Regarding heat transfer issues!
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The flow of both fluids in the heat exchanger can reach turbulent conditions, which is beneficial for heat transfer
That's right. However, in shell-and-tube heat exchangers, this is often impossible, because the flow rate depends on the flow volume, and the flow volume is determined by the thermal balance. In contrast, shell-and-tube heat exchangers can easily achieve a situation where the flow of both fluids within the heat exchanger is turbulent.
:)I think it’s okay. The fluid in the shell side of a fixed-tube-sheet design can also reach a turbulent state; as for the tube side, there’s no need to say anything
Yes, in this way, both fluids can achieve a high heat transfer coefficient.