Design of Micro Combustor fueled with Hydrogen for Enhancement of Wall Temperature and Emissive Power

This research is to study the numerical model of hydrogen combustion in micro combustor to enhance the energy converted to electricity by analysis of wall temperature and emissive power. This research focuses on the effected parameters of micro combustor geometry (rectangle, cylinder, hexagon), exhaust gas recirculation (EGR) at 1.8551x10^-5 kg/s of hydrogen mass flow rate and equivalence ratio 1.0. As the result, 18.8-19.7 °C of wall temperature and 12.2-12.4% of emissive power from cylindrical and hexagonal micro combustor are higher than of rectangular micro combustor. Moreover, 11.3-32.3°C of wall temperature are increased from installing hexagonal EGR and cylindrical EGR. It concluded that the design of cylindrical and hexagonal micro combustor with cylindrical and hexagonal EGR cover with porous media has the highest emissive power of 15.72 watt more than referenced model 33.7%.