High/low condensation pressure due to various factors: water, heat, air intrusion, refrigerant, settings, load
Подробности дела
Answer: The reasons for the high pressure of the water-cooled condenser are:
- Insufficient cooling water and too high water temperature;
- Small heat transfer area of the condenser;
- Air intrusion into the refrigerant system (caused by the rupture of the evaporator copper tube);
- The volume of the condenser shell is small, the effective heat transfer area of the stored refrigerant liquid is reduced or the refrigerant is overfilled;
- The water condenser has been used for too long, and the copper tube water side surface is scaled;
- The automatic water volume regulating valve is open to a small degree or damaged;
- Refrigerant oil enters the refrigeration system;
- The cooling water pipe is not properly arranged, resulting in poor cooling water return;
- The refrigerant passage or components (drying filter, solenoid valve, capillary tube, etc.) are blocked;
- The dryer is overloaded, which increases the evaporation pressure and the condensation pressure.
The reasons why the condensing pressure of the air-cooled condenser is too high are:
High ambient temperature or poor ventilation;② Dust and dirt on the surface of the condenser;③ Too much load on the dryer;④ Air intrusion into the refrigerant system;⑤ Insufficient heat transfer area of the condenser;⑥ Small air volume of the cooling fan;⑦ The installation position of the dryer is incorrect (such as close to the heat source, exposed to direct sunlight, the distance between the front and back of the dryer is too close, etc.);⑧ The pressure switch controlling the fan is improperly set or damaged;
⑨ The refrigerant passage or component is blocked;⑩ The refrigerant is overfilled, reducing the heat transfer area.
The reasons why the condensing pressure of the condenser is too low are:
① Too much cooling water or too low water temperature;
② The ambient temperature is too low;
③ The pressure switch controlling the fan or the automatic water volume regulating valve controlling the cooling water is improperly set or damaged;
④ Too little refrigerant filling;
⑤ There are leaks in the refrigerant pipeline or component;
⑥ The load of the dryer is too small.
Generally speaking, a slightly lower condensing pressure will not have a significant impact on the operation of the dryer and refrigeration system. However, too low a condensing pressure may sometimes cause the evaporation pressure to drop, resulting in frost in the evaporator and even "liquid compression" of the compressor, which needs to be prevented.
