Air Inlet Anti-Icing Systems
The ambient air contains moisture which condenses at a given temperature. Icing fog has been reported down to –12°C.
Cooling towers and steams effluents can be transformed in super-cooled droplets which solidify instantly when touching objects or surfaces. The air velocity is increasing towards the compressor bellmouth and accelerating drastically within possible closed guide-vanes to reach depression values at which moisture can possibly form ice. Ice is dangerous for the turbo-machinery.

Self-Cleaning filters
Although, correctly designed self-cleaning filters can prevent air inlet blockage and ice formation within the ducting, the closure of the guide-vanes remains a risky zone.

Multi-Stage filters
The multi-stage filter, with their higher inlet air velocities do block with ice. Heat must be injected if environmental icing conditions can prevail
Donaldson supplies a variety of means to inject heat within the air systems either upstream or downstream the air-filters. It can be hot compressed GT bleed air systems with adequate silencing features, low pressure air injection from generator cooling or any type of heat exchanger using hot water or steam….