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DWSIM Automation Sample in Python - Create a Flowsheet with a Distillation Column for Water/Acetone/Ethanol Separation (requires DWSIM v8.4.5 or newer)
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| # remove the following two lines to run on linux | |
| import pythoncom | |
| pythoncom.CoInitialize() | |
| import clr | |
| from System.IO import Directory, Path, File | |
| from System import String, Environment | |
| dwsimpath = "C:\\Users\\danie\\AppData\\Local\\DWSIM\\" | |
| clr.AddReference(dwsimpath + "CapeOpen.dll") | |
| clr.AddReference(dwsimpath + "DWSIM.Automation.dll") | |
| clr.AddReference(dwsimpath + "DWSIM.Interfaces.dll") | |
| clr.AddReference(dwsimpath + "DWSIM.GlobalSettings.dll") | |
| clr.AddReference(dwsimpath + "DWSIM.SharedClasses.dll") | |
| clr.AddReference(dwsimpath + "DWSIM.Thermodynamics.dll") | |
| clr.AddReference(dwsimpath + "DWSIM.UnitOperations.dll") | |
| clr.AddReference(dwsimpath + "DWSIM.Inspector.dll") | |
| clr.AddReference(dwsimpath + "System.Buffers.dll") | |
| clr.AddReference(dwsimpath + "DWSIM.Thermodynamics.ThermoC.dll") | |
| from DWSIM.Interfaces.Enums.GraphicObjects import ObjectType | |
| from DWSIM.Thermodynamics import Streams, PropertyPackages | |
| from DWSIM.UnitOperations import UnitOperations | |
| from DWSIM.Automation import Automation3 | |
| from DWSIM.GlobalSettings import Settings | |
| from System import Array | |
| Directory.SetCurrentDirectory(dwsimpath) | |
| # create automation manager | |
| manager = Automation3() | |
| myflowsheet = manager.CreateFlowsheet() | |
| # add compounds | |
| cnames = ["Water", "Ethanol","Acetone"] | |
| myflowsheet.AddCompound("Water") | |
| myflowsheet.AddCompound("Ethanol") | |
| myflowsheet.AddCompound("Acetone") | |
| # create and connect objects | |
| feed = myflowsheet.AddFlowsheetObject("Material Stream", "Feed") | |
| dist = myflowsheet.AddFlowsheetObject("Material Stream", "Distillate") | |
| bottoms = myflowsheet.AddFlowsheetObject("Material Stream", "Bottoms") | |
| column = myflowsheet.AddFlowsheetObject("Distillation Column", "Column") | |
| feed = feed.GetAsObject() | |
| dist = dist.GetAsObject() | |
| bottoms = bottoms.GetAsObject() | |
| column = column.GetAsObject() | |
| # change number of stages - default is 10 | |
| column.SetNumberOfStages(12) | |
| # connect streams to column | |
| column.ConnectFeed(feed, 6) | |
| column.ConnectDistillate(dist) | |
| column.ConnectBottoms(bottoms) | |
| myflowsheet.NaturalLayout() | |
| feed.SetOverallComposition(Array[float]([0.4, 0.4, 0.2])) | |
| feed.SetTemperature(350.0) # K | |
| feed.SetPressure(101325.0) # Pa | |
| feed.SetMolarFlow(300.0) # mol/s | |
| # allowed specs: | |
| # Heat_Duty = 0 | |
| # Product_Molar_Flow_Rate = 1 | |
| # Component_Molar_Flow_Rate = 2 | |
| # Product_Mass_Flow_Rate = 3 | |
| # Component_Mass_Flow_Rate = 4 | |
| # Component_Fraction = 5 | |
| # Component_Recovery = 6 | |
| # Stream_Ratio = 7 | |
| # Temperature = 8 | |
| column.SetCondenserSpec("Reflux Ratio", 3.0, "") | |
| column.SetReboilerSpec("Product_Molar_Flow_Rate", 200.0, "mol/s") | |
| # property package | |
| nrtl = myflowsheet.CreateAndAddPropertyPackage("NRTL") | |
| # request a calculation | |
| errors = manager.CalculateFlowsheet4(myflowsheet) | |
| # get condenser and reboiler duties | |
| cduty = column.CondenserDuty | |
| rduty = column.ReboilerDuty | |
| print("Condenser Duty: " + str(cduty) + " kW") | |
| print("Reboiler Duty: " + str(rduty) + " kW") | |
| dtemp = dist.GetTemperature() | |
| dflow = dist.GetMolarFlow() | |
| btemp = bottoms.GetTemperature() | |
| bflow = bottoms.GetMolarFlow() | |
| print() | |
| print("Distillate Temperature: " + str(dtemp) + " K") | |
| print("Bottoms Temperature: " + str(btemp) + " K") | |
| print() | |
| print("Distillate Molar Flow: " + str(dflow) + " mol/s") | |
| print("Bottoms Molar Flow: " + str(bflow) + " mol/s") | |
| # product compositions | |
| print() | |
| distcomp = dist.GetOverallComposition() | |
| print("Distillate Molar Composition:") | |
| for i in range(0, 3): | |
| print(cnames[i] + ": " + str(distcomp[i])) | |
| i+=1 | |
| print() | |
| bcomp = bottoms.GetOverallComposition() | |
| print("Bottoms Molar Composition:") | |
| for i in range(0, 3): | |
| print(cnames[i] + ": " + str(bcomp[i])) | |
| i+=1 | |
| # save file | |
| fileNameToSave = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "python_column_sample.dwxmz") | |
| manager.SaveFlowsheet(myflowsheet, fileNameToSave, True) | |
| # save the pfd to an image and display it | |
| clr.AddReference(dwsimpath + "SkiaSharp.dll") | |
| clr.AddReference("System.Drawing") | |
| from SkiaSharp import SKBitmap, SKImage, SKCanvas, SKEncodedImageFormat | |
| from System.IO import MemoryStream | |
| from System.Drawing import Image | |
| from System.Drawing.Imaging import ImageFormat | |
| PFDSurface = myflowsheet.GetSurface() | |
| imgwidth = 1024 | |
| imgheight = 768 | |
| bmp = SKBitmap(imgwidth, imgheight) | |
| canvas = SKCanvas(bmp) | |
| PFDSurface.Center(imgwidth, imgheight) | |
| PFDSurface.ZoomAll(imgwidth, imgheight) | |
| PFDSurface.UpdateCanvas(canvas) | |
| d = SKImage.FromBitmap(bmp).Encode(SKEncodedImageFormat.Png, 100) | |
| str = MemoryStream() | |
| d.SaveTo(str) | |
| image = Image.FromStream(str) | |
| imgPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "pfd.png") | |
| image.Save(imgPath, ImageFormat.Png) | |
| str.Dispose() | |
| canvas.Dispose() | |
| bmp.Dispose() | |
| from PIL import Image | |
| im = Image.open(imgPath) | |
| im.show() |
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What about Linux ??