recordGeneric
Generic data record for air cooled rack
Extends from Buildings.Fluid.DataCenters.Racks.BaseClasses.Data.Generic (Generic data record for IT rack).
Information
Generic data record for air-cooled IT rack.
The fan power consumption at full IT utilization is by default set to 4% of the IT load.
This setting can be changed through the parameter PFan_nominal.
The parameter fanRelPow describes the normalized fan power consumption based
on the normalized fan volume flow rate. By default, this is set to a cubic curve.
The parameters TAirIn_nominal and TAirOut_nominal are used,
together with PFan_nominal, to size the fan.
The outlet temperature is also used as the set point for the air temperature raise across the rack,
if this control option is selected for the rack.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Temperature | TIn_nominal | 303.15 | Rack design inlet air temperature |
| Modelica.Units.SI.Temperature | TOut_nominal | 313.15 | Rack design outlet air temperature |
| Modelica.Units.SI.SpecificHeatCapacity | cpAir_nominal | Buildings.Utilities.Psychrometrics.Constants.cpAir | Specific heat capacity of air |
| Nominal condition | |||
| Modelica.Units.SI.HeatFlowRate | PIT_nominal (from Generic) | IT power consumption at u=1, also called Thermal Design Power (TDP) | |
| Modelica.Units.SI.MassFlowRate | m_flow_nominal (from Generic) | Nominal mass flow rate | |
| Fan | |||
| Modelica.Units.SI.Power | PFan_nominal | 0.04*PIT_nominal | Fan power at full IT load PIT_nominal |
| Real | eta_nominal | 0.7 | Fan and motor combined efficiency at nominal conditions |
Revisions
-
June 26, 2026, by Michael Wetter:
First implementation.