Ice Protection - Gas Turbine Inlet Systems
GE carries out extensive test and development work to ensure that the effects of icing on filter elements are minimized. However, for sites that are prone to ice build-up we would normally recommend de-icing or anti-icing equipment.
Anti-icing systems are designed to prevent the conditions that will allow the formation of ice in the inlet. De-icing systems are designed to stop the build-up of ice on a particular surface. This is normally achieved by 'traceheating' the surface with self-regulating, resistance-heating cable.
The Altair product line includes a number of anti-ice systems, but they all follow the basic principle of heating the inlet air. Most commonly, the inlet air is heated via the addition and rapid mixing of a hot air stream. This stream, which can be a hot bleed from the turbine compressor, warm air from the turbine enclosure, air that has been heated by the turbine exhaust, or hot/warm air from some other source, is introduced into the inlet (normally upstream of the filter system) through a carefully designed distribution manifold.