双层保温热力管路的数值计算

为了求解热力管路双保温层经济厚度,综合考虑了各种约束条件,用Visual Basic 6.0语言设计了求解程序,因为保温材料的导热系数随温度而变化,采用迭代法求解了每层材料的平均温度,并给出了计算程序。通过ANSYS12.0软件模拟了管路横截面温度场,绘制了管路径向温度变化曲线,分析得出,在内外层保温材料厚度相同且均满足工程实际耐热性与抗压性等条件下,导热系数较小的材料放在内层相比于放在外层来说,单位管长散热量较少。

Numerical Calculation of Thermal Pipeline of Double Insulating Layers

In order to solve the economical thickness of thermal pipeline of double insulating layers, various kinds of constraint conditions had been considered, the solving program was designed by Visual Basic 6.0. Because the coefficient of thermal conductivity of thermal insulating material changes with temperature, the average temperature of the every layer material was solved by iterating and its calculating program was designed. Pipeline temperature field was simulated by ANSYS12.0, and radial temperature change curve of pipeline was drawed. When innner and external material with the same thickness both meet conditions of the engineering practical heat resistance and resistance, and coefficient of thermal conductivity of the inner material is smaller than external material, heat dissipating capacity of per unit length of pipeline is less.