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Environment:
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Arctic and extreme cold weather areas
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Location:
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Typically latitudes above 50° North
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Land Use:
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Oil production activities including electric power
generation, gas compression, crude oil pumping.
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Weather:
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Blowing snow. High winds. Hoar frost. Ice fog. Summertime
insect swarms in some areas.
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Temperature:
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-40° to 68° F (-40° to 20° C) |
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Types of dust:
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Silica. Quartz. Carbon. Iron. Iron oxide. Sodium.
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Dust Concentration:
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0.01 - 0.25 mg/m3
0.004 - 0.10 gr/1000 ft3
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Particle Size (µm):
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1 - 15
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Potential damage to gas turbine:
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Wet corrosion. Foreign object damage due
to ice ingestion. Excessively high inlet restrictions due to snow / ice
plugging of air intake paths.
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Recommended Gas Turbine Inlet Air Filtration System:
Self-Cleaning
Pulse Filter
Experience shows that self-cleaning pulse filter inlet air systems efficiently remove hoar-frost and precipitate ice from the filter cartridges in much the same way that they clean themselves of dust.
It has also been shown that, when ambient air is supersaturated, the air downstream of the filter cartridges is just at the frost point, indicating that frost is forming on the outside (air entering face) of the filter elements. Moisture which freezes on the surface of the filters is obviously no longer available to cause icing problems at the bell mouth of the gas turbine.
Because the pulse air filter system will pulse clean continuously in cold weather for lengthy periods, it is essential that adequate compressed air be available at all times.
Self-Cleaning Filter Modifications for Cold Weather Application.
Several design features should be considered for inclusion in cold weather applications. These include:
- Solenoid box heaters
- Control box heaters or remote mounted control box in a heated area
- Trace heating of manifolds and air valves
- Trace heating of compressed air lines from the compressor to the
pulse filter
- Stainless steel air lines between solenoid boxes and air valves
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