冷藏车车厢结构优化设计及关键参数分析  

Structure optimization and key parameters analysis of a refrigerated truck carriage

作　　者：李细霞 吕东霖 李长玉 LI Xixia;Lv Donglin;LI Changyu(School of Automotive and Traffic Engineering,Guangzhou College of South China University of Technology,Guangzhou 510800,China)

机构地区：[1]华南理工大学广州学院汽车与交通工程学院,广州510800

出　　处：《中国工程机械学报》2018年第4期316-320,共5页Chinese Journal of Construction Machinery

基　　金：广东省青年创新类人才资助项目(2016KQNCX226);广东省质量工程资助项目(51-SC150201)

摘　　要：设计了一种三层复合板结构的冷藏汽车车厢和厢内冷空气导流机构,建立了其瞬态传热模型,利用有限元方法对模型进行了求解,分析了隔热层厚度、冷藏温度、空气温度、车速等几个参数对车厢漏热速率的影响.发现隔热层厚度取80mm时比30mm时漏热速率降低了6.79W/m2,冷藏温度和空气温度相差越大,漏热速率越大,车速增加漏热速率有所增加,但并不明显.设计的车厢结构有利于增加其质量利用率,其导流机构有利于车厢内温度均匀分布.分析结果可为车厢设计时关键参数选取提供一定的依据.A refrigerator truck carriage with three layers of composite plates was designed,then the flow guiding mechanism in the carriage is designed to guide the flow of cold air,the transient heat transfer model is established,the finite element method is used to solve the model,the influence of several parameters,such as heat insulation thickness,cold temperature,air temperature,car speed,and so on,on the heat leakage rate of the carriage is analyzed.It is found that if the thickness of thermal insulation layer is 80 mm the heat leakage rate of the carriage is about 6.79 W/m 2 lower than that of 30 mm,the greater the difference between the cold temperature and the air temperature,the greater the rate of heat leakage,the heat leakage rate increases with the speed of the truck,but it’s not obvious.The designed carriage structure is beneficial to increase its quality utilization rate,and the guiding mechanism is favorable for the uniform temperature distribution inside the carriage,the analysis results can provide some basis for selecting the key parameters in the design of the carriage.

关 键 词：冷藏车 保冷效果 漏热速率 导流机构 

分 类 号：TH113.1[机械工程—机械设计及理论]