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# Fuel (gas and diesel ) consumption estimate

## Fuel (gas and diesel ) consumption estimate

(OP)
I am currently working on a power plant system design and I need to determine the fuel consumption for the gas Turbine (Gas Or Gas Oil). The Turbine is rated for 50MW How do i go about the estimate. Please I would also like you to state a reference material on this calculation.

### RE: Fuel (gas and diesel ) consumption estimate

Why do you need reference materials?  Its simple energy in equals energy out.  Now if you want the exact answer you must tell us the EXACT thermodynamic efficency of your 50MW turbine on each fuel.

### RE: Fuel (gas and diesel ) consumption estimate

(OP)
Themodynamic efficiency of 35 %.

### RE: Fuel (gas and diesel ) consumption estimate

(OP)
I am currently working on a power plant system design and I need to determine the fuel consumption for the gas Turbine (Gas Or Gas Oil). The Turbine is rated for 50MW How do i go about the estimate. The thermodynamic efficiency is 35%.

### RE: Fuel (gas and diesel ) consumption estimate

hydrocarbons have typically 22000 btu/pound mass of energy  gasoil is closer to 23000 and gas about 21000.  So convert mw to btu's, find how many pounds, then divide by efficency.

### RE: Fuel (gas and diesel ) consumption estimate

I don't have the numbers at hand but I'm sure you can get the fuel consumption at Solar's, GE's or any other gas turbine manufacturer's website.

Seems I recall seeing these in one of the trade journals when they were talking about gas turbines also so it's readily available.

The heat rate for a gas turbine is BTU/kW hr.  They do vary depending on size so you want to do some checking around to be sure you have a reasonable value.

Most heavier hydrocarbons have a lower heating value of about 18,000 to 19,000 BTU/lb so that should give you an idea of the unit's fuel consumption.

### RE: Fuel (gas and diesel ) consumption estimate

Simply take the turbine power P in MW=MJ/sec, and divide with efficiency (P/ef.= Preq) and you will get required energy of gas.
Take gas LHV (kJ/Sm3) and find how many Sm3/sec you need to achieve required turbine energy.
Take care about units Mega vs. kilo.

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