What separates the high and low side of the refrigeration system in operation?

In a refrigeration system, the separation between the high and low side is primarily defined by the components that regulate the flow of refrigerant throughout the system. The correct choice highlights the role of the metering device and the compressor discharge valve.

The compressor discharge valve is where refrigerant exits the compressor, entering the high-pressure side of the system. This indicates that the refrigerant has been compressed and is in a gaseous state at high pressure. The metering device, typically located between the high side and low side, regulates the flow of refrigerant into the evaporator. It reduces the pressure of the refrigerant, which transforms it into a low-pressure, low-temperature liquid as it enters the evaporator.

Thus, the function of the metering device alongside the compressor discharge valve is crucial in defining the boundary between the high-pressure side and the low-pressure side in a refrigeration cycle. This effectively ensures that the system can maintain its intended operation, facilitating heat exchange and cooling processes.

The other options do not accurately describe the components that delineate the boundaries between the high and low sides of the refrigeration system. The condenser and evaporator are integral components of the system but do not serve the role of providing separation as defined within the context of high and low