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Latest News


January 10, 2020
Version 16.02 of DESIGN II for Windows is available... More

November 26, 2019
Please note that WinSim Inc. will be closed on the following days ... More

February 1, 2019
Mr. Lynn McGuire will be attending the Laurance Reid... 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

April 7, 2017
The documentation for DESIGN II for Windows has been updated... More

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

February 8, 2017
The DESIGN II for Windows brochure has been updated... 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 10, 2020 - Version 16.02 of DESIGN II for Windows is available for download now ! This is a release with both fixes and upgrades.
  • Added the capability for multiple inlet streams and multiple outlet streams for the spreadsheet unit module
  • Added support for 1024 character lines in the spreadsheet unit module for long path and file names
  • Fixed the validation logic in the Case Study Tables group to properly check the selected equipment or stream parameter and index for validity
  • Fixed the Excel transfer for the Stream Summary where the stream flowrates were blanks
  • Added thermodynamic stability analysis to the cubic equations of state for high CO2 mixtures with methane and water in high pressure at ambient temperatures from the GPA Research Report 120
  • Added a new rule in the thermodynamic flashes to check if the calculated dew and bubble points are inverted and should not be used for determining total vapor or total liquid mixtures
  • Fixed the GERG 2008 calculated k-values for highly pressured LNG (liquefied natural gas) to calculate the k-values correctly to indicate that the fluid is liquid rather than a vapor when the liquid density and vapor density values approach each other
  • 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.
November 26, 2019 - Please note that WinSim Inc. will be closed on the following days for the 2019 - 2020 holiday season:

Thursday, November 28, 2019
Friday, November 29, 2019
Tuesday, December 24, 2019
Wednesday, December 25, 2019
Wednesday, January 1, 2020


February 1, 2019 - Mr. Michael Lynn McGuire, President of WinSim Inc., will be attending the Laurance Reid Gas Conditioning Conference this month. 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.

Lynn will also be attending the GPA Midstream annual convention in April . 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 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 .
April 7, 2017 - Please note that the printed documentation for DESIGN II for Windows version 15 has been updated at documentation . The Adobe Acrobat versions of the manuals will be included in the version 15.07 release of DESIGN II for Windows.

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


March 3, 2017 - If you have yet to do so, please fill out the DESIGN II for Windows version 15 survey .
February 8, 2017 - We have updated the DESIGN II for Windows brochure to update and add information about the latest release, version 15.0.
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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