×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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.

Students Click Here

Centrifugal Compessor - High suction temperature

Centrifugal Compessor - High suction temperature

Centrifugal Compessor - High suction temperature

(OP)
The application at hand involves a beam style inline multistage centrifugal compressor handling
a flow of 50,000 Nm3/hr of process gas with a pressure ratio
of 1.5 .The process gas temperature at suction is a high 180 degree
Celsius.
what effect will such a high suction temperature have on the compressor selection/
operation.I have run the estimator provided by Elliot and they have
a model for this process requirement but could not find one at dresser-datum.
need help to confirm material,reliability and other issues of running at such a high suction temp.

RE: Centrifugal Compessor - High suction temperature

Is this an API617 application ? New application or existing equipment? What type of process gas (hydrocarbon, acid gas ?) will be compressed, what is the MW and inlet pressure ?
Temperature increases quickly with higher molecular weights, you should at least indicate the discharge temperature which is the worst case... just common sense so to say. What type of shaft end seals do you have : dry gas seals or labyrinths ?
Without the minimum of technical background on the application itself how can you expect useful orientation ?

180 degree C is not only high as suction, but is already high as discharge for a single shaft centrifugal compressor.
if you are using dry gas seals, you are at the commonly accepted temperature limit in terms of what dry gas seals can handle on suction side and definitely you will be exceeding it on the discharge side for an inline.
If you are using labyrinths at shaft ends, same rule applies as for others labyrinths in the rotor and it will all depends from the magnitude of your discharge temperature to define what are the elements that needs more close attention and what will qualify or not, but here again definitely uncommon suction temperature.

What is the rational behind this temperature, is it to have the gas superheated because of dew point issues ? or because someone just got a brilliant idea to drop out a process cooler from the plant or the process flow diagram ?

RE: Centrifugal Compessor - High suction temperature

(OP)
This compressor is for a feasibility study so information is kind of sketchy.
The Gas is Hydrocarbon with a MW around 20.
The compressor type is supposed to be 617 , chapter 2 , with dry gas seals .
am not really sure if a 617 chapter 3 machine is suitable here , but considering the
low pressure ratio and similar flow , that might just work out.suction is at 20 bar(a).
Regarding the high temp and lack of coolers at the inlet , this was taken up
with the process guys but have not got a favorable response till now.

RE: Centrifugal Compessor - High suction temperature

Try a double flow type single shaft compressor with 6 impellers of 300-350 mm. discharge will be about 220-225 degC. speed about 13500 rpm.

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! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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