👉 The pre-fluid, also known as the pre-condensable fluid or residual fluid, is a mixture of gases and liquids that remains trapped in the insulating layers of a refrigeration system before it reaches the compressor. This fluid, which can include gases like water vapor or hydrocarbons, and liquids like oil or coolant, acts as an insulator, significantly impeding heat transfer efficiency. When the refrigerant undergoes phase changes within the system—evaporating or condensing—it interacts with this pre-fluid, affecting the overall performance and efficiency of the refrigeration cycle. Proper management of the pre-fluid is crucial for optimal system operation, as it can lead to increased energy consumption and reduced cooling capacity if not adequately addressed.
