Maximum/minimum flow velocity issues for Crossflow and window in HTRI calculations
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During the HTRI calculations, in the descriptions of the calculation results regarding flow velocity, the values are as follows: Velocities, m/s – Min: 1.27, Max: 1.28 for Tubeside; Min: 0.39, Max: 0.76 for Crossflow; Min: 0.69, Max: 0.87 for Window. For Crossflow, there are both a maximum and a minimum flow velocity. Where do these maximum and minimum velocities occur, and which one has the greatest impact on heat transfer? The same issue exists with window streams as well; I’m seeking advice from the experts here*. Thank you.
Tubeside: The minimum and maximum velocities on the tube side are derived from the incremental 3D data, and they represent the calculated minimum and maximum velocities at the tube surface. Crossflow: The minimum and maximum crossflow velocities on the shell side are obtained from the incremental 3D data, and they represent the calculated minimum and maximum effective (B-stream) crossflow velocities. Window: The minimum and maximum velocities within the window area on the shell side are taken from the incremental 3D data, and they represent the calculated minimum and maximum effective window velocities. The effective window flow takes into account both the B-stream and the total or partial C-stream.
These values are related to the heat exchanger configuration you choose, such as: shell diameter, heat exchange tube diameter, tube spacing, arrangement pattern, baffle type, baffle spacing, degree of baffle notching, and the distance between the tube bundle and the inner diameter of the shell.