What is the primary measure to prevent high discharge pressure in a refrigeration system?

Maintaining proper refrigerant charge is crucial for the efficient operation of a refrigeration system. When the refrigerant charge is within the recommended levels, it ensures that the system can effectively absorb and release heat. An improper charge, whether too high or too low, can result in suboptimal pressure levels throughout the system.

If there is too much refrigerant, it can lead to elevated discharge pressure because the compressor is trying to compress a larger volume of vapor than it was designed for; conversely, a low refrigerant charge can cause the system to operate at pressures that are either too low or cause the system to cycle excessively. Proper refrigerant charge not only helps in controlling discharge pressure but also enhances the overall reliability and efficiency of the refrigeration system. This is why regularly checking and maintaining the correct refrigerant charge is considered a primary measure for preventing high discharge pressure.