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Effects of Exhaust Gas Recirculation on Performance and Emission Characteristic of SI Engine using Hydrogen and CNG Blends

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Abstract

This paper shows exhaust gas recirculation (EGR) effects on multi-cylinder bi-fuel SI engine using blends of 0, 5, 10 and 15% hydrogen by energy with CNG. All trials are performed at a speed of 3000, 3500 and 4000 rpm with EGR rate of 0, 5, 10 and 15%, with equal spark timing and injection pressure of 2.6 bar. At specific hydrogen percentage with increase in EGR rate NOx emission reduces drastically and increases with increase in hydrogen addition. Hydrocarbon (HC) and carbon monoxide (CO) emission decreases with increase in speed and hydrogen addition. There is considerable improvement in brake thermal efficiency (BTE) and brake specific energy consumption (BSEC) at 15% EGR rate. At 3000 rpm, 5% EGR rate with 5% hydrogen had shown maximum cylinder pressure. Brake specific fuel consumption (b.s.f.c) increased with increase in EGR rate and decreased with increase in hydrogen addition for all speeds.

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Abbreviations

BSNOx :

Brake specific nitrogen oxides

BMEP:

Brake mean effective pressure

BSEC:

Brake specific energy consumption

BTE:

Brake thermal efficiency

CO:

Carbon monoxide

CNG:

Compressed natural gas

EGR:

Exhaust gas recirculation

HCNG:

Hydrogen CNG blends

H2 :

Hydrogen

HC:

Hydrocarbon

IMEP:

Indicated mean effective pressure

N2:

Nitrogen

NOx :

Nitrogen oxides

ST:

Spark timing

WOT:

Wide open throttle

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Authors and Affiliations

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

    Pravin Tukaram Nitnaware

  2. Visvesvaraya National Institute of Technology, Nagpur, 440010, India

    Jiwak G. Suryawanshi

Authors
  1. Pravin Tukaram Nitnaware
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  2. Jiwak G. Suryawanshi
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Correspondence to Pravin Tukaram Nitnaware.

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Nitnaware, P.T., Suryawanshi, J.G. Effects of Exhaust Gas Recirculation on Performance and Emission Characteristic of SI Engine using Hydrogen and CNG Blends. J. Inst. Eng. India Ser. C 100, 289–294 (2019). https://doi.org/10.1007/s40032-018-0440-z

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  • DOI: https://doi.org/10.1007/s40032-018-0440-z

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