modelHollowCylinderWithTubes
Extends from ClaRa.Basics.ControlVolumes.Fundamentals.Geometry.ShellWithTubes (geometry definition for a shell with tubes inside), ClaRa.Basics.ControlVolumes.Fundamentals.Geometry.GenericGeometry (All shapes || Base class).
Information
For detailed model documentation please consult the html-documentation shipped with ClaRa.
Authorship and Copyright Statement for original (initial) Contribution
Author:
DYNCAP/DYNSTART development team, Copyright © 2011-2024.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 |
|---|---|---|---|
| Integer | N_heat (from GenericGeometry) | 2 | No. of heat transfer areas |
| Real | MIN | 1e-5 | Limiter |
| Boolean | staggeredAlignment | true | True, if the tubes are aligned staggeredly, false otherwise |
| Real | fa | if staggeredAlignment then (1 + (if b > 0 then 2/3/b else 0)) else (1 + (if b > 0 then 0.7/max(MIN, psi)^1.5*(b/a - 0.3)/(b/a + 0.7)^2 else 0)) | Alignment factor |
| Essential Geometry Definition | |||
| Units.Volume | volume (from GenericGeometry) | 1 | Volume of the component |
| Units.Area[N_heat] | A_heat (from GenericGeometry) | ones(N_heat) | Heat transfer area: /1/ dedicated to lateral surface |
| Units.Area[N_heat] | A_heat_CF (from GenericGeometry) | {A_heat[i]*CF_geo[i] for i in 1:N_heat} | Corrected heat transfer area: /1/ dedicated to lateral surface |
| Real[N_heat] | CF_geo (from GenericGeometry) | ones(N_heat) | Correction factor for heat transfer area: /1/ dedicated to lateral surface |
| Units.Area | A_cross (from GenericGeometry) | 1 | Cross section for mass flow |
| Units.Area | A_front (from GenericGeometry) | 1 | Frontal area |
| Units.Area | A_hor (from GenericGeometry) | 1 | Nominal horizonal area |
| Integer | N_inlet (from GenericGeometry) | 1 | Number of inlet ports |
| Integer | N_outlet (from GenericGeometry) | 1 | Number of outlet ports |
| Units.Length[N_inlet] | z_in (from GenericGeometry) | ones(N_inlet) | Height of inlet ports |
| Units.Length[N_outlet] | z_out (from GenericGeometry) | ones(N_outlet) | Height of outlet ports |
| Units.Length | height_fill (from GenericGeometry) | 1 | Fillable height of component |
| Real[:,2] | shape (from GenericGeometry) | [0, 1; 1, 1] | Shape factor, i.e. A_horitontal=A_hor*interp(shape, relLevel) |
| ClaRa.Basics.Choices.GeometryOrientation | orientation | ClaRa.Basics.Choices.GeometryOrientation.horizontal | Orientation of the component |
| ClaRa.Basics.Choices.GeometryOrientation | flowOrientation | ClaRa.Basics.Choices.GeometryOrientation.vertical | Orientation of the mass flow |
| Units.Length | length | 1 | Length of the component |
| General › Essential Geometry Definition | |||
| Units.Length | diameter | 1 | Diameter of the component |
| General › Interior Equipment | |||
| Units.Length | diameter_t | 0.1 | Outer diameter of internal tubes |
| Interior Equipment | |||
| Units.Length | length_tubes | 1 | Length of the internal tubes (single pass) |
| Integer | N_tubes | 1 | Number of internal tubes |
| Integer | N_passes | 1 | Number of passes of the internal tubes |
| Boolean | parallelTubes | false | True, if tubes are parallel to main flow orientation, else false |
| Integer | N_baffle | 0 | Number of baffles on shell side |
| Real | interior | volume/(pi/4*diameter^2*length) | Volume fraction of interior equipment |
| Modelica.Units.SI.Length | Delta_z_ort | 2*diameter_t | Distance between tubes orthogonal to flow direction (center to center) |
| Modelica.Units.SI.Length | Delta_z_par | 2*diameter_t | Distance between tubes parallel to flow direction (center to center) |
| Real | a | Delta_z_ort/diameter_t | Lateral alignment ratio |
| Real | b | Delta_z_par/diameter_t | Vertical alignment ratio |
| Real | psi | if b >= 1 or b <= 0 then 1 - Modelica.Constants.pi/4/a else 1 - Modelica.Constants.pi/4/a/b | Void ratio |
| Integer | N_rows | integer(ceil(sqrt(N_tubes))*N_passes) | Number of pipe rows in flow direction (minimum = N_passes) |
Revisions
For revisions please consult the html-documentation shipped with ClaRa.