Reasons for reduced liquefaction efficiency

There should be less Freon, the suction pressure is 0.05, and the temperature should be around -27 degrees.

This post was last posted by limingshuguang on 2009-10-18 08:35 The editor first asks you whether the Freon level in the liquefaction tank has dropped compared to before? If it drops, it means there is a lack of Freon. Another possibility is that the chlorine part of the liquefaction tank is blocked by acid mud, so we have to stop it and take it apart to take a look. Before disassembling, check whether the exhaust pipe is blocked and whether the pressure is lower than before?

This post was last edited by limingshuguang on 2009-10-18 08:36. I think there are several reasons for this phenomenon, which can be investigated one by one. 1. The liquefier is blocked: The chlorine part of the liquefier is clogged (pipe side) and the heat transfer effect of Freon is reduced. It needs to be stopped for inspection. 2. The effect of reducing the total amount of Freon leakage is poor. 3. The refrigeration oil in the unit is brought into the liquefier, which blocks the heat absorption of Freon and reduces the liquefaction efficiency. You can stop the unit to drain the oil. But I think the first reason is more likely as you said.

Check whether there is any fluorine leakage. The fluorine level in the liquefier is not normal. Measure the temperature of the liquefier

This post was last edited by limingshuguang on 2009-10-18 08:37.: There is a leak in the Freon low-pressure system. It is not the Freon leaking out but air entering the system, causing the cooling energy of the system to decrease. ； Solution: 1) Detect leaks and deal with leaks ； 2) Bleed the air out of the system. Alternatively, you can first remove the air from the system. If it works, it must be the reason I mentioned. In addition, I want to say that the liquefaction efficiency of your system has not decreased, but the refrigeration efficiency has decreased. For reference only.

Judging from the data provided by the poster, the suction pressure is 0.05MPa, which should normally be 0.1~0.15MPa, the exhaust pressure is 0.99MPa (it is difficult to define due to the influence of cooling water), the exhaust temperature is less than 64°C, which is not consistent with the exhaust pressure, and the motor current is only 220A, indicating that the refrigerator is basically unloaded. In other words, the liquefier is not working for some reason. The poster explained that the compressor suction temperature is -22°C, and it is confirmed that the Freon level in the liquefier is normal, indicating that the system does not lack refrigerant and the liquid level is not false. The only remaining explanation is that the tube passage of the liquefier is blocked, causing the heat exchange area to gradually decrease, and eventually the heat exchange capacity is lost, that is, the chlorine gas is no longer liquefied. The main reasons why chlorine cannot be liquefied by heat exchange due to its ability to occupy the heat exchange area are:: 1. The liquid chlorine drain port is blocked, liquid chlorine cannot be discharged, and a large amount of liquid chlorine occupies the pipe side. 2. The raw chlorine is too dirty, and a large amount of acid mist and acid mud carry steel corrosion and block the shell side heat exchange tube, causing this failure. 3. Too much non-condensable gas accumulates in the liquefier, occupying the heat exchange area. The poster can make a targeted analysis and specifically investigate the chlorine system problems, and there is no need to doubt the Freon system.

I agree with the 7th floor's opinion. It should be a problem with the chlorine gas channel, and there is a high possibility that the chlorine gas is clogged.

I don’t think the chlorine channel of the liquefier is blocked. If the chlorine channel is blocked, the suction pressure and suction temperature should both be low. But judging from the parameters provided by the poster, there should be a problem with the content volume ratio adjustment mechanism. Adjust the content-to-volume ratio. If it cannot be adjusted, stop work for inspection.

This post was last written by quhong* ng80 edited on 2009-10-22 23:33 The tail chlorine is 96.5%, indicating that almost chlorine is not liquefied in the liquefier. There are several reasons.: 1. The heat exchange effect of the liquefier is not good, and the pipe layer is severely clogged (this possibility is unlikely. This can only happen if it is almost completely blocked, so the original chlorine pressure should change). 2. Low-temperature Freon does not enter the liquefier, so that the chlorine gas is not liquefied. Check the inlet and outlet of the Freon into the liquefier (mainly check whether the solenoid valve is malfunctioning) 3. The liquefaction temperature is not enough (depending on the poster’s premise, but the suction temperature has increased, and the liquefaction efficiency will not be so low when it reaches -16.9) 4. The liquid chlorine drain port is blocked (in this case, the tail chlorine will be discharged by liquid chlorine, and whether the pipeline is frosted) 5. The original chlorine is communicating with the exhaust gas distribution platform, so that the raw chlorine directly enters the exhaust gas distribution platform, check the connected valve

It is because the liquefaction efficiency has decreased in a short period of time. I think blockage is not the main reason.