摘要
依据换热器理论,建立了蓄热室内烟气和空气温度分布的一个数学模型。该模型考虑了蓄热室围墙散热损失的影响,注意到了综合传热系数、气体比热和格子砖物性参数随温度的变化,并用Runge-Kutta方法和Newton迭代法进行了数值求解。借助所建立的数学模型,模拟了烟气和空气温度沿格子体高度的分布,探讨了格子体高度、排列方式、格孔尺寸,格子砖材质、厚度和蓄热室围墙散热损失等对空气预热温度和烟气出格子体温度的影响。研究结果为蓄热室的合理设计和操作提供了理论依据。
Based on the classic theory of heat exchanger for regenerators, a mathematical model of heat transfer in regenerators was presented, having considered the heat losses through the walls of the regenerator and the temperature change with the overall heat transfer coefficient and specific heat of air and waste gases, and was numerically solved by Runge-Kutte's and Newton's iteration methods. Temperature distribution of air and waste gases against the height of a regenerator was given. Simulation has been made for the effect of the types and height of checker packings, passage sizes, and the materials and thick- ness of checkerwork on air preheat temperature and waste gases temperature at the exit of regenerators. Results can be used to improve design and operation of regenerators.
关键词
传热
数学模型
蓄热室
玻璃
窑炉
heat transfer
mathematical model
ragenerator
computer applications.
