Exergy modeling for evaluating sustainability level of a high by-pass turbofan engine used on commercial aircrafts

This study presents an exergy modeling to evaluate the sustainability level of a high by-pass turbofan engine used on commercial aircrafts. The nineteen sustainability indicators for the component level and the thirteen sustainability metrics for the system level are recommended based on the exergy analysis. The PW4056 model turbofan engine is examined by the suggested sustainability metrics for the Maximum Take-Off Power (MTOP) operation mode and the Take-Off Running Power (TORP) at the seal level. As a result of the sustainability analysis, The exergy efficiency, improved exergy efficiency, waste exergy ratio, fuel exergy waste ratio, improvable exergy potential ratio, waste exergy improvement potential ratio, fuel exergy improvement potential ratio, productivity lack ratio, environmental effect factor, ecological effect factor, exergetic sustainability index, sustainable efficiency factor and waste exergy cost rate are estimated to be 0.268, 0.577, 0.732, 0.781 0.536, 0.732, 0.572, 2.730, 2.730, 3.495, 0.366, 1.366, 0.018 kW/$ for the MTOP operation modes while they are obtained to 0.205, 0.557, 0.795, 0.848, 0.631, 0.795, 0.674, 3.869, 4563, 0.258, 1.258, 0.019 kW/$ for the TORP operation modes. Comparing the sustainability indicator values of MTOP mode to the sustainability indicator values of the TORP mode, the engine operates the better sustainability level at the MTOP operation mode.