Tube buckiling in Shell & tube HX (UHX13 & TEMA 7-24)
Tube buckiling in Shell & tube HX (UHX13 & TEMA 7-24)
(OP)
In the mechanical design of Shell & Tube Heat Exchangers with fixed tubesheets, there is a problem with tube buckling, when calculations are made for the fixed tube sheet design. (ASME - UHX.13.5.9 and TEMA RCB-7.24).
How can I avoid this problem? I have tried to decrease the unsupported span length but with no success, and expansion joint is not allowed for this equipment.
Best regards,
How can I avoid this problem? I have tried to decrease the unsupported span length but with no success, and expansion joint is not allowed for this equipment.
Best regards,
G





RE: Tube buckiling in Shell & tube HX (UHX13 & TEMA 7-24)
-Christine
RE: Tube buckiling in Shell & tube HX (UHX13 & TEMA 7-24)
StoneCold.
RE: Tube buckiling in Shell & tube HX (UHX13 & TEMA 7-24)
Thanks for your comments...!
GH
RE: Tube buckiling in Shell & tube HX (UHX13 & TEMA 7-24)
There are various alternate solutions to your dilemma. However, like most queries, you don't furnish any basic data or scope - fluid ID, pressures, temperatures, restricted to Shell & Tube design, etc. Without any of this data, any response is subject to your rejection or opposition. This thread will extend for days without any useful information or resolution being reached.
I could suggest (if you have to use a 1-pass, shell & tube) that you employ a TEMA BEP, BES, or BET but you might not like them. I could also recommend a spiral; but you might reject this also. Without specifics on the application and any restrictions imposed, it is difficult (or frustrating) trying to contribute useful or helpful information.
As Stonecold infers, a U-tube would resolve the situation. A U-tube unit is not restricted to only 2-passes. You can have multiple passes in a U-tube unit. But is this allowable?