Availability analysis of n-heptane and natural gas blends combustion in HCCI engines

摘要: Abstract One of the major problems associated with HCCI combustion engine application is lack direct control for timing. A proposed solution timing using a binary fuel blend in which two fuels different auto-ignition characteristics are blended at various ratios on cycle-by-cycle basis. The aim this research to investigate exergy analysis when fuel, consists n-heptane and natural gas, used. In order accomplish task, single-zone model has been developed, performs computations complete chemical kinetics mechanism. study was carried out percentages gas EGR (exhaust recirculation) ranging from about 45 85 percent 0 40 percent, respectively. results reveal that, mass percentage increases, destruction decreased increasing second-law efficiency. Introducing into intake charge dual up some stage (optimum value) enhances performance spite reduction work.