Control Schemes

Location = Libraries/Controls and Performance Data/Control Schemes

 

Simergy in 3s Reminder:

 

Control schemes are typically referenced by Controllers.  They provide the link to the schedules, which shape the control schemes.  They are typically part of the input values for the different controller properties that can be accessed within the diagram workspace of the Zone HVAC Groups, Air Loops or any of the Water Loop types. The Control Scheme can be selected by expanding the Control Name field in the Controller Properties and selecting from the drop down list (figure below).

 

 

Figure - The Control Scheme can be selected from the drop down list in the expanded control name field for the Controller Properties (shown on lower left section of Workspace)

 

Note: Although not yet fully implemented the intent is that for each section there will be links directly to the EnergyPlus Input Output Reference.  In addition the links will also be included in the Type and Sub Type Mapping Table.

Type and Sub Type Mapping

The Type and Sub Type options that can be selected from the drop down lists in that area of the workspace, which filter the Source Library to display the variables the user can select to include, along with a value, in a Library Entry.

 

Type Options Sub Type Options EnergyPlus Objects (IO Reference links)

Setpoint Scheme

SingleHeating
SingleCooling
SingleHeatingorCooling
DualSetpoint
ThermalComfortFangerSingleHeating
ThermalComfortFangerSingleCooling
ThermalComfortFangerSingleHeatingorCooling
ThermalComfortFangerDualSetpoint
ThermostatSetpoint:SingleHeating
ThermostatSetpoint:SingleCooling
ThermostatSetpoint:SingleHeatingOrCooling
ThermostatSetpoint:DualSetpoint
ThermostatSetpoint:ThermalComfortFangerSingleHeating
ThermostatSetpoint:ThermalComfortFangerSingleCooling
ThermostatSetpoint:ThermalComfortFangerSingleHeatingOrCooling
ThermostatSetpoint:ThermalComfortFangerDualSetpoint

Control and Sequencing Schemes

CoolingLoad
HeatingLoad
OutdoorDryBulb
OutdoorWetBulb
OutdoorRelativeHumidity
ComponentSetpoint
OutdoorDryBulbDifference
OutdoorWetBulbDifference
OutdoorDewpoint
OutdoorDewpointDifference
ElectricLoadCenter
Thermal Energy Storage
User Defined
PlantEquipmentOperation:CoolingLoad
PlantEquipmentOperation:HeatingLoad
PlantEquipmentOperation:OutdoorDryBulb
PlantEquipmentOperation:OutdoorWetBulb
PlantEquipmentOperation:OutdoorRelativeHum
PlantEquipmentOperation:ComponentSetpoint
PlantEquipmentOperation:OutdoorDryBulbDiffe
PlantEquipmentOperation:OutdoorWetBulbDiff
PlantEquipmentOperation:OutdoorDewpoint
PlantEquipmentOperation:OutdoorDewpointDiff
ElectricLoadCenter:Distribution
 
 

Availability Manager Scheme

Scheduled

ScheduledOn

ScheduledOff

NightCycle

High Temperature Turn On

High Temperature Turn Off

Low Temperature Turn On

Low Temperature Turn Off

Night Ventilation

Hybrid Ventilation

Optimum Start

AvailabilityManager:Scheduled
AvailabilityManager:ScheduledOn
AvailabilityManager:ScheduledOff
AvailabilityManager:NightCycle
AvailabilityManager:HighTemperatureTurnOn
AvailabilityManager:HighTemperatureTurnOff
AvailabilityManager:LowTemperatureTurnOn
AvailabilityManager:LowTemperatureTurnOff
AvailabilityManager:Night Ventilation
AvailabilityManager:Hybrid Ventilation

Demand Manager Scheme

ExteriorLights
Lights
ElectricalEquipment
Thermostats
Ventilation
DemandManager:ExteriorLights
DemandManager:Lights
DemandManager:ElectricalEquipment
DemandManager:Thermostats
 

 

Availability Manager Schemes

Are System Level Controls that appear in either Air Loops or Water Loops in the Diagram Workspace.  Some of the managers monitor the temperature at an air or plant node to determine whether the system should be on or off.

 

Version 1 Note:  The following Availability Manager Schemes that are included with the Simergy Installation reference a Sensor Node Name that is required for EnergyPlus to run.  The Sensor Node Name is currently automatically set (hard-wired) to the Outside Air Node in the project, and you cannot edit this directly within Simergy in Version 1.  If you wish to change this value you will need to edit the IDF file that is created by Simergy manually.  

The actual action of turning on or off a loop is taken by the loop prime movers: fans for Air Loops and zone components, and pumps for Plant (Water) loops. For instance when a fan is deciding whether it is on or off, it checks its on/off schedule and whether the loop availability status flag is CycleOn or ForceOff. If the schedule is on and the status flag is ForceOff, the fan will be off. If the fan schedule says off and the status flag is CycleOn, the fan will be on. Thus the availability managers overrule the fan on/off schedule. The availability managers, air loops, and plant loops all have report variables which may be used to verify the action of the loop.

 

Availability managers for AirLoopHVAC systems also control the availability of zone exhaust fans (Ref. Fan:ZoneExhaust) and terminal unit fans (Ref. AirTerminal:SingleDuct:SeriesPIU: Reheat, AirTerminal:SingleDuct: ParallelPIU:Reheat, and AirTerminal:SingleDuct:VAV: Reheat:VariableSpeedFan) in the zones served by the AirLoopHVAC system.

 

Availability Manager SubTypes

Properties

Value Source

Scheduled

Schedule Name

Libraries:Schedules:Schedule Editor

ScheduledOn

Schedule Name

Libraries:Schedules:Schedule Editor

ScheduledOff

Schedule Name

Libraries:Schedules:Schedule Editor

NightCycle

Applicability Schedule Name

Fan Schedule Name

Control Type

Thermostat Tolerance

Cycling Run Time

Libraries:Schedules:Schedule Editor
Libraries:Schedules:Schedule Editor
Drop down list options (set)
?
?

OptimumStart

 

 

HighTemperatureTurnOn

Temperature

Direct Input

HighTemperatureTurnOff

Temperature

Direct Input

LowTemperatureTurnOn

Temperature

Direct Input

LowTemperatureTurnOff

Temperature

Direct Input

Night Ventilation

Applicability Schedule Name

Fan Schedule Name

Ventilation Temperature Schedule

Ventilation Temperature Difference

Ventilation Temperature Low Limit

Night Venting Flow Fraction

 

Hybrid Ventilation

 

 

 

 

 

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