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Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.Data.Active

Data records for active rear door heat exchangers

Information

This package contains data records for active rear door heat exchangers. In an active rear door heat exchanger, an integrated fan drives airflow through the heat exchanger independently of the server fans inside the rack.

Extends from Modelica.Icons.MaterialPropertiesPackage (Icon for package containing property classes).

Package Content

Name Description
Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.Data.Active.Generic Generic Data record for active rear door heat exchanger

Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.Data.Active.Generic Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.Data.Active.Generic

Data record for active rear door heat exchanger

Information

Data record for an active rear door heat exchanger used in IT rack models.

This record extends Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.Data.Passive.Generic and adds performance data for the fans.

Extends from Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.Data.Passive.Generic (Data record for passive rear door heat exchanger).

Contents

TypeNameDefaultDescription
SpecificHeatCapacitycpCoo_nominalBuildings.Media.Water.cp_constSpecific heat capacity of rear door heat exchanger coolant fluid [J/(kg.K)]
SpecificHeatCapacitycpAir_nominalBuildings.Utilities.Psychrom...Specific heat capacity of air [J/(kg.K)]
Nominal condition
MassFlowRatemAir_flow_nominal Design air mass flow rate for heat exchanger [kg/s]
MassFlowRatemCoo_flow_nominal Design coolant flow rate for heat exchanger parameterization [kg/s]
HeatFlowRateQ_flow_nominal Cooling capacity at design condition (negative number) [W]
TemperatureTAirIn_nominal Air inlet nominal temperature (air entering rear door heat exchanger) [K]
TemperatureTCooIn_nominal Rear door coolant inlet nominal temperature [K]
PressureDifferencedpCoo_nominal10000Coolant-side pressure drop at nominal flow rate [Pa]
PressureDifferencedpAir_nominal200Air-side pressure drop at nominal flow rate [Pa]
Fan power
PowerPFan_nominalmAir_flow_nominal*dpAir_nomi...Fan power at full speed [W]
Fan
Realeta_nominal0.7Fan and motor combined efficiency at nominal conditions [1]

Modelica definition

record Generic "Data record for active rear door heat exchanger" extends Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.Data.Passive.Generic; parameter Modelica.Units.SI.Power PFan_nominal(final min=0)=mAir_flow_nominal*dpAir_nominal/eta_nominal/Buildings.Media.Air.dStp "Fan power at full speed"; parameter Real eta_nominal( final unit="1", final min=Modelica.Constants.small) = 0.7 "Fan and motor combined efficiency at nominal conditions"; end Generic;