Buildings.Examples.ChillerPlant.BaseClasses

Information

This package contains base classes that are used to construct the models in Buildings.Examples.ChillerPlant.

Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).

Package Content

Name	Description
SimplifiedRoom	Simplified data center room
Controls	Package with control components for Buildings.Examples.ChillerPlant

Buildings.Examples.ChillerPlant.BaseClasses.SimplifiedRoom

Information

This is a simplified room model for a data center. There is no heat exchange between the room and ambient environment through the building envelope since it is negligible compared to the heat released by the servers.

Parameters

Type	Name	Default	Description
replaceable package Medium		Modelica.Media.Interfaces.Pa...	Medium model
Length	rooLen		Length of the room [m]
Length	rooWid		Width of the room [m]
Height	rooHei		Height of the room [m]
Power	QRoo_flow		Heat generation of the computer room [W]
MassFlowRate	m_flow_nominal		Nominal mass flow rate [kg/s]

Connectors

Type	Name	Description
replaceable package Medium		Medium model
VesselFluidPorts_b	airPorts[nPorts]	Fluid inlets and outlets

Modelica definition

model SimplifiedRoom "Simplified data center room"
  replaceable package Medium = Modelica.Media.Interfaces.PartialMedium 
    "Medium model";
  parameter Integer nPorts=0 "Number of parts";
  parameter Modelica.SIunits.Length rooLen "Length of the room";
  parameter Modelica.SIunits.Length rooWid "Width of the room";
  parameter Modelica.SIunits.Height rooHei "Height of the room";
  parameter Modelica.SIunits.Power QRoo_flow 
    "Heat generation of the computer room";

  Buildings.Fluid.MixingVolumes.MixingVolume rooVol(
    nPorts=nPorts,
    redeclare each package Medium = Medium,
    V=rooLen*rooWid*rooHei,
    final T_start=293.15,
    m_flow_nominal=m_flow_nominal) "Volume of air in the room";
  Modelica.Fluid.Vessels.BaseClasses.VesselFluidPorts_b airPorts[nPorts](
      redeclare each package Medium = Medium) "Fluid inlets and outlets";
  Modelica.Thermal.HeatTransfer.Sources.PrescribedHeatFlow QSou 
    "Heat source of the room";
  Modelica.Blocks.Sources.Ramp ramp(
    height=QRoo_flow,
    offset=0,
    duration=36000,
    startTime=0);
  parameter Modelica.SIunits.MassFlowRate m_flow_nominal 
    "Nominal mass flow rate";
equation 
  connect(rooVol.ports, airPorts);
  connect(QSou.port, rooVol.heatPort);
  connect(ramp.y, QSou.Q_flow);
end SimplifiedRoom;