BNG_Muhammad Lutfi Irfan Bin Ahmad Tarmidi

Observation of The Emission of Biodiesel and Ammonia Mixtures Carbon-Neutral Fuel Combustion Using Diesel Engine.
Motor vehicle emissions are a major factor in the production of smog in several major cities and contribute to air pollution then ammonia-biodiesel fuel was highly recommended solution, however most suitable ambient conditions to be used in biodiesel and ammonia mixtures injection need to be investigated. Research of the ammonia and B30 biodiesel mixtures with different inlet pressure, ambient pressure and ambient temperature on nozzle flow and spray characteristics by using Computational Fluid Dynamic (CFD) was conducted using rapid compression machine (RCM) model. Variant parameters as such inlet pressure with 130 MPa, 160 MPa and 190 MPa, ambient temperatures with 850 K, 950 K and 1050 K and also variant for ambient pressure with 4 MPa, 6 MPa and 8 MPa. Significant variable in this study is different ammonia ratio which are 2%, 4% and 6% mixture with biodiesel B30 that contain respective density and viscosity. Data of velocity and turbulence kinetic energy show that the higher the viscosity and density of fuel the higher the velocity and turbulence kinetic energy spray at the injector nozzle. As fuel is moving at high speeds in a system, it is more likely to experience high turbulence kinetic energy. However, variant type of boost pressure was considered in selection of parameter conditions. Variable boost system allows flexible control, and thus optimization, of boost pressure, original power and efficiency goals of variable boost systems, these systems have proven to improve emissions and transient response as well. Other parameters as injection pressure, ambient pressure and temperature effected the result of simulation. Analysis and discussion were interpreted to understand the injection spray characteristics that influenced by ammonia percentage in fuel, injection pressure, ambient pressure and temperature could affect emission of engine.