Simulation And Experimental Of Vehicle Cabin And Components Thermal Load Under Natural Exposure

The thermal load of auto parts’ surface not only directly affects the vehicle thermal comfort and fuel economy but also is the main factors influencing on the appliance performance and climate ageing. Studying vehicle cabin and components’ thermal load can reduce the influence of environment on auto thermal environment. It’s also helpful to realize scientific thermal management and improve thermal comfort and energy efficiency. Meanwhile it provides comprehensive understanding of vehicle’s components’ solar radiation condition and temperature field, which is helpful to study auto climate ageing and reveal car climate ageing rule. The study results can provide reference and guidance for auto climate ageing experiment, reduce the blindness of the test program, make it more scientific and comprehensive, reduce the test cycle and cost. Applying the analysis results to the automobile development is significant to improve the quality of the vehicle and enhance market competitiveness.After summarizing domestic and foreign research of auto thermal environment and weathering aging, establish a research route and puts forward the research content of this article. The research object is a certain domestic vehicle. At first, auto thermal environment parameters including solar radiation、temperature and humidity is tested by experiment to know the basic information of thermal environment. The experiment also provides boundary conditions and validation data for the numerical analysis. Then on the basis of the experimental study and vehicle heat transfer mathematical model under natural exposure, numerical model of automobile thermal load is set up. The simulation results are compared to the experimental results in order to prove the validity and reliability of the numerical model and the numerical calculation method.Based on the simulation results, the research of vehicle components’ thermal load and the main influence factors and climate ageing was carried on. It is turned out that vehicle components have grim and uneven heat load under natural exposure. Changing vehicle components’ surface parameters and sunshade can effectively reduce the impact of external environment factors on thermal load. Different vehicle components have different temperature gradient value and Climate ageing factors. Solar radiation and temperature has significant effects on the TNR value of automobile interiors. The sunshade can effectively reduce the value of TNR.