The reciprocating compressor has a high exhaust temperature… Can’t find the cause; seeking help
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I have installed two new hydrogen compressors of model 2D32-14.7/20-90.4. When Unit A is in operation, the primary exhaust temperature is 100°C. When Unit B is in operation, the temperature of the exhaust gas at the first stage reaches as high as 125°C. One of the two compressors is in use while the other serves as a backup. The cylinder liners, piston rings, and support rings of Unit B have all been replaced; there are no issues with the cooling water, and the air valves have also been inspected and replaced. Yet the exhaust temperature remains very high. It has been operating at this temperature for several years now, but the cause cannot be identified… I don’t understand why compressors that are identical to each other can have such a large difference in exhaust temperature I hope everyone can help find the reason…
Check whether the exhaust pressure is also high and the compression ratio is elevated.
Generally, the outlet pressure at Stage 1 of Unit A is 4.2 MPa, while the outlet pressure at Unit B is 4.4 MPa; this represents the pressure of the gas after it has been cooled
I don’t know what the equipment looks like; in terms of the process, there are check valves and outlet check valves (which need to be tested for leaks using liquid)； For the equipment itself, it is necessary to check the cooling water jacket and ensure that the distribution of cooling water is sufficient; test for leaks in all valves, as well as examine the condition of the piston rings. The instruments also need to be checked. Additionally, can the traffic between the two devices be improved through adjustments to achieve better traffic balance? It would be best to send a live video for easier discussion.
1. Improve the actual operating parameters of the two compressors; I’ll do the calculations for you. 2. 125 is also within the acceptable range
The main checks involve the material of the valve disc, the springs, as well as the gap between the valve and the cylinder block; all of these issues can cause high outlet temperatures.
Generally, high temperatures indicate poor cooling or backflow of air through the valve; there’s no need to consider overly complex factors.
There is another issue: the buffer tank at the primary exit of Station B makes a loud humming sound… and no reason for it can be found
The cooling system has been checked, and several sets of air valves have been replaced, but the problem still persists
The cooling system was checked and there were no issues, and several sets of air valves were replaced, but the problem still persists…