Batch Mode

In designing RO/NF/ROSC systems, there is often interest in understanding the behavior of the system at multiple design conditions. Rather than changing the parameters one at a time, WAVE provides the possibility of simulating the system at multiple values of select parameters: Temperature and Flow Factor. WAVE is run in Batch mode as described below.

  1. Create a case and generate the Summary Report.
  2. Click on the “Run Batch” button. The Batch Processing Popup Window will appear (Figure 1).

    Figure 1: Running WAVE in Batch Mode: Activating Batch Mode

  3. Update the Minimum and Maximum temperature values if needed.
  4. Update the number of intermediate points of interest between the Minimum and Maximum temperature values. WAVE would automatically calculate the temperature step size.
  5. Update the Startup and Long term Flow Factor values for the relevant Pass. By default, the values are 1 and 0.85 respectively for all passes.
  6. If compaction needs to be considered, check the box next to “Account for flux loss at high temperature” and specify the highest temperature the membrane is exposed to. 
  7. Click on the Output Parameters Tab in the Batch Processing Popup Window and confirm that all the variables of interest are going to be displayed Figure 2).

    Figure 2: Running WAVE in Batch Mode: Confirming desired output of Batch run

  8. Click on the Batch Cases Tab in the Batch Processing Popup Window and select which combinations of Temperature and Flow Factor are to be converted to Cases. WAVE would generate a table with all the possible combinations of the given Flow Factors and the Temperature values (including the minimum, maximum and all intermediate values) and the corresponding results (Figure 3).

    Figure 3: Running WAVE in Batch Mode: Selection of which combinations to test and implementing the batch run

  9. To generate Cases, click on the ‘Create Case” button (Figure 3).
  1. Click “Calculate Batch”. WAVE would start to populate the empty fields (selected in the Output Parameters tab) with calculation results (Figure 4).

    Figure 4: Running WAVE in Batch Mode:Final output

Note:  By default the temperature entries in the Input Parameters tab of the Batch Processing Window are taken from the entries in the Feed Water Tab but they can be over-ridden for Batch calculations.