Analysis of influence of heat exchangerfouling on heat transfer performancebased on thermal fluid coupling

A study on heat transfer performance by thermal fluid coupling simulation for the fouling in a shell-tube heat exchanger used in engineering was presented. The coupling simulation was performed in a fluid and solid domains under three different fouling conditions: fouling inside the tube, fouling outside the tube, and fouling inside the shell. The flow field, temperature, and pressure distributions in the heat exchanger were solved numerically to analyze the heat transfer performance parameters, such as thermal resistance. It is found that the pressure drop of the heat exchanger and the thermal resistance of the tube wall increase by nearly 30% and 20%, respectively, when the relative fouling thickness reaches 10%. The fouling inside the tube has more impact on the heat transfer performance of the heat exchanger, and the fouling inside the shell has less impact.

基于热流固耦合的架空管道方形补偿器有限元分析

以某化工园区的架空管道方形补偿器为研究对象,该补偿器管廊有10组立柱、4层管架及27根管道,输送不同温度和压力工况的流动介质。在考虑重力、介质温度、流动对管道作用力等因素的基础上,系统、完整地建立ANSYS有限元模型,并进行了热流固耦合计算,得到了架空管道方形补偿器的位移、轴力、剪力、弯矩及应力等参数分布,找出这些参数的最大值及其位置,对二次应力进行校核验算,判断了方形补偿器的可靠性。旨在探索一套针对复杂架空管道实际应用的安全风险评估方法,为架空管道的运行安全提供技术支持。

不均匀沉降架空管道桁架桥的有限元计算分析

以某化工园区的基础不均匀沉降地段的架空管道桁架桥作为研究对象,该管道系统有10组立柱,4层管架及27根管道,输送不同温度和压力工况的流动介质。采用自动安平水准仪测量架空管道立柱的沉降值,在此基础上,考虑重力、介质温度、流动载荷等因素,系统完整地建立了ANSYS有限元模型并进行数值计算,得到了不均匀沉降架空管道桁架桥的位移、应力等参数分布;对二次应力进行了校核验算,以判断不均匀沉降地段的架空管道桁架桥的可靠性,并估算出各个立柱的临界沉降值。旨在探索一套针对不均匀沉降架空管道桁架桥实际应用的安全风险评估方法,为架空管道桁架桥的安全运行提供坚实的技术支持。