In refrigeration systems, which component typically operates at high pressure?

In refrigeration systems, the condenser is the component that typically operates at high pressure. The primary function of the condenser is to convert refrigerant vapor into a liquid by dissipating heat to the surrounding environment. This process occurs after the refrigerant has absorbed heat from the low-pressure side of the system, specifically within the evaporator, and then is compressed by the compressor, raising its pressure and temperature.

Once the refrigerant enters the condenser, it is under high pressure, which allows it to release the absorbed heat efficiently as it transforms from a vapor to a liquid state. This high-pressure condition is essential for effective heat exchange and for maintaining the thermodynamic cycle of the refrigeration system.

In contrast, the evaporator operates at low pressure as it absorbs heat from the environment, while the expansion device reduces the pressure of the refrigerant before it re-enters the evaporator. The expansion valve, as part of the expansive device, specifically regulates the flow of refrigerant entering the evaporator and also operates at lower pressure. Therefore, the condenser is uniquely characterized by its high-pressure operation within the refrigeration cycle.