Water-cooled chillers employing low-pressure refrigerants operate below atmospheric pressure, particularly during idle periods or when the system is not at full load. This sub-atmospheric condition presents a unique challenge: air and other non-condensables can infiltrate the system through minute leaks in gaskets, fittings, or even the metal itself. The presence of these foreign substances negatively impacts chiller performance. For example, air accumulating in the condenser raises the condensing pressure, decreasing cooling capacity and increasing energy consumption. Other contaminants, such as moisture, can lead to corrosion and refrigerant breakdown.
The maintenance of a hermetically sealed system is paramount to efficiency and longevity. Non-condensables not only diminish cooling effectiveness, leading to higher operating costs, but also accelerate equipment degradation. Historically, manual venting was employed to remove these substances, but this method proved inefficient and resulted in significant refrigerant loss. The implementation of a dedicated system addresses these shortcomings by automating the removal process, thereby minimizing refrigerant waste and ensuring consistent system performance. It protects capital investment by preventing internal damage caused by contamination.
