Title: Exergetic, economic, and environmental impact assessments of a natural gas-diesel fuel blended internal combustion engine

Authors: Tugba Tetik; Yasin Karagoz

Addresses: Department of Mechanical Engineering, Istanbul Medeniyet University, Istanbul, Turkey ' Department of Mechanical Engineering, Istanbul Medeniyet University, Istanbul, Turkey

Abstract: This study investigates the potential of dual-fuel engines using natural gas and diesel to improve performance and reduce emissions. It examines the effects of natural gas ratios and injection duration under constant load conditions. Results showed a significant reduction in carbon monoxide (CO) and smoke emissions by up to 86% and 60%, respectively. An economic analysis evaluated the feasibility of this fuel blend, calculating the internal rate of return (IRR), net present value (NPV), and payback period (PB). Additionally, an exergy analysis assessed energy conversion efficiency, while global warming potential (GWP) calculations indicated a blend of 22% natural gas had the lowest GWP.

Keywords: dual fuel; exergy; natural gas; emissions; NOx.

DOI: 10.1504/IJEX.2025.146410

International Journal of Exergy, 2025 Vol.47 No.1, pp.1 - 11

Received: 05 Sep 2024
Accepted: 16 Dec 2024
Published online: 28 May 2025 *

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