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Thermoelectric Generators for Automotive Applications: Holistic Optimization and Validation by a Functional Prototype
Journal of Electronic Materials ( IF 2.1 ) Pub Date : 2020-02-05 , DOI: 10.1007/s11664-020-07963-9
Martin Kober , Timo Knobelspies , Aina Rossello , Lars Heber

Abstract

Current research has led to a significant improvement at the system level of thermoelectric generators (TEG) for automotive applications. The previously low power density could be increased considerably up to 267 W/kg and 478 W/dm3. In addition, the cost–benefit ratio of the technology in the overall system of the vehicle was improved through intensive optimizations on system level. The results presented so far are based on measurement data of single thermoelectric modules (TEM) and simulation of the TEG system. In this paper the high simulative increases at the system level, achieved through a holistic optimization method, are validated by a functional prototype, completely equipped with TEM. Thereby, a functional prototype has been developed and built successfully and measured on a hot gas test bench. In the experiment all TEM show a stable power output and the highest gravimetric power density of automotive TEG systems known to the authors could be measured. Further tests will be performed with the functional prototype as described in the outlook. In addition to the successful tests, the simulation is validated with the detailed measurement data. After adapting the measurement method of the TEM for providing more accurate TEM measurement data as input for the simulation, a suitable match could be achieved between the TEG simulation and the experiment. In the measurement points performed so far, the accuracy of the simulated temperatures reaches more than 95%. The accuracy of the simulated output power is more than 97%.



中文翻译:

用于汽车应用的热电发电机:通过功能原型进行整体优化和验证

摘要

当前的研究已导致用于汽车应用的热电发电机(TEG)的系统水平有了重大改进。以前的低功率密度可以提高到267 W / kg和478 W / dm 3。此外,通过在系统级别上进行深入的优化,提高了该技术在车辆整个系统中的成本效益比。到目前为止提供的结果基于单个热电模块(TEM)的测量数据和TEG系统的仿真。在本文中,通过整体优化方法实现的系统级高仿真增长已通过完全配备TEM的功能原型得到了验证。因此,已经成功开发并制造了功能原型,并在热气测试台上进行了测量。在实验中,所有TEM都显示出稳定的功率输出,并且可以测量作者已知的汽车TEG系统的最高重量功率密度。如前景所述,将对功能原型进行进一步的测试。除了成功的测试之外,还使用详细的测量数据对仿真进行了验证。在调整TEM的测量方法以提供更准确的TEM测量数据作为仿真输入之后,可以在TEG仿真和实验之间实现合适的匹配。到目前为止,在执行的测量点中,模拟温度的精度达到95%以上。模拟输出功率的精度超过97%。模拟温度的准确性达到95%以上。模拟输出功率的精度超过97%。模拟温度的准确性达到95%以上。模拟输出功率的精度超过97%。

更新日期:2020-02-10
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