Control air system
The pressed air for
the control air system is supplied from the starting air system via one of the
two sets of reduction valves or from the operating air system. In both cases,
the compressed air usually passes through the control and air drying unit before
being distributed to the various services. In the case of a sample, a
refrigerant-type system is used for air purification and drying.
Example of a control air system
It is very important that only dry air is supplied to
the control air system, as condensed moisture will adversely affect the
efficiency of the controls.
The refrigerant dryer uses a refrigeration system to
reduce the temperature of the compressed air to 2-5 ° C below the dew point of
the air. Excess water vapor condenses and is separated from the air. The cooled
air is then heated before being fed to the control air system.