WITHDRAWN: Mathematical modeling of small-scale combustion systems for hydrogen production

Abstract

This study relates to the mathematical modeling of small-scale combustion systems for hydrogen production. The problem is addressed for premixed combustion systems. Computational fluid dynamics simulations are conducted to gain insights into the performance of small-scale combustion systems for hydrogen production. Full detailed descriptions are employed. The factors affecting the performance of small-scale combustion systems are determined for hydrogen production. Particular focus is placed on determining essential factors that affect the performance of small-scale premixed combustion systems. The results indicate that the predictions are in satisfactory agreement with the data obtained from experimental measurements. The thermal conductivity of the channel walls is fundamentally important. The wall thermal conductivity is vital in determining the flame stability of the burner. Further improvement in flame stability can be achieved by using anisotropic walls. Combustion at the microscale can offer many advantages. Faster ignition and more efficient heat transfer can be achieved, but the design is challenging due to the loss of flame stability. The change in specific enthalpy is positive for the exothermic reaction and negative for the endothermic reaction. The change in specific sensible enthalpy is always positive. Design recommendations are made to improve thermal performance for the reactor. Suggested directions of future research are also indicated.