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Submitted Chris Haslego, Nov 21 2011 11:21 AM | Last updated Nov 21 2011 01:29 PM




Category: Heat Transfer Technology
Question: Is it ever advantageous to use shells in series even though it may not be necessary?
Keywords: shell,tube,heat,transfer,exchangers,series,advantageous
Answer: Usually you design for the least number of shells for an item. But there are times when it is more economical to add a shell in series to the minimum configuration. This will be when there is a relatively low flow in the shell side and the shell stream has the lowest heat transfer coefficient. This happens when the baffle spacing is close to the minimum. The minimum for TEMA is (Shell I.D./5). Then adding a shell in series gives a higher velocity and heat transfer because of the smaller flow area in the smaller exchangers that are required. Source: Gulley Computer Associates


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