×
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

Heat Dissipation Rates
3

Heat Dissipation Rates

Heat Dissipation Rates

(OP)
We have to support the riser of an exhaust for an Emergency Generator at a temperature of 1000 F and we are planing to use a stanchion under the bottom elbow. However, I am concerned about the heat transfeer from the exhaust to the pipe stanhion and to the structure. Does any one know how to calulate the heat dissipation and therefore determine the length of the pipe stanchion which will be insulated for personal protection?

Thank you   

RE: Heat Dissipation Rates

If the supports are connected to a non combustible wall I would not worry about it.

Does the stack go up and clear over hanging eaves?

Take the "V" out of HVAC and you are left with a HAC(k) job.

RE: Heat Dissipation Rates

To test this, put a torch at the end of a similar pipe held vertically and "feel" the temp at a distance from the source. If the stanchion is steel,the temperature will dissipate rapidly.

RE: Heat Dissipation Rates

I did some remote gen stations up by James Bay before, I looked at the drawing, Critical silencer was about 10 inches off a wall. The silencer was the 90 dgeree bend up.

A lot of emergency standby gens here, last job was a pair of 1000kW prime, dual exhausts, I made a metal heat shield with stand off spacers for an air space behind, where it was near the eaves so it would not radiate on a roofing membrane, but no problems otherwise for a non-combustible wall.

Take the "V" out of HVAC and you are left with a HAC(k) job.

RE: Heat Dissipation Rates

If the stanchion is stainless steel,the temperature will dissipate even more rapidly.  Stainless is a poor conductor of heat.

RE: Heat Dissipation Rates

Specify pipes with min of 2" calcium cilicate insulation.

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