TY - JOUR
TI - Numerical study on the combustion process of a biogas spark-ignition engine
AU - Carrera E José L
AU - Riesco A José M
AU - Martínez M Simón
AU - Sánchez C Fausto A
AU - Gallegos M Armando
JN - Thermal Science
PY - 2013
VL - 17
IS - 1
SP - 241
EP - 254
PT - Article
AB - The fuel called biogas is obtained through anaerobic digestion of different  types of organic waste, providing a way to tap the energy stored in organic  matter. The use of this fuel is also attractive from the standpoint of global  warming because its application does not register a net emission of carbon  dioxide into the atmosphere. One possible use for this fuel is to feed the  spark-ignition internal combustion engines. In the present, there is little  information available about the process of combustion in internal combustion  engines fueled by biogas. The combustion process of an internal combustion  engine ignition powered by biogas is characterized in terms of the duration  of combustion, i.e., depending on the time elapsed while the reactants  (methane and oxygen) are transformed into products (mainly carbon dioxide and  water). This study numerically evaluates the way in which the geometrical  parameters such as the compression ratio and operating parameters like engine  speed, the excess air, the time of spark timing and carbon dioxide content of  biogas affect the evolution of the combustion process. To carry out this  study, a five factors and two levels experiment was designed and conducted,  based on which, the most influential parameters were identified. Equations  expressing the combustion characteristic parameters, as a function of the  geometric and operation parameters of a spark ignited engines, are delivered  as a result.