Performance analysis of a multilayer thermoelectric generator for exhaust heat recovery of a heavy-duty diesel engine

Min He, Enhua Wang*, Yuanyin Zhang, Wen Zhang, Fujun Zhang, Changlu Zhao

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

58 引用 (Scopus)

摘要

Thermoelectric generators can be used for low-grade energy conversion. However, the design of compact and highly efficient thermoelectric generators is difficult. In this study, the performance characteristics of a multilayer thermoelectric generator are investigated for the exhaust heat recovery of a heavy-duty diesel engine. First, a mathematical model based on the finite volume method is established according to a designed thermoelectric generator. Subsequently, the working performance of the thermoelectric generator is analysed at the rated engine point. Next, the effects of some key parameters for the heat transfer process are evaluated, and the performance of the thermoelectric generator under various engine conditions is studied. Finally, the potential for the power output is estimated based on the world harmonised transient cycle. The results indicate that the output power increases with the engine load, whereas it is insensitive to the variation in the engine speed. The effects of the fin spacing and the fin height of the plain-fin heat exchanger are more significant compared with that of the fin thickness. The working parameters of the thermoelectric generator fluctuate significantly under transient conditions, and the thermoelectric conversion efficiency varies from 1.41% to 4.12%. The development of thermoelectric materials with high efficiency is critical. Furthermore, the results of this study indicate that the improvement in heat transfer between fluids and solid thermoelectric materials is important. The methodology and outcomes of this study can serve as a reference for the design and application of thermoelectric generators.

源语言英语
文章编号115298
期刊Applied Energy
274
DOI
出版状态已出版 - 15 9月 2020

指纹

探究 'Performance analysis of a multilayer thermoelectric generator for exhaust heat recovery of a heavy-duty diesel engine' 的科研主题。它们共同构成独一无二的指纹。

引用此

He, M., Wang, E., Zhang, Y., Zhang, W., Zhang, F., & Zhao, C. (2020). Performance analysis of a multilayer thermoelectric generator for exhaust heat recovery of a heavy-duty diesel engine. Applied Energy, 274, 文章 115298. https://doi.org/10.1016/j.apenergy.2020.115298