What is the primary purpose of a compressor in a mechanical cooling system?

The primary purpose of a compressor in a mechanical cooling system is to cause the refrigerant to flow in the system. The compressor is a vital component that takes low-pressure refrigerant vapor from the evaporator and compresses it into high-pressure vapor. This process results not only in an increase in pressure but also helps to circulate the refrigerant throughout the system.

As the refrigerant is compressed, its temperature rises, which sets the stage for heat exchange in the condenser. By creating a pressure differential, the compressor ensures that the refrigerant flows through the entire system, allowing it to absorb heat from the environment in the evaporator and subsequently release that heat in the condenser. This flow is essential for the refrigeration cycle to function effectively, making the compressor a key element in mechanical cooling systems.

While other options may describe functions related to the refrigerant or the system, they do not encompass the primary role of facilitating the flow of refrigerant, which is crucial for the operation of HVAC systems.