NUMERICAL STUDY ON THE COMBUSTION PROCESS OF A BIOGAS SPARK-IGNITION ENGINE

Abstract

The fuel called biogas is obtained through anaerobic digestion of different types f organic waste, providing a way to tap the energy stored in organic matter. The se of this fuel is also attractive from the standpoint of global warming because ts application does not register a net emission of carbon dioxide into the tmosphere. One possible use for this fuel is to feed the spark-ignition internal ombustion engines. In the present, there is little information available about the rocess of combustion in internal combustion engines fueled by biogas. The ombustion process of an internal combustion engine ignition powered by biogas s characterized in terms of the duration of combustion, i.e., depending on the ime elapsed while the reactants (methane and oxygen) are transformed into roducts (mainly carbon dioxide and water). This study numerically evaluates the ay in which the geometrical parameters such as the compression ratio and perating parameters like engine speed, the excess air, the time of spark timing nd carbon dioxide content of biogas affect the evolution of the combustion rocess. To carry out this study, a five factors and two levels experiment was esigned and conducted, based on which, the most influential parameters were dentified. Equations expressing the combustion characteristic parameters, as a unction of the geometric and operation parameters of a spark ignited engines, re delivered as a result.

Keywords

Dates

  • Submission Date2011-11-15
  • Revision Date2012-06-13
  • Acceptance Date2012-07-21

DOI Reference

10.2298/TSCI111115152C

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