March 28, 2024
Ahmad Jamekhorshid

Ahmad Jamekhorshid

Academic Rank: Assistant professor
Address: Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University, Bushehr 75169, Iran
Degree: Ph.D in Chemical Engineering
Phone: +987731222628
Faculty: Faculty of Petroleum, Gas and Petrochemical Engineering

Research

Title
Investigation of the brick arrangements effects in the reformer duct on outlet flue gas temperature and furnace radiant efficiency using computational fluid dynamics
Type Thesis
Keywords
ديناميك سيالات محاسباتي؛ ريفرمر بخار؛ محفظه احتراق؛ ضريب نشرپوشش سراميكي
Researchers Azadeh Mirvakili (Primary advisor) , Ahmad Jamekhorshid (Primary advisor)

Abstract

In this study, the reformer furnace was evaluated by three-dimensional simulation via Computational Fluid Dynamic (CFD) and results were compared with industrial data and they were validated. Computational Fluid Dynamic (CFD) was applied to compare the performance of this reformer at the first and tenth years of operation. Results showed that a 10% increase in fuel consumption in the tenth year cannot compensate for all temperature drop in skin tubes, and there was still a 14 K temperature drop. Also, a 35 K increase of flue gas temperature in the outlet of the furnace. Also, a 23% increase in fuel consumption can offset the temperature drop in the tenth year, however the flue gas temperature increased about 60 K, it had negative effect on the conviction section of the reformer. This study, the effect of changing the bricks arrangements was investigated and results showed that the bricks arrangements in the design condition was optimum and flue gases sucked in the down tunnel. The flue gas moved straight through the furnace from top to bottom of the furnace. The results showed that the emissivity factors changing had significant affect along time on the radiation energy portion. The ceramic coating utilization on the surface wall of furnace can compensate the emissivity factor reduction. The Cetak coating with emissivity factor 0.9 was investigated and results showed that coating utilization can increase 19 K of skin tubes temperature. Therefore, the coating using in the furnace can save fuel consumption about 7%. Another point was the fuel components changing along time. The results showed that the enhanced hydrogen content in fuel leads to a decrease the radiation energy portion.