Effect of exhaust gas recirculation and intake pre-heating on performance and emission characteristics of dual fuel engines at part loads

A. Paykani, R. Khoshbakhti Saray, M. T. Shervani-Tabar, A. Mohammadi-Kousha

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Achieving simultaneous reduction of NOx, CO and unburned hydrocarbon (UHC) emissions without compromising engine performance at part loads is the current focus of dual fuel engine research. The present work focuses on an experimental investigation conducted on a dual fuel (diesel-natural gas) engine to examine the simultaneous effect of inlet air pre-heating and exhaust gas recirculation (EGR) ratio on performance and emission characteristics at part loads. The use of EGR at high levels seems to be unable to improve the engine performance at part loads. However, it is shown that EGR combined with pre-heating of inlet air can slightly increase thermal efficiency, resulting in reduced levels of both unburned hydrocarbon and NOx emissions. CO and UHC emissions are reduced by 24% and 31%, respectively. The NOx emissions decrease by 21% because of the lower combustion temperature due to the much inert gas brought by EGR and decreased oxygen concentration in the cylinder.

Original languageEnglish
Pages (from-to)1346-1352
Number of pages7
JournalJournal of Central South University
Volume19
Issue number5
DOIs
Publication statusPublished - 1 May 2012
Externally publishedYes

Keywords

  • Dual fuel engine
  • Emission
  • Exhaust gas recirculation (EGR)
  • Performance
  • Venturi EGR system

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