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!

*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.

Jobs

Modelling of HPRT in HYSYS

Modelling of HPRT in HYSYS

(OP)
Hi,

I am trying to model a Hydraulic Power Recovery Turbine (HPRT) in a Steady State simulation on HYSYS. As far as I can think I have two options to do it:

a) Use a PUMP module. When the simulation converges the Pump icon is outlined with a yellow line around the pump icon with a warning "negative head". However the corresponding value of the shaft power appears to be OK ignoring the negative sign prefixed to it

b) Use an EXPANDER module. When the simulation converges, the Expander icon is outlined with a yellow line with a warning "liquid in inlet stream". I guess it is becuase an Expander on HYSYS is meant only for vapour / gas. However the corresponding simulated value of power appears to be OK

Is any one of the above approaches is appropriate to model a HPRT or is there any thing wrong in the the above approaches towards modellin a HPRT on HYSYS? If so then what would be an appropriate method to simulate a HPRT?

Thanks in advance :)

cheers

RE: Modelling of HPRT in HYSYS

if you have only liquid with similar densities an (equivalent) pump model (considering dH) should give reasonable values,
if you wish to model change of phase, dV etc. a compressor ( expander ) model is more appropriate,
for those cases I have a specific model in PRODE PROPERTIES (compressor & expander with vapor + liquid),
may be you have something similar to select.

RE: Modelling of HPRT in HYSYS

(OP)
Thanks Chemlite for the response. However the requirement is to work on HYSYS only for this project.

RE: Modelling of HPRT in HYSYS

the answer is generic about pump model available in most simulators (as for expander model)
since this is a chemical process engineering forum with contributes of CHEMCAD, PROII, VMGsim, Prode etc. users, you may expect responses from users of different software,
if you wish to limit responses there is a specific group devoted to aspen products.

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


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