What causes such a large pressure difference between the outlet of the pressurization side and the inlet of the expansion side?
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This post was last edited by you*n*nyou on 2011-12-26 at 18:52. Our factory recently replaced the heat exchangers behind the two compressors. Before putting them into use, we checked for leaks and confirmed that there were none. However, one hour after the expansion machine started operating, the pressure behind the compressors increased from an initial value of 0.013 MPa to 0.4 MPa compared to the pressure in front of the expansion machine (it’s the pressure difference, right — Youyu). As a result, we were forced to shut down the system for heating. Has anyone encountered a similar situation? What causes the pressure difference?
This leak testing process is different from actual operation; at least in our factory it is different
Check whether the filter in front of the expander is clogged or deformed
Check whether the pre-filter before the expansion end inlet is clogged, and whether the high-pressure heat exchanger is leaking
It can’t be a leak in the heat exchanger, right? The pressure of pressurized air is higher than that of water. If water seeps into the air side before driving, and then water is blown into the plate cooler right after driving starts, there shouldn’t be an hour left for it to freeze slowly, right? Is it driving in hot weather? It’s hard to say about driving in hot weather; the temperature gradually drops. It’s probably still blocked by some mechanical impurities, right?
Which brand’s equipment? Please tell me the phone number secretly: 18202241586. If you really want to resolve a serious problem, contact me. Hehe
Let’s talk about it first. Replacing the heat exchanger isn’t a solution; there’s no need to do that as long as there’s no leakage. Under normal conditions for CO2, check the filter and also examine the water circuit. Is there any dew point analysis? Does the filter contain molecular sieve powder? I’m talking about the situation where there are no design issues, haha
Reply to 5# sjdy-520: Let me add that operating the machine at normal temperature should not cause blockages at the front of the machine, as the temperature is normal during operation. Once the expander starts rotating, if there is a leak in the heat exchanger, moisture will enter the expander along with the air and then be blown into the distillation tower. So I think the reason for the increased pressure difference can’t be a water blockage. It’s better to heat it up first and see if any impurities are blown out from the outlet.
1. Verify whether the measurement point is accurate. 2. Check for any leaks. 3. Check for any blockages
First, check whether there is a leak in the cooler after the booster Check the filter again
Reply to 5# sjdy-520 regarding your opinion that the booster compressor cooler cannot leak – I think it is possible, for example, based on the principle of the vacuum pump