Results for Study 5
Figure 13: Nitrogen Species Molar Fractions
1
In the Settings window for 2D Plot Group, type Nitrogen Species Molar Fractions in the Label text field.
2
Locate the Data section. From the Dataset list, choose Study 5: Monolith Reactor Model/Parametric Solutions 5 (sol25).
3
From the Cases list, choose Low Load.
4
Click to expand the Title section. From the Title type list, choose None.
5
Locate the Color Legend section. From the Position list, choose Right double.
6
In the Model Builder window, expand the node Nitrogen Species Molar Fractions.
7
In the Model Builder window, under Results > Nitrogen Species Molar Fractions, Ctrl-click to select Surface, H2O, Total Flux, H2O, H2O, Total Flux, NH3, Total Flux, NO, and Total Flux, NO2.
8
Right-click and choose Delete.
Surface, NH3 (SCR)
1
In the Settings window for Surface, type Surface, NH3 (SCR) in the Label text field.
2
Locate the Expression section. In the Expression text field, type yNH3.
3
From the Unit list, choose ppm.
4
Locate the Coloring and Style section. From the Color table list, choose Cynanthus.
5
In the Color legend title text field, type NH<sub>3</sub> (SCR).
6
From the Color table type list, choose Discrete.
7
In the Number of bands text field, type 20.
8
Right-click Surface, NH3 (SCR) and choose Selection.
9
Click the  Zoom Extents button in the Graphics toolbar.
10
Select Domain 5 only.
11
In the Model Builder window, click Surface, NH3 (SCR).
12
In the Settings window for Surface, type Surface, NH3 (SCR) in the Label text field.
Surface, NH3 (ASC)
1
Right-click Surface, NH3 (SCR) and choose Duplicate.
2
In the Settings window for Surface, type Surface, NH3 (ASC) in the Label text field.
3
Locate the Coloring and Style section. In the Color legend title text field, type NH<sub>3</sub> (ASC).
4
In the Model Builder window, expand the Surface, NH3 (ASC) node, then click Selection 1.
5
In the Settings window for Selection, locate the Selection section.
6
Click to select the  Activate Selection toggle button.
7
Select Domain 3 only.
Surface, NO (SCR)
1
In the Model Builder window, under Results > Nitrogen Species Molar Fractions click Surface, NO.
2
In the Settings window for Surface, locate the Expression section.
3
In the Expression text field, type yNO.
4
From the Unit list, choose ppm.
5
Locate the Coloring and Style section. From the Color table list, choose Baptisia.
6
In the Color legend title text field, type NO (SCR).
7
From the Color table type list, choose Discrete.
8
In the Number of bands text field, type 20.
9
In the Model Builder window, click Surface, NO.
10
In the Label text field, type Surface, NO (SCR).
11
Right-click Surface, NO (SCR) and choose Selection.
12
Select Domain 5 only.
Surface, NO (ASC)
1
In the Model Builder window, right-click Surface, NO (SCR) and choose Duplicate.
2
In the Settings window for Surface, type Surface, NO (ASC) in the Label text field.
3
Locate the Coloring and Style section. In the Color legend title text field, type NO (ASC).
4
In the Model Builder window, expand the Surface, NO (ASC) node, then click Selection 1.
5
In the Settings window for Selection, locate the Selection section.
6
Click to select the  Activate Selection toggle button.
7
Select Domain 3 only.
Surface, NO2 (SCR)
1
In the Model Builder window, under Results > Nitrogen Species Molar Fractions click Surface, NO2.
2
In the Settings window for Surface, type Surface, NO2 (SCR) in the Label text field.
3
Locate the Expression section. In the Expression text field, type yNO2.
4
From the Unit list, choose ppm.
5
Locate the Coloring and Style section. From the Color table list, choose Arctium.
6
In the Color legend title text field, type NO<sub>2</sub> (SCR).
7
From the Color table type list, choose Discrete.
8
In the Number of bands text field, type 20.
9
Right-click Surface, NO2 (SCR) and choose Selection.
10
Select Domain 5 only.
Surface, NO2 (ASC)
1
Right-click Surface, NO2 (SCR) and choose Duplicate.
2
In the Settings window for Surface, type Surface, NO2 (ASC) in the Label text field.
3
Locate the Coloring and Style section. In the Color legend title text field, type NO<sub>2</sub> (ASC).
4
In the Model Builder window, under Results > Nitrogen Species Molar Fractions > Surface, NO2 (ASC) click Selection 1.
5
In the Settings window for Selection, locate the Selection section.
6
Click to select the  Activate Selection toggle button.
7
Select Domain 3 only.
8
Click the  Zoom Extents button in the Graphics toolbar.
9
In the Nitrogen Species Molar Fractions toolbar, click  Plot.
NH3
1
In the Model Builder window, click NH3.
2
In the Settings window for Annotation, locate the Annotation section.
3
In the Text field, type NH$_3$.
4
Select the LaTeX markup checkbox.
5
Click to expand the Plot Array section. In the Index text field, type 0.
NO
1
In the Model Builder window, click NO.
2
In the Settings window for Annotation, locate the Annotation section.
3
Click to expand the Plot Array section. In the Index text field, type 1.
NO2
1
In the Model Builder window, click NH3.
2
In the Settings window for Annotation, locate the Annotation section.
3
In the Text field, type NO$_2$.
4
Select the LaTeX markup checkbox.
5
Click to expand the Plot Array section. In the Index text field, type 2.
Nitrogen Species Molar Fractions
Switch between the three cases to see the different results.
1
In the Model Builder window, under Results click Nitrogen Species Molar Fractions.
2
In the Settings window for 2D Plot Group, locate the Data section.
3
From the Cases list, choose Intermediate Load.
4
In the Nitrogen Species Molar Fractions toolbar, click  Plot.
5
From the Cases list, choose High Load.
6
In the Nitrogen Species Molar Fractions toolbar, click  Plot.
The following steps generate Figure 16.
Figure 16: T, U, and dP
1
In the Results toolbar, click  2D Plot Group.
2
In the Settings window for 2D Plot Group, type Drive Cases, ANR = 1.3, T, U, and dP in the Label text field.
3
Locate the Data section. From the Dataset list, choose Study 5: Monolith Reactor Model/Parametric Solutions 5 (sol25).
4
Locate the Title section. From the Title type list, choose None.
5
Locate the Color Legend section. Select the Show titles checkbox.
6
Select the Show units checkbox.
7
Click to expand the Plot Array section. Select the Enable checkbox.
Velocity
1
In the Drive Cases, ANR = 1.3, T, U, and dP toolbar, click  Surface.
2
In the Settings window for Surface, type Velocity in the Label text field.
3
Locate the Expression section. In the Expression text field, type spf.U.
4
Locate the Coloring and Style section. From the Color table list, choose Metasepia.
5
In the Color legend title text field, type U.
6
From the Color table transformation list, choose Reverse.
7
From the Color table type list, choose Discrete.
8
In the Number of bands text field, type 5.
9
In the Drive Cases, ANR = 1.3, T, U, and dP toolbar, click  Annotation.
10
In the Settings window for Annotation, type U in the Label text field.
11
Locate the Annotation section. In the Text text field, type U.
12
Locate the Position section. In the z text field, type -0.21.
13
Locate the Coloring and Style section. Clear the Show point checkbox.
14
Click to expand the Plot Array section. Select the Manual indexing checkbox.
Pressure
1
In the Drive Cases, ANR = 1.3, T, U, and dP toolbar, click  Surface.
2
In the Settings window for Surface, type Pressure in the Label text field.
3
Locate the Expression section. In the Expression text field, type p.
4
Locate the Coloring and Style section. From the Color table list, choose Agama.
5
In the Color legend title text field, type dP.
6
From the Color table type list, choose Discrete.
7
In the Drive Cases, ANR = 1.3, T, U, and dP toolbar, click  Annotation.
8
In the Settings window for Annotation, type dP in the Label text field.
9
Locate the Annotation section. In the Text text field, type dP.
10
Locate the Position section. In the z text field, type -0.21.
11
Locate the Coloring and Style section. Clear the Show point checkbox.
12
Locate the Plot Array section. Select the Manual indexing checkbox.
13
In the Index text field, type 1.
Temperature
1
In the Drive Cases, ANR = 1.3, T, U, and dP toolbar, click  Surface.
2
In the Settings window for Surface, type Temperature in the Label text field.
3
Locate the Expression section. In the Expression text field, type T.
4
From the Unit list, choose °C.
5
Locate the Coloring and Style section. From the Color table list, choose Plasma.
6
In the Color legend title text field, type T.
7
From the Color table type list, choose Discrete.
8
In the Drive Cases, ANR = 1.3, T, U, and dP toolbar, click  Selection.
9
In the Settings window for Selection, locate the Selection section.
10
From the Selection list, choose Porous and Free Flow Domains.
11
In the Drive Cases, ANR = 1.3, T, U, and dP toolbar, click  Annotation.
12
In the Settings window for Annotation, type T in the Label text field.
13
Locate the Annotation section. In the Text text field, type T.
14
Locate the Position section. In the z text field, type -0.21.
15
Locate the Coloring and Style section. Clear the Show point checkbox.
16
Locate the Plot Array section. Select the Manual indexing checkbox.
17
In the Index text field, type 2.
18
Click the  Zoom Extents button in the Graphics toolbar.
19
In the Drive Cases, ANR = 1.3, T, U, and dP toolbar, click  Plot.
The following steps generate Figure 17.
Figure 17: Conversions, NH3 and NOx
1
In the Results toolbar, click  1D Plot Group.
2
In the Settings window for 1D Plot Group, type Conversions, NH3 and NOx, All Cases in the Label text field.
3
Locate the Data section. From the Dataset list, choose Study 5: Monolith Reactor Model/Parametric Solutions 5 (sol25).
4
Click to expand the Title section. From the Title type list, choose None.
5
Locate the Plot Settings section.
6
Select the y-axis label checkbox. In the associated text field, type Conversion.
NH3 center
1
In the Conversions, NH3 and NOx, All Cases toolbar, click  Line Graph.
2
In the Settings window for Line Graph, type NH3 center in the Label text field.
3
Select Boundaries 5, 7, and 9 only.
4
Locate the y-Axis Data section. In the Expression text field, type X_NH3.
5
Select the Description checkbox. In the associated text field, type Conversion.
6
Locate the x-Axis Data section. From the Parameter list, choose Expression.
7
In the Expression text field, type (0.4-z)*pi*d_cat^2/4.
8
Select the Description checkbox. In the associated text field, type Volume.
9
Click to expand the Coloring and Style section. Find the Line style subsection. From the Line list, choose Cycle.
10
From the Color list, choose Blue.
11
From the Width list, choose 2.
12
Click to expand the Legends section. Select the Show legends checkbox.
13
Find the Prefix and suffix subsection. In the Prefix text field, type NH<sub>3</sub> center, .
NOx center
1
Right-click NH3 center, and choose Duplicate.
2
In the Settings window for Line Graph, type NOx center in the Label text field.
3
Select Boundaries 5, 7, and 9 only.
4
Locate the y-Axis Data section. In the Expression text field, type X_NOx.
5
Locate the Coloring and Style section. Find the Line style subsection. From the Line list, choose Cycle (reset).
6
From the Color list, choose Magenta.
7
Locate the Legends section. Find the Prefix and suffix subsection. In the Prefix text field, type NOx center, .
8
In the Model Builder window, under Results > Conversions, NH3 and NOx, All Cases, Ctrl-click to select NH3 center, and NOx center,.
9
Right-click and choose Duplicate.
NH3 edge
1
In the Model Builder window, under Results > Conversions, NH3 and NOx, All Cases click NH3 center, 1.
2
In the Settings window for Line Graph, type NH3 edge in the Label text field.
3
Locate the Selection section. Click  Clear Selection.
4
Select Boundaries 44, 46, and 47 only.
5
Click to expand the Coloring and Style section. Find the Line style subsection. From the Line list, choose Cycle (reset).
6
From the Color list, choose Black.
7
Locate the Legends section. Find the Prefix and suffix subsection. In the Prefix text field, type NH<sub>3</sub> edge, .
NOx edge
1
In the Model Builder window, under Results > Conversions, NH3 and NOx, All Cases click NOx center 1.
2
In the Settings window for Line Graph, type NOx edge in the Label text field.
3
Locate the Selection section. Click  Clear Selection.
4
Select Boundaries 44, 46, and 47 only.
5
Locate the Coloring and Style section. From the Color list, choose Red.
6
Locate the Legends section. Find the Prefix and suffix subsection. In the Prefix text field, type NOx edge, .
7
In the Model Builder window, click Conversions, NH3 and NOx, All Cases.
8
In the Settings window for 1D Plot Group, click to expand the Window Settings section.
9
Locate the Legend section. From the Layout list, choose Outside graph axis area.
10
Click the  Zoom Extents button in the Graphics toolbar.
11
In the Conversions, NH3 and NOx, All Cases toolbar, click  Plot.
The following steps generate Figure 18.
Figure 18: Temperature Difference Along Reactor Axis
1
In the Results toolbar, click  1D Plot Group.
2
In the Settings window for 1D Plot Group, type Temperature Difference Along Reactor Axis in the Label text field.
3
Locate the Data section. From the Dataset list, choose Study 5: Monolith Reactor Model/Parametric Solutions 5 (sol25).
4
Locate the Title section. From the Title type list, choose None.
5
Locate the Plot Settings section.
6
Select the x-axis label checkbox. In the associated text field, type Bed position along reactor axis (m).
7
Locate the Legend section. From the Layout list, choose Outside graph axis area.
Temperature At Reactor Center
1
Right-click Temperature Difference Along Reactor Axis and choose Line Graph.
2
In the Settings window for Line Graph, type Temperature At Reactor Center in the Label text field.
3
Select Boundaries 5, 7, and 9 only.
4
Locate the y-Axis Data section. In the Expression text field, type T-T_gas_in.
5
Locate the x-Axis Data section. From the Parameter list, choose Reversed arc length.
6
Locate the Coloring and Style section. From the Width list, choose 2.
7
Locate the Legends section. Select the Show legends checkbox.
8
Find the Prefix and suffix subsection. In the Prefix text field, type T center, .
Temperature At Bed Edge
1
Right-click Temperature At Reactor Center and choose Duplicate.
2
n the Settings window for Line Graph, type Temperature At Bed Edge in the Label text field.
3
In the Settings window for Line Graph, locate the Selection section.
4
Click  Clear Selection.
5
Select Boundaries 44, 46, and 47 only.
6
Locate the Coloring and Style section. Find the Line style subsection. From the Line list, choose Dashed.
7
From the Color list, choose Cycle (reset).
8
From the Width list, choose 2.
9
Locate the Legends section. Find the Prefix and suffix subsection. In the Prefix text field, type T edge, .
10
Click the  Zoom Extents button in the Graphics toolbar.
11
In the Temperature Difference Along Reactor Axis toolbar, click  Plot.
As a final evaluation, derive the average molar fraction of NH3 and NOx out from the first bed, as well as out from the reactor.
Line Average SCR Outlet
1
In the Results toolbar, click  More Derived Values and choose Average > Line Average.
2
In the Settings window for Line Average, type Line Average SCR Outlet in the Label text field.
3
Locate the Data section. From the Dataset list, choose Study 5: Monolith Reactor Model/Parametric Solutions 5 (sol25).
4
Select Boundary 10 only.
5
Locate the Expressions section. In the table, enter the following settings:
Expression
Unit
Description
yNH3
ppm
Molar Fraction NH3
yNOx
ppm
Molar Fraction NOx
6
Clicknext to  Evaluate, then choose New Table.
Line Average Reactor Outlet
1
Right-click Line Average SCR Outlet and choose Duplicate.
2
In the Settings window for Line Average, type Line Average Reactor Outlet in the Label text field.
3
Select Boundary 6 only.
4
Clicknext to  Evaluate, then choose New Table.
The modeling instructions for the Concentration and Temperature Profiles plot is available in the Application Libraries’ model monolith_reactor.mph.