Deaeration systems (definition)

Deaeration systems in heating systems — these are devices and methods designed to remove air and gases from coolant in the heating system. The purpose of deaeration is to prevent the formation of air locks and corrosion, improve the efficiency of the system and extend the service life of the equipment.

Deaeration systems: main aspects

1. Principle of operation:
   • Removing air: Deaeration involves processes that allow air dissolved in the coolant to come to the surface and be removed from the system.
   • Elimination of gases: Dissolved gases such as oxygen and carbon dioxide, which promote corrosion, can also be removed.
2. Types of deaeration systems:
   • Mechanical deaerators: Use physical methods such as centrifugation or turbulent motion to separate air from liquid.
   • Automatic air vents: They are built into the heating system and automatically remove air that accumulates in pipes and radiators.
   • Deaerators with membrane: Used to remove gases using semi-permeable membranes that allow gases to escape but retain liquid.
   • Gas separators: Equipment that separates dissolved gases from the coolant and removes them.
3. Advantages:
   • Preventing air locks: Air pockets can block the circulation of the coolant and reduce the efficiency of the heating system.
   • Reducing corrosion: Removing oxygen and other gases reduces the risk of corrosion of internal system components such as pipes and radiators.
   • Improving efficiency: Clean coolant without air ensures more stable and efficient operation of the heating system.
4. Components:
   • Deaerator: The main device, which can be installed as a separate unit or built into the system.
   • Automatic air vents: Devices that are installed at key points in the system to remove air.
   • Filters and separators: Used for additional removal of particles and small bubbles from the coolant.
5. Installation and maintenance:
   • Installation: Deaeration systems can be integrated into the heating system when it is installed or added later. It is important to correctly place the devices in places where air accumulates and to ensure their access for maintenance.
   • Service: Requires regular inspection and cleaning of air vents and filters to ensure proper operation.
6. Flaws:
   • Additional costs: Installation and maintenance of deaeration systems can increase the initial cost of a heating system.
   • Energy costs: In some cases, deaeration may require additional energy to operate the equipment.

Deaeration systems play an important role in maintaining the reliability and efficiency of the heating system, preventing problems associated with air and gases in the coolant.