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根据能量平衡原理导出利用节点网络方程组求解一维炉衬不稳定态传热的数学模型。按照通常的间歇式工业炉的工况因素,列出3种边界条件(按预定升温制度升、降温,按固定热流升、降温,空炉随炉冷却)用FORTRAN语言编制成通用程序。为了提高计算结果的精度,程序编制时考虑了对炉衬材料的导热系数和比热的温度修正。计算结果详尽(每一计算所在时间间隔内的计算结果包括炉衬各层分界结点的温度、内表供热流量、外表散热流量、以及整个作业周期内的累积量和炉衬的蓄热量)。
According to the principle of energy balance, a mathematical model for solving one-dimensional heat transfer in unsteady state of a furnace lining is derived. According to the working conditions of typical batch type industrial furnaces, three kinds of boundary conditions (heating up according to a predetermined heating system, cooling down, cooling with a fixed heat up, cooling, and furnace cooling in a dry furnace) are listed in the FORTRAN language. In order to improve the accuracy of the calculation results, the temperature correction of the thermal conductivity and specific heat of the lining material is taken into account in the programming. The calculation results are exhaustive. The calculation results for each calculation interval include the temperature at the boundary points of the lining of the lining, the heat supply of the internal surface, the cooling flow of the external appearance and the cumulative amount of the entire working cycle and the heat storage of the lining.