Problems with ammonia synthesis chillers
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Why does the load on the chiller decrease by 10% or 20%, and after waiting half an hour or an hour, the load automatically return to 100%?
The load on the ice machine is primarily determined by the production load of synthetic ammonia; when this production load reaches 100%, the load on the ice machine increases accordingly. Conversely, as the ammonia production load decreases, the load on the chillers also decreases.
I’m not sure whether what the original poster means by “reducing the chiller load by 10% or 20%” refers to a change in the indicator value of the chiller’s slide valve or to a change in the actual load of the chiller Changes in the indicator of the chiller’s slide valve usually indicate a problem with the instrument or the slide valve itself, while changes in the actual load of the chiller may be caused by an increase in the pressure of gaseous ammonia after the chiller reduces its load – in other words, an increase in the inlet pressure of the chiller leads to an increase in its load.
It means manually reducing the load by 10-20%; the gauge and display also show that the load has been reduced. But after waiting for a while, the gauge and display indicate that the load has returned to 100%, without anyone making any adjustments in between. I asked an experienced technician, and he said it was a mechanical issue.......
Mechanical problems are the most likely cause; the ice maker’s adjustment is done manually. When manual adjustment isn’t possible, this situation occurs – either the gauge shows incorrect readings, or the control valves might be loose and not secured properly due to vibrations.
It should be a mechanical failure of the ice machine. Possible reasons include: 1. Spool valve operation, 2. Fault in the solenoid valve assembly, 3. Excessively high fuel injection pressure, 4. The fuel inlet valve for the oil piston being opened too wide
The load of the ice machine is determined by the load of the ammonia evaporation unit; the pumping state of the ice machine is merely an apparent phenomenon. If the load on the external unit changes, the load on the chiller will naturally change as well.
Based on the additional information provided by the poster, it can be confirmed that there is oil leakage in the energy valve of the chiller. The slide valve in the chiller is driven by oil pressure; its working principle is similar to that of a solenoid valve, as it uses the different directions of incoming and returning oil to control the movement direction of the slide valve. When oil leakage occurs in the energy valve, the slide valve will start to move. Solving the problem is simple: remove the energy valve to check and clean out any debris; if the valve core is worn out, simply replace it.
It’s probably due to the reason mentioned on floor 8; I’ve also encountered the problem of the chiller automatically increasing its output (with older 8AS17 chillers), and this is caused by the capacity distribution valve increasing the flow automatically.
I’ve read the responses from several people and found them very insightful; however, it would be better if the original poster could explain things more clearly next time, as what was said at first glance is quite frightening.
Thank you all for your helpful advice. I’ve learned a lot here; next time I’ll make sure to describe my questions in more detail