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

  • Pravin Tukaram NitnawareEmail author
  • Jiwak G. Suryawanshi
Original Contribution
  • 68 Downloads

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.

Keywords

EGR NOx HCNG blends CNG Hydrogen 

Notations

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

References

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Copyright information

© The Institution of Engineers (India) 2018

Authors and Affiliations

  • Pravin Tukaram Nitnaware
    • 1
    Email author
  • Jiwak G. Suryawanshi
    • 2
  1. 1.D Y Patil College of EngineeringAkurdi, PuneIndia
  2. 2.Visvesvaraya National Institute of TechnologyNagpurIndia

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