What is the primary function of a TEV in refrigeration systems?

The primary function of a thermal expansion valve (TEV) in refrigeration systems is to control the refrigerant flow. It regulates the amount of refrigerant that enters the evaporator based on the system's cooling demand and helps maintain optimal system performance. By adjusting the flow, the TEV ensures that there is just enough refrigerant for efficient heat exchange in the evaporator, maximizing the cooling effect while preventing issues like flooding or starvation of the evaporator.

In refrigeration systems, effective control of refrigerant flow is crucial for maintaining desired temperatures and ensuring energy efficiency. The TEV also helps protect the compressor from liquid refrigerant, which could cause damage if not properly managed. Therefore, its role is fundamental in balancing the system’s operational parameters, making it the key component in controlling refrigerant flow.