Knowledgebase: HVAC
HVAC System Types
Posted by Michael J. Witte, Last modified by Richard Raustad on 16 October 2012 03:36 PM

What types of HVAC system can be simulated using EnergyPlus? EnergyPlus HVAC systems input is flexible, so many different types of systems can be built using the basic available components. There are also compound components which represent common equipment types, and HVACTemplate systems which simplify the input for specific systems. This list gives an overview of HVAC object in EnergyPlus grouped by category as of version 3.0 (Nov 2008).

HVAC Templates
---------------------------
HVACTemplate:Thermostat
HVACTemplate:Zone:IdealLoadsAirSystem
HVACTemplate:Zone:FanCoil
HVACTemplate:Zone:PTAC
HVACTemplate:Zone:PTHP
HVACTemplate:Zone:Unitary
HVACTemplate:Zone:VAV
HVACTemplate:Zone:VAV:FanPowered
HVACTemplate:System:Unitary
HVACTemplate:System:VAV
HVACTemplate:Plant:ChilledWaterLoop
HVACTemplate:Plant:Chiller
HVACTemplate:Plant:Tower
HVACTemplate:Plant:HotWaterLoop
HVACTemplate:Plant:Boiler

Zone HVAC Forced Air Units
---------------------------
ZoneHVAC:IdealLoadsAirSystem
ZoneHVAC:FourPipeFanCoil
ZoneHVAC:WindowAirConditioner
ZoneHVAC:PackagedTerminalAirConditioner
ZoneHVAC:PackagedTerminalHeatPump
ZoneHVAC:EnergyRecoveryVentilator
ZoneHVAC:EnergyRecoveryVentilator:Controller
ZoneHVAC:UnitVentilator
ZoneHVAC:UnitHeater
ZoneHVAC:TerminalUnit:VariableRefrigerantFlow


Zone HVAC Radiative/Convective Units
---------------------------
ZoneHVAC:Baseboard:RadiantConvective:Water
ZoneHVAC:Baseboard:Convective:Water
ZoneHVAC:Baseboard:Convective:Electric
ZoneHVAC:LowTemperatureRadiant:VariableFlow
ZoneHVAC:LowTemperatureRadiant:ConstantFlow
ZoneHVAC:LowTemperatureRadiant:Electric
ZoneHVAC:LowTemperatureRadiant:SurfaceGroup
ZoneHVAC:HighTemperatureRadiant
ZoneHVAC:VentilatedSlab

Zone HVAC Air Loop Terminal Units
---------------------------
AirTerminal:SingleDuct:Uncontrolled
AirTerminal:SingleDuct:ConstantVolume:Reheat
AirTerminal:SingleDuct:VAV:NoReheat
AirTerminal:SingleDuct:VAV:Reheat
AirTerminal:SingleDuct:VAV:Reheat:VariableSpeedFan
AirTerminal:SingleDuct:VAV:HeatAndCool:NoReheat
AirTerminal:SingleDuct:VAV:HeatAndCool:Reheat
AirTerminal:SingleDuct:SeriesPIU:Reheat
AirTerminal:SingleDuct:ParallelPIU:Reheat
AirTerminal:SingleDuct:ConstantVolume:FourPipeInduction
AirTerminal:DualDuct:ConstantVolume
AirTerminal:DualDuct:VAV
ZoneHVAC:AirDistributionUnit

Fans
---------------------------
Fan:ConstantVolume
Fan:VariableVolume
Fan:OnOff
Fan:ZoneExhaust
FanPerformance:NightVentilation

Coils
---------------------------
Coil:Cooling:Water
Coil:Cooling:Water:DetailedGeometry
Coil:Cooling:DX:SingleSpeed
Coil:Cooling:DX:TwoSpeed
Coil:Cooling:DX:MultiSpeed
Coil:Cooling:DX:TwoStageWithHumidityControlMode
CoilPerformance:DX:Cooling
Coil:Heating:Water
Coil:Heating:Steam
Coil:Heating:Electric
Coil:Heating:Gas
Coil:Heating:Desuperheater
Coil:Heating:DX:SingleSpeed
Coil:Heating:DX:MultiSpeed
Coil:Cooling:WaterToAirHeatPump:ParameterEstimation
Coil:Heating:WaterToAirHeatPump:ParameterEstimation
Coil:Cooling:WaterToAirHeatPump:EquationFit
Coil:Heating:WaterToAirHeatPump:EquationFit
Coil:WaterHeating:AirToWaterHeatPump
Coil:WaterHeating:Desuperheater
CoilSystem:Cooling:Water:HeatExchangerAssisted
CoilSystem:Cooling:DX:HeatExchangerAssisted
Coil:Cooling:DX:VariableRefrigerantFlow
Coil:Heating:DX:VariableRefrigerantFlow

Evaporative Coolers
---------------------------
EvaporativeCooler:Direct:CelDekPad
EvaporativeCooler:Indirect:CelDekPad
EvaporativeCooler:Indirect:WetCoil
EvaporativeCooler:Indirect:ResearchSpecial

Humidifiers and Dehumidifiers
---------------------------
Humidifier:Steam:Electric
Dehumidifier:Desiccant:NoFans
Dehumidifier:Desiccant:System

Heat Recovery
---------------------------
HeatExchanger:AirToAir:FlatPlate
HeatExchanger:AirToAir:SensibleAndLatent
HeatExchanger:Desiccant:BalancedFlow
HeatExchanger:Desiccant:BalancedFlow:PerformanceDataType1

Unitary Equipment
---------------------------
AirLoopHVAC:Unitary:Furnace:HeatOnly
AirLoopHVAC:Unitary:Furnace:HeatCool
AirLoopHVAC:UnitaryHeatOnly
AirLoopHVAC:UnitaryHeatCool
AirLoopHVAC:UnitaryHeatPump:AirToAir
AirLoopHVAC:UnitaryHeatPump:WaterToAir
AirLoopHVAC:UnitaryHeatCool:VAVChangeoverBypass
AirLoopHVAC:UnitaryHeatPump:AirToAir:MultiSpeed
AirLoopHVAC:UnitaryCoolOnly

Variable Refrigerant Flow Equipment
-------------------------------------
AirConditioner:VariableRefrigerantFlow


Air Distribution
---------------------------
AirLoopHVAC
AirLoopHVAC:OutdoorAirSystem:EquipmentList
AirLoopHVAC:OutdoorAirSystem
OutdoorAir:Mixer
AirLoopHVAC:ZoneSplitter
AirLoopHVAC:SupplyPlenum
AirLoopHVAC:SupplyPath
AirLoopHVAC:ZoneMixer
AirLoopHVAC:ReturnPlenum
AirLoopHVAC:ReturnPath
Duct

Pumps
---------------------------
Pump:VariableSpeed
Pump:ConstantSpeed
Pump:VariableSpeed:Condensate
HeaderedPumps:VariableSpeed
HeaderedPumps:ConstantSpeed

Solar Collectors
---------------------------
SolarCollectorPerformance:FlatPlate
SolarCollector:FlatPlate:Water
SolarCollector:FlatPlate:PhotovoltaicThermal
SolarCollectorPerformance:PhotovoltaicThermal:Simple
SolarCollector:UnglazedTranspired
SolarCollector:UnglazedTranspired:Multisystem

Plant Heating and Cooling Equipment
---------------------------
Boiler:HotWater
Boiler:Steam
Boiler:HotWater:SPARK
Chiller:Electric:EIR
Chiller:Electric:ReformulatedEIR
Chiller:Electric
Chiller:Electric:SPARK
Chiller:Absorption:Indirect
Chiller:Absorption
Chiller:ConstantCOP
Chiller:EngineDriven
Chiller:CombustionTurbine
ChillerHeater:Absorption:DirectFired
HeatPump:WaterToWater:EquationFit:Heating
HeatPump:WaterToWater:EquationFit:Cooling
HeatPump:WaterToWater:ParameterEstimation:Cooling
HeatPump:WaterToWater:ParameterEstimation:Heating
DistrictCooling
DistrictHeating

Condenser Equipment and Heat Exchangers
---------------------------
CoolingTower:SingleSpeed
CoolingTower:TwoSpeed
CoolingTower:VariableSpeed
CoolingTowerPerformance:CoolTools
CoolingTowerPerformance:YorkCalc
FluidCooler:SingleSpeed
FluidCooler:TwoSpeed
GroundHeatExchanger:Vertical
GroundHeatExchanger:Pond
GroundHeatExchanger:Surface
HeatExchanger:Hydronic
HeatExchanger:Plate
HeatExchanger:WatersideEconomizer

Water Heaters and Thermal Storage
---------------------------
WaterHeater:Mixed
WaterHeater:Stratified
WaterHeater:Sizing
WaterHeater:HeatPump
ThermalStorage:Ice:Simple
ThermalStorage:Ice:Detailed
ThermalStorage:ChilledWater:Mixed
ThermalStorage:ChilledWater:Stratified

Plant-Condenser Loops
---------------------------
PlantLoop
CondenserLoop
Pipe:Adiabatic
Pipe:Adiabatic:Steam
Pipe:Indoor
Pipe:Outdoor
Pipe:Underground
PlantLoopConnection
PlantLoopConnection:Controlled


Michael J. Witte, GARD Analytics, Inc.

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