What term is used to describe the pressure zone where the inlet to the thermostatic expansion valve and the discharge of the compressor operate?

The term used to describe the pressure zone where the inlet to the thermostatic expansion valve and the discharge of the compressor operate is the high side. In refrigeration and air conditioning systems, the high side refers to the part of the system where the refrigerant is under high pressure. This includes components such as the compressor discharge, condenser, and the expansion valve inlet.

The high pressure in this zone is crucial for the efficient functioning of the refrigeration cycle, as it allows for the refrigerant to release heat in the condenser before it reaches the expansion valve. Understanding these zones is essential for diagnosing, servicing, and optimizing HVAC systems.