|
|
Environment:
|
Urban / Light industrial with residential areas
|
|
Location:
|
Suburban/Urban (90% developed). Single and multifamily
housing. Paved roads. Moderate traffic. Moderate air pollution.
|
|
Land Use:
|
Residential. Stores. Warehouses. Trucking. Construction.
Manufacturing.
|
|
Weather:
|
Rain. Sun. Snow. Fog. Ice.
|
|
Temperature:
|
- 4° to 95° F (-20° to 35° C)
|
|
Types of Dust:
|
Mainly dry, granular. Some soot particles and fibers.
Particulate may contain corrosive elements. Some manufacturing
complexes will generate their own types of particulate. Paper mills,
for example, will generally emit sodium sulfates.
|
|
Dust Concentration:
|
0.05 - 0.50 mg/m3
0.02 - 0.20 gr/1000 ft3
|
|
Particle size (µm):
|
0.01 - 10
|
|
Potential damage to turbine:
|
Fouling. Corrosion
|
Recommended Gas Turbine Inlet Air Filtration Systems
OPTION 1:
Dust Concentrations > 0.1 mg/m3
- INLET WEATHER HOODS (inlet velocity < 3.5 m/s for rain. < 1.7m/s for
snow)
- INLET BIRD SCREEN
- SELF-CLEANING INERTIAL SEPARATOR. (bleed air exhaust fan may need
silencer)
- FINAL STAGE FILTER 70%-95% ASHRAE 52.1 Dust Spot Efficiency
depending upon make and model of gas turbine being protected
OPTION 2:
Dust Concentrations < 0.1 mg/m3
- INLET WEATHER HOOD. (Inlet velocity < 3.5 m/s for rain. < 1.7 m/s
for snow)
- INLET BIRD SCREEN
- PRE FILTER. (minimum 85% ASHRAE 52.1 arrestance minimum 2,000 grams
SAE- Fine dust holding capacity)
- FINAL STAGE FILTER. (70% - 95% ASHRAE 52.1 Dust Spot Efficiency
depending upon make and model of gas turbine being protected)
Notes applicable to both options:
- Anti-Icing, if climatic conditions warrant
- Inlet Air Cooling, evaporative cooling or chilled water coils, if
climatic conditions warrant
- Careful consideration of air intake orientation should be exercised
since dust concentrations can sometimes be minimized.
- Some turbine manufacturers require that unfiltered air by-pass doors
be provided on the air inlet system.
|
|
