Superadiabatic Radiant Porous Burner With Preheater and Radiation Corridors

The thermal efficiency of radiant porous burners is less than 25% because most of the combustion heat is lost by flue gas. Here, we present a new radiant burner design to recuperate the heat of the exit flue gas using a preheater to increase the inlet air temperature and raise the flame temperature locally above adiabatic temperature (superadiabatic) at fuel-lean conditions. The superadiabatic heat is then conducted through embedded radiation corridors and is radiated, at a higher temperature than the flue gas, to target. This paper presents the results of the superadiabatic radiant porous burner from a numerical analysis using a zero-order combustion reaction model for methane/air mixture and non-thermal equilibrium formulation. The thermal efficiency over 40% is predicted.