Thermal Performance of a Single-Layer Porous Radiant Burner with Biogas as Fuel: A Numerical Study

Raw biogas has the ability to minimise waste and greenhouse gas emissions while also helping to meet the world's insatiable energy needs. In this chapter, a circular Porous Radiant Burner (PRB) consisting of silicon carbide (SiC) foam is examined for its ability to substitute raw biogas. Raw biogas mixtures were examined on PRB using ANSYS 19 at firing rates ranging from 1 to 2 kW, and stable combustion was noted over an equivalence ratio range of 0.7–0.95. The increase in fire rate and equivalence ratio increased surface temperature, whereas radiation efficiency increased primarily as an outcome of the increase in equivalence ratio. Within the range of fire rates of 1–2 kW and equivalency ratio of 0.7–0.95, the PRB functions steadily with radiation efficiency of 12.4–37.5%. Furthermore, the newly developed PRB delivers more radiation efficiency for raw biogas than prior systems used in submerged mode.