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Arun Bandyopadhyay
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Join Date: Jun 2009
Posts: 2

Heat Exchangers Thermowell

07/20/2012 10:10 AM

Wake frequency calculation of Thermowells for Heat Exchanger Shell and Tube side nozzles are required or not. In practice we do not undertake these calculations. I am not having suitable reasons for this. The nozzle is designed keeping in mind vibration associated with velocity of the flluid, then why we don't undertake vibration calculations for Thermowells. Can any one help me clarify this?
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Pathfinder Tags: heat exchanger Thermowell Vibration
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bigg
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Join Date: Jun 2010
Posts: 1296
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#1

Re: Heat Exchangers Thermowell

07/21/2012 4:44 PM

If other codes and standards do not apply (TEMA or API for example), I would think you would use the same criteria as for thermowells in piping.
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Ian Purdie
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Join Date: Sep 2009
Location: Adjacent to the brick fields in Beds
Posts: 63
#2

Re: Heat Exchangers Thermowell

07/22/2012 5:15 AM

It all depends on the conditions. If the velocity is less than 0.64m/s [2.1ft/sec] then a calculation - according to the ASME 19.3 standard - is not required. I have never heard, or come across a WFC for a heat exchanger, but there's always a first time.
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Crabtree
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Join Date: Jul 2007
Location: Commissariat de Police, Nouvions, occupied France, 1942.
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#3

Re: Heat Exchangers Thermowell

07/22/2012 4:51 PM

They are so rigid that a vibration calculation is meaningless. I mean, do one yourself and see.

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