Aircraft fuel system energy and exergy analysis under hot day conditions

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.