Abstract
A three-dimensional numerical model is established which is for studying the unsteady thermal process in honeycomb regenerator. The numerical simulation was performed using FLUENT, a commercial Computational Fluid Dynamics (CFD) code, to compare simulation results to the test data. The temperature distribution of flue gas and air along the length way were obtained. The influence of switching time on the heat exchange is investigated as well. And the factors that influencing the best switching time were studied. The work in this study provides a theory basis and guide to the exploitation and appliance of HTAC system and the results of the numerical calculation can be used as the foundation of engineering design. The results may be utilized for design of porous media reactors and process optimization.
Highlights
High Temperature Air Combustion (HiTAC) is characterized by reactants of high-temperature and lowoxygen concentration
While one of the burners is fired using cold air fed to the base of its regenerator, exhaust gas is drawn through the other burner and down into its associated regenerator to preheat the packing, discharged to the atmosphere
For a 3-D numerical simulation model, the structure and meshes were constructed by GAMBIT and numerical solution was obtained from the commercially available Computational Fluid Dynamics (CFD) code FLUENT to investigate the thermal dynamic behavior of the honeycomb regenerator starting-up process
Summary
High Temperature Air Combustion (HiTAC) is characterized by reactants of high-temperature and lowoxygen concentration. After one switching period the air is stopped entering the cell and the flue gas is blown again into the honeycomb cell from the other end, the cycle was executed repeatedly until the temperature are the same as the previous data, the cycle becomes steady state.
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