Re: Shell and tube Heat exchangers

From:
<a href="http://www.process-cooling.com/CDA/ArticleInformation/coverstory/BNPCoverStoryItem/0,3668,29757,00.html">http://www.process-cooling.com/CDA/ArticleInformation/coverstory/BNPCoverStoryIt\ em/0,3668,29757,00.html</a>

"Floating Tube Sheet
The tube sheet at one end of a removable-tube bundle. The floating tube sheet always has a smaller diameter than does the stationary version. The floating tube sheet moves freely with the expansion and contraction of the tube bundle due to temperature changes in operation."

I confess that I don't know enough of the intricacies of heat exchanger design to be of more help.

Paul

> Lets say my design length is say, 8 feet. When and if, the whole
bundle gets put together, the end plates to which these tubes are welded to, need to accomodate for some thermal expansion, so as not to bend. I can calculate the change in length of the tube, due to the thermal expansion and temperature change, etc. From a design standpoint, do I design for the median temperature, or make the tubes shorter so no buckling occurs, remembering the ends are welded? Is there anything "unique" in the method of fabricating these?
>
> > Anybody with information on design of heat exchangers? I am
starting
> > out on a design, I am seeking some technical information, literature
> > or any other guidance on how to correctly determine the innner shell
> > tube lengths for a sanitary shell and tube heat exchanger(tubes to
be
> > built into a bundle). I would like to better understand thermal
> > expansion effects and properties, stress related effects on welded
> > ends, in order to prevent bending of the tubes. These tubes would be
> > welded into end plates and specifying the welds to stop leaks is a
> > concern.
>
>
> Mike, have you looked at some of the links at
> http://www.pipingdesign.com/exchangers.html ?
>
> Maybe this stuff is too basic for you, but if not, it's a good
starting
> point.
>
> Maybe also see this page:
> http://www.eng-tips.com/gthreadminder.cfm/lev2/16/lev3/58/pid/391 and
> ask there.
Received on Thu Jul 01 13:34:00 2004