Gas Turbine Handbook : Principles and Practices

Detectable Problems 197
Figure 12-8. Dual spool gas turbine estimated parameter changes
with low compressor efficiency changes.
discharge pressure (P 3
), fuel flow, exhaust gas temperature (T 7
), and
both high (T 4
) & low (T 3
) compressor discharge temperatures (Figure
12-9).
The equipment manufacturer normally specifies cleaning agents.
Typically, carbo-blast and water-wash are specified, with water-wash
being the first method recommended. Care should be taken in cleaning
compressors that are salt-laden, since the cleaning process will