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!

*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.

Jobs

Cool water for condenser with waste energy

Cool water for condenser with waste energy

(OP)
I have a cooling system in a power plant that operates on water based cooling tower. The inlet temperature into the condenser is around 20c. I have a lot of waste heat and low pressure steam. I would like to use the thermal energy to chill the water down few degrees.
The cooling system mass flow is around 3 m3/s.

Possible?

RE: Cool water for condenser with waste energy

Firstly you already have extremely cold cooling water temperatures into your condenser. In the USA, Gulf-Coast area one would expect evaporative cooling tower exit temperatures of 30 to 33 deg C. You can try an absorption type refrigeration unit. However, you will need to check your own energy balance as the "energy" from the steam and "extracted" from the cold water must now be taken up by your cooling water system. It almost seems as there will be a net loss there; but you will need to check your own energy balance.

Good luck.

Gerry Hartmann
BS ChE NCSU

RE: Cool water for condenser with waste energy

One way that you could use steam to cool the cooling water would be to pull vacuum on the water with an ejector.
It would take a tank and some careful level control but you could vaporize some water off your cooling water and make it a little cooler.
However with 20C cooling water I would not bother.

Probably a better way to use the heat would be an ammonia boiler to generate some power????

Regards
StoneCold

RE: Cool water for condenser with waste energy

It sounds like you might have the wrong kind of steam turbine for your plant's needs.

Are you operating a steam turbine in a variable extraction configuration ?

http://books.google.com/books?id=hA129h8dc1AC&...

Or is this an older non-extraction steam turbine that was re-used from some other service ?

What is the range of "waste heat" that you are trying to harvest as compared to main steam flow ?

MJCronin
Sr. Process Engineer

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


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