modelShellSide_STHX
Shell and Tube HX | Shell Side (use straight geometry for tube side): Shell side of a heat exchanger with correction for unequal overall tube and shell lengths
Extends from StraightPipe.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | nTubes | 1 | Number of parallel tubes |
| Integer | figure (from GenericPipe) | 1 | Index for Icon figure |
| Integer | nV (from GenericPipe) | 1 | Number of volume nodes |
| Integer | nSurfaces (from GenericPipe) | 1 | Number of transfer (heat/mass) surfaces |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Length | length_shell | 1.0 | Overall shell side length |
| SI.Diameter | D_o_shell | 4*crossAreaEmpty_shell/perimeterEmpty_shell | Outer diameter of shell |
| SI.Diameter | D_i_shell | 0 | Inner diameter of shell |
| SI.Area | crossAreaEmpty_shell | 0.25*pi*(D_o_shell^2 - D_i_shell^2) | Cross-sectional area of an empty shell (i.e., no tubes) |
| SI.Length | perimeterEmpty_shell | pi*(D_o_shell + D_i_shell) | Wetted perimeter of an empty shell (i.e., no tubes) |
| SI.Area | surfaceArea_shell | pi*D_o_tube*length_tube*nTubes | Heat Transfer surface area |
| SI.Length | dimension (from StraightPipe) | 4*crossArea/perimeter | Characteristic dimension (e.g., hydraulic diameter) |
| SI.Area | crossArea (from StraightPipe) | pi*dimension*dimension/4 | Cross-sectional flow areas |
| SI.Length | perimeter (from StraightPipe) | 4*crossArea/dimension | Wetted perimeters |
| SI.Length | length (from StraightPipe) | 1.0 | Pipe length |
| SI.Height | roughness (from StraightPipe) | 2.5e-5 | Average heights of surface asperities |
| SI.Area[nSurfaces] | surfaceArea (from StraightPipe) | {perimeter*length} | Area per transfer surface |
| SI.Angle | angle (from StraightPipe) | 0.0 | Vertical angle from the horizontal (-pi/2 < x <= pi/2) |
| SI.Length | dheight (from StraightPipe) | length*sin(angle) | Height(port_b) - Height(port_a) distributed by flow segment |
| SI.Length[nV] | dimensions (from GenericPipe) | 4*crossAreas./perimeters | Characteristic dimension (e.g., hydraulic diameter) |
| SI.Area[nV] | crossAreas (from GenericPipe) | pi*dimensions.*dimensions./4 | Cross sectional area of unit volumes |
| SI.Length[nV] | perimeters (from GenericPipe) | 4*crossAreas./dimensions | Wetted perimeter of unit volumes |
| SI.Length[nV] | dlengths (from GenericPipe) | ones(nV) | Unit cell length |
| SI.Height | roughnesses (from GenericPipe) | fill(2.5e-5, nV) | Average heights of surface asperities |
| SI.Area[nV,nSurfaces] | surfaceAreas (from GenericPipe) | [perimeters.*dlengths] | Discretized area per transfer surface |
| SI.Angle | angles (from GenericPipe) | fill(0, nV) | Vertical angle from the horizontal (-pi/2 <= x <= pi/2) |
| SI.Length | dheights (from GenericPipe) | dlengths.*sin(angles) | Height(port_b) - Height(port_a) |
| SI.Length | height_a (from GenericPipe) | 0 | Elevation at port_a: Reference value only. No impact on calculations. |
| SI.Length | height_b (from GenericPipe) | height_a + sum(dheights) | Elevation at port_b: Reference value only. No impact on calculations. |
| SI.Volume[nV] | Vs (from GenericPipe) | crossAreas.*dlengths | Unit volumes |
| SI.Volume | V_total (from GenericPipe) | sum(Vs) | Total volume of component |
| SI.Area[nV] | surfaceAreas_nVtotal (from GenericPipe) | {sum(surfaceAreas[1, :]) for i in 1:nV} | Total surface area for each volume node |
| SI.Area | surfaceArea_total (from GenericPipe) | sum(surfaceAreas_nVtotal) | Total surface area |
| Real[nV] | dxs (from GenericPipe) | dlengths/sum(dlengths) | Fractional lengths |
| SI.Length | length_tube | Overall tube side length | |
| SI.Length | D_o_tube | Outer diameter of tubes | |
| Units.NonDim | lengthRatio | length_tube/length_shell | Ratio of tube length to shell length |
| SI.Area | crossAreaWithLratio_tube | 0.25*pi*D_o_tube*D_o_tube*nTubes*lengthRatio | Estimate of cross sectional area of tubes (exact if tubes are circular) with an unequal shell-tube length factor correction |
| SI.Length | perimeterWithLratio_tube | pi*D_o_tube*nTubes*lengthRatio | Wetted perimeter of tubes in shell with an unequal shell-tube length factor correction |
| SI.Area | crossArea_shell | crossAreaEmpty_shell - crossAreaWithLratio_tube | Cross-sectional flow area of shell |
| SI.Length | perimeter_shell | perimeterEmpty_shell + perimeterWithLratio_tube | Wetted perimeter of shell |