×
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

pressure variation

pressure variation

pressure variation

(OP)
we had a doubt about the given data as suction pressure is 59 meteres above the mean sea level..? if we calculate this with p=qgh it is not matching..and one thing is as the altitutde increses gradually the pressure has to decrease but if we apply the same formula how will it match ...?

RE: pressure variation

It should match provided you take correct density, acc. due to gravity and height of air column. But you have a simple formula to check atmospheric pressure roughly.

P = 29.92 - 0.001H where P = atmospheric pressure in inches of Hg, and H = height of the area from MSL in feet.

So for 59 meters it is 29.92 - (0.001 x 59 x 3.28)= 29.72 inches of Hg. (or 755 mm of Hg)

Check this with your barometer.

Regards,

RE: pressure variation

sudershanm, what are you talking about? It seems like there's about two paragraphs worth of explaining missing...

RE: pressure variation

Her is a quick way of figuring out pressures in feet of water which you can easily convert to metric.
   14.69psi*144 sqin/sqft/ 62.4 lbs/cu.ft= 33.9 feet of water or 406.8 inches of water.  Therefore you have
 27.69 inches of water per psi.
 You can do the conversion!!!

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