Buildings.Rooms.Constructions.BaseClasses

Information

This package contains base classes that are used to construct the models in Buildings.Rooms.Constructions.

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

Package Content

Name	Description
PartialConstruction	Partial model for exterior construction that has no window

Buildings.Rooms.Constructions.BaseClasses.PartialConstruction

Information

This is the base class that is used to model opaque constructions in the room model.

The surface azimuth is defined in Buildings.HeatTransfer.Types.Azimuth and the surface tilt is defined in Buildings.HeatTransfer.Types.Tilt

Parameters

Type	Name	Default	Description
Area	A		Heat transfer area [m2]
Angle	til		Surface tilt [rad]
Opaque construction
Area	AOpa		Heat transfer area of opaque construction [m2]
Generic	layers	redeclare parameter Building...	Material properties of opaque construction
Initialization
Boolean	steadyStateInitial	false	=true initializes dT(0)/dt=0, false initializes T(0) at fixed temperature using T_a_start and T_b_start
Temperature	T_a_start	293.15	Initial temperature at port_a, used if steadyStateInitial = false [K]
Temperature	T_b_start	293.15	Initial temperature at port_b, used if steadyStateInitial = false [K]

Connectors

Type	Name	Description
HeatPort_a	opa_a	Heat port at surface a of opaque construction
HeatPort_b	opa_b	Heat port at surface b of opaque construction

Modelica definition

partial model PartialConstruction 
  "Partial model for exterior construction that has no window"

  parameter Modelica.SIunits.Area A "Heat transfer area";
  parameter Modelica.SIunits.Area AOpa 
    "Heat transfer area of opaque construction";

  replaceable parameter Buildings.HeatTransfer.Data.OpaqueConstructions.Generic
    layers "Material properties of opaque construction";

  parameter Modelica.SIunits.Angle til "Surface tilt";

  final parameter Boolean isFloor=til > 2.74889125 and til < 3.53428875 
    "Flag, true if construction is a floor";
  final parameter Boolean isCeiling=til > -0.392699 and til < 0.392699 
    "Flag, true if construction is a floor";
public 
  Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a opa_a 
    "Heat port at surface a of opaque construction";
  Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_b opa_b 
    "Heat port at surface b of opaque construction";

  final parameter Integer nLay(min=1, fixed=true) = layers.nLay 
    "Number of layers";
  final parameter Integer nSta[nLay](min=1)={layers.material[i].nSta for i in 1:nLay} 
    "Number of states";
  parameter Boolean steadyStateInitial=false 
    "=true initializes dT(0)/dt=0, false initializes T(0) at fixed temperature using T_a_start and T_b_start";
  parameter Modelica.SIunits.Temperature T_a_start=293.15 
    "Initial temperature at port_a, used if steadyStateInitial = false";
  parameter Modelica.SIunits.Temperature T_b_start=293.15 
    "Initial temperature at port_b, used if steadyStateInitial = false";

public 
  HeatTransfer.Conduction.MultiLayer opa(
    final A=AOpa,
    final layers=layers,
    final steadyStateInitial=steadyStateInitial,
    final T_a_start=T_a_start,
    final T_b_start=T_b_start) 
    "Model for heat transfer through opaque construction";

equation 
  connect(opa.port_a, opa_a);
  connect(opa.port_b, opa_b);
end PartialConstruction;