Buildings.Templates.ZoneEquipment

Zone equipment

Information

This package contains templates for zone equipment (HVAC terminal units).

Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

Name Description
Buildings.Templates.ZoneEquipment.VAVBoxCoolingOnly VAVBoxCoolingOnly VAV terminal unit cooling only
Buildings.Templates.ZoneEquipment.VAVBoxReheat VAVBoxReheat VAV terminal unit with reheat
Buildings.Templates.ZoneEquipment.Components Components Package with component models
Buildings.Templates.ZoneEquipment.Data Data Records for design and operating parameters
Buildings.Templates.ZoneEquipment.Types Types Package with type definitions
Buildings.Templates.ZoneEquipment.Validation Validation Package with validation models
Buildings.Templates.ZoneEquipment.Interfaces Interfaces Interface classes

Buildings.Templates.ZoneEquipment.VAVBoxCoolingOnly Buildings.Templates.ZoneEquipment.VAVBoxCoolingOnly

VAV terminal unit cooling only

Buildings.Templates.ZoneEquipment.VAVBoxCoolingOnly

Information

Description

This template represents a cooling-only VAV terminal unit (or shut off box).

The possible configuration options are enumerated in the table below. The user may refer to ASHRAE (2021) for further details. The first option displayed in bold characters corresponds to the default configuration.

Configuration parameterOptionsNotes
VAV damper Modulating damper
Controller ASHRAE Guideline 36 controller An open loop controller is also available for validation purposes only.

References

Extends from Buildings.Templates.ZoneEquipment.Interfaces.VAVBox (Interface class for VAV terminal unit).

Parameters

TypeNameDefaultDescription
replaceable package MediumAirAirAir medium
replaceable package MediumHeaWatWaterHHW medium
VAVBoxdatredeclare Buildings.Template...Design and operating parameters
Configuration
ConfigurationtypBuildings.Templates.ZoneEqui...Type of system
VAV damper
ModulatingdamVAVredeclare inner Buildings.Te...VAV damper
Dynamics
Conservation equations
DynamicsenergyDynamicsModelica.Fluid.Types.Dynamic...Type of energy balance: dynamic (3 initialization options) or steady state
Assumptions
BooleanallowFlowReversalLiqtrue= true to allow flow reversal, false restricts to design direction - CHW and HW side
Advanced
Diagnostics
Booleanshow_Tfalse= true, if actual temperature at ports of subcomponents is computed

Connectors

TypeNameDescription
FluidPort_aport_SupSupply air from AHU
FluidPort_aport_SupColDual duct cold deck air supply from AHU
FluidPort_aport_SupHotDual duct hot deck air supply from AHU
FluidPort_bport_DisDischarge air
FluidPort_aport_RetReturn air
FluidPort_aport_aHeaWatHHW supply port
FluidPort_bport_bHeaWatHHW return port
BusbusTerminal unit control bus

Modelica definition

model VAVBoxCoolingOnly "VAV terminal unit cooling only" extends Buildings.Templates.ZoneEquipment.Interfaces.VAVBox( final typ=Buildings.Templates.ZoneEquipment.Types.Configuration.VAVBoxCoolingOnly, redeclare final Buildings.Templates.Components.Coils.None coiHea, redeclare replaceable Buildings.Templates.ZoneEquipment.Components.Controls.G36VAVBoxCoolingOnly ctl "Guideline 36 controller for VAV terminal unit cooling only"); end VAVBoxCoolingOnly;

Buildings.Templates.ZoneEquipment.VAVBoxReheat Buildings.Templates.ZoneEquipment.VAVBoxReheat

VAV terminal unit with reheat

Buildings.Templates.ZoneEquipment.VAVBoxReheat

Information

Description

This template represents a VAV terminal unit with reheat.

The possible configuration options are enumerated in the table below. The user may refer to ASHRAE (2021) for further details. The first option displayed in bold characters corresponds to the default configuration.

Configuration parameterOptionsNotes
VAV damper Modulating damper
Reheat coil Hot water coil with two-way valve
Modulating electric heating coil
Controller ASHRAE Guideline 36 controller An open loop controller is also available for validation purposes only.

References

Extends from Buildings.Templates.ZoneEquipment.Interfaces.VAVBox (Interface class for VAV terminal unit).

Parameters

TypeNameDefaultDescription
replaceable package MediumAirAirAir medium
replaceable package MediumHeaWatWaterHHW medium
VAVBoxdatredeclare Buildings.Template...Design and operating parameters
Configuration
ConfigurationtypBuildings.Templates.ZoneEqui...Type of system
Heating coil
WaterBasedHeatingcoiHearedeclare inner Buildings.Te...Heating coil
VAV damper
ModulatingdamVAVredeclare inner Buildings.Te...VAV damper
Dynamics
Conservation equations
DynamicsenergyDynamicsModelica.Fluid.Types.Dynamic...Type of energy balance: dynamic (3 initialization options) or steady state
Assumptions
BooleanallowFlowReversalLiqtrue= true to allow flow reversal, false restricts to design direction - CHW and HW side
Advanced
Diagnostics
Booleanshow_Tfalse= true, if actual temperature at ports of subcomponents is computed

Connectors

TypeNameDescription
FluidPort_aport_SupSupply air from AHU
FluidPort_aport_SupColDual duct cold deck air supply from AHU
FluidPort_aport_SupHotDual duct hot deck air supply from AHU
FluidPort_bport_DisDischarge air
FluidPort_aport_RetReturn air
FluidPort_aport_aHeaWatHHW supply port
FluidPort_bport_bHeaWatHHW return port
BusbusTerminal unit control bus

Modelica definition

model VAVBoxReheat "VAV terminal unit with reheat" extends Buildings.Templates.ZoneEquipment.Interfaces.VAVBox( final typ=Buildings.Templates.ZoneEquipment.Types.Configuration.VAVBoxReheat, redeclare replaceable Buildings.Templates.ZoneEquipment.Components.Controls.G36VAVBoxReheat ctl "Guideline 36 controller for VAV terminal unit with reheat"); end VAVBoxReheat;