吸附式汽车空调的热力模拟及分析

Thermodynamic Simulation and Analysis on Adsorption Air Conditioning System Driven by Exhausted Gas in Automobiles

介绍了由发动机尾气驱动的吸附式汽车空调系统的结构特点，并采用数值计算方法，对加热／冷却流体与吸附床及吸附床内的传热过程进行了分析，得出了在不同工作过程中，吸附床内的温度场分布及传热特点．研究表明：在等容吸附及等容解吸过程中，有明显的“热管效应”，可大大提高吸附床内的传热性能．文中还讨论了不同工况、不同物性对性能的影响，指出提高吸附剂当量导热系数、减少与壁面的热阻是该系统成败的关键．

The characteristics of adsorption air conditioning system driven by exhausted gas in automobiles were presented. And an analysis of heat transfer process in heated/cooled fluids and adsorber was developed by numerical methods. The temperature field and heat transfer process in the adsorber were obtained. It is found that the “heat pipe effect” is apparent in isosteric heating and isosteric cooling stages, which can greatly enhance the heat transfer effectiveness. Several factors, such as working conditions and physical characteristics of adsorbent, which influence the performance of the system, were discussed. It is stressed that enhancing the effective thermal conductivity of the adsorber and decreasing the contact resistance are key technologies in this system.