Results for Study 3
The following steps generate Figure 8.
Figure 8: Molar Fraction of NH3 and NOx
1
In the Results toolbar, click  1D Plot Group.
2
In the Settings window for 1D Plot Group, type Molar Fraction of NH3 and NOx in the Label text field.
3
Locate the Data section. From the Dataset list, choose Study 3: Single Channel Model, Influence of ANR, Case 2/Parametric Solutions 2 (sol6).
NH3 SCR
1
Right-click Molar Fraction of NH3 and NOx and choose Global.
2
In the Settings window for Global, type NH3 SCR in the Label text field.
3
Locate the y-Axis Data section. Click  Clear Table.
4
Click  Replace Expression in the upper-right corner of the y-Axis Data section. From the menu, choose Component 1 > Definitions > Variables > yNH3_SCR - Molar fraction of NH3 in SCR catalytic bed - 1.
5
Locate the y-Axis Data section. In the table, enter the following settings:
Expression
Unit
Description
yNH3_SCR
ppm
Molar fraction of NH3 in SCR catalytic bed
6
Locate the Coloring and Style section. Find the Line style subsection. From the Line list, choose Cycle.
7
From the Color list, choose Blue.
8
From the Width list, choose 2.
9
Locate the Legends section. Clear the Show legends checkbox.
NH3
1
Right-click NH3 SCR and choose Duplicate.
2
In the Settings window for Global, type NH3 in the Label text field.
3
Locate the Data section. From the Dataset list, choose Study 3: Single Channel Model, Influence of ANR, Case 2/Parametric Solutions 1 (sol5).
4
Locate the y-Axis Data section. In the table, enter the following settings:
Expression
Unit
Description
yNH3_ASC
ppm
Molar fraction of NH3 in ASC
5
Locate the Coloring and Style section. Find the Line style subsection. From the Line list, choose Cycle (reset).
6
Locate the Legends section. Select the Show legends checkbox.
7
Find the Include subsection. Clear the Expression checkbox.
8
Find the Prefix and suffix subsection. In the Prefix text field, type NH<sub>3</sub>.
NOx SCR
1
In the Model Builder window, right-click NH3 SCR and choose Duplicate.
2
In the Settings window for Global, type NOx SCR in the Label text field.
3
Locate the y-Axis Data section. In the table, enter the following settings:
Expression
Unit
Description
yNOx_SCR
ppm
Molar fraction of NOx in SCR catalytic bed
4
Locate the Coloring and Style section. Find the Line style subsection. From the Line list, choose Cycle (reset).
5
From the Color list, choose Magenta.
NOx
1
Right-click NOx SCR and choose Duplicate.
2
In the Settings window for Global, type NOx in the Label text field.
3
Locate the Data section. From the Dataset list, choose Study 3: Single Channel Model, Influence of ANR, Case 2/Parametric Solutions 1 (sol5).
4
Locate the y-Axis Data section. In the table, enter the following settings:
Expression
Unit
Description
yNOx_ASC
ppm
Molar fraction of NOx in ASC
5
Locate the Legends section. Select the Show legends checkbox.
6
Find the Include subsection. Select the Label checkbox.
7
Clear the Expression checkbox.
Molar Fraction of NH3 and NOx
1
In the Model Builder window, click Molar Fraction of NH3 and NOx.
2
In the Settings window for 1D Plot Group, locate the Title section.
3
From the Title type list, choose None.
4
Locate the Plot Settings section.
5
Select the x-axis label checkbox. In the associated text field, type Reactor volume (m<sup>3</sup>).
6
Select the y-axis label checkbox. In the associated text field, type Molar Fraction of NH<sub>3</sub> (ppm).
7
Select the Two y-axes checkbox.
8
In the table, enter the following settings:
Plot
Plot on secondary y-axis
NH3 SCR
 
NH3
 
NOx SCR
√
NOx
√
9
Select the Secondary y-axis label checkbox. In the associated text field, type Molar Fraction of NOx (ppm).
10
Click the  Zoom Extents button in the Graphics toolbar.
11
In the Molar Fraction of NH3 and NOx toolbar, click  Plot.
The following steps generate Figure 9.
Figure 9: Conversion of NH3 and NOx
1
Right-click Molar Fraction of NH3 and NOx and choose Duplicate.
2
In the Model Builder window, click Molar Fraction of NH3 and NOx 1.
3
In the Settings window for 1D Plot Group, type Conversion of NH3 and NOx in the Label text field.
4
Locate the Plot Settings section. In the y-axis label text field, type Conversion (1).
5
Clear the Two y-axes checkbox.
6
Locate the Legend section. From the Position list, choose Lower right.
NH3 SCR
1
In the Model Builder window, click NH3 SCR.
2
In the Settings window for Global, click Replace Expression in the upper-right corner of the y-Axis Data section. From the menu, choose Component 1 > Definitions > Variables > X_NH3_SCR - NH3 Conversion in SCR - 1.
3
Locate the y-Axis Data section. In the table, enter the following settings:
Expression
Unit
Description
X_NH3_SCR
1
NH3 Conversion in SCR
NH3
1
In the Model Builder window, click NH3.
2
In the Settings window for Global, locate the y-Axis Data section.
3
In the table, enter the following settings:
Expression
Unit
Description
X_NH3_tot
1
NH3 Conversion in SCR
NOx SCR
1
In the Model Builder window, click NOx SCR.
2
In the Settings window for Global, locate the y-Axis Data section.
3
In the table, enter the following settings:
Expression
Unit
Description
X_NOx_SCR
1
NOx Conversion in SCR
NOx
1
In the Model Builder window, click NOx.
2
In the Settings window for Global, locate the y-Axis Data section.
3
In the table, enter the following settings:
Expression
Unit
Description
X_NOx_tot
1
Total NOx Conversion in System (SCR + ASC)
4
Click the  Zoom Extents button in the Graphics toolbar.
5
In the Conversion of NH3 and NOx toolbar, click  Plot.
The intermediate engine load case, referred to as case 2, has now been investigated, both in terms of temperature and ANR. How well does the system perform for other engine loads? Add a final study to investigate three different load cases for an ANR = 1.3. But first, add the last two plots in a Group with a suitable name.
Single Channel Model, Influence of ANR, Case 2
1
In the Model Builder window, under Results, Ctrl-click to select Molar Fraction of NH3 and NOx and Conversion of NH3 and NOx.
2
Right-click and choose Group.
3
In the Settings window for Group, type Single Channel Model, Influence of ANR, Case 2 in the Label text field.