaMax=uHeaMax,
final uCooMin=uCooMin) "AHU coil valve control";
protected
Buildings.Controls.OBC.CDL.Continuous.Division VOut_flow_normalized(
u1(final unit="m3/s"),
u2(final unit="m3/s"),
y(final unit="1"))
"Normalization of outdoor air flow intake by design minimum outdoor air intake";
equation
connect(eco.yRetDamPos, yRetDamPos);
connect(eco.yOutDamPos, yOutDamPos);
connect(eco.uSupFan, supFan.ySupFan);
connect(supFan.ySupFanSpe, ySupFanSpe);
connect(TOut, eco.TOut);
connect(eco.TOutCut, TOutCut);
connect(eco.hOut, hOut);
connect(eco.hOutCut, hOutCut);
connect(eco.uOpeMod, uOpeMod);
connect(supTemSetPoi.TSupSet, TSupSet);
connect(supTemSetPoi.TOut, TOut);
connect(supTemSetPoi.uSupFan, supFan.ySupFan);
connect(supTemSetPoi.uZonTemResReq, uZonTemResReq);
connect(supTemSetPoi.uOpeMod, uOpeMod);
connect(supFan.uOpeMod, uOpeMod);
connect(supFan.uZonPreResReq, uZonPreResReq);
connect(supFan.ducStaPre, ducStaPre);
connect(eco.VOutMinSet_flow_normalized, outAirSetPoi.VOutMinSet_flow);
connect(outAirSetPoi.nOcc, nOcc);
connect(outAirSetPoi.TZon, TZon);
connect(outAirSetPoi.TDis, TDis);
connect(supFan.ySupFan, outAirSetPoi.uSupFan);
connect(supTemSetPoi.TZonSetAve, TZonSetPoiAve.y);
connect(outAirSetPoi.VDis_flow, VDis_flow);
connect(supFan.VDis_flow, VDis_flow);
connect(supFan.ySupFan, ySupFan);
connect(outAirSetPoi.uOpeMod, uOpeMod);
connect(TZonSetPoiAve.u2, TZonCooSet);
connect(eco.TMix, TMix);
connect(TSup, val.TSup);
connect(supFan.ySupFan, val.uSupFan);
connect(val.uTSup, eco.uTSup);
connect(val.yHea, yHea);
connect(val.yCoo, yCoo);
connect(outAirSetPoi.uWin, uWin);
connect(supTemSetPoi.TSupSet, val.TSupSet);
connect(TZonHeaSet, TZonSetPoiAve.u1);
connect(eco.uFreProSta, uFreProSta);
connect(eco.VOut_flow_normalized, VOut_flow_normalized.y);
connect(outAirSetPoi.VDesOutMin_flow_nominal, VOut_flow_normalized.u2);
connect(VOut_flow_normalized.u1, VOut_flow);
end Controller;