Hairpin Heat Exchanger preferred tube layout pattern
Hairpin Heat Exchanger preferred tube layout pattern
(OP)
Hi,
What could be the technical reasons when someone says, "the preferred tube layout pattern for hairpin heat exchangers is 90 degree" ?
What are all the reasons that make the 90 degree tube layout pattern suited for hairpin heat exchangers ?
What could be the technical reasons when someone says, "the preferred tube layout pattern for hairpin heat exchangers is 90 degree" ?
What are all the reasons that make the 90 degree tube layout pattern suited for hairpin heat exchangers ?





RE: Hairpin Heat Exchanger preferred tube layout pattern
You need a square pitch with open lanes if you need to clean the shell side of the bundle.
I have seen various TCP layouts with different tube spacing also based on shell side flow.
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P.E. Metallurgy, Plymouth Tube
RE: Hairpin Heat Exchanger preferred tube layout pattern
Since they are true countercurrent HXs, does the tube pattern really make any significant difference ????
http://www.kochheattransfer.com/products/brown-fin...
MJCronin
Sr. Process Engineer
RE: Hairpin Heat Exchanger preferred tube layout pattern
For fouling service, tube pitch should also be 1.25x tube od.
RE: Hairpin Heat Exchanger preferred tube layout pattern
Thank you for your valuable replies and insights into my query.
I could gather that the main reason for 90 degree tube layout is mainly for cleaning purposes!
But, is there more of a mechanical or thermal design reasoning behind this idea ?
I would request your expert comments on this.
Thank you again!
RE: Hairpin Heat Exchanger preferred tube layout pattern
You can get the same thermal performance and mechanical characteristics through the design.
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P.E. Metallurgy, Plymouth Tube
RE: Hairpin Heat Exchanger preferred tube layout pattern
a) Shellside htc is the lowest when compared to the other patterns
b) Tube count is also lower for a given shell dia and given tube pitch, so overall surface area is lower than for others.
90deg square pattern is chosen only for shellside mechanical cleaning purposes.