×
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

EPAnet/Hydroneumatic Tank

EPAnet/Hydroneumatic Tank

EPAnet/Hydroneumatic Tank

(OP)
First timer here and looking forward to all the great insite.  I am currently learning the process it takes to set up a water distribution model in EPAnet.  I have a solid understanding of most things with this program but I am having difficulties modeling a Hydroneumatic Tank.  I am currently using a elevated storage tank to represent the Hydroneumatic Tank since the elevated storage tank allows me to apply an initial, min and max level (or in other words a certain pressure or head).  In the specs they call out that the design pressure on site is 55 psi, therefore I have converted this to head (127.05 ft.) and used that as my "initial" level in the storage tank.  I have also set my pumps to turn ON if the Hydroneumatic Tank initial level drops below the 127.05 ft, that way my Tank/site maintains a pressure of 55 psi.  Is this the best way to do this and does it correctly represent the way a Hydroneumatic Tank works?

Thanks
 

RE: EPAnet/Hydroneumatic Tank

A hydro tank can be simulated by a tall and very skinny tank that gets skinnier as it rises in elevation, you can do this with a tank curve, in the curves section.
This is because it will take less gallons to raise the pressure a set value in the top end as it does as the tank level is lower.  Although this can be considered polishing the cannonball.  More polishing, if you consider the temperature of the air in the tank to be adiabatic or isothermal, most likey someplace in between, Isothermal is easier (p*v = const)

I would also base the pump 'call' on the actual pressure switch location, since there may be some distance between the hydro tank and the pump, again polishing.

Hydrae

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