高温热管换热器稳定性设计及结构参数优化

Study on Design of Reliability and Structure Optimum for High Temperature Heat Pipe Heat Exchanger

利用三次设计的优化方法对高温热管换热器冷热流体侧翅片间距、翅片厚度、管束横向管间距、冷热流体迎风流速、迎风面宽度及加热段长度进行了最优参数组合,找出了高温热管换热器投资回收年限最小的最优解,最大限度地降低了投资成本,减小了运行费用。同时对各温度区域热管换热器进行了可靠性和稳定性设计研究,指出了过渡段采用强化管可以大幅度提高高温热管换热器在变工况下运行的稳定性和可靠性。随后借助神经网络的方法对优化结果进行了模拟仿真,从而确定出最佳方案,其结果可为完善高温热管换热器结构优化设计提供一个新的方法。

Three optimization simulation studies were conducted using the parameter design method of computable items for HTHPHE to determine the optimum parameter combination of fin spacing on cold and hot fluid sides, fin thickness, transversal pipe spacing in the pipe bundle, windward flow rate of cold and hot fluids, width of windward side and the heating segment length of HTHPHE under actual operation conditions,so that the shortest period of investment recow y and minimum operation cost were achieved. Design study on the reliability and stability of heat pipe heat exchangers of different temperature sections greatly improved the operation stability and reliability of heat pipe elements in the transition zone of HTHPHE under changing operation condition. The nerve network method was used for simulation of the optimized result, thus to determine the optimum principle. It provide theoretical basis for further optimizing of design of HTH-PHE structure.