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, PART 5.N.
The sequence consists of five subsequences.
Supply fan speed control
The fan speed control is implemented according to PART 5.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, supply operation status ySupFan,
zone temperatures and the discharge air temperature, 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.OutdoorAirFlow.
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 PART 5.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 |
|---|---|---|---|
| Real | samplePeriod | 120 | Sample period of component, set to the same value to the trim and respond sequence [s] |
| System and building parameters | |||
| 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] |
| Real | TiMinOut | 120 | Time constant of controller for minimum outdoor air intake [s] |
| Real | 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 | 0.05 | Gain for mixed air temperature tracking for freeze protection, used if use_TMix=true [1/K] |
| Real | TiFre | 120 | Time constant of controller for mixed air temperature tracking for freeze protection. Require TiFre <= TiMinOut [s] |
| Real | TdFre | 0.1 | Time constant of derivative block for freeze protection [s] |
| Real | 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] |
| Real | TiFanSpe | 60 | Time constant of integrator block for fan speed [s] |
| Real | 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] |
| Real | TiTSup | 600 | Time constant of integrator block for supply air temperature control signal [s] |
| Real | 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 |
| Real | delta | 5 | Time horizon over which the outdoor air flow measurment is averaged [s] |
| Real | delTOutHis | 1 | Delta between the temperature hysteresis high and low limit [K] |
| Real | 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] |
| Economizer delays at disable | |||
| Real | 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] |
| Real | 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 | |||
| Real | pIniSet | 60 | Initial pressure setpoint for fan speed control [Pa] |
| Real | pMinSet | 25 | Minimum pressure setpoint for fan speed control [Pa] |
| Real | pMaxSet | 400 | Maximum pressure setpoint for fan speed control [Pa] |
| Real | pDelTim | 600 | Delay time after which trim and respond is activated [s] |
| Integer | pNumIgnReq | 2 | Number of ignored requests for fan speed control |
| Real | pTriAmo | -12.0 | Trim amount for fan speed control [Pa] |
| Real | pResAmo | 15 | Respond amount (must be opposite in to triAmo) for fan speed control [Pa] |
| Real | pMaxRes | 32 | Maximum response per time interval (same sign as resAmo) for fan speed control [Pa] |
| Minimum outdoor airflow rate | |||
| Nominal conditions | |||
| Real | VPriSysMax_flow | Maximum expected system primary airflow at design stage [m3/s] | |
| Real | peaSysPop | Peak system population | |
| Supply air temperature | |||
| Temperature limits | |||
| Real | TSupSetMin | 285.15 | Lowest cooling supply air temperature setpoint [K] |
| Real | 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] |
| Real | TSupSetDes | 286.15 | Nominal supply air temperature setpoint [K] |
| Real | TOutMin | 289.15 | Lower value of the outdoor air temperature reset range. Typically value is 16 degC (60 degF) [K] |
| Real | 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 | |||
| Real | iniSetSupTem | TSupSetMax | Initial setpoint for supply temperature control [K] |
| Real | maxSetSupTem | TSupSetMax | Maximum setpoint for supply temperature control [K] |
| Real | minSetSupTem | TSupSetDes | Minimum setpoint for supply temperature control [K] |
| Real | delTimSupTem | 600 | Delay timer for supply temperature control [s] |
| Integer | numIgnReqSupTem | 2 | Number of ignorable requests for supply temperature control |
| Real | triAmoSupTem | 0.1 | Trim amount for supply temperature control [K] |
| Real | resAmoSupTem | -0.2 | Response amount for supply temperature control [K] |
| Real | maxResSupTem | -0.6 | Maximum response per time interval for supply temperature control [K] |
Connectors
| Type | Name | Description |
|---|---|---|
| input RealInput | TZonHeaSet | Zone air temperature heating setpoint [K] |
| input RealInput | TZonCooSet | Zone air temperature cooling setpoint [K] |
| input RealInput | TOut | Outdoor air temperature [K] |
| input RealInput | ducStaPre | Measured duct static pressure [Pa] |
| input RealInput | sumDesZonPop | Sum of the design population of the zones in the group [1] |
| input RealInput | VSumDesPopBreZon_flow | Sum of the population component design breathing zone flow rate [m3/s] |
| input RealInput | VSumDesAreBreZon_flow | Sum of the area component design breathing zone flow rate [m3/s] |
| input RealInput | uDesSysVenEff | Design system ventilation efficiency, equals to the minimum of all zones ventilation efficiency [1] |
| input RealInput | VSumUncOutAir_flow | Sum of all zones required uncorrected outdoor airflow rate [m3/s] |
| input RealInput | VSumSysPriAir_flow | System primary airflow rate, equals to the sum of the measured discharged flow rate of all terminal units [m3/s] |
| input RealInput | uOutAirFra_max | Maximum zone outdoor air fraction, equals to the maximum of primary outdoor air fraction of all zones [1] |
| input RealInput | TSup | Measured supply 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 | VOut_flow | Measured outdoor volumetric airflow rate [m3/s] |
| input RealInput | TMix | Measured mixed air temperature, used for freeze protection if use_TMix=true [K] |
| input IntegerInput | uOpeMod | AHU operation mode status signal |
| input IntegerInput | uZonTemResReq | Zone cooling supply air temperature reset request |
| input IntegerInput | uZonPreResReq | Zone static pressure reset requests |
| input IntegerInput | uFreProSta | Freeze protection status, used if use_G36FrePro=true |
| output BooleanOutput | ySupFan | Supply fan status, true if fan should be on |
| output RealOutput | ySupFanSpe | Supply fan speed [1] |
| output RealOutput | TSupSet | Setpoint for supply air temperature [K] |
| output RealOutput | VDesUncOutAir_flow | Design uncorrected minimum outdoor airflow rate [m3/s] |
| output RealOutput | yAveOutAirFraPlu | Average outdoor air flow fraction plus 1 [1] |
| output RealOutput | VEffOutAir_flow | Effective minimum outdoor airflow setpoint [m3/s] |
| output BooleanOutput | yReqOutAir | True if the AHU supply fan is on and the zone is in occupied mode |
| output RealOutput | yHea | Control signal for heating [1] |
| output RealOutput | yCoo | Control signal for cooling [1] |
| output RealOutput | yRetDamPos | Return air damper position [1] |
| output RealOutput | yOutDamPos | Outdoor air damper position [1] |
Modelica definition
block Controller
"Multizone AHU controller that composes subsequences for controlling fan speed, dampers, and supply air temperature"
parameter Real samplePeriod(
final unit="s",
final quantity="Time")=120
"Sample period of component, set to the same value to the trim and respond sequence";
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 Real delta(
final unit="s",
final quantity="Time")=5
"Time horizon over which the outdoor air flow measurment is averaged";
parameter Real delTOutHis(
final unit="K",
final displayUnit="K",
final quantity="TemperatureDifference")=1
"Delta between the temperature hysteresis high and low limit";
parameter Real delEntHis(
final unit="J/kg",
final quantity="SpecificEnergy")=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 Real TiMinOut(
final unit="s",
final quantity="Time")=120
"Time constant of controller for minimum outdoor air intake";
parameter Real TdMinOut(
final unit="s",
final quantity="Time")=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") = 0.05
"Gain for mixed air temperature tracking for freeze protection, used if use_TMix=true";
parameter Real TiFre(
final unit="s",
final quantity="Time",
final max=TiMinOut)=120
"Time constant of controller for mixed air temperature tracking for freeze protection. Require TiFre <= TiMinOut";
parameter Real TdFre(
final unit="s",
final quantity="Time")=0.1
"Time constant of derivative block for freeze protection";
parameter Real TFreSet(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")= 279.15
"Lower limit for mixed air temperature for freeze protection, used if use_TMix=true";
parameter Real retDamFulOpeTim(
final unit="s",
final quantity="Time")=180
"Time period to keep RA damper fully open before releasing it for minimum outdoor airflow control
at disable to avoid pressure fluctuations";
parameter Real disDel(
final unit="s",
final quantity="Time")=15
"Short time delay before closing the OA damper at disable to avoid pressure fluctuations";
// ----------- parameters for fan speed control -----------
parameter Real pIniSet(
final unit="Pa",
final displayUnit="Pa",
final quantity="PressureDifference")=60
"Initial pressure setpoint for fan speed control";
parameter Real pMinSet(
final unit="Pa",
final displayUnit="Pa",
final quantity="PressureDifference")=25
"Minimum pressure setpoint for fan speed control";
parameter Real pMaxSet(
final unit="Pa",
final displayUnit="Pa",
final quantity="PressureDifference")=400
"Maximum pressure setpoint for fan speed control";
parameter Real pDelTim(
final unit="s",
final quantity="Time")=600
"Delay time after which trim and respond is activated";
parameter Integer pNumIgnReq=2
"Number of ignored requests for fan speed control";
parameter Real pTriAmo(
final unit="Pa",
final displayUnit="Pa",
final quantity="PressureDifference")=-12.0
"Trim amount for fan speed control";
parameter Real pResAmo(
final unit="Pa",
final displayUnit="Pa",
final quantity="PressureDifference")=15
"Respond amount (must be opposite in to triAmo) for fan speed control";
parameter Real pMaxRes(
final unit="Pa",
final displayUnit="Pa",
final quantity="PressureDifference")=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 Real TiFanSpe(
final unit="s",
final quantity="Time")=60
"Time constant of integrator block for fan speed";
parameter Real TdFanSpe(
final unit="s",
final quantity="Time")=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 VPriSysMax_flow(
final unit="m3/s",
final quantity="VolumeFlowRate")
"Maximum expected system primary airflow at design stage";
parameter Real peaSysPop "Peak system population";
// ----------- parameters for supply air temperature control -----------
parameter Real TSupSetMin(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")=285.15
"Lowest cooling supply air temperature setpoint";
parameter Real TSupSetMax(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")=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 Real TSupSetDes(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")=286.15
"Nominal supply air temperature setpoint";
parameter Real TOutMin(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")=289.15
"Lower value of the outdoor air temperature reset range. Typically value is 16 degC (60 degF)";
parameter Real TOutMax(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")=294.15
"Higher value of the outdoor air temperature reset range. Typically value is 21 degC (70 degF)";
parameter Real iniSetSupTem(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")=TSupSetMax
"Initial setpoint for supply temperature control";
parameter Real maxSetSupTem(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")=TSupSetMax
"Maximum setpoint for supply temperature control";
parameter Real minSetSupTem(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")=TSupSetDes
"Minimum setpoint for supply temperature control";
parameter Real delTimSupTem(
final unit="s",
final quantity="Time")=600
"Delay timer for supply temperature control";
parameter Integer numIgnReqSupTem=2
"Number of ignorable requests for supply temperature control";
parameter Real triAmoSupTem(
final unit="K",
final displayUnit="K",
final quantity="TemperatureDifference")=0.1
"Trim amount for supply temperature control";
parameter Real resAmoSupTem(
final unit="K",
final displayUnit="K",
final quantity="TemperatureDifference")=-0.2
"Response amount for supply temperature control";
parameter Real maxResSupTem(
final unit="K",
final displayUnit="K",
final quantity="TemperatureDifference")=-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 Real TiTSup(
final unit="s",
final quantity="Time")=600
"Time constant of integrator block for supply air temperature control signal";
parameter Real TdTSup(
final unit="s",
final quantity="Time")=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 TZonHeaSet(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")
"Zone air temperature heating setpoint";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TZonCooSet(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")
"Zone air temperature cooling setpoint";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TOut(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature") "Outdoor air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput ducStaPre(
final unit="Pa",
final displayUnit="Pa")
"Measured duct static pressure";
Buildings.Controls.OBC.CDL.Interfaces.RealInput sumDesZonPop(
final min=0,
final unit="1")
"Sum of the design population of the zones in the group";
Buildings.Controls.OBC.CDL.Interfaces.RealInput VSumDesPopBreZon_flow(
final min=0,
final unit = "m3/s",
final quantity = "VolumeFlowRate")
"Sum of the population component design breathing zone flow rate";
Buildings.Controls.OBC.CDL.Interfaces.RealInput VSumDesAreBreZon_flow(
final min=0,
final unit = "m3/s",
final quantity = "VolumeFlowRate")
"Sum of the area component design breathing zone flow rate";
Buildings.Controls.OBC.CDL.Interfaces.RealInput uDesSysVenEff(
final min=0,
final unit = "1")
"Design system ventilation efficiency, equals to the minimum of all zones ventilation efficiency";
Buildings.Controls.OBC.CDL.Interfaces.RealInput VSumUncOutAir_flow(
final min=0,
final unit = "m3/s",
final quantity = "VolumeFlowRate")
"Sum of all zones required uncorrected outdoor airflow rate";
Buildings.Controls.OBC.CDL.Interfaces.RealInput VSumSysPriAir_flow(
final min=0,
final unit = "m3/s",
final quantity = "VolumeFlowRate")
"System primary airflow rate, equals to the sum of the measured discharged flow rate of all terminal units";
Buildings.Controls.OBC.CDL.Interfaces.RealInput uOutAirFra_max(
final min=0,
final unit = "1")
"Maximum zone outdoor air fraction, equals to the maximum of primary outdoor air fraction of all zones";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TSup(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")
"Measured supply air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TOutCut(
final unit="K",
final displayUnit="degC",
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 VOut_flow(
final min=0,
final unit = "m3/s",
final quantity = "VolumeFlowRate")
"Measured outdoor volumetric airflow rate";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TMix(
final unit="K",
final displayUnit="degC",
final quantity = "ThermodynamicTemperature") if use_TMix
"Measured mixed air temperature, used for freeze protection if use_TMix=true";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uOpeMod
"AHU operation mode status signal";
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 uFreProSta
if use_G36FrePro
"Freeze protection status, used if use_G36FrePro=true";
Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput ySupFan
"Supply fan status, true if fan should be on";
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 TSupSet(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")
"Setpoint for supply air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput VDesUncOutAir_flow(
final min=0,
final unit = "m3/s",
final quantity = "VolumeFlowRate")
"Design uncorrected minimum outdoor airflow rate";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yAveOutAirFraPlu(
final min=0,
final unit = "1")
"Average outdoor air flow fraction plus 1";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput VEffOutAir_flow(
final min=0,
final unit = "m3/s",
final quantity = "VolumeFlowRate")
"Effective minimum outdoor airflow setpoint";
Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput yReqOutAir
"True if the AHU supply fan is on and the zone is in occupied mode";
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 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.Continuous.Average TZonSetPoiAve
"Average of all zone set points";
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.SupplyFan
supFan(
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.SetPoints.OutdoorAirFlow.AHU
sysOutAirSet(final VPriSysMax_flow=VPriSysMax_flow, final peaSysPop=
peaSysPop) "Minimum outdoor airflow setpoint";
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(supTemSetPoi.TZonSetAve, TZonSetPoiAve.y);
connect(supFan.ySupFan, ySupFan);
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(supTemSetPoi.TSupSet, val.TSupSet);
connect(TZonHeaSet, TZonSetPoiAve.u1);
connect(eco.uFreProSta, uFreProSta);
connect(eco.VOut_flow_normalized, VOut_flow_normalized.y);
connect(VOut_flow_normalized.u1, VOut_flow);
connect(sysOutAirSet.VDesUncOutAir_flow, VDesUncOutAir_flow);
connect(sysOutAirSet.VDesOutAir_flow, VOut_flow_normalized.u2);
connect(sysOutAirSet.effOutAir_normalized, eco.VOutMinSet_flow_normalized);
connect(supFan.ySupFan, sysOutAirSet.uSupFan);
connect(uOpeMod, sysOutAirSet.uOpeMod);
connect(sysOutAirSet.yAveOutAirFraPlu, yAveOutAirFraPlu);
connect(sysOutAirSet.VEffOutAir_flow, VEffOutAir_flow);
connect(sysOutAirSet.yReqOutAir, yReqOutAir);
connect(sysOutAirSet.sumDesZonPop, sumDesZonPop);
connect(sysOutAirSet.VSumDesPopBreZon_flow, VSumDesPopBreZon_flow);
connect(sysOutAirSet.VSumDesAreBreZon_flow, VSumDesAreBreZon_flow);
connect(sysOutAirSet.uDesSysVenEff, uDesSysVenEff);
connect(sysOutAirSet.VSumUncOutAir_flow, VSumUncOutAir_flow);
connect(sysOutAirSet.VSumSysPriAir_flow, VSumSysPriAir_flow);
connect(uOutAirFra_max, sysOutAirSet.uOutAirFra_max);
end Controller;