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WOS: 000428177300004, In this paper, energy and exergy analysis of the fuel system is performed to investigate the variation of flow and heat energies of fuel. Thermal balance, formed by many different components of aircraft systems by means of heat management, has been significantly affected by aircraft performance. For that reason, thermal management of the fuel system in the aircraft has a significant indication concerning energy and exergy flow. The results indicate that the rate of energy transfer, which is occurred in the fuel system components throughout flight is respectively 42% for low-pressure heat exchanger, 23% for high-pressure heat exchanger and 22% for the low-pressure fuel pump and finally 13% for the high-pressure fuel pump. In addition to that; during the flight the exergy destruction rate in the fuel system, in proportion to flight phases, is 51% during the climbing phase, 21% during the acceleration phase, 14% during the idle position and 7% during both cruise and descent phase.

WOS: 000377354500001, In this study, first and second laws of thermodynamics were performed in the turboprop and is analysed and discussed with the mathematical model of sustainability performance of a turboprop engine using a mixture of alternative fuel (Methanol CH3OH) and conventional fuel (Kerosene C12H26). The results showed when the excess air is kept constant, with the increases of the alternative fuel, mixture is enriched with oxygen as a source of methanol and the actual air-fuel ratio decreased was determined. When the rate of alternative fuel in mixture was increased, it was observed that the fuel flow started to increase, because Lower Heating Value of methanol is lower than kerosene. Therefore, increasing of fuel consumption was found to obtain the same power in propeller as negative effect. ESIs - waste exergy ratio, exergy destruction factor and environmental effect factor- is increased with the increasing ratio of methanol in the mixture.