×
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

Batch Heat Transfer

Batch Heat Transfer

Batch Heat Transfer

(OP)
I have a rectangular rail car that has a batch of vessels inside with fluid. Outside of the rail car is insulated with 1/2 pipe coil on each side(not on ends or top). Water or steam will be pumped through the coils to heat the fluid in the vessels.  The fluid is not agitated and it will remain stationary on the car during heating.  How can I determine the appropriate heat transfer coefficient for this and determine how long it will take to heat this up reasonably?

RE: Batch Heat Transfer


In what heat transfer class or text book did this homework problem originate?

RE: Batch Heat Transfer

(OP)
This is not a homework problem, I am actually trying to do this in my job and have looked at many textbooks to try to find answers but am having a hard time.

RE: Batch Heat Transfer

I agree with Montemayor that this Idea is bad enough to have come from a text book.  The obvious answer is that the stationary liquid side is the controlling element in the heat transfer equation.  So you need an equation for convective heat transfer from the rail car wall to the bulk liquid.  The heating rate will be slow.  Just a guess would be 10 to 15 BTU/hr*ft2*F.


Regards
StoneCold

RE: Batch Heat Transfer

try batch processes in the following book:
Process Heat Transfer by Donald Q. Kern

saludos.
a.

RE: Batch Heat Transfer

There are a lot of these type railcars out there.  As a sanity check, it took about 4 hours to heat the rai cars from 70 F to 130 F with steam to get the wax crude to flow out the cars.

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