Re: [dwsim-users] Dwsim-users Digest, Vol 13, Issue 2
Simulate chemical processes using advanced thermodynamic models
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From: Mohamed T. <sag...@gm...> - 2016-12-12 08:38:51
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Greetings, pleas reactive my account . بتاريخ ٢٠١٦/٠٨/٢٠ ٢:٠٥ ص، كتب <dws...@li...>: > Send Dwsim-users mailing list submissions to > dws...@li... > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.sourceforge.net/lists/listinfo/dwsim-users > or, via email, send a message with subject or body 'help' to > dws...@li... > > You can reach the person managing the list at > dws...@li... > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Dwsim-users digest..." > > > Today's Topics: > > 1. Re: Shortcut Distillation: DWSIM 3 vs DWSIM 4 (Daniel Wagner) > 2. DWSIM 4.0 Update 1 (Daniel Wagner) > 3. Inorganic Acid interaction parameters (Hector Perez) > 4. (no subject) (Hector Perez) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 3 Aug 2016 12:53:52 -0400 > From: Daniel Wagner <dan...@gm...> > Subject: Re: [dwsim-users] Shortcut Distillation: DWSIM 3 vs DWSIM 4 > To: Hector Perez <hpe...@gm...> > Cc: "dws...@li..." > <dws...@li...> > Message-ID: > <CAJ3X9UqfphruJf2Lp6+7U=xgE963McbKyZG3+skSRn60xGVPPQ@mail. > gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hi Hector, > > DWSIM 4 is faster but not THAT fast. Maybe it is something specific to your > case that was "accidentally" optimized... > > 2016-08-02 16:45 GMT-04:00 Hector Perez <hpe...@gm...>: > > > Hi Daniel, > > > > I've downloaded the new DWSIM 3.7 and 4.0. I was wondering if you could > > tell me why DWSIM 4 is so much faster (it does 1000 iterations in a > > Distillation column in a split second, whereas DWSIM 3 takes a long time > > [minutes])? > > > > Thanks > > > > Hector D. Perez > > > > On Fri, Jul 29, 2016 at 10:32 AM, Daniel Wagner <dan...@gm...> > > wrote: > > > >> Release Candidate 1 (RC1) was released yesterday => > >> https://sourceforge.net/projects/dwsim/files/DWSIM/ > DWSIM%204.0/DWSIM_bin_v40_RC1.exe/download > >> > >> Add your user.pcd file to the main Chemsep PCD file and you'll be able > to > >> run the simulation I've attached earlier. > >> > >> 2016-07-29 11:23 GMT-04:00 Hector Perez <hpe...@gm...>: > >> > >>> Is the RC1 release the same as Preview 4? > >>> > >>> I have attached the ChemSep pcd file that has H2SO4. > >>> > >>> Thanks, Daniel. This is an interesting system. From what I've gathered > >>> from literature, H2SO4 is used to break the Nitric acid/water > azeotrope to > >>> improve the nitric acid recovery. > >>> > >>> Hector D. Perez > >>> > >>> On Fri, Jul 29, 2016 at 10:09 AM, Daniel Wagner <dan...@gm...> > >>> wrote: > >>> > >>>> I've created a simulation with a ChemSep column but it doesn't have > >>>> Sulfuric Acid on its database. Maybe you could add it using the PCD > Manager. > >>>> > >>>> 2016-07-29 11:01 GMT-04:00 Daniel Wagner <dan...@gm...>: > >>>> > >>>>> Try this with the latest DWSIM 4 release (RC1). You won't be able to > >>>>> reproduce the results from the shortcut column in a rigorous one > because > >>>>> your system is extremely non-ideal... > >>>>> > >>>>> Daniel > >>>>> > >>>>> 2016-07-29 10:55 GMT-04:00 Hector Perez <hpe...@gm...>: > >>>>> > >>>>>> Thanks Daniel. I'll be looking forward to the releases. I was trying > >>>>>> to do it with ChemSep, but had some convergence issues with the > column. > >>>>>> I'll see if I can get one or the other to converge and use that > one. Thank > >>>>>> you. > >>>>>> > >>>>>> Hector D. Perez > >>>>>> > >>>>>> On Fri, Jul 29, 2016 at 9:40 AM, Daniel Wagner <dan...@gm... > > > >>>>>> wrote: > >>>>>> > >>>>>>> This is after applying the same fix to DWSIM 3: > >>>>>>> > >>>>>>> > >>>>>>> A final v3.7 build will be released together with DWSIM v4.0 with > >>>>>>> some critical bug fixes for those who prefer v3. They can be > installed > >>>>>>> side-by-side on the same machine. > >>>>>>> > >>>>>>> Regards > >>>>>>> Daniel > >>>>>>> > >>>>>>> 2016-07-29 10:36 GMT-04:00 Daniel Wagner <dan...@gm...>: > >>>>>>> > >>>>>>>> Hi Hector, > >>>>>>>> > >>>>>>>> The IO Flash algorithm was enhanced in DWSIM 4. There are a few > >>>>>>>> additional checks to ensure convergence. In DWSIM 3 it is > converging > >>>>>>>> earlier than expected for your case. > >>>>>>>> > >>>>>>>> And you're still struggling with this system in DWSIM. You really > >>>>>>>> should use ChemSep's column and thermo models through the > CAPE-OPEN > >>>>>>>> interface. > >>>>>>>> > >>>>>>>> Daniel > >>>>>>>> > >>>>>>>> 2016-07-29 10:08 GMT-04:00 Hector Perez <hpe...@gm...>: > >>>>>>>> > >>>>>>>>> Hi Daniel, > >>>>>>>>> > >>>>>>>>> I have set up shortcut distillations for a Sulfuric Acid - Nitric > >>>>>>>>> Acid - Water system. However, I am getting very different > results depending > >>>>>>>>> on which version of DWSIM I use. I have checked that my settings > are the > >>>>>>>>> same in both simulations (NRTL constants and Inside-Out VLE flash > >>>>>>>>> algorithm). DWSIM 3 predicts 21 minimum stages, whereas DWSIM 4 > predicts > >>>>>>>>> only 3 stages. I am running with a issue in DWSIM 3: it is not > predicting > >>>>>>>>> the actual number of stages (only predicts the minimum number) > or the > >>>>>>>>> optimal feed stage. Both of these values show NaN. > >>>>>>>>> > >>>>>>>>> I would appreciate any insight here. > >>>>>>>>> > >>>>>>>>> I still haven't gotten the rigorous columns to converge on these > >>>>>>>>> simulations. If you have any tips here, I'd appreciate them. > >>>>>>>>> > >>>>>>>>> I have attached 2 files, the first one (D3) is the DWSIM 3 file > >>>>>>>>> and the second one is the DWSIM 4 file. > >>>>>>>>> > >>>>>>>>> Thank you for your time, > >>>>>>>>> > >>>>>>>>> Hector D. Perez > >>>>>>>>> > >>>>>>>> > >>>>>>>> > >>>>>>> > >>>>>> > >>>>> > >>>> > >>> > >> > > > -------------- next part -------------- > An HTML attachment was scrubbed... > > ------------------------------ > > Message: 2 > Date: Thu, 4 Aug 2016 11:25:59 -0400 > From: Daniel Wagner <dan...@gm...> > Subject: [dwsim-users] DWSIM 4.0 Update 1 > To: "dws...@li..." > <dws...@li...> > Message-ID: > <CAJ3X9Upuce1QyoQRqafyM1rj10CWnfUx=twtzXaf4GGN6yo4tA@mail. > gmail.com> > Content-Type: text/plain; charset="utf-8" > > Dear users, > > An update for DWSIM 4.0 is available through the "Automatic Update" channel > (Edit > General Settings > Other > Enable Automatic Updates). > > This update fixes some problems that arise when you add an Adjust or Spec > logical block to the simulation and try to remove it, or save the > simulation. > > Please notice that the auto updater will only work if you have full write > access to the folder where DWSIM is installed. This is critical for users > running DWSIM on Windows 8 or 10. > > Regards, > Daniel > -------------- next part -------------- > An HTML attachment was scrubbed... > > ------------------------------ > > Message: 3 > Date: Sat, 13 Aug 2016 00:02:38 -0500 > From: Hector Perez <hpe...@gm...> > Subject: [dwsim-users] Inorganic Acid interaction parameters > To: dws...@li..., Daniel Wagner > <dan...@gm...> > Message-ID: > <CAKTRF=_GsPzTS=KpdicssgtUJj+H51TrMo=KfgWvyDkNqPohQg@mail. > gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hi Daniel, > > I have some thermodynamic interaction parameters for aqueous H2SO4 and > HNO3. I also have the pure component data for H2SO4. If you think this > could be of benefit for the program, how can I share these with other DWSIM > users? > > Thanks, > > Hector > -------------- next part -------------- > An HTML attachment was scrubbed... > > ------------------------------ > > Message: 4 > Date: Fri, 19 Aug 2016 19:04:58 -0500 > From: Hector Perez <hpe...@gm...> > Subject: [dwsim-users] (no subject) > To: Daniel Wagner <dan...@gm...>, > dws...@li... > Message-ID: > <CAKTRF=-DC+JBc4oRbnE3SSGH3QtXomUuTbAVDHPu > CA4...@ma...> > Content-Type: text/plain; charset="utf-8" > > Hi Daniel, > > I have attempted to replicate the electrolyte simulation from the wiki page > using the latest version of DWSIM 4 (version 10). Water calculations are > working well: pure water has a pH of 7 and as I change the Hydron molarity, > the pH changes accordingly. Unfortunately, once I add 2 M NaCl with the > same initial compositions as in the wiki, the solver fails to converge. > Everything looks the same as in the wiki, but the new equilibrium stream > composition is not updated, nor is the pH calculated right. Let me know if > I'm missing something. > > Thanks, > > Hector > -------------- next part -------------- > An HTML attachment was scrubbed... > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: electro.dwxmz > Type: application/octet-stream > Size: 14208 bytes > Desc: not available > > ------------------------------ > > ------------------------------------------------------------ > ------------------ > > > ------------------------------ > > _______________________________________________ > Dwsim-users mailing list > Dws...@li... > https://lists.sourceforge.net/lists/listinfo/dwsim-users > > > End of Dwsim-users Digest, Vol 13, Issue 2 > ****************************************** > |