【作者】 唐鼎； 李大永； 彭颖红；

【Author】 Ding Tang,Dayong Li,Yinghong Peng (Shanghai Jiao Tong University,Shanghai,China)

【机构】 上海交通大学机械与动力工程学院；

【摘要】 管-翅式换热器是空调系统的核心部件,其性能优劣直接关系到整个产品的服役性能和使用寿命。大量试验研究证明,管翅接触热阻占到换热器总热阻的10%-20%,而且接触热阻还随着换热器工作循环增加以及翅片热疲劳的加剧而不断增大。因此,接触换热的强化是目前换热设备向节能、高效、小型化发展亟待解决的问题。本论文首先对管-翅胀接成形工艺参数进行了仿真与试验研究,分析了铜管与铝翅片的轴向接触状态,最后对胀接工艺参数的选择进行了讨论。更多还原

【Abstract】 Tube-fin heat exchanger is one of the key parts of the ACR system,and the forming quality relates to its service life and whole performance.It is evaluated with experiments that resistance from tube-fin joint occupies about 10～20%of the total thermal resistance of the heat exchanger.Furthermore,the thermal contact resistance rises rapidly with the increasing of the work cycle and the thermal fatigue of the fin collar.So in order to improve the energy efficiency,miniaturization of the heat exchanger,enhancement of the thermal contact conductance is the key problem.This article addressed numerical and experiment study on the tube-fin expanding process,and contact status has been examined.Then processing parameters of the tub expanding has been discussed.It is revealed that both forming quality and thermal performance can be improved by the comprehensive study of forming process.更多还原