Computational Analysis for Improving the Flow Structure and Temperature Distribution of a Methane Steam Reformer at Mid-Temperature Operation

When a heat recovery methane steam reformer is used, the parameters of heat transfer must be designed optimally due to its operating temperature. In this study, the flow and temperature distribution in the cylindrical tubular structure determine the heat transfer rate. The improvement of the flow and temperature distribution in the reformer when the structure of the reformer is improved is confirmed through computational analysis. Consquently, the flow uniformity of the inlet of the reformer is improved by installing a spiral vortex generator. Furthermore, the flow uniformity is improved by installing a staggered perforated plate. The baffle is installed to increase the residence time of the reformed gas, thereby increasing the high-temperature region of 800 K or more through heat transfer. Base on the results, it was confirmed that the reforming gas conversion rate could be improved.