modelPartialAirRearDoorHex

Partial model for air-cooled rack with a rear door heat exchanger

Extends from Buildings.Fluid.DataCenters.Racks.Hybrid.BaseClasses.Air (Partial rack model for air-cooled components).

Information

Partial model of an air-cooled IT rack with a rear door heat exchanger.

This model extends Buildings.Fluid.DataCenters.Racks.Hybrid.BaseClasses.Air and adds a partial model for a rear door heat exchanger.

Type	Name	Default	Description
Performance data
Buildings.Fluid.DataCenters.Racks.Hybrid.Data.AirRearDoorHexPassive.Generic	dat (from Air)		Performance data
Dynamics › Air cooling
Modelica.Fluid.Types.Dynamics	energyDynamicsAir (from Air)	Modelica.Fluid.Types.Dynamics.DynamicFreeInitial	Type of energy balance for air-cooled component: dynamic (3 initialization options) or steady state
Modelica.Units.SI.Time	tauAir (from Air)	2	Time constant of air outlet temperature at nominal flow
Initialization › Air cooling
Modelica.Units.SI.Temperature	TAir_start (from Air)	293.15	Start value of air temperature
Fan controller
Buildings.Fluid.DataCenters.Racks.FanControllers.Types.Strategy	fanControl (from Air)	Buildings.Fluid.DataCenters.Racks.FanControllers.Types.Strategy.Load	Type of fan control strategy
Real[:,:]	fanSpeed (from Air)	[0.0, 0.0; 1.0, 1.0]	Load and fan speed matrix (1st column normalized IT load, 2nd fan speed), e.g., fanSpeed=[0, 0; 0.5, 0.7; 1, 1])
Modelica.Units.SI.Temperature	TAirOut_set (from Air)	dat.air.TOut_nominal	Set point temperature for rack outlet air
Real	k (from Air)	1	Gain of fan PI controller
Modelica.Units.SI.Time	Ti (from Air)	60	Integrator time constant of fan PI controller
Assumptions
Boolean	allowFlowReversal (from Air)	true	= false to simplify equations, assuming, but not enforcing, no flow reversal
Boolean	allowFlowReversalCoo	true	= false to simplify equations, assuming, but not enforcing, no flow reversal for rear door heat exchanger coolant

Type	Name	Description
Modelica.Fluid.Interfaces.FluidPort_a	portAir_a (from Air)	Air cooling inlet port
Modelica.Fluid.Interfaces.FluidPort_b	portAir_b (from Air)	Air cooling outlet port
Modelica.Blocks.Interfaces.RealInput	PAir (from Air)	Power consumed by air-cooled IT
Modelica.Blocks.Interfaces.RealOutput	PAirTot (from Air)	Electric power consumed by air-cooled IT, including fan energy
Modelica.Blocks.Interfaces.RealOutput	PAirFan (from Air)	Electric power consumed by fan for air-cooled IT
Modelica.Fluid.Interfaces.FluidPort_a	portReaDooHex_a	Rear door heat exchanger coolant inlet port
Modelica.Fluid.Interfaces.FluidPort_b	portReaDooHex_b	Rear door heat exchanger coolant outlet port

Type	Name	Default	Description
Buildings.Fluid.DataCenters.Racks.Air.Rack_P	air (from Air)		Air-cooled rack component
Buildings.Fluid.DataCenters.Racks.RearDoorHeatExchangers.BaseClasses.PartialRearDoorHeatExchanger	reaDooHex

Name	Description
MediumReaDooHex	Medium for rear door heat exchanger coolant loop