火积理论在高炉冷却壁性能评价中的应用

Application of Entransy Theory to the Performance Evaluation of Blast Furnace Stave

基于火积理论分析得出了高炉冷却壁的火积平衡方程式以及冷却壁中的火积耗散.在此基础上定义了高炉冷却壁的热阻.根据最小热阻原理,提出用高炉冷却壁的热阻来评价其传热性能的优劣的观点,通过实例说明了高炉冷却壁热阻的计算方法,比较了不同冷却水管间距下冷却壁热面最高温度及热阻之间的关系.结果表明,随着冷却水管间距的改变,冷却壁热阻与热面最高温度有相同的变化趋势.在一定的边界条件下,高炉冷却壁的热阻可以评价其传热性能的优劣.

Based on entransy theory, the entransy balance equation and the entransy dissipation of blast furnace stave are obtained. On this basis, the thermal resistance of blast furnace stave is defined. According to the principle of minimum thermal resistance, thermal resistance is proposed to evaluate the heat transfer performance of blast furnace stave. The calculation method of the thermal resistance of blast furnace stave is illustrated with a practical problem. The relationship of maximum temperature of the stave hot face and thermal resistance with different cooling pipe space is compared. The results show that with the change of cooling pipe space, maximum temperature of the stave hot face and thermal resistance have the same trend. Under the certain boundary conditions, the heat transfer performance of blast furnace stave can be evaluated by the thermal resistance.