×
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

Cent. Compressor Driver Sizing

Cent. Compressor Driver Sizing

Cent. Compressor Driver Sizing

(OP)
Hello everyone,

Can each one share his experience over the selection of Centrifugal Compressor Driver size?

Fixed Speed Motor, 10% above the Max absorbed POWER?

VFD- Motor, should the compressor designed to deliver the Max flow at 105% speed curve? also, shall the Motor and VFD system sized at the 105% speed curve of the compressor?

Also, what's the basis for GT's and Steam Turbine?

RE: Cent. Compressor Driver Sizing

Sizing according to what API ?
Basically 10% margin above max absorbed power (at motor shaft) of any of the specified operating conditions this is acc. API617.
VSD or fixed does not matter apart any start up issues that you have to be aware of. 10% margin when its a steam turbine.
Gas turbine : power is what you get at site that's it

RE: Cent. Compressor Driver Sizing

(OP)
Ok..Thank you,

The issue now is, If you have the Max Operating Power located at the 100% speed curve, if you applied the Affint. Laws as:

( Power@105% speed/Power@100% speed)= (105% speed/100% speed)^3....

The result Power is way above the Driver sized Power....

Does the VFD needs to have +Power Margin at the 105% speed curve, no matter if there is no process operating point alocated at the curve??

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