×
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

Contaminated heating/cooling fluid

Contaminated heating/cooling fluid

Contaminated heating/cooling fluid

(OP)
My process heating and cooling fluid has become contaminated.  Normal fluid is a mixture of propylene glycol and water.  Some small amount of hydraulic fluid has entered the closed loop system.  Actual percentage of contaminant being analyzed now.   Outside winter temperatures proving to be no problem with plant equipment, worried if system will loose efficiency when warm weather returns.  How can I gage a rough estimate of any potential decrease in heat transfer efficiency based on the oil that is now part of the fluid?

RE: Contaminated heating/cooling fluid

If you know the percentage of contamination, you can find specific heat of the oil and reduce heat transfer as a ratio of (original specific heat/new specific heat).

The oil will also have different viscocity characteristics than the glycol mix that will influence the film coefficient which will affect heat transfer and change the pumping horsepower.

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