Issues related to the calculation of the area at the tube sheet split point
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Hello, everyone! Below are the left/right tube sheets of a fixed 4-pass shell and tube heat exchanger. Regarding the formula for calculating the area Ad at the tube sheet division point, what does n’ represent – the number of tube roots on one side of the partition (GB/T151 P76-77)? Should this value be taken from the left tube sheet or the right tube sheet? What exactly should n’ be? Thank you all!
This heat exchanger is a fixed-tube-sheet type heat exchanger, with a total of 74 heat exchange tubes. 16/42/16 on the upper/middle/lower sections of the left tube sheet, 37/37 on the upper/lower sections of the right tube sheet; what is the specific value of n’? Thank you! .
I think the calculation should be done at all 3 partition locations, with the areas added together. What the program needs to calculate is the area that is not supported by the heat exchange tubes; even if there is no partition there and an empty area remains, that area should also be included in the total.
May I ask what the specific value of n’–, that is, the number of tubes along one side of the partition, should be? For details, refer to GB/T151 P77: Ad=n'(Sn*S-√3/2S^2). In this formula, only the value of n' is not yet determined
May I ask what the specific value of n’–, that is, the number of tubes along one side of the partition, should be? For details, refer to GB/T151 P77: Ad=n'(Sn*S-√3/2S^2). In this formula, only the value of n' is not yet determined
May I ask what the specific value of n’–, that is, the number of tubes along one side of the partition, should be? For details, refer to GB/T151 P77: Ad=n’(Sn*S−√3/2S^2). In this formula, what value should n’ take?
Count it twice: 11 for the slot in the middle partition, and 10 for the slot in the side partition.
Calculate separately for Sn1 and Sn2
Three calculations are needed. Every area without pipes must be counted, regardless of whether it has left or right tube sheets. According to the definition, it is the area that cannot be supported by the heat exchange tubes due to the need to install partition plates and tie rod structures. In other words, what matters is not whether a partition is installed or not, but rather whether it is supported by the heat exchange tubes.