What is the flow velocity range inside the tubes of a shell-and-tube heat exchanger?
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I would like to ask everyone: can the flow velocities of the fluids inside and outside the tubes in a shell-and-tube heat exchanger be considered in the same way as those in a tubular heat exchanger? The gas flow velocity in the tube side is 5–30 m/s, while the liquid flow velocity on the shell side is 0.5–1.5 m/s. The gas flow velocity can reach 34 m/s without significant pressure losses – is there a problem with that?
I don’t understand what problem these details are meant to solve.
First, it is necessary to check whether the material type imposes any restrictions on flow rates related to safety and erosion； Next, check whether it will cause vibration and damage to the heat exchanger ； Finally, check whether the voltage drop is acceptable. The gas flow velocity reaches 34 m/s – would you dare to do it with dry acetylene gas? One cannot generalize and ignore the specific properties of the medium!
The gas phase contains 79% hydrogen and 0.5% hydrogen chloride, along with small amounts of trichlorosilane, dichlorodihydrosilane, and silicon tetrachloride. How should this split flow rate be determined? Additionally, I’m not aware of the required flow rate for acetylene gas, but a flow rate of 15–30 meters per second is quite normal for natural gas.
The gas-phase component is mainly hydrogen, so a flow rate of 34 m/s in the tube side should be no problem.
If it’s mainly hydrogen, the level is a bit high