×
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

Shaft power

Shaft power

Shaft power

(OP)
hello

please, I'd like to ask some help
Seems to me a simple question, nonetheless I haven't found an asnwer nor in the forum nor in google.

Following is the question

Let's consider an axial fan.
Absorbed power is known.
How can I determine Shaft power ?

Many thanks

Wish to you all a Merry Christmas

RE: Shaft power

Absorbed power is input power.
Input power x motor efficiency = output power
Output power is shaft power.

Ted

RE: Shaft power

Shaft power is absorbed power + mechanical losses (bearings).
By the way If you have a gearbox between driver and driven you need to define if you are refering to which shaft.

Ps: this is a pumps topic....

RE: Shaft power

PaulLag,
What do you consider absorbed power and shaft power to be?

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

RE: Shaft power

Absorbed power or fan power is mechanical(fan) power imparted to working fluid+losses in working fluid. Which can be ΔP x flow/ fan efficiency. Shaft power is power in shaft, i.e fan power + bearing losses. Motor power is shaft power/motor efficiency,assuming no gearbox or belt.

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