Title: Exergy analysis of a biogas-diesel fuelled dual fuel engine

Authors: M. Feroskhan; M. Sreekanth; Saleel Ismail

Addresses: School of Mechanical Engineering, Vellore Institute of Technology Chennai, Vandalur-Kelambakkam Road, Chennai-600127, India ' School of Mechanical Engineering, Vellore Institute of Technology Chennai, Vandalur-Kelambakkam Road, Chennai-600127, India; Electric Vehicles Incubation, Testing and Research Centre, Vellore Institute of Technology Chennai, Vandalur-Kelambakkam Road, Chennai-600127, India ' Department of Mechanical Engineering, NIT Calicut, Kozhikode, Kerala-673601, India

Abstract: This work presents the exergy analysis of a biogas-diesel dual fuel engine for various operating loads and flow rates using simulated biogas. The engine is operated with pure methane and raw biogas with variable CH4:CO2 ratios to assess the effects of carbon dioxide extraction, termed as methane enrichment. Addition of biogas reduces exergy destruction and improved exergy efficiency vis-à-vis diesel operation at moderate to high loads. Exergy destruction and efficiency were found to range from 45%-80% and 10%-40% respectively. Methane enrichment and increase in load improved exergy efficiency.

Keywords: biogas; dual fuel; exergy; exergy efficiency; exergy destruction.

DOI: 10.1504/IJEX.2021.118720

International Journal of Exergy, 2021 Vol.36 No.2/3/4, pp.264 - 279

Received: 25 Aug 2020
Accepted: 15 Mar 2021

Published online: 29 Oct 2021 *

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