Albemarle using user variables scripts triggers
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The document discusses using user variables, scripts, and triggers in KBC software to iteratively estimate flue gas composition from hydrogen content in coke. It proposes creating user variables to store the hydrogen target and estimated flue gas CO2, then using scripts and triggers to iterate the CO2 calculation until the target is met. Diagrams show the logic flow and how triggers would solve the FCC model on changes to drive iteration. The conclusion states that user variables and scripts add functionality, and triggers require practice to setup correctly.
Albemarle using user variables scripts triggers
- 1. Proprietary Information of Albemarle Corporation. Using User Variables, Scripts & Triggers Alan Kramer Global FCC Modeling Specialist KBC Software User Group Conference 2018 Houston
- 2. Proprietary Information of Albemarle Corporation. • Often we receive data with poor flue gas analysis. • This leads to bad values for Hydrogen in Coke. • For “simple” situations, we can use an equation to estimate the flue gas analysis to give a reasonable H in Coke. • For “complex” situations, we have to manually iterate each calibration case individually for the flue gas estimate to give a reasonable H in Coke. • We want to add H in Coke as an independent variable in calibration mode. • We want the model to solve for the flue gas analysis. The Problem 2
- 3. Proprietary Information of Albemarle Corporation. • Create a user variable to hold the H in Coke target value. – This can be input from Calibration Input • Create a user variable script to calculate the flue gas CO2. • Use triggers to start the script calculation. • Use triggers to iterate the CO2 calculation until the H in Coke target is met. The Solution 3
- 4. Proprietary Information of Albemarle Corporation. Logic Schematic 4 Flue Gas CO2 H Content of Coke Stream FCC
- 5. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic 5 Flue Gas CO2 H Content of Coke Stream FCC
- 6. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic Flue Gas CO2 H Content of Coke Stream FCC HinC Target
- 7. Proprietary Information of Albemarle Corporation. Creating User Variables To Store Values 7
- 8. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC Script Flue Gas CO2 H Content of Coke Stream FCC HinC Target
- 9. Proprietary Information of Albemarle Corporation. Creating User Variables With Embedded Scripts 9 Type script here
- 10. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC Script Flue Gas CO2 H Content of Coke Stream FCC HinC Target
- 11. Proprietary Information of Albemarle Corporation. Writing Scripts 11
- 12. Proprietary Information of Albemarle Corporation. VB Script Hints 12 • All script variables are variant type • No script variable declarations – You do need to declare arrays with dimensions • If a variable in a script refers to an object, you must SET it • No GOTO, GOSUB, EXIT or END – Handle this with (nested) IF blocks and lots of planning – But you can have multiple functions in a single script • Empty = -32767
- 13. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 H Content of Coke Stream FCC
- 14. Proprietary Information of Albemarle Corporation. Writing Scripts 14
- 15. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 H Content of Coke Stream FCC
- 16. Proprietary Information of Albemarle Corporation. Writing Scripts 16
- 17. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 H Content of Coke Stream FCC HinC Current Error
- 18. Proprietary Information of Albemarle Corporation. Writing Scripts 18
- 19. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 H Content of Coke Stream FCC HinC Current ErrorIf ~0 then stop
- 20. Proprietary Information of Albemarle Corporation. Writing Scripts 20
- 21. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 H Content of Coke Stream FCC HinC Stored Error HinC Current Error
- 22. Proprietary Information of Albemarle Corporation. Writing Scripts 22
- 23. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 HinC Stored Error H Content of Coke Stream FCC HinC Current ErrorIf = then stop
- 24. Proprietary Information of Albemarle Corporation. Writing Scripts 24
- 25. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 HinC Stored Error H Content of Coke Stream FCC HinC Current Error
- 26. Proprietary Information of Albemarle Corporation. Writing Scripts 26
- 27. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 HinC Stored Error H Content of Coke Stream FCC T
- 28. Proprietary Information of Albemarle Corporation. Setting Trigger to Solve Parent Object on Value Change 28
- 29. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 HinC Stored Error H Content of Coke Stream FCC T
- 30. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 HinC Stored Error H Content of Coke Stream FCC T
- 31. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 HinC Stored Error T H Content of Coke Stream Trigger 3 FCC Value
- 32. Proprietary Information of Albemarle Corporation. Run Script After Parent Object Execute 32
- 33. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 HinC Stored Error T H Content of Coke Stream Trigger 3 T FCC
- 34. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 HinC Stored Error T Trigger 1 H Content of Coke Stream Trigger 3 T FCC Value
- 35. Proprietary Information of Albemarle Corporation. Setting Trigger to Solve Parent Object on Value Change 35
- 36. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic HinC TargetHinC Script Flue Gas CO2 HinC Stored Error T Trigger 1 T H Content of Coke Stream Trigger 3 T FCC
- 37. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic 37 HinC TargetHinC Script Flue Gas CO2 HinC Stored Error T Trigger 1 T H Content of Coke Stream Trigger 2 T Trigger 3 T FCC Compare If different take on a random value between 0 and 1
- 38. Proprietary Information of Albemarle Corporation. Setting Trigger to Take on A Radom Value 38
- 39. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic 39 HinC TargetHinC Script Flue Gas CO2 HinC Stored Error T Trigger 1 T H Content of Coke Stream Trigger 2 T Trigger 3 T FCC
- 40. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic 40 HinC TargetHinC Script Flue Gas CO2 HinC Stored Error T Trigger 1 T Trigger on Calib Start TH Content of Coke Stream Trigger 2 T Trigger 3 T FCC
- 41. Proprietary Information of Albemarle Corporation. Setting Trigger to Run Script on Calibration Starting 41
- 42. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic 42 HinC TargetHinC Script Flue Gas CO2 HinC Stored Error T Trigger 1 T Trigger on Calib Start TH Content of Coke Stream Trigger 2 T Trigger 3 T FCC -1
- 43. Proprietary Information of Albemarle Corporation. Setting Trigger to Solve Parent Object on Value Change 43
- 44. Proprietary Information of Albemarle Corporation. FCC-MeterFCC Coke-Meter Logic Schematic 44 HinC TargetHinC Script Flue Gas CO2 HinC Stored Error T Trigger 1 T Trigger on Calib Start TH Content of Coke Stream Trigger 2 T Trigger 3 T FCC
- 45. Proprietary Information of Albemarle Corporation. • User variables and scripts aren’t really difficult or scary. • You can use user variables and scripts to add important functionality. • The ‘simplicity’ of VB Script has advantages and drawbacks. • Triggers take some practice and patience to set up correctly. • Save often. It’s easy to create infinite calculation loops. • VB Script syntax examples on following slides. Conclusions 45
- 46. Proprietary Information of Albemarle Corporation. • Create a variable referencing an object in the flowsheet Set CokeMeter = SimulationCase.GetObjectInCase("FCC Coke-Meter") • Create a variable referencing a variable in a meter Set HinCVariable = CokeMeter.ActiveDataSet.Variables.Find("Hydrogen Content", "") • Store the value from the ‘screened’ column of a meter using a specific unit of measure HinC = HinCVariable.ScreenedValueWithUnits("wt %") • Put a value into the ‘input’ column of a meter HinCVariable.InputValue = 7 VB Script Syntax Examples 46
- 47. Proprietary Information of Albemarle Corporation. • Get a user variable value from the same parent object ThisScriptVariable = Me.GetUserVariable(“OtherUserVar").Variable.Value • To set the value of a user variable value, flip the above statement around • Get a user variable value with a specific UOM from another object (cokemeter) ThisScriptVariable = CokeMeter.GetUserVariable(“OtherUserVar").Variable.GetValue(“UOM”) • Set the value of the current user variable to xxx Result = xxx • Send something to the trace window Application.Trace “Something = " & Something, True VB Script Syntax Examples 47
- 48. Proprietary Information of Albemarle Corporation.