Buildings.Controls.OBC.ASHRAE.G36.Generic
Generic control sequences
Information
This package contains generic sequences that would be needed for both AHU and terminal units control.
Package Content
| Name | Description |
|---|---|
 AirEconomizerHighLimits
|
Specify the economizer high liimits |
 TimeSuppression
|
Calculate a time-delay period after change in set point |
 TrimAndRespond
|
Block to inplement trim and respond logic |
 Validation
|
Collection of validation models |
Buildings.Controls.OBC.ASHRAE.G36.Generic.AirEconomizerHighLimits
Specify the economizer high liimits
Information
This block outputs the air economizer high limits according to the energy standard, device type and climate zone. The implementation is according to the Section 5.1.17 of ASHRAE Guideline 36, May 2020.
When ASHRAE 90.1-2016 is used.
| Device type | Allowed only in these ASHRAE Climate Zones | Required High Limit (Economizer OFF when) |
|---|---|---|
| Fixed dry bulb | 1b, 2b, 3b, 3c, 4b, 4c, 5b, 5c, 6b, 7, 8 | outdoor air temperature is higher than 24 °C (TCut=24°C) |
| 5a, 6a | outdoor air temperature is higher than 21 °C (TCut=21°C) |
|
| 1a, 2a, 3a, 4a | outdoor air temperature is higher than 18 °C (TCut=18°C) |
|
| Differential dry bulb | 1b, 2b, 3b, 3c, 4b, 4c, 5a, 5b, 5c, 6a, 6b, 7, 8 | outdoor air temperature is higher than the return air temperature (TCut=TRet) |
| Fixed enthalpy with fixed dry bulb | All | outdoor air temperature is higher than 24 °C or the enthalpy is higher than 66 kJ/kg (TCut=24°C or hCut=66kJ/kg) |
| Differential enthalpy with fixed dry bulb | All | outdoor air temperature is higher than 24 °C or the outdoor air enthalpy is higher than the return air enthalpy (TCut=24°C or hCut=hRet) |
| Fixed dry bulb with differential dry bulb | 1b, 2b, 3b, 3c, 4b, 4c, 5b, 5c, 6b, 7, 8 | outdoor air temperature is higher than 24 °C or the return air temperature (TCut=min(24°C, TRet)) |
| 5a, 6a | outdoor air temperature is higher than 21 °C or the return air temperature (TCut=min(21°C, TRet)) |
When California Title 24-2016 is used.
| Device type | California Climate Zones | Required High Limit (Economizer OFF when) |
|---|---|---|
| Fixed dry bulb | 1, 3, 5, 11 to 16 | outdoor air temperature is higher than 24 °C (TCut=24°C) |
| 2, 4, 10 | outdoor air temperature is higher than 23 °C (TCut=23°C) |
|
| 6, 8, 9 | outdoor air temperature is higher than 22 °C (TCut=22°C) |
|
| 7 | outdoor air temperature is higher than 21 °C (TCut=21°C) |
|
| Differential dry bulb | 1, 3, 5, 11 to 16 | outdoor air temperature is higher than the return air temperature (TCut=TRet) |
| 2, 4, 10 | outdoor air temperature is higher than the return air temperature minus 1 °C (TCut=TRet-1°C) |
|
| 6, 8, 9 | outdoor air temperature is higher than the return air temperature minus 2 °C (TCut=TRet-2°C) |
|
| 7 | outdoor air temperature is higher than the return air temperature minus 3 °C (TCut=TRet-3°C) |
|
| Fixed enthalpy with fixed dry bulb | All | outdoor air temperature is higher than 24 °C or the enthalpy is higher than 66 kJ/kg (TCut=24°C or hCut=66kJ/kg) |
| Fixed dry bulb with differential dry bulb | 1, 3, 5, 11 to 16 | outdoor air temperature is higher than 24 °C or the return air temperature (TCut=24°C or TCut=TRet) |
| 2, 4, 10 | outdoor air temperature is higher than 23 °C or the return air temperature minus 1 °C (TCut=min(23°C, TRet-1°C)) |
|
| 6, 8, 9 | outdoor air temperature is higher than 22 °C or the return air temperature minus 2 °C (TCut=min(22°C, TRet-2°C)) |
|
| 7 | outdoor air temperature is higher than 21 °C or the return air temperature minus 3 °C (TCut=min(21°C, TRet-3°C)) |
Note that the device type Fixed dry bulb with differential dry bulb is not listed in either ASHRAE 90.1 or Title 24 standard. But it is possible to use in practice. See Section 3.1.6.2 in Guideline 36.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| EnergyStandard | eneStd | Energy standard, ASHRAE 90.1 or Title 24 | |
| ControlEconomizer | ecoHigLimCon | Economizer high limit control device | |
| ASHRAEClimateZone | ashCliZon | Buildings.Controls.OBC.ASHRA... | ASHRAE climate zone |
| Title24ClimateZone | tit24CliZon | Buildings.Controls.OBC.ASHRA... | California Title 24 climate zone |
Connectors
| Type | Name | Description |
|---|---|---|
| input RealInput | TRet | Return air temperature [K] |
| input RealInput | hRet | Return air enthalpy. For differential enthalpy use return air enthalpy measurement [J/kg] |
| output RealOutput | TCut | Outdoor air temperature high limit cutoff [K] |
| output RealOutput | hCut | Outdoor air enthalpy high limit cutoff [J/kg] |
Modelica definition
block AirEconomizerHighLimits "Specify the economizer high liimits"
parameter Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard eneStd
"Energy standard, ASHRAE 90.1 or Title 24";
parameter Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer ecoHigLimCon
"Economizer high limit control device";
parameter Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone ashCliZon=Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Not_Specified
"ASHRAE climate zone";
parameter Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone tit24CliZon=Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Not_Specified
"California Title 24 climate zone";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TRet(
final unit="K",
displayUnit="degC",
final quantity="ThermodynamicTemperature")
if (ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.DifferentialDryBulb
or ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.FixedDryBulbWithDifferentialDryBulb)
"Return air temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput hRet(
final unit="J/kg",
final quantity="SpecificEnergy")
if (eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
and ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.DifferentialEnthalpyWithFixedDryBulb)
"Return air enthalpy. For differential enthalpy use return air enthalpy measurement";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput TCut(
final quantity="ThermodynamicTemperature",
final unit="K",
displayUnit="degC")
"Outdoor air temperature high limit cutoff";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput hCut(
final quantity="SpecificEnergy",
final unit="J/kg")
if (ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.DifferentialEnthalpyWithFixedDryBulb
or ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.FixedEnthalpyWithFixedDryBulb)
"Outdoor air enthalpy high limit cutoff";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant fixDryBul(
final k=ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.FixedDryBulb)
"Fixed dry bulb";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant difDryBul(
final k=ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.DifferentialDryBulb)
"Differential dry bulb";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant fixEntFixDryBul(
final k=ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.FixedEnthalpyWithFixedDryBulb)
"Fixed enthalpy with fixed dry bulb";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant difEntFixDryBul(
final k=ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.DifferentialEnthalpyWithFixedDryBulb)
"Differential enthalpy with fixed dry bulb";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash1A(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_1A)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 1A";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash1B(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_1B)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 1B";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash2A(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_2A)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 2A";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash2B(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_2B)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 2B";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash3A(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_3A)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 3A";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash3B(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_3B)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 3B";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash3C(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_3C)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 3C";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash4A(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_4A)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 4A";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash4B(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_4B)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 4B";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash4C(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_4C)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 4C";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash5A(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_5A)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 5A";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash5B(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_5B)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 5B";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash5C(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_5C)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 5C";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash6A(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_6A)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 6A";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash6B(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_6B)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 6B";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash7(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_7)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 7";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant ash8(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Zone_8)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"ASHRAE zone 8";
Buildings.Controls.OBC.CDL.Logical.Or3 or3
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 1b, 2b or 3b";
Buildings.Controls.OBC.CDL.Logical.Or3 or1
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 3c, 4b or 4c";
Buildings.Controls.OBC.CDL.Logical.Or3 or2
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 5b, 5c or 6b";
Buildings.Controls.OBC.CDL.Logical.Or3 or4
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical or";
Buildings.Controls.OBC.CDL.Logical.Or or6
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 7 or 8";
Buildings.Controls.OBC.CDL.Logical.Or or7
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical or";
Buildings.Controls.OBC.CDL.Logical.Or or5
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 5a or 6a";
Buildings.Controls.OBC.CDL.Logical.And and2
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical and";
Buildings.Controls.OBC.CDL.Logical.And and1
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical and";
Buildings.Controls.OBC.CDL.Logical.And and3
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Switch swi
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con(
final k=273.15 + 24)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off temperature";
Buildings.Controls.OBC.CDL.Reals.Switch swi1
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con1(
final k=273.15 + 21)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off temperature";
Buildings.Controls.OBC.CDL.Reals.Switch swi2
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con2(
final k=273.15 + 18)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off temperature";
Buildings.Controls.OBC.CDL.Logical.Or3 or10
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 1b, 2b or 3b";
Buildings.Controls.OBC.CDL.Logical.Or3 or11
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 3c, 4b or 4c";
Buildings.Controls.OBC.CDL.Logical.Or3 or12
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 5a, 5b or 5c";
Buildings.Controls.OBC.CDL.Logical.Or3 or13
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 6a, 6b or 7";
Buildings.Controls.OBC.CDL.Logical.Or3 or14
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical or";
Buildings.Controls.OBC.CDL.Logical.Or3 or15
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical or";
Buildings.Controls.OBC.CDL.Reals.Switch swi3
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Logical.Or3 or8
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 1a, 2a or 3a";
Buildings.Controls.OBC.CDL.Logical.Or or9
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Zone 1a, 2a, 3a or 4a";
Buildings.Controls.OBC.CDL.Logical.And and4
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical and";
Buildings.Controls.OBC.CDL.Utilities.Assert assMes(
final message="Warning: Differential dry bulb high-limit-control device is not allowed in climate zone 1A, 2A, 3A and 4A!")
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Warning when the wrong device being used";
Buildings.Controls.OBC.CDL.Logical.Not not1
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical not";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con3(
final k=273.15 + 24)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off temperature";
Buildings.Controls.OBC.CDL.Reals.Switch swi4
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off outdoor air enthalpy";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con4(
final k=66000)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Enthalpy cutoff value, J/kg";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon1(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_1)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 1";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon2(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_2)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 2";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon3(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_3)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 3";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon4(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_4)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 4";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon5(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_5)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 5";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon6(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_6)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 6";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon8(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_8)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 8";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon9(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_9)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 9";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon10(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_10)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 10";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon11(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_11)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 11";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon12(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_12)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 12";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon13(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_13)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 13";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon14(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_14)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 14";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon15(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_15)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 15";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titZon16(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Zone_16)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Title 24, zone 16";
Buildings.Controls.OBC.CDL.Logical.Or3 or16
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Zone 1, 3 or 5";
Buildings.Controls.OBC.CDL.Logical.Or3 or17
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Zone 11, 12 or 13";
Buildings.Controls.OBC.CDL.Logical.Or3 or18
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Zone 14, 15 or 16";
Buildings.Controls.OBC.CDL.Logical.Or3 or20
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Zone 1, 3, 5, or 11 to 16";
Buildings.Controls.OBC.CDL.Logical.And and5
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Switch swi5
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con5(
final k=273.15 + 24)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off temperature";
Buildings.Controls.OBC.CDL.Logical.Or3 or19
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Zone 2, 4 or 10";
Buildings.Controls.OBC.CDL.Logical.And and6
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Switch swi6
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con6(
final k=273.15 + 23)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off temperature";
Buildings.Controls.OBC.CDL.Logical.Or3 or21
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Zone 6, 8 or 9";
Buildings.Controls.OBC.CDL.Logical.And and7
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con7(
final k=273.15 + 22)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off temperature";
Buildings.Controls.OBC.CDL.Reals.Switch swi7
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con8(
final k=273.15 + 21)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off temperature";
Buildings.Controls.OBC.CDL.Reals.Switch swi8
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Logical.And and8
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Switch swi9
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Logical.And and9
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Switch swi10
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.AddParameter addPar(
final p=-1) if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off temperature";
Buildings.Controls.OBC.CDL.Reals.Switch swi11
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Logical.And and10
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Logical and";
Buildings.Controls.OBC.CDL.Reals.AddParameter addPar1(
final p=-2)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off temperature";
Buildings.Controls.OBC.CDL.Reals.Switch swi12
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.AddParameter addPar2(
final p=-3)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off temperature";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con9(
final k=273.15 + 24)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off temperature";
Buildings.Controls.OBC.CDL.Conversions.BooleanToReal booToRea(
final realTrue=66000)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Outdoor air enthalpy cutoff";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant titEngSta(
final k=eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Check if Title 24 energy standard is used";
Buildings.Controls.OBC.CDL.Logical.And and11
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Check if Title 24 energy standard is used and the device type is differential enthalpy with fixed dry bulb";
Buildings.Controls.OBC.CDL.Utilities.Assert assMes1(
final message="Warning: When Title 24 energy standard is used, the device type cannot be differential enthalpy with fixed dry bulb!")
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Warning when the wrong device being used";
Buildings.Controls.OBC.CDL.Logical.Not not2
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Logical not";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con10(
final k=0)
if (eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
and not ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.DifferentialEnthalpyWithFixedDryBulb)
"Constant 0";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con11(
final k=0)
if not (ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.DifferentialDryBulb
or ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.FixedDryBulbWithDifferentialDryBulb)
"Constant 0";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant fixDryBulDifDryBul(
final k=ecoHigLimCon == Buildings.Controls.OBC.ASHRAE.G36.Types.ControlEconomizer.FixedDryBulbWithDifferentialDryBulb)
"Fixed dry bulb with differential dry bulb";
Buildings.Controls.OBC.CDL.Logical.And and12
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Min min1
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Smaller input";
Buildings.Controls.OBC.CDL.Reals.Switch swi13
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Logical.And and13
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Min min2
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Smaller input";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con12(
final k=273.15 + 21)
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off temperature";
Buildings.Controls.OBC.CDL.Reals.Switch swi14
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Logical.And and14
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical and";
Buildings.Controls.OBC.CDL.Logical.Not not3
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Logical not";
Buildings.Controls.OBC.CDL.Utilities.Assert assMes2(
final message="Warning: Fixed dry bulb with differential dry bulb high-limit-control device is not allowed in climate zone 1A, 2A, 3A and 4A!")
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.ASHRAE90_1
"Warning when the wrong device being used";
Buildings.Controls.OBC.CDL.Logical.And and15
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Switch swi15
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.Min min3
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Smaller input";
Buildings.Controls.OBC.CDL.Logical.And and16
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Min min4
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Smaller input";
Buildings.Controls.OBC.CDL.Reals.Switch swi16
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Logical.And and17
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Logical and";
Buildings.Controls.OBC.CDL.Reals.Switch swi17
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.Min min5
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Smaller input";
Buildings.Controls.OBC.CDL.Reals.Switch swi18
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Cut off outdoor air temperature";
Buildings.Controls.OBC.CDL.Reals.Min min6
if eneStd == Buildings.Controls.OBC.ASHRAE.G36.Types.EnergyStandard.California_Title_24
"Smaller input";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant noAshCli(
final k=ashCliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.ASHRAEClimateZone.Not_Specified)
"No ASHRAE climate zone";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant noTit24Cli(
final k=tit24CliZon == Buildings.Controls.OBC.ASHRAE.G36.Types.Title24ClimateZone.Not_Specified)
"No Title 24 climate zone";
Buildings.Controls.OBC.CDL.Logical.And noCli
"Climate zone is not specified";
Buildings.Controls.OBC.CDL.Logical.Not not4
"Logical not";
Buildings.Controls.OBC.CDL.Utilities.Assert assMes3(
final message="Warning: Climate zone is not specified!")
"Warning when the climate zone is not specified";
equation
connect(ash1B.y, or3.u1);
connect(ash2B.y, or3.u2);
connect(ash3B.y, or3.u3);
connect(ash3C.y, or1.u1);
connect(ash4B.y, or1.u2);
connect(ash4C.y, or1.u3);
connect(ash5B.y, or2.u1);
connect(ash5C.y, or2.u2);
connect(ash6B.y, or2.u3);
connect(or3.y, or4.u1);
connect(or1.y, or4.u2);
connect(or2.y, or4.u3);
connect(ash7.y, or6.u1);
connect(ash8.y, or6.u2);
connect(or4.y, or7.u1);
connect(or6.y, or7.u2);
connect(ash5A.y, or5.u1);
connect(ash6A.y, or5.u2);
connect(or7.y, and2.u1);
connect(fixDryBul.y, and2.u2);
connect(fixDryBul.y, and1.u2);
connect(or5.y, and1.u1);
connect(and2.y, swi.u2);
connect(con.y, swi.u1);
connect(con1.y, swi1.u1);
connect(and1.y, swi1.u2);
connect(fixDryBul.y, swi2.u2);
connect(con2.y, swi2.u1);
connect(swi2.y, swi1.u3);
connect(ash1B.y, or10.u1);
connect(ash2B.y, or10.u2);
connect(ash3B.y, or10.u3);
connect(ash3C.y, or11.u1);
connect(ash4B.y, or11.u2);
connect(ash4C.y, or11.u3);
connect(ash5A.y, or12.u1);
connect(ash5B.y, or12.u2);
connect(ash5C.y, or12.u3);
connect(ash6A.y, or13.u1);
connect(ash6B.y, or13.u2);
connect(ash7.y, or13.u3);
connect(or10.y, or14.u1);
connect(or11.y, or14.u2);
connect(or12.y, or14.u3);
connect(or14.y, or15.u1);
connect(or13.y, or15.u2);
connect(ash8.y, or15.u3);
connect(or15.y, and3.u1);
connect(difDryBul.y, and3.u2);
connect(and3.y, swi3.u2);
connect(TRet, swi3.u1);
connect(ash1A.y, or8.u3);
connect(ash2A.y, or8.u2);
connect(ash3A.y, or8.u1);
connect(or8.y, or9.u2);
connect(ash4A.y, or9.u1);
connect(or9.y, and4.u1);
connect(difDryBul.y, and4.u2);
connect(and4.y, not1.u);
connect(not1.y, assMes.u);
connect(swi1.y, swi.u3);
connect(swi3.y, swi2.u3);
connect(con4.y, swi4.u1);
connect(fixEntFixDryBul.y, swi4.u2);
connect(hRet, swi4.u3);
connect(swi.y, TCut);
connect(swi4.y, hCut);
connect(titZon1.y, or16.u1);
connect(titZon3.y, or16.u2);
connect(titZon5.y, or16.u3);
connect(titZon11.y, or17.u1);
connect(titZon12.y, or17.u2);
connect(titZon13.y, or17.u3);
connect(titZon14.y, or18.u1);
connect(titZon15.y, or18.u2);
connect(titZon16.y, or18.u3);
connect(or16.y, or20.u1);
connect(or17.y, or20.u2);
connect(or18.y, or20.u3);
connect(or20.y, and5.u1);
connect(fixDryBul.y, and5.u2);
connect(and5.y, swi5.u2);
connect(con5.y, swi5.u1);
connect(titZon2.y, or19.u1);
connect(titZon4.y, or19.u2);
connect(titZon10.y, or19.u3);
connect(or19.y, and6.u1);
connect(fixDryBul.y, and6.u2);
connect(and6.y, swi6.u2);
connect(con6.y, swi6.u1);
connect(swi6.y, swi5.u3);
connect(and7.y, swi7.u2);
connect(con7.y, swi7.u1);
connect(titZon6.y, or21.u1);
connect(or21.y, and7.u1);
connect(titZon8.y, or21.u2);
connect(titZon9.y, or21.u3);
connect(fixDryBul.y, and7.u2);
connect(swi7.y, swi6.u3);
connect(con8.y, swi8.u1);
connect(fixDryBul.y, swi8.u2);
connect(or20.y, and8.u1);
connect(difDryBul.y, and8.u2);
connect(and8.y, swi9.u2);
connect(TRet, swi9.u1);
connect(swi10.y, swi9.u3);
connect(or19.y, and9.u1);
connect(difDryBul.y, and9.u2);
connect(TRet, addPar.u);
connect(and9.y, swi10.u2);
connect(addPar.y, swi10.u1);
connect(and10.y, swi11.u2);
connect(swi11.y, swi10.u3);
connect(or21.y, and10.u1);
connect(difDryBul.y, and10.u2);
connect(addPar1.y, swi11.u1);
connect(TRet, addPar1.u);
connect(addPar2.y, swi12.u1);
connect(swi12.y, swi11.u3);
connect(difDryBul.y, swi12.u2);
connect(TRet, addPar2.u);
connect(swi8.y, swi7.u3);
connect(swi9.y, swi8.u3);
connect(fixEntFixDryBul.y, booToRea.u);
connect(swi5.y, TCut);
connect(booToRea.y, hCut);
connect(titEngSta.y, and11.u2);
connect(difEntFixDryBul.y, and11.u1);
connect(not2.y, assMes1.u);
connect(and11.y, not2.u);
connect(con10.y, swi4.u3);
connect(con11.y, swi3.u1);
connect(con11.y, swi9.u1);
connect(con11.y, addPar.u);
connect(con11.y, addPar1.u);
connect(con11.y, addPar2.u);
connect(fixDryBulDifDryBul.y, and12.u2);
connect(or7.y, and12.u1);
connect(and12.y, swi13.u2);
connect(con3.y, min1.u1);
connect(TRet, min1.u2);
connect(min1.y, swi13.u1);
connect(swi13.y, swi3.u3);
connect(or5.y, and13.u2);
connect(fixDryBulDifDryBul.y, and13.u1);
connect(con12.y, min2.u1);
connect(TRet, min2.u2);
connect(and13.y, swi14.u2);
connect(min2.y, swi14.u1);
connect(con3.y, swi14.u3);
connect(swi14.y, swi13.u3);
connect(and14.y, not3.u);
connect(or9.y, and14.u2);
connect(not3.y, assMes2.u);
connect(fixDryBulDifDryBul.y, and14.u1);
connect(and15.y, swi15.u2);
connect(con5.y, min3.u1);
connect(TRet, min3.u2);
connect(min3.y, swi15.u1);
connect(fixDryBulDifDryBul.y, and15.u2);
connect(fixDryBulDifDryBul.y, and16.u2);
connect(or20.y, and15.u1);
connect(or19.y, and16.u1);
connect(con6.y, min4.u2);
connect(addPar.y, min4.u1);
connect(min4.y, swi16.u1);
connect(and16.y, swi16.u2);
connect(swi16.y, swi15.u3);
connect(con7.y, min5.u2);
connect(addPar1.y, min5.u1);
connect(min5.y, swi17.u1);
connect(and17.y, swi17.u2);
connect(or21.y, and17.u1);
connect(fixDryBulDifDryBul.y, and17.u2);
connect(swi17.y, swi16.u3);
connect(fixDryBulDifDryBul.y, swi18.u2);
connect(con8.y, min6.u2);
connect(addPar2.y, min6.u1);
connect(min6.y, swi18.u1);
connect(con9.y, swi18.u3);
connect(swi18.y, swi17.u3);
connect(swi15.y, swi12.u3);
connect(con11.y, min3.u2);
connect(con11.y, min1.u2);
connect(con11.y, min2.u2);
connect(noAshCli.y,noCli. u1);
connect(noTit24Cli.y,noCli. u2);
connect(noCli.y,not4. u);
connect(not4.y,assMes3. u);
end AirEconomizerHighLimits;
Buildings.Controls.OBC.ASHRAE.G36.Generic.TimeSuppression
Calculate a time-delay period after change in set point
Information
This sequence checks if there is setpoint change and if the time-based suppression has finished. The implementation is according to the Section 5.1.20 of ASHRAE Guideline 36, May 2020.
Calculate a time-delay period after any change in setpoint based on the difference between the controlled variable at the time of the change and the new setpoint. The default time delay period shall be as follows:
-
For thermal zone temperature alarms: 18 minutes per °C (10 minutes per °F)
of difference (
chaRat) but no longer than 120 minutes (1800). -
For thermal zone temperature cooling requests: 9 minutes per °C (5 minutes per °F)
of difference (
chaRat) but no longer than 30 minutes (1800). -
For thermal zone temperature heating requests: 9 minutes per °C (5 minutes per °F)
of difference (
chaRat) but no longer than 30 minutes (1800).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | chaRat | 540 | Gain factor to calculate suppression time based on the change of the setpoint, second per degC. For cooling or heating request, it should be 540 seconds, for temperature alarms, it should be 1080 seconds [s/K] |
| Real | maxTim | 1800 | Maximum suppression time. For cooling or heating request, it should be 1800 seconds, for temperature alarms, it should be 7200 seconds [s] |
| Advanced | |||
| Real | samplePeriod | 120 | Sample period of component, set to the same value as the trim and respond that process static pressure reset [s] |
| Real | dTHys | 0.25 | Near zero temperature difference, below which the difference will be seen as zero [K] |
Connectors
| Type | Name | Description |
|---|---|---|
| input RealInput | TSet | Setpoint temperature [K] |
| input RealInput | TZon | Zone temperature [K] |
| output BooleanOutput | yAftSup | True when there is no setpoint change, or suppression time has passed after setpoint change |
Modelica definition
block TimeSuppression
"Calculate a time-delay period after change in set point"
parameter Real chaRat(final unit="s/K")=540
"Gain factor to calculate suppression time based on the change of the setpoint, second per degC. For cooling or heating request, it should be 540 seconds, for temperature alarms, it should be 1080 seconds";
parameter Real maxTim(
final unit="s",
final quantity="Time")=1800
"Maximum suppression time. For cooling or heating request, it should be 1800 seconds, for temperature alarms, it should be 7200 seconds";
parameter Real samplePeriod(
final unit="s",
final quantity="Time")=120
"Sample period of component, set to the same value as the trim and respond that process static pressure reset";
parameter Real dTHys(
final unit="K",
final quantity="TemperatureDifference")=0.25
"Near zero temperature difference, below which the difference will be seen as zero";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TSet(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature") "Setpoint temperature";
Buildings.Controls.OBC.CDL.Interfaces.RealInput TZon(
final unit="K",
final displayUnit="degC",
final quantity="ThermodynamicTemperature")
"Zone temperature";
Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput yAftSup
"True when there is no setpoint change, or suppression time has passed after setpoint change";
Buildings.Controls.OBC.CDL.Reals.Min supTim
"Calculated suppression time due to the setpoint change";
protected
Buildings.Controls.OBC.CDL.Discrete.Sampler samSet(
final samplePeriod=samplePeriod)
"Sample current setpoint";
Buildings.Controls.OBC.CDL.Discrete.UnitDelay uniDel(
final samplePeriod=samplePeriod)
"Delay value to record input value";
Buildings.Controls.OBC.CDL.Reals.Abs abs1
"Absolute change of the setpoint temperature";
Buildings.Controls.OBC.CDL.Discrete.TriggeredSampler triSam
"New setpoint temperature";
Buildings.Controls.OBC.CDL.Logical.Edge edg
"Instants when input becomes true";
Buildings.Controls.OBC.CDL.Logical.Latch lat
"Output true when there is setpoint change and maintain the true output until the suppresiong time has passed";
Buildings.Controls.OBC.CDL.Logical.Latch lat1
"Output true when the suppression time has passed";
Buildings.Controls.OBC.CDL.Logical.Timer tim
"Time when the setpoint is being changed";
Buildings.Controls.OBC.CDL.Reals.Greater gre1
"Check if current model time is greater than the initial period equaling the sample time";
Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr(
final t=dTHys,
final h=0.5*dTHys)
"Check if there is setpoint change";
Buildings.Controls.OBC.CDL.Reals.Sources.ModelTime modTim
"Time of the model";
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai(
final k=chaRat)
"Setpoint change rate";
Buildings.Controls.OBC.CDL.Reals.Subtract sub1
"Calculate difference of previous and current setpoints";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant con(
final k=samplePeriod)
"Sample period time";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant conZer(
final k=0)
"Constant zero";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant maxSupTim(
final k=maxTim) "Maximum suppression time ";
Buildings.Controls.OBC.CDL.Logical.Sources.Constant con5(
final k=true)
"Constant true";
Buildings.Controls.OBC.CDL.Reals.Switch swi
"Use setpoint different value when sample period time has passed";
Buildings.Controls.OBC.CDL.Logical.TrueHoldWithReset truHol(
final duration=samplePeriod)
"Hold true signal for sample period of time";
Buildings.Controls.OBC.CDL.Logical.Switch pasSupTim
"Check if suppression time has passed";
Buildings.Controls.OBC.CDL.Reals.Greater pasSup
"Check if the change has been suppressed by sufficient time";
Buildings.Controls.OBC.CDL.Reals.Subtract temDif
"Difference between setpoint and zone temperature";
Buildings.Controls.OBC.CDL.Discrete.TriggeredSampler triSam1
"Zone temperature at the moment when there is setpoint change";
Buildings.Controls.OBC.CDL.Reals.Abs abs2
"Absolute temperature difference";
equation
connect(TSet, samSet.u);
connect(samSet.y, uniDel.u);
connect(greThr.y, lat.u);
connect(lat.y,tim. u);
connect(lat.y,edg. u);
connect(edg.y,lat1. clr);
connect(modTim.y,gre1. u1);
connect(con.y,gre1. u2);
connect(gre1.y,swi. u2);
connect(sub1.y,swi. u1);
connect(conZer.y,swi. u3);
connect(swi.y, abs1.u);
connect(abs1.y, greThr.u);
connect(truHol.y,lat. clr);
connect(gai.y,supTim. u1);
connect(maxSupTim.y,supTim. u2);
connect(lat.y, pasSupTim.u2);
connect(lat1.y, pasSupTim.u1);
connect(con5.y, pasSupTim.u3);
connect(tim.y, pasSup.u1);
connect(pasSup.y, lat1.u);
connect(pasSup.y, truHol.u);
connect(pasSupTim.y, yAftSup);
connect(TSet, triSam.u);
connect(TZon, triSam1.u);
connect(triSam.y, temDif.u1);
connect(edg.y, triSam1.trigger);
connect(edg.y, triSam.trigger);
connect(temDif.y, abs2.u);
connect(abs2.y, gai.u);
connect(supTim.y, pasSup.u2);
connect(uniDel.y, sub1.u2);
connect(samSet.y, sub1.u1);
connect(triSam1.y, temDif.u2);
end TimeSuppression;
Buildings.Controls.OBC.ASHRAE.G36.Generic.TrimAndRespond
Block to inplement trim and respond logic
Information
This block implements the trim and respond logic according to ASHRAE guideline G36, Section 5.1.14.3 and 5.1.14.4.
For each upstream system or plant set point being controlled by a trim and respond loop, define the initial values in system or plant sequences. Values for trim, respond, time step, etc. shall be tuned to provide stable control.
| Variable | Value | Definition |
|---|---|---|
| Device | AHU Supply Fan | Associated device |
| SP0 | iniSet | Initial setpoint |
| SPmin | minSet | Minimum setpoint |
| SPmax | maxSet | Maximum setpoint |
| Td | delTim | Delay timer |
| T | samplePeriod | Time step |
| I | numIgnReq | Number of ignored requests |
| R | numOfReq | Number of requests |
| SPtrim | triAmo | Trim amount |
| SPres | resAmo | Respond amount |
| SPres_max | maxRes | Maximum response per time interval |
The trim and respond logic shall reset setpoint within the range minSet to
maxSet.
When the associated device is off (uDevSta=false), the setpoint
shall be iniSet.
The reset logic shall be active while the associated device is proven
on (uDevSta=true), starting delTim after initial
device start command.
When active, every time step samplePeriod, trim the setpoint by
triAmo.
If there are more than numIgnReq requests, respond by changing
the setpoint by resAmo*(numOfReq-numIgnReq), i.e., the number of
requests minus the number of ignored requests, but no more than maxRes.
In other words, every time step samplePeriod:
- Change setpoint by
triAmo; - If
numOfReq > numIgnReq, also change setpoint byresAmo*(numOfReq -numIgnReq)but no more thanmaxRes.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | iniSet | Initial setpoint | |
| Real | minSet | Minimum setpoint | |
| Real | maxSet | Maximum setpoint | |
| Real | delTim | Delay time [s] | |
| Real | samplePeriod | Sample period of component [s] | |
| Integer | numIgnReq | Number of ignored requests | |
| Real | triAmo | Trim amount | |
| Real | resAmo | Respond amount (must have opposite sign of triAmo) | |
| Real | maxRes | Maximum response per time interval (must have same sign as resAmo) |
Connectors
| Type | Name | Description |
|---|---|---|
| input IntegerInput | numOfReq | Number of requests from zones/systems |
| input BooleanInput | uDevSta | On/Off status of the associated device |
| output RealOutput | y | Setpoint that have been reset |
Modelica definition
block TrimAndRespond "Block to inplement trim and respond logic"
parameter Real iniSet "Initial setpoint";
parameter Real minSet "Minimum setpoint";
parameter Real maxSet "Maximum setpoint";
parameter Real delTim(
final unit="s",
final quantity="Time",
final min=100*1E-15) "Delay time";
parameter Real samplePeriod(
final unit="s",
final quantity="Time",
final min=1E-3)
"Sample period of component";
parameter Integer numIgnReq "Number of ignored requests";
parameter Real triAmo "Trim amount";
parameter Real resAmo "Respond amount (must have opposite sign of triAmo)";
parameter Real maxRes "Maximum response per time interval (must have same sign as resAmo)";
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput numOfReq
"Number of requests from zones/systems";
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uDevSta
"On/Off status of the associated device";
Buildings.Controls.OBC.CDL.Interfaces.RealOutput y
"Setpoint that have been reset";
Buildings.Controls.OBC.CDL.Logical.TrueDelay tim(
final delayTime=delTim + samplePeriod,
final delayOnInit=true)
"Send an on signal after some delay time";
Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr
"Check if the real requests is more than ignored requests setting";
Buildings.Controls.OBC.CDL.Reals.Switch netRes "Net setpoint reset value";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant resAmoCon(
final k=resAmo)
"Respond amount constant";
Buildings.Controls.OBC.CDL.Reals.Multiply pro
"Products of net requests and respond amount value";
Buildings.Controls.OBC.CDL.Reals.Multiply pro1 "Product of trim and respond amount";
Buildings.Controls.OBC.CDL.Reals.Multiply pro2 "Product of respond and maximum amount";
Buildings.Controls.OBC.CDL.Discrete.UnitDelay uniDel(
final samplePeriod=samplePeriod,
final y_start=iniSet)
"Output the input signal with a unit delay";
Buildings.Controls.OBC.CDL.Reals.Switch swi
"Switch between initial setpoint and reseted setpoint";
Buildings.Controls.OBC.CDL.Reals.Switch swi1
"Before instant (device ON + delTim + samplePeriod), the setpoint should not be trimmed";
Buildings.Controls.OBC.CDL.Reals.Switch swi2
"Reinitialize setpoint to initial setting when device become OFF";
Buildings.Controls.OBC.CDL.Reals.Switch swi3 "Logical switch";
Buildings.Controls.OBC.CDL.Discrete.Sampler sampler(
final samplePeriod=samplePeriod)
"Sample number of requests";
Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr1
"Check if trim and response amount have same sign";
Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr2
"Check if trim and response amount have opposite sign";
Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr1
"Check if response amount have positive sign";
Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai(
final k=-1) "Convert results back to negative";
protected
Buildings.Controls.OBC.CDL.Reals.Sources.Constant iniSetCon(k=iniSet)
"Initial setpoint";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant numIgnReqCon(k=numIgnReq)
"Number of ignored requests";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant triAmoCon(k=triAmo)
"Trim amount constant";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant maxResCon(k=maxRes)
"Maximum response per time interval";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant maxSetCon(k=maxSet)
"Maximum setpoint constant";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant zerTri(k=0)
"Zero reset amount during time range from (device ON) to (device ON + delTim + timSet)";
Buildings.Controls.OBC.CDL.Conversions.IntegerToReal intToRea
"Convert integer input to real output";
Buildings.Controls.OBC.CDL.Reals.Subtract difReqIgnReq
"Difference between ignored request number and the real request number";
Buildings.Controls.OBC.CDL.Reals.Add add1
"Increase setpoint by amount of value defined from reset logic";
Buildings.Controls.OBC.CDL.Reals.Add add2 "Net reset value";
Buildings.Controls.OBC.CDL.Reals.Min minInp
"Total response should not be more than maximum response";
Buildings.Controls.OBC.CDL.Reals.Min min1
"Reset setpoint should not be higher than the maximum setpoint";
Buildings.Controls.OBC.CDL.Logical.And and2
"After (device ON + delTim + timSta), when request number becomes more than ignored requests number";
Buildings.Controls.OBC.CDL.Logical.Not not1 "Logical Not";
Buildings.Controls.OBC.CDL.Reals.Sources.Constant minSetCon(k=minSet)
"Minimum setpoint constant";
Buildings.Controls.OBC.CDL.Reals.Max maxInp
"Reset setpoint should not be lower than the minimum setpoint";
Buildings.Controls.OBC.CDL.Utilities.Assert assMes(
final message="Trim amount 'triAmo' and respond amount 'resAmo' must have opposite signs.")
"Generate alarm message";
Buildings.Controls.OBC.CDL.Utilities.Assert assMes2(
final message="Respond amount 'resAmo' and maximum respond amount 'maxRes' must have same sign.")
"Generate alarm message";
Buildings.Controls.OBC.CDL.Reals.Abs abs "Absolute value of real input";
Buildings.Controls.OBC.CDL.Reals.Abs abs1 "Absolute value of real input";
equation
connect(difReqIgnReq.y, greThr.u);
connect(pro.y, minInp.u1);
connect(triAmoCon.y, add2.u1);
connect(add2.y, netRes.u1);
connect(iniSetCon.y, swi.u3);
connect(swi.y, y);
connect(maxSetCon.y, min1.u2);
connect(add1.y, min1.u1);
connect(uniDel.y, add1.u1);
connect(triAmoCon.y, swi1.u1);
connect(zerTri.y, swi1.u3);
connect(greThr.y, and2.u2);
connect(and2.y, netRes.u2);
connect(iniSetCon.y, swi2.u1);
connect(swi2.y, swi.u1);
connect(swi2.y, uniDel.u);
connect(uDevSta, not1.u);
connect(not1.y, swi2.u2);
connect(min1.y, maxInp.u1);
connect(minSetCon.y, maxInp.u2);
connect(numOfReq, intToRea.u);
connect(intToRea.y, sampler.u);
connect(difReqIgnReq.y, pro.u1);
connect(uDevSta, tim.u);
connect(tim.y, swi.u2);
connect(tim.y, swi1.u2);
connect(and2.u1, tim.y);
connect(maxInp.y, swi2.u3);
connect(triAmoCon.y, pro1.u1);
connect(resAmoCon.y, pro1.u2);
connect(pro1.y, lesThr1.u);
connect(lesThr1.y, assMes.u);
connect(resAmoCon.y, pro2.u1);
connect(maxResCon.y, pro2.u2);
connect(pro2.y, greThr2.u);
connect(greThr2.y, assMes2.u);
connect(resAmoCon.y, abs.u);
connect(abs.y, pro.u2);
connect(maxResCon.y, abs1.u);
connect(abs1.y, minInp.u2);
connect(minInp.y, swi3.u1);
connect(resAmoCon.y, greThr1.u);
connect(greThr1.y, swi3.u2);
connect(netRes.y, add1.u2);
connect(swi1.y, netRes.u3);
connect(minInp.y, gai.u);
connect(gai.y, swi3.u3);
connect(swi3.y, add2.u2);
connect(sampler.y, difReqIgnReq.u1);
connect(numIgnReqCon.y, difReqIgnReq.u2);
end TrimAndRespond;