Tuesday, November 8, 2011

My first heat exchanger sizing, question about temps?

Okay I have my first HX sizing for a homework problem, and I have h and k values so I can find overall U. The problem I'm having is the fact that I'm given little info for the the delta T, I'm told I want to vaporize 6,000lb/hr methanol by ping steam through the shell side of a double-pipe HX (both components are at atmospheric pressure and steam condenses through the HX). I can use a steam table, but what about the methanol? How am I supposed to find the temperature when it's entering the exchanger?

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