×
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

Water turbines for injection wells

Water turbines for injection wells

Water turbines for injection wells

(OP)
Which type of turbine will be appropriate for injection well with diameter up to 350mm, and with groundwater lavel on 30 m deep?  Recharge (injection) rate can be 50 l/s. I never hear for injection well turbine, you? If that is not in manufacture, is it possible to modify deep well pumps to operate as turbine i.e. motor as generator?

RE: Water turbines for injection wells

I'm confused.
"is it possible to modify deep well pumps to operate as turbine i.e. motor as generator? " are you trying to pump water or generate electricity?

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Water turbines for injection wells

I'm confused too. Injection implies you are FORCING water back down the well, i.e. a geothermal or underground water table recharging system. All the pumps I have seen for that are above ground (if pumps are used at all, gravity is fairly reliable for moving water down hill). But if you are wanting to reclaim energy from water falling back down a well hole, then any submersible is technically capable of that, but many, if not most, do not like being spun backwards. This would take some very careful engineering.

What are you really trying to do?

"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
  
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies  

RE: Water turbines for injection wells

Find a three phase submersible pump that may be modified to pump down instead of up. Drive it with a VFD capable of regeneration and on-the-fly starting. Once the water is moving start the VFD and treat yourself to free energy.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Water turbines for injection wells

Hmmm... one can patent a bath tub as a bus bar, that doesn't mean it's going to work. I wonder if the holder of that patent ever tried it out? Seems a bit fishy to me.

"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
  
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies  

RE: Water turbines for injection wells

Try a search on "Flygt" submersible pumps. That company also makes a submersible water turbine that is rather widely used in small hydroelectric installations. This unit resembles a submersible pump, but is a small propeller type turbine driving an induction generator via an integrated planetary gearbox. The entire unit is under water, and has also been used installed inside vertical pipes.

It is a well-known company, I think from Sweden.

rasevskii

RE: Water turbines for injection wells

(OP)
Thanks!

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