Whether the tube bundle of the heat exchanger can be arranged eccentrically relative to the shell
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When designing the heat exchanger, in order to arrange the anti-collision plate, I want to move the center of the tube bundle downwards. This will cause the tube bundle and the shell to be non-concentric. Is this allowed? This post was last edited by www557 on 2009-3-26 21:12 ]
This kind of structure cannot be considered. There are many tubes on one side and few tubes on the other side. The heat exchange is very uneven and it is easy to short-circuit. Besides, it is very troublesome to manufacture. There are many forms of anti-collision plates. They can be welded to the cylinder or fixed to the tube bundle. Stainless steel pipe sleeves can also be added to the heat exchange tubes for protection.
Why set it off-center? I don’t know what the original poster thought about it?
Will it cause vibration if set eccentrically?
There are eccentric structures. For example, heat exchangers with evaporation spaces or heat exchangers in refrigeration devices all have eccentric structures. But it doesn’t seem to make sense because the anti-impact plate is off-center. No matter what, we can't reverse priorities.
There is such an eccentric structure, but it is not necessarily for the purpose of setting up anti-collision plates.
One more point, if such eccentricity occurs, will it cause asymmetrical or partial pipe routing?
Eccentricity is possible, but GB151 cannot be calculated, and other methods need to be used.
In order to arrange the anti-collision plate, a row of heat exchange tubes can be reduced at the shell side entrance (under the condition of ensuring the heat exchange area). This is an axisymmetric tube layout. GB151 can be calculated, but the empty space cannot be too large (k
It is not recommended to do this. It is better to lay out a few less rows of pipes on the side of the anti-collision board.
Whether it is eccentric or not has no direct relationship with whether SW6 can be calculated. SW6 cannot be calculated because when K>1, the 4732 module is needed to calculate it.
It can be eccentric, but it is not recommended to do it as it will affect the heat transfer effect.
Eccentricity must have an impact, because if the eccentricity is too large, the deflection of the fluid on the shell side will be large, which will have an adverse effect on heat transfer.
Eccentric structures are also possible. Just don't get too partial. Generally speaking, equipment such as evaporators and horizontal equipment can be appropriately eccentric. Otherwise, the only option is to enlarge the shell. The general principle is to arrange them as evenly as possible.
Yes, many times in the heat exchangers designed by our factory, the tube bundles are eccentric with respect to the shell, which must be considered from the perspective of structure and performance.