一步一步教你学习ASPEN Dynamics系列1（盖德首发）？ 继续。接上面例子 workshop: adding dynamic data 1. from the workshop directory, select the file adddyndata-start.bkp 2. use the right mouse button (rmb) to open the file in aspen plus 3. click dynamic button to be able to access the dynamic data forms 4. select flash block d101 5. rmb/input to open the block d101 (flash2) data browser 6. click on dynamic in the tree data browser view to access the dynamic forms 7. change the vessel type to vertical on vessel tab 8. enter a vessel length of 3 meters 9. enter a vessel diameter of 2 meters 10. use the next button to bring up the block t101 (radfrac) dynamic data browser form 11. on the reflux drum tab form, specify a horizontal vessel type 12. specify a drum length of 5 meters 13. specify a drum diameter of 2 meters 14. click on the condenser tab 15. change the heat transfer option to constant temperature 16. enter a medium temperature of -45 degrees c 17. click on the reboiler tab 18. change the heat transfer option to lmtd 19. enter a medium temperature of 80 degrees c 20. enter a temperature approach of 5 degrees c 21. click on the sump tab 22. enter a sump height of 3 m 23. enter a sump diameter of 2.8 meters 24. click on the hydraulics tab 25. enter rigorous as the hydraulics option 26. click trayrating in the tree view of the data browser to bring up the block t101 (radfrac) trayrating data browser form 27. click new to create a new tray rating object 28. ok to accept the default section name 29. on the specs tab, enter 2 as the starting stage. 30. enter 20 as the ending stage 31. enter a sieve as the tray type 32. enter 2 as the number of passes 33. enter 2.8 meters as the column diameter 34. click on the design/pdrop tab 35. tick the update section pressure profile box in the pressure drop section 36. click next to run the simulation 37. file/export to export the simulation 38. navigate to the workshop directory 39. select “flow driven dyn simulation” as the save as file type 40. save the file 41. file/save as to save a backup copy 42. select aspen plus backup files (*.bkp) as the save as type. 43. save the file 44. file/exit to close aspen plus workshop: running the dynamic simulation 1. from the workshop directory, select the file rundynsim-start.bkp 2. use the right mouse button (rmb) to open the file in aspen dynamics 3. use the windows menu to set the flowsheet as wall** 4. tools menu/new plot… to create a new empty plot 5. select the hcfeed stream 6. rmb forms/manipulate to open the manipulate form 7. highlight the variable fmr on the manipulate table and then drag and drop unto the new plot 8. select the stream vapfeed 9. double-click to open the results form (default action) 10. highlight the variable fm on the results table and then drag and drop unto the new plot 11. select the liqfeed stream 12. double-click to open the results table 13. highlight the variable fm on the results table and then drag and drop unto the new plot 14. select block d101 15. double-click to open the results form 16. highlight the variable level on the results table and then drag and drop unto the new plot 17. open the controller block lc1 (flash block d101 level controller) faceplate by double clicking on the lc1 icon 18. click the lc1 faceplate plot button to open the associated resultsplot form. 19. create a new profile plot to display the column ethane and propane liquid phase compositions 20. tools menu/new profile plot 21. enter the flowsheet plot name c2_c3_split to create an empty profile plot 22. on any space in the empty plot, rmb to bring up the plot pop-up menu 23. select profile variables to bring up the profile editor 24. for profile 1, enter ethane in the profile name field 25. click on the add button under the y-axis variables section 26. enter the variable name for the first profile: blocks(“t101”).stages(*)x.(“ethane”) the profile editor should look like the picture below 27. step the profile value to 2 by clickin the ‘up’ arrow 28. for profile 1, enter propane in the profile name field 29. click on the add button under the y-axis variables section 30. enter the variable name for the second profile: blocks(“t101”).stages(*)x.(“propane”) 31. ok to accept the changes in the profile editor. 32. run menu/pause at 33. specify a pause time of 0.1 hours 34. run the simulation in dynamic mode to time 0.1 hours 35. when the simulation completes at time 0.1, place the cursor on the plot and rmb/zoom full on the time series 36. repeat the zoom full for the controller time series plot 37. use the rmb pop-up menu to bring up the profile editor again. 38. under the time settings section, click on the specify times radio button add a time of 0.25 39. open the hydrocarbon feed manipulate table 40. enter a value 110,400 (kg/hr.) for the variable fmr 41. run menu/pause to set the simulation to pause at time 0.25 hours 42. run the simulation to completion 43. when the simulation completes at time 0.25, zoom full on the two time series (not the profile plot) 44. modify the plot properties axis range, axis map, grid interval, 45. file menu /save as to 46. select save as type aspen dynamics language (*.dynf) file type 47. click on save to save the file 48. file/exit to quit aspen dynamics variable fm is the variable in stream hcfeed results table that is equivalent to variable fmr in the manipulate table the flash drum level controller seems reasonably tuned, however it does not return to its set-point because it is a proportional-only controller查看更多
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