modelAirRearDoorHexActive

Example model for air-cooled rack with active rear door heat exchanger
Diagram of AirRearDoorHexActiveOpen the diagram
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Extends from Buildings.Fluid.DataCenters.Racks.Hybrid.Examples.AirRearDoorHexPassive (Example model for air-cooled rack with passive rear door heat exchanger).

Information

Example model of an air-cooled IT rack with an active rear door heat exchanger.

This model is identical to Buildings.Fluid.DataCenters.Racks.Hybrid.Examples.AirRearDoorHexPassive except that the rear door heat exchanger has a built-in fan.

Parameters

TypeNameDefaultDescription
Modelica.Units.SI.PowerPAir_nominal (from AirRearDoorHexPassive)48*1320Design power for air-cooled IT
Modelica.Units.SI.TemperatureTAirDatHal (from AirRearDoorHexPassive)303.15Air temperature in data hall
Modelica.Units.SI.SpecificHeatCapacitycpAir_default (from AirRearDoorHexPassive)MediumAir.specificHeatCapacityCp(MediumAir.setState_pTX(T = MediumAir.T_default, p = MediumAir.p_default, X = MediumAir.X_default[1:MediumAir.nXi]))Specific heat capacity of air
Buildings.Fluid.DataCenters.Racks.Air.Data.GenericdatAir (from AirRearDoorHexPassive)Air-cooled rack performance data
Modelica.Units.SI.TemperatureTReaDooCooIn_nominal (from AirRearDoorHexPassive)273.15 + 25Rear door heat exchanger coolant supply temperature
Modelica.Units.SI.TemperatureTReaDooCooOut_nominal (from AirRearDoorHexPassive)273.15 + 35Rear door heat exchanger coolant return temperature
Modelica.Units.SI.TemperatureTAirReaDooIn_nominal (from AirRearDoorHexPassive)TAirDatHal + (datAir.TOut_nominal - datAir.TIn_nominal)Nominal air temperature entering the rear door heat exchanger
Modelica.Units.SI.MassFlowRatemReaDoo_flow_nominal (from AirRearDoorHexPassive)(PAir_nominal + datAir.PFan_nominal)/((TReaDooCooOut_nominal - TReaDooCooIn_nominal)*Buildings.Utilities.Psychrometrics.Constants.cpWatLiq)Nominal mass flow rate for rear door heat exchanger at design conditions
Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.Data.Passive.GenericdatReaDooHex (from AirRearDoorHexPassive)
Buildings.Fluid.DataCenters.Racks.Hybrid.Data.AirRearDoorHexPassive.Genericdat (from AirRearDoorHexPassive)

Components

TypeNameDefaultDescription
Buildings.Controls.OBC.CDL.Reals.Sources.ConstantutiAir (from AirRearDoorHexPassive)Utilization of air-cooled hardware
Modelica.Blocks.Math.GainPITAir (from AirRearDoorHexPassive)Power consumption by the air-cooled IT equipment
Buildings.Fluid.DataCenters.Racks.Hybrid.AirRearDoorHexPassiverac (from AirRearDoorHexPassive)
Buildings.Fluid.Sources.Boundary_pTdatHal (from AirRearDoorHexPassive)Temperature and pressure of air in data hall
Fluid.Sensors.TemperatureTwoPortsenTAir_a (from AirRearDoorHexPassive)Air inlet temperature
Fluid.Sensors.TemperatureTwoPortsenTAir_b (from AirRearDoorHexPassive)Air outlet temperature
Buildings.Fluid.Sources.Boundary_pTsouReaDoo (from AirRearDoorHexPassive)Rear door heat exchanger coolant supply at elevated pressure
Sources.Boundary_pTsinReaDoo (from AirRearDoorHexPassive)Sink rear door heat exchanger coolant
Sensors.TemperatureTwoPortsenTReaDooLvg (from AirRearDoorHexPassive)Coolant outlet temperature from rear door heat exchanger

Revisions

  • September 29, 2026, by Michael Wetter:
    First implementation.