Overall heat Transfer Coefficient for a Graphite Condenser

Of course, the obvious answer is to ask someone who makes (and sells) them.

Otherwise, look at materials web sites.

This doesn't seem like a good application for graphite composites. They don't like water.

I forgot to add, the water has hydrochloric acid also in it.

We're choosing graphite over glass here.

Ah. So it's not water. It's aqueous hydrochloric acid instead. What strength?

About 20% by weight. Manufacturer says about 100 W/m2K. Don't you think it is too low keeping in mind the U for SS in a similiar set-up is 1000-4000 W/m2K?

<...I am trying to find a good approximate value for the H.T. coefficient for a shell and tube Heat Exchanger where I am trying to condense water 20% hydrochloric acid at about 50 deg C (reduced pressure) with water at about 15 deg C.

I am able to find these coefficients in various chemical and mechanical engineering handbooks. But they don't mention a MOC of the condenser. I assume they mean Steel:Steel?

Please help....>

Is this correct?

HTCs depend upon, among other things, fluid composition, velocity, and turbulence as well as wetted material thermal conductivity and thickness. It is not possible to give a reasonable respoinse to the other questions without a detailed look at the geometry of the heat exchanger, for which the manufacturer is in the best position to advise. In particular, it would be crucial to know that 20% hydrochloric acid is the process fluid, rather than water.

One presumes the manufacturer's telephone number is to hand? After all, one wouldn't want to over- or under-size the exchanger for the process application, the details of which have not been shared with the forum; presumably they are commercially sensitive.

yes

:)

I know this company; Contact them and they will be able to help you.

www.graphiteindia.com

provide the exact thermal data. Flow rates ,temepratures and properties. I will do approx preliminary design for you.

Hello! I am having the same problem as Zasmine had. Thankfully, I got some great suggestions here. I hope more discussions will further help me. Thanks!