When using Aspen Property to calculate viscosity, the following message appears! !
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When using Aspen Property to calculate viscosity, the following message appears. See the figure. It says the component is not permitted by the selected material properties! Please ask an expert for help! Thank you! !
I simply can’t delete other things. How do I go about it? Please forgive my ignorance as a beginner. . . Thank you. . .
Method 1: Reconstruct this model, following the method above； Method 2: Use a simple process to simulate it.
The calculations have been completed, but there are issues with running them now; it says that my H2O and NaOH components haven’t been defined, and it also states that the NRTL property method is not applicable. . . ->Processing input specifications ... STRUCTURE FOR COMPONENT H2O HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. STRUCTURE FOR COMPONENT NAOH HAS NOT BEEN DEFINED. PCES CANNOT USE GROUP-CONTRIBUTION METHODS TO ESTIMATE MISSING PROPERTIES USE THE STRUCTURES PARAGRAPH TO DEFINE STRUCTURES OF THIS COMPONENT. * WARNING IN PHYSICAL PROPERTY SYSTEM PARAMETER DHVLWT/ELEMENT 3 (DATA SET 1) UPPER BOUND VIOLATED FOR COMPONENT NAOH VALUE = 2.1002 , UPPER BOUND = 2.0000 * WARNING IN PHYSICAL PROPERTY SYSTEM PARAMETER DHVLWT/ELEMENT 4 (DATA SET 1) LOWER BOUND VIOLATED FOR COMPONENT NAOH VALUE = -5.1627 , LOWER BOUND = -2.0000 * WARNING IN PHYSICAL PROPERTY SYSTEM PARAMETER PLXANT (DATA SET 1) FOR COMPONENT NAOH: UNREASONABLE VAPOR PRESSURE CALCULATED AT NORMAL BOILING POINT. VALUE SHOULD BE WITHIN 10% OF 1D5 N/SQM. PLEASE CHECK YOUR INPUT FOR THE ANTOINE PARAMETERS. * WARNING IN PHYSICAL PROPERTY SYSTEM NRTL BINARY PARAMETERS FOR ALL COMPONENT PAIRS ARE ZERO, YOUR RESULTS MAY NOT BE ACCURATE. PLEASE REVIEW AND PROVIDE BINARY PARAMETERS AS APPROPRIATE. ->Table Generation begins ... ->Table generation completed Thank you. . .
Which version are you using? Create a small process for simulation, using ELECNRTL for the property methods. Looking at your document, it’s an alkaline solution; its viscosity can be found in literature.
It can be looked up, but I need to learn ASPEN. . . I’m using 8.4. Why do we need to use the properties method for electrolytes? I don’t quite understand it. . . Thank you. . .
It’s strange why ASPEN didn’t let me enter the proportions of each component ! I ran it, and it gave me another warning! See the figure.