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.

Gas generator efficiency calculation. Diesel generators are able to reach an efficiency of about 40 in the engine speed range of idle to about 1 800 rpm. 13 31 where the trends in power and thermal efficiency due to hot end damage in the gas generator turbine are illustrated. 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. Fuel consumption is presented in accordance with iso 3046 1 with a tolerance of 0 5 at maximum rating.

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. Download excel calculator for electric generator. Example of consumption per kwh consumption of a diesel generator at 75 of nominal power.

For every 100 units of energy input 40 units are delivered as output. Ignore the losses in the ducting gear box and generator. This assumes a 1x1 ccgt configuration one gas turbine and heat recovery steam generator supplying one steam turbine air cooled condensers and a bypass stack to isolate the steam generating portion of the plant from the gas turbine. 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.

Figure 2 shows efficiency curves for plants operating at summer ambient conditions of 25ºc 77ºf. 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. Electrical efficiency values assume a generator efficiency of 94 at 0 8pf.