Why does a reciprocating compressor experience surging?
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Whenever the TSA pre-treats the chiller, the compressor experiences surging, which lasts for about a minute before it settles down. Some say it’s resonance; could any expert explain this?
Surge is an inherent characteristic of centrifugal compressors; I haven’t heard that reciprocating compressors can also experience surge
I’m not familiar with the processes involved in this area. Could it be that changes in load during the switching process lead to variations in the overall piston force, thereby causing an imbalance in forces that results in vibration?
Main reason: During cutting, the pressure at the inlet and outlet of the reciprocating machine fluctuates significantly, causing changes in piston force and resulting in abnormal noises； When cutting, the composition at the inlet and outlet of the reciprocating machine changes, and abnormal noises occur due to changes in the condition of the medium inside the cylinder.
Has the pressure to enter the factory been very low during this period, or has it been quite volatile?
Could you describe the specific situation accurately? For example, how pressure changes, how flow rate changes, and the conditions of compressor vibration and whistling. The issue of surge in reciprocating compressors has come up on forums before; I recall that a knowledgeable expert also mentioned in his online materials that surge in reciprocating compressors is more severe than that in centrifugal compressors, and therefore more attention needs to be paid to it during design. But I have never encountered it in practice. So, I want to find out.
Is it related to the intake pressure and intake volume? Surge usually occurs due to insufficient gas flow. Our compressors have never experienced surge, but the pressure-boosting end of the expander has had surge issues, and that was also due to inadequate gas flow. :)
During TSA pretreatment of the chiller, pressure fluctuations at the inlet of the reciprocating compressor cause stress on the compressor piston as well as changes in the compression and exhaust processes, resulting in abnormal noises； Changes in the temperatures of other components or gases at the inlet and outlet of the TSA (temperature-sensitive adsorption) compressor cause changes in the composition of the compressed gas within the cylinders, as well as deviations from the compressor’s design parameters, which results in abnormal noises.
Is your Chetta running when the compressor is started? Is it possible to have a pulsating phenomenon?
Import and export pressures fluctuate, but not significantly.