综合性能优化在板翅式换热器设计中的应用

Applications of the Comprehensive Performance Optimum in the Design of Plate-Fin Heat Exchangers

采用综合性能优化设计方法,运用计算机语言编制程序,以单位传热量的可用能损失率最小为目标函数,寻求流动参数的最佳值,利用换热器两侧流动换热过程的流动与换热的准则关系式,在设定换热热流密度和选定换热器某个结构尺寸的基础上,采用迭代的方式完成燃气-空气单侧翅片的板翅式换热单元的结构参数、流动参数与换热性能的优化设计。

The optimum design method of comprehensive performance and the compiled program of computer languages were used to seek an optimal value of flow parameters with the minimum loss rate of usable energy of unit heat transfer amount as objective function. Based on setting the heat current density of heat exchange and selecting a structure size of heat exchangers, the criterion relation of the flow and heat exchange of the flow heat exchange process at the two sides of heat exchangers and the iterative mode were used to complete the optimum designs of structure parameters, flow parameters, and heat exchange performance of the plate-fin heat exchange unit of a fuel gas-air single side fin.