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Articles

Evaluating the effect of intake parameters on the performance of a biogas–diesel dual-fuel engine using the Taguchi method

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Pages 441-449 | Received 12 Apr 2017, Accepted 04 Aug 2017, Published online: 11 Sep 2017
 

ABSTRACT

A Compression Ignition (CI) engine was operated in dual-fuel mode with simulated biogas as primary fuel and diesel as pilot fuel. The effects of four intake parameters, viz. biogas flow rate, methane fraction of biogas, applied torque and charge temperature, on engine performance were investigated under constant speed operation. The number of experimental trials was reduced to 16 using Taguchi's approach. Higher-the-better (HTB) or lower-the-better (LTB) criteria for signal-to-noise ratio (SNR) were used to optimise five performance indices. Lower biogas flow rates and methane fractions provide better performance in general. However, increasing the biogas flow rate and methane fraction enhances diesel substitution. Analysis of variance (ANOVA) showed that engine torque was the main contributing factor for most of the performance indices. Charge temperature and biogas flow rate made significant contributions towards volumetric efficiency. Volumetric efficiency and overall equivalence ratio are also affected by the methane fraction of biogas.

Acknowledgements

The authors would like to thank VIT Chennai for supporting this work via the university research seed fund.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the VIT University.

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