Abstract:

In this study, energy, exergy, thermoecological, sustainability, thermoeconomic and exergoeconomic analyzes for piston-prop engines used in helicopters are explained and these analyses are applied on a piston-prop engine with 190 SHP power. Firstly, the piston-prop engine is considered as a thermodynamic system and accordingly the control volume, inlet and outlet flows, balance equations and dead state conditions of the system are determined. According to the findings, the energy efficiency of the system is found as 15.51%, while the exergy efficiency is calculated as 11%. The system’s entropy production, sustainability index, thermoecological performance coefficient, thermoeconomic parameter value, exergoeconomic parameter value due to loss exergy, exergoeconomic parameter value due to destruction exergy and total exergoeconomic parameter value are found as 2,940 W/K, 1.124, 0.161, 2.20 W/TL, 1.29 W/TL, 2.50 W/TL ve 3.79 W/TL, respectively. As a result of the analyses, it is noticed that the energy generated by the fuel entering the system is largely lost and depleted. In view of the obtained results, in addition to increasing the efficiency and performance of the engine, in order to reduce the losses and irreversibility in the system, it can be recommended to improve the cooling technologies of this type of engines.

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