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


cooling system

cooling system

cooling system

Hi everyone,
I am trying to design a cooling system, which contains a big container inside it static fluid, and I have to design pipes go through the big container,the pipes should have cold liquid inside it and this liquid has velocity, I know for the pipes I have to use the following formula:
q= m*cp*(T1-T2)
My question is how can include the material of the pipe which should be important? because the previous formula involve cp for the liquid only?

RE: cooling system

Any text with the title Process Heat Transfer will answer your question. The calculation of the overall heat transfer depends on three resistances. one of those resistances has the thermal conductivity of the pipe metal.

RE: cooling system

its natural convection, the formula you just mentioned is not that...

RE: cooling system

Actually, it's both; convection between the flowing fluid in the pipe to the pipe wall, conduction through the pipe wall, and convection from the outside of the pipe to the static liquid. The equation presented appears to be a Joule heating equation, which is a tiny portion of the overall problem.

Convection is of the form:
q = area*convection_coefficient*delta_temp

Conduction is of the form:
q = area*(thermal_conductivity/thickness)*delta_temp

Your equation:
q = mass*heat_capacity*delta_temp is used to determine the amount of heat to be removed. However, your large container has its own thermal losses, which include a convection-conduction-convection pathway, just like the pipe inside.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm

RE: cooling system

Keep it up.

RE: cooling system

Ummm...what are you saying, elmafulk?


"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]

RE: cooling system

One equation and 5 unknowns.

Perhaps just a bit more information is needed.

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!


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