Page 486 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair
P. 486
Gas Turbines 463
Figure 9-10. Typical primary combustor basket (courtesy Canadian Westinghouse).
Turbine and Exhaust
Whereas the combustion system of a gas turbine requires most of our
routine maintenance, the downstream hot parts are where maintenance
becomes most expensive. Annual expenditures for routine maintenance
on a gas turbine may average ten to twenty percent of the initial purchase
price.
In order to achieve the highest possible operating efficiency, gas tur-
bine combustion temperatures are kept high. Thus, turbine inlet tempera-
