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

Heat transfer project

Heat transfer project

(OP)
University project: So we have been asked to design a rig which basically tests insulation properties of a material. I have been tasked with coming up with a mathematical model to predict temperatures. Unluckily, we will be taught heat transfer in the next semester and I have very minimal knowledge about the subject. I need help, or formulae, to predict the temperature.
Set up:
Heat source ::(a)Insulation Material(b):: Heat/Temperature Detector
I want to know how can I predict the temperature on (b)side of the insulation wall.

RE: Heat transfer project

YJ97, At least you were forthright that this is homework. Most students try to hide their questions by making it sound as though it is something they are dealing with in industry. This site is NOT for homework assistance! The science and mathematics of heat transfer is very complicated to fully analyze. If you are in an engineering heat transfer class, you will find that out in short order. However, if you are looking at a 1-dimensional steady-state problem, the equations simplify considerably. Do a little research on conduction through a wall.

RE: Heat transfer project

For a straight convective heat transfer, the equation is very simple. Finding the parameter to fir the data is the hard part. I would start with Wikipedia:
https://en.wikipedia.org/wiki/Convective_heat_tran...
https://en.wikipedia.org/wiki/Heat_transfer_coeffi...

Then work your way up:
http://www.cheresources.com/content/articles/heat-...
http://facstaff.cbu.edu/rprice/lectures/htcoeff.ht...

Simplistically, you can start off with
heat_transferred = area*heat_transfer_coefficient*delta_temperature for the convective part.

Transfer THROUGH your insulation is conductive heat transfer:
heat_transferred = area*thermal_conductivity*delta_temperature/insulation_thickness

Assuming you design the test fixture adequately, it'll depend mostly on area and thickness of the insulation, and the fact that conservation of energy means that the heat transferred across each interface is exactly the same, so you can set up the two simultaneous equations to solve for the temperature and amount of heat transferred, assuming that the hot side of the insulation is fixed at a known temperature, and the air is a known temperature

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: Heat transfer project

(OP)
Thanks IR, I'll look into it.

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