×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

CPA Cubic Plus Association Liquid-Liquid phase equilibria

CPA Cubic Plus Association Liquid-Liquid phase equilibria

CPA Cubic Plus Association Liquid-Liquid phase equilibria

(OP)
does Prode Properties require the same BIPs for vapor-liquid and liquid-liquid phase equilibria with CPA Cubic Plus Association ?

RE: CPA Cubic Plus Association Liquid-Liquid phase equilibria

CPA works as other EOS models in Prode (Peng-Robinson, Soave-Redlich-Kwong etc.),
Prode Properties allows to define one BIPs data set per each model (you can define different models for fugacity, enthalpy etc.) and stream,
for a vapor-liquid phase equilibria or a vapor-liquid-liquid phase equilibria normally one gets BIPs from VLE database (which includes a large number of BIPs, I think about 30000 or more),
for liquid-liquid phase equilibria or solid-liquid phase equilibria or hydrates there are specific databases (there are four databases, VLE, LLE, SLE, Hydrates)

to obtain accurate results with liquid-liquid (or solid-liquid or solid-vapor) phase equilibria I calculate the BIPs with the data regression procedure included in Prode, there are examples in the operating manual
http://www.prode.com/docs/pppman.pdf

RE: CPA Cubic Plus Association Liquid-Liquid phase equilibria

(OP)
actually I load BIPs for CPA from VLE database in Prode,
however, calculated liquid-liquid fractions are different from our reference while vapor-liquid is Ok,
what can I do for calculating the correct vapor-liquid and liquid-liquid fractions ?

RE: CPA Cubic Plus Association Liquid-Liquid phase equilibria

(OP)
Ok

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources

3D Scanning in the Automotive Industry
With over 100 years of production history, the automotive industry has been at the forefront of manufacturing technology since its inception. Whether the transformative technology of the day was the assembly line, the integration of robotics into the manufacturing process, or the switch from steel to aluminum frame chasses, the automotive industry has consistently implemented advanced technology into its manufacturing and production workflow to improve manufacturing and product performance. Today, the same is true. Download Now
Green light on lidar: Developing low cost systems for autonomous vehicles
Lidar has been around for quite some time, but to date, it’s been custom—and expensive. Right now, there isn’t a clear-cut solution that’s suitable for all applications, such as lidar in autonomous vehicles. As they explore options, optical and mechanical engineers are forced to make choices and tradeoffs during the design process. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close