【作者】 申思；

【导师】 邓亚东； 苏楚奇；

【作者基本信息】 武汉理工大学 ， 车辆工程， 2012， 硕士

【摘要】 随着我国社会的进步和发展,汽车变得越来越普及,2011年我国的汽车市场继续持续增长,全年汽车销量已经突破1850万辆。如何节省燃油的消耗以及降低污染和排放成为现在汽车行业发展的关键问题。温差发电技术是一种利用半导体材料实现热能和电能直接转换的绿色技术,而汽车尾气废热含有大量的热量,可以将其利用起来产生电能,从而提高了汽车的燃油利用率,实现了节能减排。本文的研究是基于武汉理工大学的温差发电实验台架,介绍了汽车尾气废热温差发电系统的结构和原理以及新的车载电源系统的构成。建立了温差发电器的数学模型,以及温差发电器的输入输出特性。就如何提高温差发电器的发电量和发电效率,从热电模块和热电材料的性能、热电模块的几何尺寸、热电模块的拓扑结构和连接方式、热端和冷端的结构以及冷却方式和夹紧方式等方面进行了讨论和研究。本文的重点是讨论基于汽车尾气温差发电系统的车载电源系统的能量管理和控制策略。本文对车载电源的子系统进行了建模,同时基于Advisor平台,构建了基于新型车载电源系统的整车仿真模型。在新的电源系统及其管理和控制模式下,结合不同的电气负载工况进行了仿真,研究了电源系统能量流的情况,并对仿真结果进行了比较和分析。仿真结果也证实了在新的电源系统及其管理和控制模式下,整车的燃油经济性确实得到了提高。本文的另一个重点是车载电源系统各子模型的建立,特别是温差发电模型的建立及其优化。需要优化的参数很多,且每个参数的优化需要与不同学科进行交叉以及运用相应的仿真软件,如气箱和水箱结构的优化需要热力学的知识及CFD软件,夹紧方式的优化则需要力学知识及ANSYS软件,热电模块的拓扑结构和连接方式的优化则涉及到电工学。更多还原

【Abstract】 With the development of society, the vehicle is becoming more and more popular. In2011China’s automobile market continues to sustained growth. The annual car sales have exceeded18.5million. How to realize the energy-saving and emission-reduction has become a key problem of the automobile industry. The thermoelectric generation is a green technology, which can convert heat energy to electrical energy by using semiconductor materials. As the car tail gas contains a lot of heat, it can be used to create electricity. As a result, we improve the fuel efficiency of the car, realizing the energy saving and emission reduction.This study is based on the thermoelectric generation test bench of wuhan university of technology, introducing the structure and theory of automobile exhaust waste heat thermoelectric generation system, as well as the structure of vehicle power source. And in this paper the mathematical model of thermoelectric generator is established, whose input/output characteristics are also contained. On how to improve the thermoelectric generator’s power and efficiency, the related factors are discussed and researched, such as the performance of the thermoelectric module and thermoelectric materials, the geometry size of the thermoelectric module, the topology structure and connection of the thermoelectric module, the structure of the hot side and cold side, the cooling method, the clamping way and so on.The focus of this paper is the research of energy management and control strategy of vehicle power supply system based on automobile exhaust waste heat thermoelectric generation. This paper build models of the subsystems of the vehicle power supply system, as well as the vehicle simulation model based on new vehicle power supply system based on the ADVISOR platform. Do the simulation of the new vehicle power supply system, selecting different electric loads. And then analyse the energy flow of the power supply system. Meanwhile the simulation results are compared and analysed. The simulation results confirm that the vehicle fuel economy is improved based on the new power supply system and the new control strategy.Another emphasis of this paper is how to build the models of the subsystems of the vehicle power supply system, especially the thermoelectric generation system. To optimize the model of the thermoelectric generator is also very difficult, because there are many parameters to optimize. What’s more, most of the parameters’ optimizing ask for different discipline theory knowledge and the corresponding simulation software. For example, to optimize the structure of gas box and the water box requires the thermodynamics knowledge and the CFD software. To optimize the clamping way requires the mechanics knowledge and the ANSYS software. To optimize topology structure and connection of the thermoelectric module requires electrical knowledge.更多还原