Re: [dwsim-users] Dwsim-users Digest, Vol 13, Issue 2

[Mohamed T. <sag...@gm...>]

Greetings, pleas reactive my account .

بتاريخ ٢٠١٦/٠٨‏/٢٠ ٢:٠٥ ص، كتب <dws...@li...>:

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> Today's Topics:
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>    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
> >>>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>
> >>>>>>
> >>>>>
> >>>>
> >>>
> >>
> >
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> ------------------------------
>
> 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
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> 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
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> ------------------------------
>
> 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
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> End of Dwsim-users Digest, Vol 13, Issue 2
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