随着热电转换效率的提高，作为节能减排前瞻性关键技术的热电发电技术在商用车领域应用前景看好。项目以kW级大功率商用车热电发电系统为研究对象，围绕热电耦合机理、模块拓扑对系统能效影响规律、分布式能源系统能效综合优化三个科学问题开展研究：建立非均匀温度场下计及变物性参数的热电发电器热阻网络模型，阐明车载热电发电器热传递特性及热电耦合机理；研究系统能效与关键参数及模块拓扑的相关性模型，系统地揭示车载热电发电器模块拓扑对其输出能效的影响规律；建立热电发电分布式能源系统MLD集成模型，提出一种面向低速低负荷、低速高负荷、高速低负荷及高速高负荷四种典型能量流的多模型预测控制策略，形成兼顾热电发电器及系统能效的优化体系及方法。以上研究基于测试台架与东风天龙商用车完成台架与实车的综合验证与评价。项目研究成果将为汽车尾气热电发电系统及整车应用奠定理论基础，对提高热电发电系统综合能效具有重要的理论指导意义。

With the improvement of thermoelectric conversion efficiency, thermoelectric power generation technology has good prospects in the commercial vehicle field, which is a key technology for energy conservation and emission reduction. The research object of the project is kW class high-power thermoelectric power generation system of commercial vehicle. And three scientific problems are studied, including the thermoelectric coupling mechanism, the influence law of Modular Topology on its system Energy efficiency, and the optimization control of energy efficiency for the distributed energy system. Firstly, the heat transfer characteristics of the on-board thermoelectric generator and the thermoelectric coupling mechanism is illustrated by establishing a thermal resistance network model of the thermoelectric generator with variable properties and non-uniform temperature field; Secondly, the correlation model between the system energy efficiency and key parameters and module topology is built, and the influence law of the module topology on the output energy efficiency is systematically revealed. And then, the MLD integration model of the distributed energy system is established. Finally, a multi-model predictive control strategy is proposed based on the four different energy flows including the low-speed low-load mode, low-speed high-load mode, high-speed low-load mode and high-speed high-load mode, to form an optimization system and method for both thermoelectric generator and system energy efficiency. The above research is based on the comprehensive verification and evaluation of test bench and dongfeng tianlong commercial vehicle. The research results of the project will lay a new theoretical foundation for the automobile exhaust thermoelectric power generation system and the whole vehicle application, and have an important theoretical guiding significance for improving the comprehensive energy efficiency of the power generation system.