What could be the reason for high suction pressure and low superheat in a refrigeration compressor?
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The suction pressure of the screw refrigeration compressor is high, the slider load is 42%, and the superheat is only 0.4°C; it is not possible to increase the load any further. What could be the reason for this?
Is the exhaust pressure normal? If the exhaust pressure is low while the inlet pressure is high, it’s likely that the throttle valve is damaged. If both the exhaust pressure and the suction pressure are high, it is likely that there is too much refrigerant.
The exhaust pressure is normal, slightly lower than before; the liquid levels in the condenser and economizer are both normal
When you say the throttle valve is broken, are you referring to the poor throttling effect and the large amount of fluid flowing in?
Mm-hmm, you said the temperature rise is only 0.4, and the inlet pressure is a bit high; I think there’s some excess cold energy accumulating. If nothing else is wrong, it’s likely that the flow rate has increased, so I suggest you check the throttle valve.
1. Consider whether the refrigerant is carrying liquid, 2. Check the evaporator liquid level； 3. Check the flow rate and temperature of the hot material.