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We are operating two GE frame V MS5001P gas turbines equipped with dual fuel nozzles. The turbines are currently being operated on Gaseous fuel.
On one of our turbines exhaust spread has increased to 37 degrees Celsius.
What problems can occur if turbine is kept operating with high exhaust spread?
Should we shutdown the turbine if exhaust spread exceeds allowable value?
This turbine has undergone combustion inspection in March. During that activity all fuel nozzles, combustion liners and crossfire tubes were replaced. Also on this turbine atomizing air compressor has been removed and fuel nozzles purge air and atomizing air inlets are seal welded.
Can this problem occur because of cracked fuel nozzle cap due to hot gas back flow into atomizing air passage?
On one of our turbines exhaust spread has increased to 37 degrees Celsius.
What problems can occur if turbine is kept operating with high exhaust spread?
Should we shutdown the turbine if exhaust spread exceeds allowable value?
This turbine has undergone combustion inspection in March. During that activity all fuel nozzles, combustion liners and crossfire tubes were replaced. Also on this turbine atomizing air compressor has been removed and fuel nozzles purge air and atomizing air inlets are seal welded.
Can this problem occur because of cracked fuel nozzle cap due to hot gas back flow into atomizing air passage?