What is the purpose of a TEV in a refrigeration system?

The purpose of a thermostatic expansion valve (TEV) in a refrigeration system is to control the flow of refrigerant into the evaporator. This component is critical for maintaining the correct amount of refrigerant in the evaporator to ensure efficient heat absorption from the surroundings or the product being cooled. By modulating the flow based on the temperature of the evaporator, the TEV helps achieve optimal cooling performance and prevents issues like flooding or starvation of the evaporator.

In contrast, regulating condenser pressure is a function typically managed by the system’s compressor and other associated components rather than a TEV. Measuring system temperatures is performed by temperature sensors, and storing refrigerant is the role of designated accumulator or receiver components, not the TEV. Thus, the TEV's primary function is focused on the regulation of refrigerant flow, directly impacting the refrigeration cycle's efficiency and overall system performance.