Luftentgasung

Luftentgasung refers to the process of removing dissolved or entrained air from liquids, primarily water, in technical systems. This is crucial for preventing various issues that can arise from the presence of air. In heating and cooling systems, for instance, air bubbles can reduce heat transfer efficiency, lead to corrosion by increasing oxygen content, and cause noise due to cavitation. In industrial processes, the presence of air in liquids can interfere with chemical reactions, affect product quality, or damage equipment.

The methods for Luftentgasung can be broadly categorized into physical and chemical approaches. Physical methods include mechanical venting, where air is physically released from the system, often through manual or automatic vents. Another common physical technique is vacuum degassing, which lowers the pressure above the liquid to reduce the solubility of gases and allow them to escape. Thermal degassing also utilizes heat to decrease gas solubility. Chemical methods involve adding substances that react with dissolved gases, effectively removing them from the liquid phase. However, these methods are less common for general water treatment compared to physical ones, as they can introduce other substances into the fluid.

The choice of Luftentgasung method depends on factors such as the type of liquid, the volume of the system, the operating temperature and pressure, and the required level of gas removal. Effective Luftentgasung contributes to the longevity of equipment, improves system performance, and ensures the reliability of industrial processes.