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Waste Heat Recovery

evaporator waste heat boiler

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#1 Annafdz


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Posted 16 June 2021 - 06:05 AM

Hi, I am designing a the evaporator of a waste heat recovery for my final proyect degree and I've a few doubts:


I suposed it as a shell-tube heat exchanger, a "bare tube boiler" and I saw that a fire boiler has a steam drum in the top (water boiler too), what I want to know is if it's possible to have the water-steam separator inside the boiler, I mean, as a kettle design. 

Is it common? Or should I design the bare tube boiler as a heat exchanger conected to a steam drum?




#2 Pilesar


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Posted 16 June 2021 - 08:54 AM

Finned tubes are common when transferring heat from a gas to a liquid for more efficient heat transfer. The liquid would then be inside the tube and should not be boiled dry. Putting the gas inside tubes to boil water on the outside would likely have pressure drop issues for the gas due to the large volume flow of gas compared to the volume flow of water.

Edited by Pilesar, 16 June 2021 - 09:03 AM.

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