Title: Assessment of thermodynamic performance and exergetic sustainability of turboprop engine using mixture of kerosene and methanol

Authors: Selcuk Ekici; Onder Altuntas; Emin Açıkkalp; M. Ziya Sogut; T. Hikmet Karakoc

Addresses: Faculty of Aeronautics and Astronautics, Anadolu University, Eskisehir TR-26470, Turkey ' Faculty of Aeronautics and Astronautics, Anadolu University, Eskisehir TR-26470, Turkey ' Mechanical and Manufacturing Engineering Department, Bilecik S.E. University, Bilecik TR-11210, Turkey ' Faculty of Aeronautics and Astronautics, Anadolu University, Eskisehir TR-26470, Turkey ' Faculty of Aeronautics and Astronautics, Anadolu University, Eskisehir TR-26470, Turkey

Abstract: 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.

Keywords: alternative fuels; gas turbine engines; sustainability indicators; thermodynamic performance; turboprop engines; kerosene; methanol; mathematical modelling; air-fuel ratio; fuel flow; fuel consumption; waste exergy ratio; exergy destruction; environmental effect.

DOI: 10.1504/IJEX.2016.075666

International Journal of Exergy, 2016 Vol.19 No.3, pp.295 - 314

Received: 04 Sep 2014
Accepted: 19 Feb 2015
Published online: 31 Mar 2016 *

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