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Effects of Lean Burn and Stoichio. Burn Combustion on Multi-cylinder SI Engine Using Hydrogen and CNG Blends

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Abstract

This paper shows the effect of 0, 5, 10 and 15 % of hydrogen by energy in compressed natural gas during lean burn and stoichio. burn combustion. All trials are performed at wide open throttle position on 3-cylinder, water-cooled 796 cc S.I engine using sequential port fuel injection system at equivalence ratio of 0.7 and 1.0. Carbon-based emission decreased with increase in hydrogen addition. MBT spark timing increased with increase in speed and decreased with increase in equivalence ratio. At 12°CA spark advance and 2500 rpm, 5 % hydrogen addition shows rise in brake thermal efficiency with optimum NOx. NOx emission increased with increase in hydrogen addition and decreased with MBT spark timing. Heat release rate and maximum rate of pressure rise increased remarkably with 5 % hydrogen addition due to increase in burning velocity. Maximum brake thermal efficiency of 25 % is observed for 5 % hydrogen addition with increase in power output at stoichiometric condition.

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Abbreviations

BSEC:

Brake specific energy consumption

BTE:

Brake thermal efficiency

CHRR:

Cumulative heat release rate

CO:

Carbon monoxide

COVIMEP :

Coefficient of variation of indicated mean effective pressure

COVPmax :

Coefficient of variation of maximum cylinder pressure

CNG:

Compressed natural gas

EGR:

Exhaust gas recirculation

HCNG:

Hydrogen CNG blends

H2 :

Hydrogen

HC:

Hydrocarbon

HRR:

Heat release rate

IMEP:

Indicated mean effective pressure

MBT:

Maximum brake torque

MFB:

Mass fraction burn

NOx:

Oxides of nitrogen

ST:

Spark timing

WOT:

Wide open throttle

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Acknowledgments

I am thankful to Savitribai Phule Pune University for funding this project and also thankful to Director Col. S K Joshi (Retd.) for providing facilities to install the experimental setup in internal combustion laboratory of D Y Patil College of Engineering, Akurdi, Pune.

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Authors and Affiliations

  1. Department of Mechanical Engineering, D Y Patil College of Engineering Akurdi, Pune, Maharashtra, 411044, India

    P. T. Nitnaware

  2. Department of Mechanical Engineering, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, 440011, India

    J. G. Suryawanshi

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  1. P. T. Nitnaware
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  2. J. G. Suryawanshi
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Correspondence to P. T. Nitnaware.

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Nitnaware, P.T., Suryawanshi, J.G. Effects of Lean Burn and Stoichio. Burn Combustion on Multi-cylinder SI Engine Using Hydrogen and CNG Blends. Iran J Sci Technol Trans Mech Eng 40, 347–357 (2016). https://doi.org/10.1007/s40997-016-0038-0

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  • DOI: https://doi.org/10.1007/s40997-016-0038-0

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