This paper presents a detailed exergy analysis of homogeneous charge compression ignition (HCCI) engines, including crank-angle resolved breakdown mixture and destruction. Exergy is applied to multizone HCCI simulation chemical kinetics. The validated against engine experiments for ethanol-fueled operation. quantifies the relative importance different loss mechanisms within engines over range operating conditions. Specifically, four are studied their impact on losses, (1) irreversible...

One of the key factors current energy transition is use hydrogen (H2) as fuel in transformation technologies. This has advantage being produced from most primary forms and potential to reduce carbon dioxide (CO2) emissions. In recent years, or hydrogen-rich mixtures internal combustion engines (ICEs) have gained popularity, with numerous reports documenting their spark ignition (SI) compression (CI) engines. Homogeneous charge (HCCI) for substantial reductions nitrogen oxides (NOx)...

This paper evaluates strategies for reducing the intake temperature requirement igniting biogas in homogeneous charge compression ignition (HCCI) engines. The HCCI combustion is a promising technology stationary power generation using renewable fuels Combustion of engines allows high thermal efficiency similar to diesel engines, with low net CO2 and NOx emissions. However, order ensure occurrence autoignition purely fueled inlet needed. presents experimental numerical results. First,...

This study investigates the effects of biogas composition on combustion stability for a purely fueled homogeneous charge compression ignition (HCCI) engine. Biogas is one most promising renewable fuels combined heat and power systems driven by internal engines. However, high content CO2 in leads to low thermal efficiencies spark ignited dual fuel The divided into two parts: First experimental results biogas-fueled HCCI engine are used illustrate intake conditions stability, second simulation...

Energy transition to renewable sources and more efficient technologies is needed for sustainable development. Although this expected take a longer time in developing countries, strategies that have been widely explored by the international academic community, such as advanced combustion modes microgeneration, could be implemented easily. However, implementation of these well-known countries requires in-depth research because specific technical, environmental, social, economic conditions. The...

This study investigates the effects of biogas composition on combustion stability for a purely fueled HCCI engine. Biogas is one most promising renewable fuels Combined Heat and Power systems driven by internal engines. However, high content CO2 in leads to low thermal efficiencies spark ignited dual fuel compression The divided into two parts: first experimental results biogas-fueled engine are used validate numerical model, second model investigate how impacts stability. In part study,...

The polytropic coefficient is an important variable for determining errors in pressure and volume measurements apparent heat release calculation engine combustion analysis. For commercial gasoline-fueled spark-ignition engines diesel-fueled compression-ignition engines, a wide understanding about the thermodynamic models values of exists; however, other technologies, which gaseous fuels are used, treatment strategies transfer should be adjusted to allow better coefficient. This paper...

The aim of this paper is to investigate the effects replacing natural gas with synthetic gases on combustion stability and pollutants a surface-stabilized burner. We evaluated three high hydrogen contents ranging from 60% H2 75% H2. experimental study was carried out under different input power conditions (300 500 kW/m2) equivalence ratios. results obtained in work indicate that burner significantly affected by addition gases, which case held constant equimolar mixtures gas. This result...

The knocking and heat release based on cylinder pressure trace is a widespread practice in combustion diagnostic for conventional SI engines. accuracy depends quality of measured in-cylinder pressure, thermodynamic models parameters feeding such models. In non-conventional engine, common to assess engine operation, do not satisfy properly expected standard, thus application new methods required. This study presents the determination intensity by cycle-to-cycle variability operation analysis,...

Las emisiones de los motores encendido por compresión (MEC) están siendo fuertemente reguladas. Abandonar diésel no es una solución a las regulaciones establecidas, debido su alto desempeño respecto similares tecnologías. El uso combustibles más limpios y alternativos en actuales propuesta bastante atractiva, puesto que aprovecharía alta eficiencia características verdes convencionales. hidrógeno el combustible prometedor limpio puede ser producido partir energías alternativas como la solar...

Abstract Surface-stabilized combustion burners is a promising technique that has been studied for more than decade. However, in the design stage of these hard to determine if under certain operating conditions burner would operate adequately. In this paper, we performed numerical approach predict flame stability surface-stabilized burner. Here considered includes simultaneous solution mass and energy balance both, gas solid phase, as well proper estimation thermo-chemical thermo-physical...

The control of combustion development on spark ignition engines is one the most important international topics under research today.Engines with high compression ratios have higher thermal efficiency than their similars low but bigger restrictions cycle-to-cycle variations and knocking.The monitoring process a tool that allows for operating these safer conditions improving availability through time.This paper shows implementation system natural gas fuelled engine ratio using ionization...

This paper presents a detailed exergy analysis of homogeneous charge compression ignition (HCCI) engines, including crank-angle resolved breakdown mixture and destruction. Exergy is applied to multi-zone HCCI simulation chemical kinetics. The validated against engine experiments for ethanol-fueled operation. quantifies the relative importance different loss mechanisms within engines over range operating conditions. Specifically, four are studied their impact on losses, 1) irreversible...