Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits
Control sequences for terminal units
Information
This package contains control sequences for terminal units.
Extends from Modelica.Icons.Package (Icon for standard packages).
Package Content
| Name | Description |
|---|---|
 Controller
|
Controller for room VAV box |
 ModeAndSetPoints
|
Output zone setpoint with operation mode selection |
 Reheat
|
Sequences for VAV reheat terminal unit |
| SetPoints
|
Generic sequences of generating setpoints for terminal units control |
 Validation
|
Collection of validation models |
Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Controller
Controller for room VAV box
Information
Controller for terminal box of VAV system with reheat according to ASHRAE
Guideline 36, Part 5.E. It outputs damper position yDam,
hot water valve position yVal, AHU cooling supply temperature
setpoint reset request yZonTemResReq, and static pressure setpoint
reset request yZonPreResReq.
The sequence consists of four subsequences.
a. Heating and cooling control loop
The subsequence is implementd according to Part 5.B.5. The measured zone
temperature TRoo, zone setpoints temperatures TRooHeaSet and
TRooCooSet are inputs to the block to generate the control loop signal
yHea and yCoo. See
Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.Valves.HeatingAndCooling.
b. Active airflow setpoint calculation
This sequence sets the active maximum and minimum airflow according to
Part 5.E.3-5. Depending on operation modes uOpeMod, it sets the
airflow rate limits for cooling and heating supply. See
Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Reheat.SetPoints.ActiveAirFlow.
c. Damper and valve control
This sequence sets the damper and valve position for VAV reheat terminal unit.
The implementation is according to Part 5.E.6. According to heating and cooling
control loop signal, it calculates the discharge air temperature setpoint
TDisSet. Along with the defined maximum and minimum airflow, measured
zone temperature, the sequence outputs yDam, yVal,
TDisSet and discharge airflow rate setpoint VDisSet.
See
Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Reheat.DamperValves.
d. System reset requests generation
According to Part 5.E.9, this sequence outputs the system reset requests, i.e.
cooling supply air temperature reset requests yZonTemResReq,
static pressure reset requests yZonPreResReq, hot water reset
requests yHeaValResReq, and the boiler plant reset requests
yHeaPlaReq. See
Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Reheat.SystemRequests.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Time | samplePeriod | Sample period of component, set to the same value as the trim and respond that process yPreSetReq [s] | |
| VolumeFlowRate | V_flow_nominal | Volume flow rate of this thermal zone [m3/s] | |
| Area | AFlo | Area of the zone [m2] | |
| Cooling loop signal | |||
| SimpleController | controllerTypeCoo | Buildings.Controls.OBC.CDL.T... | Type of controller |
| Real | kCoo | 0.1 | Gain for cooling control loop signal [1/K] |
| Time | TiCoo | 900 | Time constant of integrator block for cooling control loop signal [s] |
| Time | TdCoo | 0.1 | Time constant of derivative block for cooling control loop signal [s] |
| Heating loop signal | |||
| SimpleController | controllerTypeHea | Buildings.Controls.OBC.CDL.T... | Type of controller |
| Real | kHea | 0.1 | Gain for heating control loop signal [1/K] |
| Time | TiHea | 900 | Time constant of integrator block for heating control loop signal [s] |
| Time | TdHea | 0.1 | Time constant of derivative block for heating control loop signal [s] |
| Valve | |||
| SimpleController | controllerTypeVal | Buildings.Controls.OBC.CDL.T... | Type of controller |
| Real | kVal | 0.5 | Gain of controller for valve control |
| Time | TiVal | 300 | Time constant of integrator block for valve control [s] |
| Time | TdVal | 0.1 | Time constant of derivative block for valve control [s] |
| Damper | |||
| SimpleController | controllerTypeDam | Buildings.Controls.OBC.CDL.T... | Type of controller |
| Real | kDam | 0.5 | Gain of controller for damper control [1] |
| Time | TiDam | 300 | Time constant of integrator block for damper control [s] |
| Time | TdDam | 0.1 | Time constant of derivative block for damper control [s] |
| Airflow setpoint | |||
| Zone sensors | |||
| Boolean | have_occSen | false | Set to true if the zone has occupancy sensor |
| Boolean | have_winSen | false | Set to true if the zone has window status sensor |
| Boolean | have_CO2Sen | false | Set to true if the zone has CO2 sensor |
| Nominal conditions | |||
| VolumeFlowRate | VCooMax | V_flow_nominal | Zone maximum cooling airflow setpoint [m3/s] |
| VolumeFlowRate | VMin | 0.15*V_flow_nominal | Zone minimum airflow setpoint [m3/s] |
| VolumeFlowRate | VHeaMax | V_flow_nominal | Zone maximum heating airflow setpoint [m3/s] |
| VolumeFlowRate | VMinCon | 0.1*V_flow_nominal | VAV box controllable minimum [m3/s] |
| Real | outAirPerAre | 3e-4 | Outdoor air rate per unit area [m3/(s.m2)] |
| VolumeFlowRate | outAirPerPer | 2.5e-3 | Outdoor air rate per person [m3/s] |
| Real | CO2Set | 894 | CO2 setpoint in ppm |
| Damper and valve | |||
| Parameters | |||
| TemperatureDifference | dTDisMax | 11 | Zone maximum discharge air temperature above heating setpoint [K] |
| Temperature | TDisMin | 283.15 | Lowest discharge air temperature [K] |
| System requests | |||
| Parameters | |||
| Boolean | have_heaWatCoi | true | Flag, true if there is a hot water coil |
| Boolean | have_heaPla | false | Flag, true if there is a boiler plant |
| TemperatureDifference | cooSetDif_1 | 2.8 | Limit value of difference between zone temperature and cooling setpoint for generating 3 cooling SAT reset requests [K] |
| TemperatureDifference | cooSetDif_2 | 1.7 | Limit value of difference between zone temperature and cooling setpoint for generating 2 cooling SAT reset requests [K] |
| TemperatureDifference | disAirSetDif_1 | 17 | Limit value of difference between discharge air temperature and its setpoint for generating 3 hot water reset requests [K] |
| TemperatureDifference | disAirSetDif_2 | 8.3 | Limit value of difference between discharge air temperature and its setpoint for generating 2 hot water reset requests [K] |
| Duration times | |||
| Time | durTimTem | 120 | Duration time of zone temperature exceeds setpoint [s] |
| Time | durTimFlo | 60 | Duration time of airflow rate less than setpoint [s] |
| Time | durTimDisAir | 300 | Duration time of discharge air temperature is less than setpoint [s] |
Connectors
| Type | Name | Description |
|---|---|---|
| input RealInput | TRooHeaSet | Setpoint temperature for room for heating [K] |
| input RealInput | TRooCooSet | Setpoint temperature for room for cooling [K] |
| input RealInput | TRoo | Measured room temperature [K] |
| input RealInput | TDis | Measured supply air temperature after heating coil [K] |
| input RealInput | VDis | Measured discharge airflow rate [m3/s] |
| input RealInput | TSupAHU | AHU supply air temperature [K] |
| input RealInput | ppmCO2 | Measured CO2 concentration |
| input RealInput | nOcc | Number of occupants |
| input BooleanInput | uWin | Window status, true if open, false if closed |
| input IntegerInput | uOpeMod | Zone operation mode |
| output RealOutput | yVal | Signal for heating coil valve [1] |
| output RealOutput | yDam | Signal for VAV damper [1] |
| output IntegerOutput | yZonTemResReq | Zone cooling supply air temperature reset request |
| output IntegerOutput | yZonPreResReq | Zone static pressure reset requests |
Modelica definition
block Controller "Controller for room VAV box"
parameter Modelica.SIunits.Time samplePeriod
"Sample period of component, set to the same value as the trim and respond that process yPreSetReq";
parameter Modelica.SIunits.VolumeFlowRate V_flow_nominal
"Volume flow rate of this thermal zone";
parameter Modelica.SIunits.Area AFlo "Area of the zone";
parameter Buildings.Controls.OBC.CDL.Types.SimpleController controllerTypeCoo
=Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Type of controller";
parameter Real kCoo(final unit="1/K") = 0.1
"Gain for cooling control loop signal";
parameter Modelica.SIunits.Time TiCoo=900
"Time constant of integrator block for cooling control loop signal";
parameter Modelica.SIunits.Time TdCoo=0.1
"Time constant of derivative block for cooling control loop signal";
parameter Buildings.Controls.OBC.CDL.Types.SimpleController controllerTypeHea
=Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Type of controller";
parameter Real kHea(final unit="1/K") = 0.1
"Gain for heating control loop signal";
parameter Modelica.SIunits.Time TiHea=900
"Time constant of integrator block for heating control loop signal";
parameter Modelica.SIunits.Time TdHea=0.1
"Time constant of derivative block for heating control loop signal";
parameter Buildings.Controls.OBC.CDL.Types.SimpleController controllerTypeVal
=Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Type of controller";
parameter Real kVal=0.5 "Gain of controller for valve control";
parameter Modelica.SIunits.Time TiVal=300
"Time constant of integrator block for valve control";
parameter Modelica.SIunits.Time TdVal=0.1
"Time constant of derivative block for valve control";
parameter Buildings.Controls.OBC.CDL.Types.SimpleController controllerTypeDam
=Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Type of controller";
parameter Real kDam(final unit="1") = 0.5
"Gain of controller for damper control";
parameter Modelica.SIunits.Time TiDam=300
"Time constant of integrator block for damper control";
parameter Modelica.SIunits.Time TdDam=0.1
"Time constant of derivative block for damper control";
parameter Boolean have_occSen=false
"Set to true if the zone has occupancy sensor";
parameter Boolean have_winSen=false
"Set to true if the zone has window status sensor";
parameter Boolean have_CO2Sen=false "Set to true if the zone has CO2 sensor";
parameter Modelica.SIunits.VolumeFlowRate VCooMax=V_flow_nominal
"Zone maximum cooling airflow setpoint";
parameter Modelica.SIunits.VolumeFlowRate VMin=0.15*V_flow_nominal
"Zone minimum airflow setpoint";
parameter Modelica.SIunits.VolumeFlowRate VHeaMax=V_flow_nominal
"Zone maximum heating airflow setpoint";
parameter Modelica.SIunits.VolumeFlowRate VMinCon=0.1*V_flow_nominal
"VAV box controllable minimum";
parameter Real outAirPerAre(final unit="m3/(s.m2)") = 3e-4
"Outdoor air rate per unit area";
parameter Modelica.SIunits.VolumeFlowRate outAirPerPer=2.5e-3
"Outdoor air rate per person";
parameter Real CO2Set=894 "CO2 setpoint in ppm";
parameter Modelica.SIunits.TemperatureDifference dTDisMax=11
"Zone maximum discharge air temperature above heating setpoint";
parameter Modelica.SIunits.Temperature TDisMin=283.15
"Lowest discharge air temperature";
parameter Boolean have_heaWatCoi=true
"Flag, true if there is a hot water coil";
parameter Boolean have_heaPla=false "Flag, true if there is a boiler plant";
parameter Modelica.SIunits.TemperatureDifference cooSetDif_1=2.8 "Limit value of difference between zone temperature and cooling setpoint
for generating 3 cooling SAT reset requests";
parameter Modelica.SIunits.TemperatureDifference cooSetDif_2=1.7 "Limit value of difference between zone temperature and cooling setpoint
for generating 2 cooling SAT reset requests";
parameter Modelica.SIunits.TemperatureDifference disAirSetDif_1=17 "Limit value of difference between discharge air temperature and its setpoint
for generating 3 hot water reset requests";
parameter Modelica.SIunits.TemperatureDifference disAirSetDif_2=8.3 "Limit value of difference between discharge air temperature and its setpoint
for generating 2 hot water reset requests";
parameter Modelica.SIunits.Time durTimTem=120
"Duration time of zone temperature exceeds setpoint";
parameter Modelica.SIunits.Time durTimFlo=60
"Duration time of airflow rate less than setpoint";
parameter Modelica.SIunits.Time durTimDisAir=300
"Duration time of discharge air temperature is less than setpoint";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TRooHeaSet(
final quantity="ThermodynamicTemperature",
final unit="K",
displayUnit="degC",
min=0) "Setpoint temperature for room for heating";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TRooCooSet(
final quantity="ThermodynamicTemperature",
final unit="K",
displayUnit="degC",
min=0) "Setpoint temperature for room for cooling";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TRoo(
final quantity="ThermodynamicTemperature",
final unit="K",
displayUnit="degC",
min=0) "Measured room temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TDis(
final quantity="ThermodynamicTemperature",
final unit="K",
displayUnit="degC",
min=0) "Measured supply air temperature after heating coil";
Buildings.Controls.OBC.CDL.Interfaces.RealInput VDis(final unit="m3/s",
quantity="VolumeFlowRate") "Measured discharge airflow rate";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TSupAHU(
final quantity="ThermodynamicTemperature",
final unit="K",
displayUnit="degC",
min=0) "AHU supply air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput ppmCO2 if have_CO2Sen
"Measured CO2 concentration";
Buildings.Controls.OBC.CDL.Interfaces.RealInput nOcc if have_occSen
"Number of occupants";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uWin if have_winSen
"Window status, true if open, false if closed";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uOpeMod
"Zone operation mode";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yVal(
min=0,
max=1,
final unit="1") "Signal for heating coil valve";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput yDam(
min=0,
max=1,
final unit="1") "Signal for VAV damper";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yZonTemResReq
"Zone cooling supply air temperature reset request";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yZonPreResReq
"Zone static pressure reset requests";
Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Reheat.SetPoints.ActiveAirFlow
actAirSet(
final AFlo=AFlo,
final have_occSen=have_occSen,
final have_winSen=have_winSen,
final have_CO2Sen=have_CO2Sen,
final VCooMax=VCooMax,
final VMin=VMin,
final VHeaMax=VHeaMax,
final VMinCon=VMinCon,
final outAirPerAre=outAirPerAre,
final outAirPerPer=outAirPerPer,
final CO2Set=CO2Set) "Active airflow rate setpoint";
Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Reheat.DamperValves
damVal(
final controllerTypeVal=controllerTypeVal,
final kVal=kVal,
final TiVal=TiVal,
final TdVal=TdVal,
final controllerTypeDam=controllerTypeDam,
final kDam=kDam,
final TiDam=TiDam,
final TdDam=TdDam,
final dTDisMax=dTDisMax,
final TDisMin=TDisMin,
V_flow_nominal=max(VCooMax, VHeaMax)) "Damper and valve controller";
Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.Reheat.SystemRequests
sysReq(
final samplePeriod=samplePeriod,
final have_heaWatCoi=have_heaWatCoi,
final have_heaPla=have_heaPla,
final cooSetDif_1=cooSetDif_1,
final cooSetDif_2=cooSetDif_2,
final disAirSetDif_1=disAirSetDif_1,
final disAirSetDif_2=disAirSetDif_2,
final durTimTem=durTimTem,
final durTimFlo=durTimFlo,
final durTimDisAir=durTimDisAir) "Number of system requests";
Buildings.Controls.OBC.CDL.Continuous.LimPID conHeaLoo(
final controllerType=controllerTypeHea,
final k=kHea,
final Ti=TiHea,
final Td=TdHea,
final yMax=1,
final yMin=0,
reset=Buildings.Controls.OBC.CDL.Types.Reset.Parameter)
"Heating loop signal";
Buildings.Controls.OBC.CDL.Continuous.LimPID conCooLoo(
final controllerType=controllerTypeCoo,
final k=kCoo,
final Ti=TiCoo,
final Td=TdCoo,
final yMax=1,
final yMin=0,
reverseAction=true,
reset=Buildings.Controls.OBC.CDL.Types.Reset.Parameter)
"Cooling loop signal";
protected
CDL.Integers.Equal isUnOcc "Output true if unoccupied";
CDL.Integers.Sources.Constant conIntUn(final k=Buildings.Controls.OBC.ASHRAE.G36_PR1.Types.OperationModes.unoccupied)
"Constant signal for unoccupied mode";
CDL.Logical.Not isNotUn "Output true if not unoccupied";
equation
connect(sysReq.TCooSet, TRooCooSet);
connect(sysReq.TRoo, TRoo);
connect(sysReq.VDisSet, damVal.VDisSet);
connect(sysReq.VDis, VDis);
connect(sysReq.TDisSet, damVal.TDisSet);
connect(damVal.yDam, yDam);
connect(damVal.yHeaVal, yVal);
connect(damVal.VDis, VDis);
connect(damVal.TDis, TDis);
connect(sysReq.TDis, TDis);
connect(sysReq.uDam, damVal.yDam);
connect(damVal.yHeaVal, sysReq.uHeaVal);
connect(TRoo, damVal.TRoo);
connect(damVal.TSup, TSupAHU);
connect(actAirSet.VActCooMax, damVal.VActCooMax);
connect(actAirSet.VActCooMin, damVal.VActCooMin);
connect(actAirSet.VActMin, damVal.VActMin);
connect(actAirSet.VActHeaMin, damVal.VActHeaMin);
connect(actAirSet.VActHeaMax, damVal.VActHeaMax);
connect(damVal.THeaSet, TRooHeaSet);
connect(actAirSet.VActCooMax, damVal.VActCooMax);
connect(actAirSet.VActCooMin, damVal.VActCooMin);
connect(actAirSet.VActMin, damVal.VActMin);
connect(actAirSet.VActHeaMin, damVal.VActHeaMin);
connect(actAirSet.VActHeaMax, damVal.VActHeaMax);
connect(actAirSet.uOpeMod, uOpeMod);
connect(sysReq.yZonTemResReq, yZonTemResReq);
connect(sysReq.yZonPreResReq, yZonPreResReq);
connect(actAirSet.ppmCO2, ppmCO2);
connect(actAirSet.nOcc, nOcc);
connect(actAirSet.uWin, uWin);
connect(TRooHeaSet, conHeaLoo.u_s);
connect(TRooCooSet, conCooLoo.u_s);
connect(TRoo, conHeaLoo.u_m);
connect(TRoo, conCooLoo.u_m);
connect(conCooLoo.y, damVal.uCoo);
connect(conHeaLoo.y, damVal.uHea);
connect(conCooLoo.y, sysReq.uCoo);
connect(damVal.uOpeMod, uOpeMod);
connect(conIntUn.y, isUnOcc.u1);
connect(uOpeMod, isUnOcc.u2);
connect(isUnOcc.y, isNotUn.u);
connect(isNotUn.y, conCooLoo.trigger);
connect(isNotUn.y, conHeaLoo.trigger);
end Controller;
Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.ModeAndSetPoints
Output zone setpoint with operation mode selection
Information
Block outputs zone setpoint temperature (TCooSet, THeaSet)
and system operation mode (yOpeMod). When operation mode is in freeze
protection setback mode, it also outputs a level 3 freeze protection alarm
yFreProSta. The sequences are implemented according to ASHRAE
Guideline 36, Part 5.B.3 and 5.C.6.
The sequence consists of two subsequences.
a. Operation mode selector
The subsequence outputs 7 types system operation mode (occupied, warmup,
cool-down, setback, freeze protection setback, setup, unoccupied) according
to current time, the time to next occupied hours tNexOcc,
current zone temperature TZon. See
Buildings.Controls.OBC.ASHRAE.G36_PR1.Generic.SetPoints.OperationMode.
b. Zone setpoint temperature reset
This sequence is implemented according to Part 5.B.3. It sets zone setpoint according to the global giving setpoint, local setpoint adjustments, demand limits adjustment, window status and occupancy stataus. See Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.SetPoints.ZoneTemperatures.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | numZon | Total number of served VAV boxes | |
| Temperature | THeaOn | 293.15 | Heating setpoint during on [K] |
| Temperature | THeaOff | 285.15 | Heating setpoint during off [K] |
| Temperature | TCooOn | 297.15 | Cooling setpoint during on [K] |
| Temperature | TCooOff | 303.15 | Cooling setpoint during off [K] |
| Operation mode | |||
| Parameters | |||
| Time | preWarCooTim | 10800 | Maximum cool-down/warm-up time [s] |
| TemperatureDifference | bouLim | 1.1 | Value limit to indicate the end of setback/setup mode [K] |
| Temperature | freProThrVal | 277.55 | Threshold zone temperature value to activate freeze protection mode [K] |
| Temperature | freProEndVal | 280.35 | Threshold zone temperature value to finish the freeze protection mode [K] |
| Test setting | |||
| Time | warCooTim | 1800 | Defined cool-down/warm-up time [s] |
| Setpoint adjust | |||
| Sensors | |||
| Boolean | have_occSen | false | Check if the zone has occupancy sensor |
| Boolean | have_winSen | false | Check if the zone has window status sensor |
| Adjustable settings | |||
| Boolean | cooAdj | false | Flag, set to true if both cooling and heating setpoint are adjustable separately |
| Boolean | heaAdj | false | Flag, set to true if heating setpoint is adjustable |
| Boolean | sinAdj | false | Flag, set to true if both cooling and heating setpoint are adjustable through a single common knob |
| Boolean | ignDemLim | true | Flag, set to true to exempt individual zone from demand limit setpoint adjustment |
| Limits | |||
| Temperature | TCooOnMax | 300.15 | Maximum cooling setpoint during on [K] |
| Temperature | TCooOnMin | 295.15 | Minimum cooling setpoint during on [K] |
| Temperature | THeaOnMax | 295.15 | Maximum heating setpoint during on [K] |
| Temperature | THeaOnMin | 291.15 | Minimum heating setpoint during on [K] |
| Temperature | TCooWinOpe | 322.15 | Cooling setpoint when window is open [K] |
| Temperature | THeaWinOpe | 277.15 | Heating setpoint when window is open [K] |
| Demands settings | |||
| TemperatureDifference | incSetDem_1 | 0.56 | Cooling setpoint increase value when cooling demand limit level 1 is imposed [K] |
| TemperatureDifference | incSetDem_2 | 1.1 | Cooling setpoint increase value when cooling demand limit level 2 is imposed [K] |
| TemperatureDifference | incSetDem_3 | 2.2 | Cooling setpoint increase value when cooling demand limit level 3 is imposed [K] |
| TemperatureDifference | decSetDem_1 | 0.56 | Heating setpoint decrease value when heating demand limit level 1 is imposed [K] |
| TemperatureDifference | decSetDem_2 | 1.1 | Heating setpoint decrease value when heating demand limit level 2 is imposed [K] |
| TemperatureDifference | decSetDem_3 | 2.2 | Heating setpoint decrease value when heating demand limit level 3 is imposed [K] |
| Integer | cooDemLimLevCon | Buildings.Controls.OBC.ASHRA... | Cooling demand limit level |
| Integer | heaDemLimLevCon | Buildings.Controls.OBC.ASHRA... | Heating demand limit level |
| Boolean | winStaCon | false | Window status, set to true if window is open |
Connectors
| Type | Name | Description |
|---|---|---|
| input RealInput | TZon[numZon] | Measured zone temperatures [K] |
| input RealInput | tNexOcc | Time to next occupied period [s] |
| input RealInput | setAdj[numZon] | Setpoint adjustment value [K] |
| input RealInput | heaSetAdj[numZon] | Heating setpoint adjustment value [K] |
| input BooleanInput | uOcc | Current occupancy period, true if it is in occupant period |
| input BooleanInput | uOccSen[numZon] | Occupancy sensor (occupied=true, unoccupied=false) |
| input BooleanInput | uWinSta[numZon] | Window status (open=true, close=false) |
| output RealOutput | TCooSet[numZon] | Cooling setpoint temperature [K] |
| output RealOutput | THeaSet[numZon] | Heating setpoint temperature [K] |
| output IntegerOutput | yOpeMod | Operation mode |
Modelica definition
block ModeAndSetPoints
"Output zone setpoint with operation mode selection"
parameter Integer numZon(min=2) "Total number of served VAV boxes";
parameter Modelica.SIunits.Temperature THeaOn=293.15
"Heating setpoint during on";
parameter Modelica.SIunits.Temperature THeaOff=285.15
"Heating setpoint during off";
parameter Modelica.SIunits.Temperature TCooOn=297.15
"Cooling setpoint during on";
parameter Modelica.SIunits.Temperature TCooOff=303.15
"Cooling setpoint during off";
parameter Modelica.SIunits.Time preWarCooTim=10800
"Maximum cool-down/warm-up time";
parameter Modelica.SIunits.TemperatureDifference bouLim=1.1
"Value limit to indicate the end of setback/setup mode";
parameter Modelica.SIunits.Temperature freProThrVal=277.55
"Threshold zone temperature value to activate freeze protection mode";
parameter Modelica.SIunits.Temperature freProEndVal=280.35
"Threshold zone temperature value to finish the freeze protection mode";
parameter Modelica.SIunits.Time warCooTim=1800
"Defined cool-down/warm-up time";
parameter Boolean have_occSen=false "Check if the zone has occupancy sensor";
parameter Boolean have_winSen=false
"Check if the zone has window status sensor";
parameter Boolean cooAdj=false
"Flag, set to true if both cooling and heating setpoint are adjustable separately";
parameter Boolean heaAdj=false
"Flag, set to true if heating setpoint is adjustable";
parameter Boolean sinAdj=false
"Flag, set to true if both cooling and heating setpoint are adjustable through a single common knob";
parameter Boolean ignDemLim=true
"Flag, set to true to exempt individual zone from demand limit setpoint adjustment";
parameter Modelica.SIunits.Temperature TCooOnMax=300.15
"Maximum cooling setpoint during on";
parameter Modelica.SIunits.Temperature TCooOnMin=295.15
"Minimum cooling setpoint during on";
parameter Modelica.SIunits.Temperature THeaOnMax=295.15
"Maximum heating setpoint during on";
parameter Modelica.SIunits.Temperature THeaOnMin=291.15
"Minimum heating setpoint during on";
parameter Modelica.SIunits.Temperature TCooWinOpe=322.15
"Cooling setpoint when window is open";
parameter Modelica.SIunits.Temperature THeaWinOpe=277.15
"Heating setpoint when window is open";
parameter Modelica.SIunits.TemperatureDifference incSetDem_1=0.56
"Cooling setpoint increase value when cooling demand limit level 1 is imposed";
parameter Modelica.SIunits.TemperatureDifference incSetDem_2=1.1
"Cooling setpoint increase value when cooling demand limit level 2 is imposed";
parameter Modelica.SIunits.TemperatureDifference incSetDem_3=2.2
"Cooling setpoint increase value when cooling demand limit level 3 is imposed";
parameter Modelica.SIunits.TemperatureDifference decSetDem_1=0.56
"Heating setpoint decrease value when heating demand limit level 1 is imposed";
parameter Modelica.SIunits.TemperatureDifference decSetDem_2=1.1
"Heating setpoint decrease value when heating demand limit level 2 is imposed";
parameter Modelica.SIunits.TemperatureDifference decSetDem_3=2.2
"Heating setpoint decrease value when heating demand limit level 3 is imposed";
parameter Integer cooDemLimLevCon=Buildings.Controls.OBC.ASHRAE.G36_PR1.Types.DemandLimitLevels.cooling0
"Cooling demand limit level";
parameter Integer heaDemLimLevCon=Buildings.Controls.OBC.ASHRAE.G36_PR1.Types.DemandLimitLevels.heating0
"Heating demand limit level";
parameter Boolean winStaCon=false
"Window status, set to true if window is open";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TZon[numZon](each final unit="K",
each quantity="ThermodynamicTemperature") "Measured zone temperatures";
Buildings.Controls.OBC.CDL.Interfaces.RealInput tNexOcc(final unit="s",
quantity="Time") "Time to next occupied period";
Buildings.Controls.OBC.CDL.Interfaces.RealInput setAdj[numZon](each final
unit="K", each quantity="ThermodynamicTemperature") if (cooAdj or sinAdj)
"Setpoint adjustment value";
Buildings.Controls.OBC.CDL.Interfaces.RealInput heaSetAdj[numZon](each final
unit="K", each quantity="ThermodynamicTemperature") if heaAdj
"Heating setpoint adjustment value";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uOcc
"Current occupancy period, true if it is in occupant period";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uOccSen[numZon] if
have_occSen "Occupancy sensor (occupied=true, unoccupied=false)";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uWinSta[numZon] if
have_winSen "Window status (open=true, close=false)";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput TCooSet[numZon](each final
unit="K", each quantity="ThermodynamicTemperature")
"Cooling setpoint temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput THeaSet[numZon](each final
unit="K", each quantity="ThermodynamicTemperature")
"Heating setpoint temperature";
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yOpeMod "Operation mode";
Buildings.Controls.OBC.ASHRAE.G36_PR1.TerminalUnits.SetPoints.ZoneTemperatures
TSetZon[numZon](
each final have_occSen=have_occSen,
each final have_winSen=have_winSen,
each final cooAdj=cooAdj,
each final heaAdj=heaAdj,
each final sinAdj=sinAdj,
each final ignDemLim=ignDemLim,
each final TCooOnMax=TCooOnMax,
each final TCooOnMin=TCooOnMin,
each final THeaOnMax=THeaOnMax,
each final THeaOnMin=THeaOnMin,
each final TCooWinOpe=TCooWinOpe,
each final THeaWinOpe=THeaWinOpe,
each final incSetDem_1=incSetDem_1,
each final incSetDem_2=incSetDem_2,
each final incSetDem_3=incSetDem_3,
each final decSetDem_1=decSetDem_1,
each final decSetDem_2=decSetDem_2,
each final decSetDem_3=decSetDem_3) "Zone set point temperature";
Buildings.Controls.OBC.CDL.Integers.Sources.Constant cooDemLimLev[numZon](
each k=cooDemLimLevCon) "Cooling demand limit level";
Buildings.Controls.OBC.CDL.Integers.Sources.Constant heaDemLimLev[numZon](
each k=heaDemLimLevCon) "Heating demand limit level";
Buildings.Controls.OBC.CDL.Continuous.Sources.Constant TSetRooHeaOn(final k=
THeaOn) "Heating on setpoint";
Buildings.Controls.OBC.CDL.Continuous.Sources.Constant TSetRooHeaOff(final k=
THeaOff) "Heating off set point";
Buildings.Controls.OBC.CDL.Continuous.Sources.Constant TSetRooCooOn(final k=
TCooOn) "Cooling on setpoint";
Buildings.Controls.OBC.CDL.Continuous.Sources.Constant TSetRooCooOff(final k=
TCooOff) "Cooling off set point";
Buildings.Controls.OBC.ASHRAE.G36_PR1.Generic.SetPoints.OperationMode
opeModSel(
final numZon=numZon,
final preWarCooTim=preWarCooTim,
final bouLim=bouLim,
final freProThrVal=freProThrVal,
final freProEndVal=freProEndVal) "Operation mode selector";
Buildings.Controls.OBC.CDL.Continuous.Sources.Constant tCooDowHeaUp[numZon](
each final k=warCooTim)
"Cool down and heat up time (assumed as constant)";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant cloWin[numZon](each k=false)
if not have_winSen "Closed window status";
protected
Buildings.Controls.OBC.CDL.Routing.RealReplicator reaRep(nout=numZon)
"Duplicate input to multiple outputs";
Buildings.Controls.OBC.CDL.Routing.RealReplicator reaRep1(nout=numZon)
"Duplicate input to multiple outputs";
Buildings.Controls.OBC.CDL.Routing.RealReplicator reaRep2(nout=numZon)
"Duplicate input to multiple outputs";
Buildings.Controls.OBC.CDL.Routing.RealReplicator reaRep3(nout=numZon)
"Duplicate input to multiple outputs";
Buildings.Controls.OBC.CDL.Routing.IntegerReplicator intRep(nout=numZon);
equation
connect(TSetZon.uCooDemLimLev, cooDemLimLev.y);
connect(heaDemLimLev.y, TSetZon.uHeaDemLimLev);
connect(tCooDowHeaUp.y, opeModSel.cooDowTim);
connect(tCooDowHeaUp.y, opeModSel.warUpTim);
connect(TSetRooCooOn.y, opeModSel.TCooSet);
connect(opeModSel.THeaSet, TSetRooHeaOn.y);
connect(opeModSel.TUnoHeaSet, TSetRooHeaOff.y);
connect(opeModSel.TUnoCooSet, TSetRooCooOff.y);
connect(TSetZon.TCooSet, TCooSet);
connect(TSetZon.THeaSet, THeaSet);
connect(opeModSel.yOpeMod, yOpeMod);
connect(opeModSel.TZon, TZon);
connect(setAdj, TSetZon.setAdj);
connect(heaSetAdj, TSetZon.heaSetAdj);
connect(TSetZon.uOccSen, uOccSen);
connect(TSetZon.uWinSta, uWinSta);
connect(uWinSta, opeModSel.uWinSta);
connect(cloWin.y, opeModSel.uWinSta);
connect(TSetRooCooOn.y, reaRep.u);
connect(reaRep.y, TSetZon.occCooSet);
connect(TSetRooHeaOn.y, reaRep1.u);
connect(reaRep1.y, TSetZon.occHeaSet);
connect(TSetRooHeaOff.y, reaRep2.u);
connect(reaRep2.y, TSetZon.unoHeaSet);
connect(TSetRooCooOff.y, reaRep3.u);
connect(reaRep3.y, TSetZon.unoCooSet);
connect(opeModSel.yOpeMod, intRep.u);
connect(intRep.y, TSetZon.uOpeMod);
connect(uOcc, opeModSel.uOcc);
connect(tNexOcc, opeModSel.tNexOcc);
end ModeAndSetPoints;