Abstract: 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.

Key words: thermal oil, electrical heating furnace, numerical simulation, tube arrangement design, support plate form

摘要： 导热油电加热炉的开发对工业导热油炉实现绿色低碳排放，甚至零碳排放具有深远影响。参照管壳式换热器的设计方法和流程，提出了一种管壳式导热油电加热炉，采用RNG k-ε模型、二阶迎风格式、半隐式压力速度耦合方法，分析了不同布管方式和加热管间距、不同支撑板形式和支撑板间距条件下的电加热炉内导热油流动和温度分布的影响规律。结果表明，25 mm管间距三角形布管方式优于35 mm管间距三角形布管及正方形布管方式，500 mm板间距梅花形支撑板相较于其他布管方式的温度分布更均匀，最高温度满足工艺及安全运行需求。新型管壳式导热油电加热炉的结构设计可以满足导热油的升温需求，研究结果对于指导现有导热油炉的绿色零碳排放的改造升级具有重要意义。

关键词: 导热油, 电加热炉, 数值模拟, 排管设计, 支撑板形式