Regarding the issue of no water hammer occurring in cryogenic systems using heat exchangers with U-tube liquid seals
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We know that water hammer can occur easily when there is a two-phase flow of liquid and gas in the pipeline, so the steam condensate must be drained promptly. Then, for the condenser that condenses the steam at the top of the tower, which is also a two-phase gas-liquid system, will water hammer occur? Is there vibration? In some condensers, the liquid at the bottom is used, along with a liquid seal, to ensure thorough gas condensation; then, could this U-shaped liquid seal cause water hammer? Or is there a risk of water hammer, but since there are no valves in the heat exchanger’s process fluid, there will be no sudden changes in fluid flow rate, and thus no water hammer? Is water hammer more likely to occur in these gas-liquid two-phase flows when using air cooling?
With a liquid seal in place, steam can be contained, and water hammer will not occur; it works on the same principle as a check valve.
It won’t happen if the temperature difference doesn’t exceed a certain level
Hello, I have a high-temperature heat transfer oil tank, and the pressure switch located above it is producing very loud knocking sounds. It seems that the noise is coming from the M20 pipe section between the valve and the pressure switch. Is there any way to resolve this issue?
I also have the condenser installed vertically; the liquid inside the condenser mixes with the gas above the tank, generating noise, which causes the pressure switch to change state in response to that noise. I can’t find any solution to this problem – I’m at a loss
It’s supposed to be related to instrumentation, but I don’t really understand it either. Ask if adding an isolation tank to the instrument would help.