Heat exchanger design issues
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Dear Haihao friends: I recently encountered a question while designing a heat exchanger, and I would like to discuss it with everyone. As shown in the figure: This heat exchanger is a heating unit for heat networks; water flows through the tube side, while steam flows through the shell side, using the steam to heat the water in the tube side. Due to constraints such as limited space for the equipment, the shell side cylinder is designed as a tapered cylinder (large diameter 2100, small diameter 1800). When using SW6 for calculations, the following issues arise: (1) What diameter should be chosen for the cylinder? If a larger diameter tube sheet is selected, the thickness will increase; if a smaller diameter is chosen, the calculation for the cylinder body becomes unreasonable. (2) How is the calculation for this type of diameter-changing section carried out? With a conical head? Or a half-wave expansion joint?
Refer to GB16508 for calculating the diameter-changing section
It can be calculated using components; select conical shell calculation
Fixed tube sheet heat exchanger? At a glance, it’s again someone who relies on software rather than adhering to the standards; the standard definitions state that theoretical models are not applicable in cases of variable diameter in the shell side
Could you please tell me where in the explanation this issue is mentioned? :) Thank you
Could you please tell me where in the explanation this issue is mentioned? :) Thank you
The interpretation of GB/T151 explicitly states that it does not apply to \"fixed-tube-sheet heat exchangers with a skewed cone in the shell side.\" I believe that in the existing structure, it is mainly difficult to accurately determine the impact of deformation and stress in the diameter-changing section on the original stress calculation formulas for fixed tube sheets.
I’m quite lazy and don’t like to answer; you can look it up in the book yourself
Why use a variable diameter? Just use two small heat exchangers in series!
Can the gas phase space considering phase transitions be used in series?