The development of heat conduction oil electric heaters has a profound impact on the realization of low-carbon and even zero-carbon emissions for industrial heat conduction oil electric heaters. This study introduces a novel shell and tube thermal oil electrical heating furnace, drawing inspiration from the design and manufacturing processes of traditional shell and tube heat exchangers. To evaluate the performance of this new furnace, a comprehensive numerical analysis is conducted using the RNG k-ε turbulence model, which is well-suited for capturing the anisotropic nature of turbulence in complex geometries. The simulation employs a second-order upwind scheme for the discretization of convection terms, ensuring accuracy in capturing the sharp gradients typically associated with high-temperature regions. Additionally, a semi-implicit pressure velocity coupling method is utilized to solve the fluid flow equations, facilitating a stable and convergent solution process.The study thoroughly examines the impact of various design parameters on the internal flow and temperature distribution within the heating furnace. The analysis reveals that a 25 mm spacing between triangular tubes outperforms both the 35 mm spacing between triangular tubes and the square tube arrangement, likely due to enhanced heat transfer and reduced flow resistance. Furthermore, the influence of support plate configurations, including their shape and spacing, is investigated. It is found that a 500 mm spacing between plum blossom-shaped support plates results in a more uniform temperature distribution across the furnace, which is crucial for efficient heat transfer and even heating. The findings suggest that the new shell and tube thermal oil electrical heating furnace is capable of meeting the heating demands of thermal oil, with the highest temperatures attained being in line with process and safety requirements. The structural design of the furnace shows promise for improving the efficiency and sustainability of industrial heating processes. The results are of great significance for guiding the green and zero carbon emission transformation and upgrading of existing heat transfer oil furnaces.