What is the role of a receiver tank in a refrigeration system?

The receiver tank serves a critical role in a refrigeration system by storing excess refrigerant and helping to maintain a consistent flow through the system. When the refrigerant vapor condenses into a liquid in the condenser, any excess refrigerant that cannot be immediately cycled into the evaporator is collected in the receiver tank. This ensures that there is a reserve of liquid refrigerant available, which helps to ensure the proper functioning of the evaporator by allowing for a steady flow of refrigerant as needed.

Additionally, the receiver tank allows for a certain amount of refrigerant to be held in reserve, which can help stabilize the pressures in the system. This balancing act prevents the system from becoming over-pressurized and ensures efficient operation. By maintaining an adequate supply of refrigerant, the receiver aids in optimizing the thermal efficiency of the entire refrigeration cycle.

Other choices do not correctly describe the function of the receiver tank. The receiver does not primarily store heat or act as a primary disconnect, nor does it filter contaminants from the refrigerant. These tasks are typically handled by other components in the refrigeration system, such as heat exchangers, electrical disconnects, or filters/separators.