Matching and optimization for a thermoelectric generator applied in an extended-range electric vehicle for waste heat recovery
Matching and optimization for a thermoelectric generator applied in an extended-range electric vehicle for waste heat recovery
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DOI：
10.1016/j.apenergy.2022.118783
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发表时间：
2022-03-09
期刊：
影响因子：
11.2
通讯作者：
Wang, Xiaonan
中科院分区：
文献类型：
--
作者：
Lan, Song;Stobart, Richard;Wang, Xiaonan
在传统燃油汽车中，由于在不同的行驶循环中发动机功率的变化，通常很难找到热电发电机（TEG）的设计点。相比之下，增程式电动汽车（EEV）的发动机与道路负载分离，在大多数情况下仅在单个工作点工作，因此特别适合TEG优化设计。本文介绍了一种基于TEG保护和高净功率密度两个标准来匹配优化TEG和EEV的方法。从TEG重量、增加的电泵功耗和背压对TEG性能的权衡都被考虑在内。在此基础上，对TEG的电负载电阻和配置进行了优化，与初步设计的TEG相比，净功率密度提高了11.6%。将优化后的集成在EEV中的TEG （EEV-TEG）与传统EEV的燃油经济性进行了比较。对比结果表明，EEV-TEG可使当量油耗降低1.7%，高于传统燃油汽车使用的TEG。这些结果显示了TEG方法对eev的重要性。
In a conventional fuel vehicle, it is always difficult to find design points for a thermoelectric generator (TEG) because of the variation in engine power seen in different driving cycles. In contrast, the engine of an extended-range electric vehicle (EEV) is decoupled from the road load and only works at a single operating point in most cases, making it particularly suited for a TEG optimization design. This paper describes a method to match an optimized TEG to an EEV based on two criteria: TEG protection and high net power density. The trade-offs for TEG performance from TEG weight, added electric pump power consumption and backpressure are all taken into consideration. On this basis, the electric load resistance and configuration of the TEG are optimized, achieving a 11.6% increase of net power density compared to a preliminary designed TEG. The fuel economy of the optimized TEG integrated in an EEV (EEV-TEG) is assessed against that of a conventional EEV. The comparison shows that a 1.7% reduction in equivalent fuel consumption is obtained by the EEV-TEG, which is higher than that of a TEG applied in conventional fuel vehicles. These results exhibit the crucial importance of the method of and for a TEG to EEVs.