modelPassive
Extends from Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.BaseClasses.PartialRearDoorHeatExchanger (Partial model of a rear door heat exchanger with coolant and air ports).
Information
Model of a passive rear door heat exchanger (RDHx) for IT racks.
In this configuration, the server fans inside the rack drive the warm exhaust air through the heat exchanger mounted at the rear door. No dedicated fan is added; the air-side pressure drop is overcome by the server fans.
The liquid coolant enters through portCoo_a and exits through
portCoo_b. The air enters through portAir_a (warm server
exhaust) and exits through portAir_b (cooled air leaving the rack).
The performance data are provided through the record dat of type
Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.Data.Passive.Generic.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Assumptions | |||
| Boolean | allowFlowReversalCoo (from PartialRearDoorHeatExchanger) | true | = false to simplify equations on coolant side, assuming, but not enforcing, no flow reversal |
| Boolean | allowFlowReversalAir (from PartialRearDoorHeatExchanger) | true | = false to simplify equations on air side, assuming, but not enforcing, no flow reversal |
| Nominal condition | |||
| Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.Data.Passive.Generic | dat (from PartialRearDoorHeatExchanger) | Heat exchanger performance data | |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Fluid.Interfaces.FluidPort_a | portCoo_a (from PartialRearDoorHeatExchanger) | Coolant inlet port | |
| Modelica.Fluid.Interfaces.FluidPort_b | portCoo_b (from PartialRearDoorHeatExchanger) | Coolant outlet port | |
| Modelica.Fluid.Interfaces.FluidPort_a | portAir_a (from PartialRearDoorHeatExchanger) | Air inlet port | |
| Modelica.Fluid.Interfaces.FluidPort_b | portAir_b (from PartialRearDoorHeatExchanger) | Air outlet port |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Fluid.HeatExchangers.DryCoilEffectivenessNTU | reaDooHex (from PartialRearDoorHeatExchanger) | Rear door heat exchanger | |
| Sensors.TemperatureTwoPort | senTAirReaDooHexIn (from PartialRearDoorHeatExchanger) | Air temperature entering rear door heat exchanger |
Revisions
-
September 18, 2026, by Michael Wetter:
First implementation.