Gas Turbine Compressor Fouling & Derate Calculator
Quantify axial compressor aerodynamic fouling losses, inlet mass flow reduction, heat rate degradation, and financial megawatt loss per ISO 3977.
Turbine Baseline Ratings
Degradation & Financial Losses
Recommended Tools & Equipment
Tested hardware and components for high reliability
Frequently Asked Questions
What causes compressor fouling in industrial gas turbines?
Airborne contaminants passing inlet filtration—such as pollen, insects, unburned hydrocarbons from industrial neighbors, and sea salt aerosols—deposit on the first 3 to 5 axial compressor stages, disrupting blade aerodynamic profiles.
What is the difference between online and offline compressor washing?
Online washing sprays demineralized water into the compressor while running at full speed to retard fouling rates; offline (crank) washing soaks blades with detergent solutions during slow starter-motor rotation, fully restoring clean aerodynamic efficiency.
Why does compressor degradation degrade heat rate?
Compressor fouling reduces airflow mass flow and discharge pressure, forcing the combustor to burn proportionally more fuel per megawatt of turbine shaft expansion power.