In most commercial refrigeration systems, where is the excess refrigerant that is not being used stored?

• A. Gas accumulator
• B. Liquid receiver
• C. Refrigerant storage tank
• D. Condenser

Answer: (B)

The main idea is that there is a dedicated storage vessel for liquid refrigerant in a commercial refrigeration loop. After the condenser, liquid refrigerant needs a place to accumulate so the system can supply a steady flow to the metering device even when demand fluctuates. That storage role is filled by a liquid receiver, a vessel placed in the high-pressure liquid line before the expansion device. It acts as a reservoir, helping maintain proper charge and ensuring a continuous supply of liquid to the evaporators while also allowing any vapor that may be present to separate before the liquid reaches the throttling device.

The other options don’t fit this purpose. A gas accumulator is used on the suction side to capture non-condensable gases and prevent compressor issues, not to store excess liquid. The condenser’s role is to condense refrigerant vapor into liquid, not to store it. A refrigerant storage tank isn’t a standard component in the operating cycle of a commercial system; the function is performed by the liquid receiver.