R134a汽车空调及整车降温性能仿真优化分析

本文通过KULI仿真软件搭建整车降温模型,计算并分析了中间换热器(又称同轴管,IHX)、后出风吹面装置以及乘员舱衣帽架对乘员舱降温性能的影响,对比了其单一装置及其组合方案对整车降温性能的影响。分析结果显示当取消单一功能配置时,衣帽架对乘员舱降温性能影响较大,平均温度升高2.2~2.4℃;后吹面装置次之,平均温度升高0.6~0.8℃;同轴管的影响最小,平均温度升高0.2~0.4℃。而且衣帽架单一装置对乘员舱降温性能的影响大于同轴管和后出风吹面装置组合对乘员舱降温的影响。通过仿真计算为整车及后续车辆开发提供了一定的理论依据及优化方案。

Simulation and optimization of R134a vehicle air conditioning system and whole vehicle cool down

In this paper,the whole vehicle cool down model is built by using the KULI simulation software.The effects of intermediate heat exchanger(also known as coaxial tube,IHX),rear air blowing device and cabin coat rack on the cool down performance of vehicle cabin are calculated and analyzed.The influence of the single device and its combination about the cool down performance of the vehicle cabin is compared.The results show that the cabin hallstand has a great influence on the cool down performance,average temperature rises by 2.2~2.4℃;the effect of rear air ducts configuration is smaller,average temperature rises by 0.6~0.8℃;and the influence of the coaxial tube is the smallest,average temperature rises by 0.2~0.4℃.The effect on the cabin cool down performance of the cabin hallstand lonely is greater than the effect of the combination of the coaxial tube and the rear air ducts configuration.The simulation calculation provides a certain theoretical basis optimization scheme for the development of the whole vehicle and the following vehicle.