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Fuel Flow Unit
What is the output unit after calculation of gas fuel flow?

Respected Friends,

Good day. I have a equation in the PLC which calculate the flow of the Gas Turbine engine. What is the output unit if the following values applied:

`Flow = C_Prime Factor *SQR (ABS (FUEL_DP.VAL*PRESS_ABS*ORIFICE_TEMP_RATIO*GAS_FLOW_ORIFICE_Z_RATIO))`

Fuel_DP = inches of water col.
Press_ABS = PSIA
Orifice Temp Ratio = Orifice design Temp (Deg R)/ Gas Temp (Deg R)
Orifice Z Ratio = Compresibility Factor

What is the output unit after calculation SCF/H or PPH or PPS or SCF/S

Regards

The units are determined by your C_Prime Factor.

What size line and line pressure and nominal temp.

Respected sir,

>The units are determined by your C_Prime Factor.
>
>What size line and line pressure and nominal temp.

The line size is 2 inch dia pressure is 180 PSIG and nominal temperature is 60 Deg F.

Is there any simple method to calculate C_Prime?

Regards

Sure,

You need the line I.D., the plate I.D. or beta factor, and
the meter d/p (In W.C.) for your transmitter. The gas properties of course such as specific gravity relative to air, compressibility factor, and so on.

For your line size, pressure, and temperature, you are passing roughly 600-700 SCFM in a normal process, courtesy of the Crane flow manual No. 410.