车载热电转换系统多物理场仿真研究
Multi-physical field simulation of vehicle-based ther-moelectric conversion system
针对车辆热电联供和余热回收，通过车载热电转换系统利用热能并转化为电能是一种有效途径。使用COMSOL软件，并考虑系统内多物理场耦合机理，对搭载了48个温差发电片的单排气入口热电转换系统进行了数值模拟，获得了系统内流-热-电多物理场分布。利用控制变量的方法，主要探讨了排气温度和冷却水流量对热电转换系统内温度特性和电输出性能的影响。最后，对比不同内部结构的集热器下的系统性能，明确了集热器结构优化对系统性能提升的重要性。
In view of cogeneration and waste heat recovery of vehicles, it is an effective way to utilize heat energy and convert it into electricity through vehicle-based thermoelectric conversion system. Using COMSOL software and considering the coupling mechanism of mul-tiple physical fields in the system, a single exhaust inlet thermoelectric conversion system equipped with 48 temperature difference generators is numerically simulated, and the multi-physical field distribution in the system is obtained. The influence of exhaust tem-perature and cooling water flow on temperature characteristics and electrical output performance of thermoelectric conversion system is mainly discussed by using control variable method. Finally, comparing the system performance of different internal structures of the heat collector, it is clear that the collector structure optimization is important to improve the system performance.
朱兴壮;王东杰;左正兴;谷操;王伟;
北京理工大学 机械与车辆学院,北京 100081;中国北方车辆研究所,北京 100072;北京理工大学 机械与车辆学院,北京 100081;中国北方车辆研究所,北京 100072;北京理工大学 机械与车辆学院,北京 100081;
TK422
thermoelectric conversion system exhaust temperature cooling water flow output power collector
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