If there is a restriction in the refrigerant liquid line of a water chiller, what is the expected outcome?

A restriction in the refrigerant liquid line of a water chiller leads to a situation where the flow of refrigerant is impeded. This restriction causes a decrease in the amount of refrigerant entering the evaporator, which results in less refrigerant vaporizing and absorbing heat. As a consequence, the refrigerant returning to the compressor is less saturated and has a higher temperature than it normally would in a properly functioning system.

This phenomenon is referred to as high suction superheat. It indicates that there is more heat absorbed by the refrigerant in the evaporator than what can be effectively managed, leading to fewer refrigerant molecules carrying out the intended heat transfer process. The increased suction superheat can also lead to potential overheating of the compressor, reduced efficiency, and added wear and tear on the system.

Understanding this aspect is vital for operating and maintaining refrigeration systems efficiently, as a restriction in the refrigerant liquid line can drastically impact the overall performance and reliability of the chiller.