Abstract: Heat transfer in the radiation chamber of a cylindrical tubular heater is analyzed. An energy-conservation model using cylindrical coordinates in the form of integral and differential equations is used for describing the radiative and convective heat transfer in a combustion chamber. The Monte Carlo method and the difference method are used for solving the energy equation. For calculation inside the tubes, crude oil is treated as a mixture of many pseudo-pure components, and the Soave equation is used for the calculation of vapor-liquid equilibrium and the physical and thermo-dynamical properties of the liquid and vapor phases. Heat transfer and pressure drop of the fluid flow inside the pipe are next estimated. Results calculated by using a PDP-11/45 computer are compared with the operating data of the crude heater in a refinery. It is believed that model developed and the calculation program are acceptable.

摘要： 本文对圆筒型管式加热炉中辐射室的传热过程进行了分析.管外用比较严格的柱坐标系下能量守恒方程加以描述,得到一个积分-微分方程组,然后在一定的简化条件下,用Monte-Carlo法及差分法求解此积分-微分方程组.管内将原油分割成若于虚拟组分,采用Soave状态方程,进行多元组分的计算,直接算出汽液两相的相平衡组成以及两相的各种物理性质和热力学性质,然后进行管内传热及压力降的计算.本工作对原油常压圆筒炉用计算机进行了计算,计算结果与该炉的现场数据作了初步比较,结果表明上述方法是可行的,并很容易推广至方型炉中.