Comparison of energy, exergy and environmental economic analysis of turbofan engine in different fuel types

In this study, mathematical modeling of the GEnx-ib76 turbofan engine at different altitudes and fuel types was made in the EES (Engineering Equation Solver) program, and energy, exergy sustainability, exergoenvironment and exergoeconomic analyses were carried out. This study compares the thermodynamic performance of a turbofan engine fed with kerosene, hydrogen, and ammonia under the same conditions. While the maximum thermal efficiency of the turbofan engine fed with kerosene fuel is 51.68% at take-off altitude, this value is calculated as 50.76% when hydrogen fuel is used and 53.78% when ammonia is used. In addition, thrust efficiency and specific fuel consumption at take-off altitude are respectively, 38.71% and 38.38 kg/kN.h for kerosene, 38.02% and 14.11kg/kN.h for hydrogen, % 40,29 and 85,602 kg/kN.h for ammonia. These values decreased as the altitude increased. The lowest exergy efficiency of the turbofan engine was obtained in the combustion chamber (CC) component. These values are calculated as 77.55% for kerosene, 76.94% for hydrogen and 74.4% for ammonia. Accordingly, the component with the highest improvement potential of the turbofan engine was obtained in the CC component as 15677.96 kW for kerosene, 16368.36 kW for hydrogen and 21207.38 kW for ammonia.