What is the function of the liquid receiver in a refrigeration system?

• A. To expand the refrigerant
• B. To store liquid refrigerant
• C. To compress the refrigerant
• D. To convert liquid to gas

Answer: (B)

The function of the liquid receiver in a refrigeration system is to store liquid refrigerant. This component acts as a reservoir that holds the refrigerant after it has condensed in the condenser and before it is supplied to the expansion device. The storage allows for a steady supply of liquid refrigerant to be available for the system to operate efficiently.

By maintaining a certain level of refrigerant, the liquid receiver ensures that the system can continuously provide the necessary amount of refrigerant to the evaporator. This helps maintain the desired cooling effect and enhances the overall performance and stability of the refrigeration cycle. Additionally, it can help in managing fluctuations in refrigerant flow rates during varying operational conditions.

Other functions mentioned in the options are performed by different components in the refrigeration system. For instance, the expansion device is responsible for expanding the refrigerant, while the compressor compresses the refrigerant to increase its pressure and temperature. The conversion of liquid to gas occurs in the evaporator when the refrigerant absorbs heat from the surroundings, which is not the role of the liquid receiver.