My plant is MS5001 GE machine which have temperature setting value @ 495 Deg.C and consume 5.9 MMSCF/D of fuel gas for 20 MW of Base load.

At present, our machine has been upgrade the capital part to R or P/NT type and then we expect that after upgrade, our machine should be consumed 7.2 MMSCF/D of fuel gas.

Please, someone recommend us, How to determine the new exhaust temperature setting of MS5001 GE Gas turbine, after changed of capital part to R or P/NT type.

 

good question
please what are exhaust spreads mean?

 

The originator's question should be answered by the company providing the hardware and software to implement the new combustion and turbine hardware and to control the fuel flow-rate to prevent damage to the new hardware while maximizing power output. GE uses a very powerful and time-consuming computer program (as in the program can run for hours at a time) to make these calculations and determine the control parameters for each turbine and site and expected operating conditions and auxiliaries and exhaust and inlet conditions. It's not a number or a formula that can be written in one statement and calculated once to determine a number. Rather, it's a formula with lots of variables which is run repeatedly for the expected operating conditions (ambient pressure range, ambient temperature range, ambient humidity range, etc.) and the results are then analyzed to come up with an optimal set of parameters by which to control the fuel flow-rate as a function of compressor discharge pressure-biased exhaust temperature.

As for the second question (which is a good question all by itself), it really belongs in a new thread as it's unrelated to this thread. But, since it was asked here, an exhaust temperature spread refers to the differential in temperatures from the multiple T/Cs in the exhaust of the gas turbine. A high differential, or a high spread, is usually indicative of combustion hardware problems, usually a crack or a hole in a liner or transition piece, or a leaking side seal, or a blockage in a fuel nozzle. These all result in a "cold spot" associated with the combustor where the problem is. If the highest and lowest and highest and second lowest and highest and third lowest exhaust T/C values are very close to each other, then that usually indicates the worst possible problem and the turbine control system will usually trip the turbine.

 

which causes of loss of flame?