Gas turbine load problem

hashimbukhari · July 23, 2010, 01:59

I am working in combined cycle power plant and recently i have faced a problem that is
we have 2 gas turbines and 1 steam turbine. Few days ago a dust strom and after that rain came and just after our one gas turbine load reduced approximatley 2 MW.

Reduced load turbine parameter are,
pressure drop just before and after filters= 70.3mmH20
compressor Inlet temperature= 28 C
Compressor discharge pressure= 13 barg
compressor discharge pressure= 408 C

If any body know the cause please comment. waiting for response.

RobertB · July 23, 2010, 09:14

What machine?

Have you calculated the compressor efficiency before and after the storm? Is the compressor dirty?

Did the pressure loss across the filters go up?

Do you have a compressor water wash? Offline or on/offline?

hashimbukhari · July 24, 2010, 04:48

GE mark VI speedtronic control machine
yes i have calculated compressor efficiency and i was just below to previous. no i is not dirty
yes the DP acorss filter is reduced
yes we have offline washing system.

July 23, 2010, 01:59	Gas turbine load problem	#1
hashimbukhari New Member Hashim Join Date: Jul 2010 Posts: 2 Rep Power: 0	I am working in combined cycle power plant and recently i have faced a problem that is we have 2 gas turbines and 1 steam turbine. Few days ago a dust strom and after that rain came and just after our one gas turbine load reduced approximatley 2 MW. Reduced load turbine parameter are, pressure drop just before and after filters= 70.3mmH20 compressor Inlet temperature= 28 C Compressor discharge pressure= 13 barg compressor discharge pressure= 408 C If any body know the cause please comment. waiting for response.

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July 23, 2010, 09:14		#2
RobertB Senior Member Robert Join Date: Jun 2010 Posts: 117 Rep Power: 17	What machine? Have you calculated the compressor efficiency before and after the storm? Is the compressor dirty? Did the pressure loss across the filters go up? Do you have a compressor water wash? Offline or on/offline?

July 24, 2010, 04:48		#3
hashimbukhari New Member Hashim Join Date: Jul 2010 Posts: 2 Rep Power: 0	GE mark VI speedtronic control machine yes i have calculated compressor efficiency and i was just below to previous. no i is not dirty yes the DP acorss filter is reduced yes we have offline washing system.