论文部分内容阅读
本文建立了满液式壳管蒸发器壳侧换热模型,分析了管束排列对换热能力的影响;根据计算结果,设计了一种管束的优化排布方式。研究结果表明,所建立模型与实验结果误差在15%以内;蒸发器上部换热管处气泡尺寸增大、数量增多,对换热有恶化作用;换热管横、纵向间距分别为22.23 mm和23.2 mm时,单管换热系数最大。本文设计的优化结构可以使单根换热管平均换热性能提高13.9%。
In this paper, shell-side heat transfer model of full liquid shell-and-tube evaporator was established, and the influence of tube bundle arrangement on heat transfer capacity was analyzed. Based on the calculation results, an optimal arrangement of tube bundles was designed. The results show that the error between the established model and the experimental result is less than 15%. The bubble size at the top of the heat exchanger in the evaporator increases and the number increases, which has a negative effect on the heat transfer. The horizontal and vertical spacing of the heat transfer tubes are 22.23 mm and 23.2 mm, the maximum single tube heat transfer coefficient. The optimized structure designed in this paper can improve the average heat transfer performance of a single heat exchange tube by 13.9%.