Buildings.HeatTransfer.Data.SolidsPCM

Information

Package with records for solid materials with embedded phase change material. The material is characterized by its thermal conductivity, mass density and specific heat capacity, as well as the solidus and liquidus temperatures, and the latent heat.

For a description of the parameter nStaRef, which is used to generate the spatial grid, see the documentation of the package Buildings.HeatTransfer.Data.Solids.

Package Content

Name	Description
Generic	Thermal properties of solids with heat storage
PCM020	Wallboard with 20% of microencapsulated paraffin
PCM030	Wallboard with 30% of microencapsulated paraffin
MicronalSmartBoard23	Micronal PCM SmartBoard 23
MicronalSmartBoard26	Micronal PCM SmartBoard 26

Buildings.HeatTransfer.Data.SolidsPCM.Generic

Information

Generic record for phase change materials. The record extends from Buildings.HeatTransfer.Data.BaseClasses.Material and declares parameters and constants for phase change materials.

Parameters

Type	Name	Default	Description
Length	x		Material thickness [m]
ThermalConductivity	k		Thermal conductivity [W/(m.K)]
SpecificHeatCapacity	c		Specific heat capacity [J/(kg.K)]
Density	d		Mass density [kg/m3]
Real	R	x/k	Thermal resistance of a unit area of material [m2.K/W]
Integer	nStaRef	3	Number of state variables in a reference material of 0.2 m concrete
Boolean	steadyState	(c == 0 or d == 0)	Flag, if true, then material is computed using steady-state heat conduction
Properties for phase change material
Temperature	TSol		Solidus temperature, used only for PCM. [K]
Temperature	TLiq		Liquidus temperature, used only for PCM [K]
SpecificInternalEnergy	LHea		Latent heat of phase change [J/kg]
Advanced
Integer	nSta	max(1, integer(ceil(nStaReal...	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 solids with heat storage"
    extends Buildings.HeatTransfer.Data.BaseClasses.Material(final R=x/k,
                                                             final phasechange=true);


end Generic;

Buildings.HeatTransfer.Data.SolidsPCM.PCM020

Information

This material record is for PCM treated wallboard. The data source is Feustel (1995).

References

Feustel, Helmut E. Simplified numerical description of latent storage characteristics for phase change wallboard. LBNL-Technical Report 36933. 1995. DOI: 10.2172/70723.

Parameters

Type	Name	Default	Description
Length	x		Material thickness [m]
ThermalConductivity	k	0.204	Thermal conductivity [W/(m.K)]
SpecificHeatCapacity	c	1341	Specific heat capacity [J/(kg.K)]
Density	d	800	Mass density [kg/m3]
Integer	nStaRef	3	Number of state variables in a reference material of 0.2 m concrete
Boolean	steadyState	(c == 0 or d == 0)	Flag, if true, then material is computed using steady-state heat conduction
Properties for phase change material
Temperature	TSol	273.15 + 23	Solidus temperature, used only for PCM. [K]
Temperature	TLiq	273.15 + 27	Liquidus temperature, used only for PCM [K]
SpecificInternalEnergy	LHea	38900	Latent heat of phase change [J/kg]
Advanced
Integer	nSta	max(1, integer(ceil(nStaReal...	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 PCM020 =Buildings.HeatTransfer.Data.SolidsPCM.Generic (
    k=0.204,
    d=800,
    c=1341,
    TSol=273.15+23,
    TLiq=273.15+27,
    LHea=38900) "Wallboard with 20% of microencapsulated paraffin";

Buildings.HeatTransfer.Data.SolidsPCM.PCM030

Information

This material record is for PCM treated wallboard. The data source is Feustel (1995).

References

Feustel, Helmut E. Simplified numerical description of latent storage characteristics for phase change wallboard. LBNL-Technical Report 36933. 1995. DOI: 10.2172/70723.

Parameters

Type	Name	Default	Description
Length	x		Material thickness [m]
ThermalConductivity	k	0.232	Thermal conductivity [W/(m.K)]
SpecificHeatCapacity	c	1467	Specific heat capacity [J/(kg.K)]
Density	d	998	Mass density [kg/m3]
Integer	nStaRef	3	Number of state variables in a reference material of 0.2 m concrete
Boolean	steadyState	(c == 0 or d == 0)	Flag, if true, then material is computed using steady-state heat conduction
Properties for phase change material
Temperature	TSol	273.15 + 24	Solidus temperature, used only for PCM. [K]
Temperature	TLiq	273.15 + 26	Liquidus temperature, used only for PCM [K]
SpecificInternalEnergy	LHea	58300	Latent heat of phase change [J/kg]
Advanced
Integer	nSta	max(1, integer(ceil(nStaReal...	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 PCM030 =Buildings.HeatTransfer.Data.SolidsPCM.Generic (
    k=0.232,
    d=998,
    c=1467,
    TSol=273.15+24,
    TLiq=273.15+26,
    LHea=58300) "Wallboard with 30% of microencapsulated paraffin";

Buildings.HeatTransfer.Data.SolidsPCM.MicronalSmartBoard23

Parameters

Type	Name	Default	Description
Length	x		Material thickness [m]
ThermalConductivity	k	0.18	Thermal conductivity [W/(m.K)]
SpecificHeatCapacity	c	1200	Specific heat capacity [J/(kg.K)]
Density	d	767	Mass density [kg/m3]
Integer	nStaRef	3	Number of state variables in a reference material of 0.2 m concrete
Boolean	steadyState	(c == 0 or d == 0)	Flag, if true, then material is computed using steady-state heat conduction
Properties for phase change material
Temperature	TSol	273.15 + 22.99	Solidus temperature, used only for PCM. [K]
Temperature	TLiq	273.15 + 23.01	Liquidus temperature, used only for PCM [K]
SpecificInternalEnergy	LHea	28696	Latent heat of phase change [J/kg]
Advanced
Integer	nSta	max(1, integer(ceil(nStaReal...	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 MicronalSmartBoard23 =
                      Buildings.HeatTransfer.Data.SolidsPCM.Generic (
    k=0.18,
    d=767,
    c=1200,
    TSol=273.15+22.99,
    TLiq=273.15+23.01,
    LHea=28696) "Micronal PCM SmartBoard 23";

Buildings.HeatTransfer.Data.SolidsPCM.MicronalSmartBoard26

Parameters

Type	Name	Default	Description
Length	x		Material thickness [m]
ThermalConductivity	k	0.18	Thermal conductivity [W/(m.K)]
SpecificHeatCapacity	c	1200	Specific heat capacity [J/(kg.K)]
Density	d	767	Mass density [kg/m3]
Integer	nStaRef	3	Number of state variables in a reference material of 0.2 m concrete
Boolean	steadyState	(c == 0 or d == 0)	Flag, if true, then material is computed using steady-state heat conduction
Properties for phase change material
Temperature	TSol	273.15 + 25.99	Solidus temperature, used only for PCM. [K]
Temperature	TLiq	273.15 + 26.01	Liquidus temperature, used only for PCM [K]
SpecificInternalEnergy	LHea	28696	Latent heat of phase change [J/kg]
Advanced
Integer	nSta	max(1, integer(ceil(nStaReal...	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 MicronalSmartBoard26 =
                      Buildings.HeatTransfer.Data.SolidsPCM.Generic (
    k=0.18,
    d=767,
    c=1200,
    TSol=273.15+25.99,
    TLiq=273.15+26.01,
    LHea=28696) "Micronal PCM SmartBoard 26";