Which statement is true regarding the economizer of a packaged water chiller?

The statement regarding the economizer that is accurate is that the economizer does not eliminate liquid carryover to the compressor. In refrigeration systems, an economizer is designed to use low-temperature refrigerant vapor to pre-cool the liquid refrigerant before it enters the evaporator. This process can enhance efficiency, but it does not guarantee that all liquid refrigerant is removed or that there will be no carryover.

In many systems, especially if not optimally designed or operating under certain conditions, some liquid refrigerant may still make its way into the compressor. The risk of liquid carryover depends on the specific design of the system and how well it is operating. Therefore, while the economizer contributes to enhancing system performance by providing better heat exchange and increasing efficiency, it does not fully prevent the potential issue of liquid carryover to the compressor.

Understanding this detail emphasizes the operational considerations of using an economizer in chiller systems and highlights the importance of monitoring and maintaining proper conditions to minimize any liquid refrigerant issues.