Description: "Package with thermal resistances"

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## Buildings.HeatTransfer.Data.Resistances

Package with thermal resistances

### Information

Package with records that implement thermal properties of heat resistances.

Extends from Modelica.Icons.MaterialPropertiesPackage (Icon for package containing property classes).

### Package Content

Name | Description
--- | ---
Generic | Thermal properties of heat resistances
Carpet | Carpet

## Buildings.HeatTransfer.Data.Resistances.Generic

Thermal properties of heat resistances

### Information

Generic record for thermal properties of heat resistances.

Extends from Buildings.HeatTransfer.Data.BaseClasses.Material (Thermal properties of materials w/o storage).

### Parameters

Type | Name | Default | Description
--- | --- | --- | ---
Length | x | 0 | Material thickness [m]
ThermalConductivity | k | 0 | Thermal conductivity [W/(m.K)]
SpecificHeatCapacity | c | 0 | Specific heat capacity [J/(kg.K)]
Density | d | 0 | Mass density [kg/m3]
Real | R |  | Thermal resistance of a unit area of material [m2.K/W]
Integer | nStaRef | 0 | Number of state variables in a reference material of 0.2 m concrete
Boolean | steadyState | true | Flag, if true, then material is computed using steady-state heat conduction
Properties for phase change material
Temperature | TSol | 293.15 | Solidus temperature, used only for PCM. [K]
Temperature | TLiq | 293.15 | Liquidus temperature, used only for PCM [K]
SpecificInternalEnergy | LHea | 0 | Latent heat of phase change [J/kg]
Advanced
Integer | nSta | 1 | Actual number of state variables in material
Real | piRef | 331.4 | Ratio x/sqrt(alpha) for reference material of 0.2 m concrete
Real | piMat | if steadyState then piRef el... | Ratio x/sqrt(alpha)
Real | nStaReal | nStaRef*piMat/piRef | Number of states as a real number

### Modelica definition

record Generic "Thermal properties of heat resistances" extends Buildings.HeatTransfer.Data.BaseClasses.Material( final c=0, final d=0, final k=0, final x=0, final nStaRef=0, final nSta=1, final steadyState=true, final TSol=293.15, final TLiq=293.15, final LHea=0, final phasechange=false); end Generic;

## Buildings.HeatTransfer.Data.Resistances.Carpet

Carpet

### Parameters

Type | Name | Default | Description
--- | --- | --- | ---
Real | R | 0.2165 | Thermal resistance of a unit area of material [m2.K/W]
Advanced
Real | piRef | 331.4 | Ratio x/sqrt(alpha) for reference material of 0.2 m concrete
Real | piMat | if steadyState then piRef el... | Ratio x/sqrt(alpha)
Real | nStaReal | nStaRef*piMat/piRef | Number of states as a real number

### Modelica definition

record Carpet = Buildings.HeatTransfer.Data.Resistances.Generic (R=0.2165) "Carpet";