- مبلغ: ۸۶,۰۰۰ تومان
- مبلغ: ۹۱,۰۰۰ تومان
Union Gas has operated four AVON powered compressor units since the early 1970’s. These units have experienced a series of GG failures and near misses over their service history, culminating in two major failures on a single GG in 2003. Both the 2003 GG failures had occurred in less than 500 operating hours since overhaul. Virtually all failures and near misses since the 1970’s were attributed to High Cycle Fatigue (HCF) in the HP Turbine, induced by poor fuel quality. To address this problem, Union Gas undertook a program, in 2004, to upgrade the fuel conditioning system, on-skid fuel gas piping, Fuel Control Valve and PLC based fuel control systems. In addition to these upgrades, Union Gas has also installed Rolls Royce Mod 5000 (Swirler Burners) on two 1535-161G AVON engines and has actively pursued the use of high temperature microphones, installed in boroscope ports, as a means of detecting the combustion disturbances suspected of causing HCF. This paper details Union’s fuel system upgrade program, Union’s operating experience with the swirler burner mod, and data/conclusions regarding the use of high temperature microphones as a method of detecting combustion disturbances.