CORRECTED TURBINE GAS HEAT RATE

[JUANPANAMA]

I work an electric power plant in Panama City. We have a LM 6000 GE Turbine that produce 48.2 MW. I have the code of Asme that explains how to calculate the heat rate and I have the guarantee values that GE did at first year of operations. These values were corrected using 82°F To, 85% HR, 14.7 psia Po. They used a particular graphics to do it but I have a problem becasue the National dispach Center of Panama wants tha I calcule the corrections using other values for example 83°F and 90%HR. I need informations about how calculate these graphics or any book or site on internet that has this information.

Best regard,

Juan Aguilar
I&C
Copesa Power Plant
Republic of Panama
Email.: jdaguilarc@hotmail.com
Phones: (507) 200-1045

 

[Techcitizen]

You need the correction curves (Efficiency Vs. Humidity & Efficiency Vs Ambient Temperature) for the engine. These are standard curves and given by the GT Supplier. As might be already known to you, 860000 divided by the %efficiency will give the Heat Rate in KCal/KWhr. Also standard curves are available to account for aging (Efficiency Vs. Operating Hrs).
Hope this helps.

 

[Techcitizen]

Please correct 860000 to 86000 in my previous mail, i.e. 86000 divided by the %efficiency will give you the heat rate.

 

[JUANPANAMA]

ok I have this graphics, I wrote to GE to obtain new graphics because they used other guaratee value.
thanks. I have PTC- of ASME that indicate this informations, but I dont understant stadistic method. Can you help me in this?

tanks,

juan

 

[TheTestEngineer]

To Juan Panama,

I just finished a spreadsheet that contains the GE curves for a 7EA. It includes the corrections on one sheet, and a figure of the curves on another. The figures include the design point and the measured point.

This is my first time visiting eng-tips.com. I don't see how to send an attachment to you.

If you send your email address to LPenna@MDAturbines.com, I will be glad to email it to you. Or if you email the curves, I will create the corrections for you, no charge.

Regards,
Lon Penna
The Test Engineer
Member ASME PTC-22 (gas turbines).