Application on calculation of axial temperature drop along hot waxy oil pipeline;
含蜡原油热输管道轴向温降计算在大港石化公司的应用
We considered each influential factor of the axial temperature drop on a buried crude pipeline,the physical parameters of oil(density,specific heat capacity and viscosity),and general heat transmission factor that changes with temperature.
在充分考虑影响热油管道轴向温降的各个因素的基础上,并考虑油品物性(密度、比热容、黏度)和总传热系数随温度变化而变化,建立了热油管道停输时轴向温降的数学模型,模型还适用于有进分油点的管道,并用预测-校正法求解数学模型,最后进行了实例计算。
a calculation formula of axial temperature drop along hot waxy oil pipeline is deduced based on energy balance relation.
根据含蜡原油在三个不同温度区域的比热表达式,从能量平衡关系式出发,推导出了含蜡原油热输管道轴向温降的计算公式,并与苏霍夫温降公式进行了比较。
Research method and measure analysis of transverse temperature in hot rolling strip;
热轧带钢横向温度研究方法及测量分析
In order to obtain the tolerance requirement for the magnetic field homogeneity of the solenoids in electron cooling device, the source of the magnetic imperfection and its influence on the transverse temperature of electron beam were investigated by means of numerical simulation, and taking the space charge effect of electron beam into account.
分析了直螺线管磁场缺陷的来源 ,考虑了电子束的空间电荷作用 ,采用数值方法模拟计算了磁场缺陷对电子束横向温度的影响 ,获得了电子冷却装置中直螺线管磁场的均匀性要求 。