In a pump overfeed system, which component directly interacts with the liquid feed?

In a pump overfeed system, the component that directly interacts with the liquid feed is the pump. Pumps are designed to move liquids from one location to another by increasing the liquid's pressure. In the context of a pump overfeed system, they are responsible for taking the liquid feed from a source, such as a storage tank, and delivering it to the desired destination, typically an evaporator in a refrigeration system.

Understanding the role of pumps in this process is critical, as they ensure that the correct amount of liquid refrigerant is fed into the evaporator at the required pressure and flow rate. This interaction is vital for the efficient operation of the system, as it directly influences the system's capacity to absorb heat and maintain thermal balance. Proper pump operation is essential for the overall efficiency and effectiveness of the refrigeration cycle, making it the central component that interacts with the liquid feed.