Gas Generator Efficiency Calculation

Example of consumption per kwh consumption of a diesel generator at 75 of nominal power.

Gas generator efficiency calculation.

In the paper a calculation methodology of isentropic efficiency of a compressor and turbine in a gas turbine installation on the basis of polytropic efficiency characteristics is presented. The decreases in compressor pressure ratio gas generator turbine efficiency and the cycle temperature ratio t 3 t 1 result in a decrease in the thermal efficiency. For every 100 units of energy input 40 units are delivered as output. 13 31 where the trends in power and thermal efficiency due to hot end damage in the gas generator turbine are illustrated.

Fuel flow calculation based on fuel with 900btu scf lhv and fuel consumption with a tolerance of 0 5. Figure 2 shows efficiency curves for plants operating at summer ambient conditions of 25ºc 77ºf. Fuel consumption is presented in accordance with iso 3046 1 with a tolerance of 0 5 at maximum rating. This excel file will help you to calculate power and electricity production according to load fuel consumption and cost of kwh from diesel or gas generator.

Ignore the losses in the ducting gear box and generator. Generator energy conversion efficiency η gen 0 985 per unit fuel lhv for hydrocarbon natural gas 37 50 mj kg fuel air ratio by mass 0 01 per unit f 2 basic requirements assume constant specific heat c p c pc andγ γ c. This chart approximates the fuel consumption of a natural gas generator based on the size of the generator and the load at which the generator is operating at. Please note that this table is intended to be used as an estimate of how much fuel a generator uses during operation and is not an exact representation due to various factors that can increase or decrease the amount of fuel consumed.

Electrical efficiency values assume a generator efficiency of 94 at 0 8pf. Diesel generators are able to reach an efficiency of about 40 in the engine speed range of idle to about 1 800 rpm. Thus the decrease in powers and thermal efficiencies are observed as shown in fig.