Combined Cycle Steam Generator Gas Side Fouling Evaluation. Phase 1.
SOLAR TURBINES INTERNATIONAL SAN DIEGO CA
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Liquid-fueled gas turbines can produce serious steam generator fouling in gas turbine combined cycle applications and other waste heat recovery systems as a result of combustion system generated soot particles. In addition, standard soot blowing practices are not always compatible with the advanced, compact matrix designs sometimes required for minimum package size applications. This report describes an experimental program conducted on both test rigs and engine hardware designed to evalaute the effects on gas side soot fouling rates of various operational parameters such as soot loading, temperature and velocity. Particular attention was given to the effectiveness of the self-cleaning concept where elevated steam generator metal temperatures are utilized to remove soot deposits. The test results showed that a combustion rig can simulate the soot fouling rates and the type of soot encountered in a combined cycle gas turbine steam generator if duplication of the controlling parameters is achieved. In addition, self-cleaning by dry operation appears to be a viable alternative to air or steam blowing although further work is recommended in this area to see if the threshold temperature can be depressed or the rate of cleaning increased. Author
- Marine Engineering