modelNTU_L3_standalone

A three-zonal NTU cell model with internally calculated zone size

Extends from ClaRa.Basics.Icons.NTU, ClaRa.Basics.Icons.ComplexityLevel (Displays the complexity level inside model icon ).

Information

For detailed model documentation please consult the html-documentation shipped with ClaRa.

Authorship and Copyright Statement for original (initial) Contribution

Author:

References:

For references please consult the html-documentation shipped with ClaRa.

Remarks:

This component was developed by ClaRa development team under the 3-clause BSD License.

Acknowledgements:

ClaRa originated from the collaborative research projects DYNCAP and DYNSTART. Both research projects were supported by the German Federal Ministry for Economic Affairs and Energy (FKZ 03ET2009 and FKZ 03ET7060).

CLA:

The author(s) have agreed to ClaRa CLA, version 1.0. See https://claralib.com/pdf/CLA.pdf

By agreeing to ClaRa CLA, version 1.0 the author has granted the ClaRa development team a permanent right to use and modify his initial contribution as well as to publish it or its modified versions under the 3-clause BSD License.

The ClaRa development team consists of the following partners:

TLK-Thermo GmbH (Braunschweig, Germany)

XRG Simulation GmbH (Hamburg, Germany).

Parameters

Type	Name	Default	Description
Modelica.Units.SI.ThermalResistance	HR_nom	nTU.HR_nom	Nominal conductive heat resistance
Fundamental Definitions
TILMedia.VLEFluid.Types.BaseVLEFluid	medium_shell	simCenter.fluid1	Medium of shell side
TILMedia.VLEFluid.Types.BaseVLEFluid	medium_tubes	simCenter.fluid1	Medium of tubes side
Boolean	outerPhaseChange	true	True, if phase change may occur at outer side
Geometry
Integer	N_t	1	Number of tubes in one pass
Integer	N_p	1	Number of passes
Units.Length	length		Tube length (for one pass)
Units.Length	radius_i		Inner radius of tube
Units.Length	radius_o		Outer radius of tube
Real	mass_struc	0	Mass of inner structure elements, additional to the tubes itself
Real	CF_geo	1	Correction coefficient due to fins etc.
Initialisation
Integer	initOption	0	Thermal initialisation
Units.Temperature[3]	T_w_i_start	ones(3)*293.15	Initial temperature at inner phase
Units.Temperature[3]	T_w_o_start	ones(3)*293.15	Initial temperature at outer phase
Integer	initOption_yps	3	Volumetric initialisation
Real[2]	yps_start	{0, 0}	Initial area fraction 1phase \| 2phase
Expert Settings
Real	gain_eff	1	Avoid effectiveness > 1, high gain_eff leads to stricter observation but may cause numeric errors
SI.Time	Tau_stab	0.1	Time constant for numeric stabilisation w.r.t. heat flow rates
Boolean	showExpertSummary	false	True,if expert summaries shall be shown

Connectors

Type	Name	Default	Description
ClaRa.Basics.Interfaces.HeatPort_a[3]	outerPhase		outer side of cylinder
ClaRa.Basics.Interfaces.HeatPort_a[3]	innerPhase		inner side of cylinder

Components

Type	Name	Default	Description
ClaRa.SimCenter	simCenter
String	complexity (from ComplexityLevel)	"??"
Units.Pressure	p_o		Pressure at outer side
Units.Pressure	p_i		Pressure at inner side
Units.EnthalpyMassSpecific	h_i_inlet		Inlet enthalpy of inner flow
Units.EnthalpyMassSpecific	h_o_inlet		Inlet enthalpy of outer flow
Units.MassFlowRate	m_flow_i		Mass flow rate of inner side
Units.MassFlowRate	m_flow_o		Mass flow rate of outer side
ClaRa.Basics.Units.MassFraction[medium_tubes.nc - 1]	xi_i		Mass fraction at outer side
ClaRa.Basics.Units.MassFraction[medium_shell.nc - 1]	xi_o		Mass fraction at outer side
Units.CoefficientOfHeatTransfer[3]	alpha_i		Coefficient of heatTransfer for inner side for regions \|A\|B\|C\|
Units.CoefficientOfHeatTransfer[3]	alpha_o		Coefficient of heatTransfer for outer side for regions \|A\|B\|C\|
Summary	summary

Name	Description
Material
HeatExchangerType
HeatCapacityAveraging
Summary
ECom

Revisions

For revisions please consult the html-documentation shipped with ClaRa.