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Latest News


January 11, 2023
Version 16.16 of DESIGN II for Windows is available... More

December 6, 2022
Please note that WinSim Inc. will be closed on the following days ... More

September 5, 2022
Please note that we do not sell SIM cards in Germany... More

March 18, 2022
Mr. Alfonso Cano will be attending the GCA Expo and Conference 2022... More

September 16, 2021
The documentation for DESIGN II for Windows has been updated... More

January 19, 2021
Updated the tutorial... More

February 18, 2020
The DESIGN II for Windows brochure has been updated... More

September 17, 2018
Free introductory training is available on Friday, November 2, 2018 in ... More

May 29, 2018
We have a new GDPR compliant privacy notice ... More

March 3, 2017
Please fill out the DESIGN II for Windows survey... More

November 21, 2016
WinSim is seeking a Project Sales Engineer ... More

November 21, 2012
WinSim is seeking Resellers for International Markets ... More



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WinSim's Process Simulation Latest News ( Archived News )


January 11, 2023 - Version 16.16 of DESIGN II for Windows is available for download now ! This is a release with both fixes and upgrades.
  • Added four Inline Fortran functions as stream properties:
    1. GET or SET Ambient temperature in R (AMB TEM)
    2. GET or SET Ambient pressure in psia (AMB PRE)
    3. GET Number of components (NCP)
    4. GET Current case study number (CAS NUM)
  • Improved the display of the timed update of dynamic results by having the stream and equipment stored results updated directly from the stored results in the flowsheet instead of the Design II output file
  • Added the display of only the first ten messages of each of the critical calculation warning messages when the mixture critical temperature and critical pressure calculations failed
  • Fixed a water dew point calculation issue due to improper solids handling in the dew point method
  • Fixed the vertical Tank unit module calculation for the initial time step given the liquid height specification and also fixed energy initialization
  • Fixed a Stream properties calculation issue via the Inline Fortran bytecode interpreter
  • Added a print of all the thermo options for each equipment and streaM
  • Miscellaneous small enhancements and fixes (see release notes )
Please note that the Password algorithm was changed for the 16.00 release. Your new password should have been emailed to the contact person for your account. If you need a new password, please contact Technical Support for your new password if you are on MSS or a Usage agreement.
December 6, 2022 - Please note that WinSim Inc. will be closed on the following days for the 2022 - 2023 holiday season:

Thursday, November 24, 2022
Friday, November 25, 2022
Friday, December 23, 2022
Monday, December 26, 2022
Monday, January 2, 2023


September 5, 2022 - Please note that we do not sell phone SIM cards in Germany. Users of the SIM cards from winSIM Deutschland ( https://www.winsim.de/ ) should contact their support at winSIM Kontakt ( https://www.winsim.de/kontakt ) .
March 18, 2022 - Mr. Alfonso Cano, Sales Associate of WinSim Inc., will be attending the GCA Expo and Conference 2022 from March 29, 2022 to April 2, 2022 in Galveston, Texas. Alfonso will be in booth 213. If you would like to get together to discuss DESIGN II for Windows at the conference, please send an email to Alfonso ( ALC@winsim.com ) or call him at 281-545-8200 x107.

Mr. Michael Lynn McGuire, President of WinSim Inc., will be attending the GPA Midstream 2022 Technical Conference from April 4, 2022 to April 6, 2022 in Oklahoma City. If you would like to get together to discuss DESIGN II for Windows at the conference, please send an email to Lynn McGuire ( LMC@winsim.com ) or call him at (832) 202-3918.

We would like to meet you if you are attending these conferences !


September 16, 2021 - Please note that the printed documentation for DESIGN II for Windows version 16 has been updated at documentation . The Adobe Acrobat versions of the manuals was included in the version 16.09 release of DESIGN II for Windows.

You can order printed copies of all five manuals at www.lulu.com (the URLs are on documentation ).


January 19, 2021 - The Design II for Windows tutorial has been updated at the WinSim Inc. Support page . Both YouTube and M4V versions are available.
February 18, 2020 - We have updated the DESIGN II for Windows brochure to update and add information about the latest release, version 16.0.

In addition to the various updates, we added pages 14 and 15 about the new Spreadsheet Unit Module and how it works with Microsoft Excel.


September 17, 2018 - We are offering free introductory training classes for DESIGN II for Windows at our office in Richmond, Texas. We still have 2 or 3 spots open for the class scheduled for Friday, November 2, 2018 at 8:30 am. Let us know by RSVP to admin if you are interested and we will send you a confirmation e-mail with directions.

Here are some comments from those in attendance at previous classes:

"Great overview of the capabilities of the software."

"Fast moving and very interesting."

"I have used the program for a while, but learned a lot from the training."

We also have an optional two hour hands on session on building a flowsheet after lunch for a maximum of six people who bring their laptops.

The class lasts a half day, from 8:30 am until 12:15 pm. Murugan Selvan, Ph.D. Chemical Engineering and head of our technical support staff will teach the class. The course is a very good overview of the capabilities of DESIGN II. The agenda for the session can be found at training agenda (70K Word document). We will try to adhere closely to the agenda to maximize the benefit of the class for all participants. If you are interested in more specific and detailed training, please e-mail WinSim Sales .

Please note that this class does contribute 4 to 6 hours towards the yearly requirements for the Texas board of Professional Engineers Continuing Education Program .

Please note that we are going to have a FREE Barbecue lunch after the training session. We would be pleased if you can stay to meet our staff and eat lunch with us.


May 29, 2018 - We have a new GDPR compliant privacy notice .
March 3, 2017 - If you have yet to do so, please fill out the DESIGN II for Windows version 15 survey .
November 21, 2016 - WinSim is seeking a Project Sales Engineer

WinSim Inc., a leading provider of process simulation software, is actively seeking a Project Sales Engineer. This person must have an intense desire to work in direct sales with a special emphasis on projects adding the Link2WinSim program into a customer's custom software.

The details are at: WinSim Process Simulation Jobs: Positions Available


October 17, 2014 - In the interest of visitor's security, we have converted the WinSim website to secure (https). You can be sure that any information submitted to us will be transmitted in confidence.
September 12, 2014 - We have added a contact list for some of the WinSim Staff .
November 21, 2012 - WinSim is seeking Resellers for International Markets

WinSim, a leading provider of process simulation software is actively seeking resellers. WinSim's software solutions are primarily used for Oil and Gas applications, but also have particular relevance in the petrochemical industries.

Benefits Include:

  • Discounts from WinSim list pricing.
  • Unlimited earning potential.
  • Free training at WinSim's office near Houston, Texas.
  • Technical and Sales support from WinSim.
  • Marketing materials. Brochures, manuals, demonstration passwords, etc.
  • Complimentary copy of WinSim's simulator Design II.
Here is what WinSim is looking for from prospective Resellers:
  • Excellent communication skills. Fluent in English and at least one other language.
  • Established connections in the Oil and Gas fields in your geographic location.
  • Must have the ability to understand and demonstrate WinSim's products. Process or chemical engineering background preferred.
  • Willing to travel to USA for training on WinSim products.
  • Motivated to close new business.
This is an excellent opportunity for motivated resellers. WinSim is serious about increasing our International business and we will provide you with the support necessary to succeed. Interested reseller candidates should contact WinSim's Sales Department .

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