Comprehensive analysis of thermoelectric generation systems for automotive applications
Comprehensive analysis of thermoelectric generation systems for automotive applications
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DOI：
10.1016/j.applthermaleng.2016.09.121
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发表时间：
2017-02
影响因子：
6.4
通讯作者：
R. Stobart;M. Wijewardane;Zhijia Yang
中科院分区：
文献类型：
--
作者：
R. Stobart;M. Wijewardane;Zhijia Yang
随着针对车辆的二氧化碳排放立法的引入，车辆推进系统中的燃料效率的压力显著增加。成本效益效率的提高已成为密集的研究工作的主题。在这些效率措施中，废热回收（WHR）在工业和学术界都引起了浓厚的兴趣。作为一种潜在的低维护固态实现，热电发电机（TEG）代表了一个有前途的候选技术。与其他WHR方法相比，热电（TE）解决方案具有吸引人的简单性，可以快速转化为强大的工程解决方案。然而，实现具有竞争力的效率和低制造成本仍然是一个重大的研究挑战。对取得进展至关重要的是能够制定和评估解决方案的建模过程。本文报道的工作表明，利用主流计算流体动力学（CFD）代码的建模过程是可行的。一个基准TEG设计首先模拟，然后在发动机试验台上运行，模拟和实验之间的一致性在10%以内。封闭形式的优化性能的模块和整体TEG设计的结果已在文献中报道，并提供重要的见解，实施方法。然而，实际实施必须考虑热交换过程中的变化条件和空间变化。一个CFD代码，将允许详细评估TEG参数和材料性能已被证明与板翅式换热器设计。与此同时，一个更简单的模型与CFD代码的一致性在12%以内，表明快速建模过程是可行的，可以支持新的“在环”测试技术。
With the introduction of carbon dioxide emissions legislation for vehicles, the pressure on fuel efficiency in vehicle propulsion systems has grown significantly. Cost-effective efficiency improvements have become the topic of intensive research efforts. Amongst such efficiency measures, waste heat recovery (WHR) has attracted a deep interest both in the industrial and academic sectors. As a potentially low maintenance solid-state implementation, the thermo-electric generator (TEG) represents a promising candidate technology. Thermoelectric (TE) solutions, compared with other WHR methods have an appealing simplicity that could translate rapidly into robust engineering solutions. Achieving competitive efficiencies and low manufacturing cost however remains a substantial research challenge. Critical to progress are modelling processes that allow solutions to be formulated and assessed. The work reported in this paper demonstrates that a modelling process that makes use of mainstream computational fluid dynamics (CFD) codes is feasible. A benchmark TEG design first simulated and then run on an engine test bed showed agreement between simulation and experiment to within 10%.Closed form results for the optimised performance of module and overall TEG design have been reported in the literature and lend important insights into implementation methods. However practical implementation must take account of varying conditions and spatial variations in the heat exchange process. A CFD code that would permit a detailed evaluation TEG parameters and material properties has been demonstrated with a plate-fin design of heat exchanger. Meanwhile a simpler model has achieved agreement to within 12% with the CFD code indicating that a rapid modelling process is feasible and could support new “in the loop” test techniques.