Exergy and environmental analyses of natural gas and biogas fuels in an internal combustion engine at part load
by Yasar Bulbul; Altay Arbak; Yasin Karagöz; Selman Karagöz; Tarkan Sandalci; Saban Pusat
International Journal of Exergy (IJEX), Vol. 42, No. 4, 2023

Abstract: This paper presents an experimental investigation on a single-cylinder diesel engine fuelled with natural gas and biogas. Biogas was obtained by mixing methane and carbon dioxide (CO₂). The analyses were carried out by using the results of experiments on different fuel mixtures at constant engine power. As a result of working at partial load, the energy and exergy efficiencies of the engine were relatively low. When the results were compared by CO₂ content of the fuel, it was observed that when the CO₂ ratio increased, the exergy efficiency decreased. In addition, an economic analysis was performed based on the equivalent CO₂ emission and the average carbon tax in the European Union. Accordingly, natural gas had the highest GWP value and tax amount. As the CO₂ content in the fuel increased, the global warming potential (GWP) and the carbon tax to be paid decreased.

Online publication date: Mon, 08-Jan-2024

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