This is a 7F class Machine, with Guarantee conditions based on 90 F ambient temp, 14.13 psia barometric pressure

After the tuning I realized that the control curve 84 IGV /2410 Tfire was built using the custom relative humidity as 60% instead of default (-2), the default -2 refers to default humidity profile collected from operational data of fleet .

During tuning, CPR was 14.57 and ambient temperature 100 deg F. Will I have to retune
this unit? Why?

Control Constants generated on both profiles are:<pre>
84/2410 (Default RH) 84/2410 (60% RH)

-24.633 ############ -30.727
12.331 ############ 12.915
1200 ############ 1200
15.259 ############ 15.254
-31.633 ############ -31.758
12.979 ############ 12.991
1200 ############ 1200
16.540 ############ 16.540
-46.486 ############ -46.523
14.117 ############ 14.117
1200.000 ############ 1200.000</pre>

 

Great question for GE Energy Engineering Combustion Engineering or -Thermal Performance!