Study 2: SCR Operating Window, Effect of ANR
We will reuse the work we spent on setting up Study 1. Therefore, delete the default study step in Study 2, and copy paste the study steps used in Study 1.
1
In the Model Builder window, under Study 2 right-click Step 1: Stationary Plug Flow and choose Delete.
2
In the Model Builder window, under Study 1: SCR Temperature Operating Window, ANR = 1.3, Case 2 right-click Step 1: Stationary Plug Flow and choose Copy.
3
In the Model Builder window, right-click Study 2 and choose Paste Stationary Plug Flow.
4
In the Settings window for Stationary Plug Flow, locate the Study Extensions section.
5
Click  Add.
6
In the table, enter the following settings:
Parameter name
Parameter value list
Parameter unit
ANR (Ammonia to NOx ratio in gas entering the reactor)
range(1,0.1,1.6)
 
7
From the Sweep type list, choose All combinations.
8
Locate the Study Settings section. In the Output volumes text field, type range(0, V_SCR/10, V_SCR).
9
In the Model Builder window, click Study 2.
10
In the Settings window for Study, locate the Study Settings section.
11
Clear the Generate default plots checkbox.
12
In the Label text field, type Study 2: SCR Temperature Operating Window, ANR Effect, Case 2.
Solution 2 (sol2)
1
In the Study toolbar, click  Show Default Solver.
2
In the Model Builder window, expand the Solution 2 (sol2) node, then click Dependent Variables 1.
3
In the Settings window for Dependent Variables, locate the Scaling section.
4
From the Method list, choose Initial-value based.
5
In the Model Builder window, under Study 2: SCR Temperature Operating Window, ANR Effect, Case 2 > Solver Configurations > Solution 2 (sol2) click Plug Flow Solver 1.
6
In the Settings window for Plug Flow Solver, locate the General section.
7
From the Volumes to store list, choose Output volumes by interpolation.
8
In the Model Builder window, click Results.
9
In the Settings window for Results, locate the Update of Results section.
10
Select the Only plot when requested checkbox.
11
In the Study toolbar, click  Compute.