Thermal analysis on a segmented thermoelectric generator
Thermal analysis on a segmented thermoelectric generator
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分段热电发电机的热分析
DOI：
10.1016/j.energy.2014.11.080
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发表时间：
2015-02-01
期刊：
影响因子：
9
通讯作者：
Tao, Y.
中科院分区：
文献类型：
--
作者：
Ming, T.;Wu, Y.;Tao, Y.
提高温差发电机的效率对温差发电机的广泛应用具有重要意义。提出了一种基于数学分析和电子表格计算的设计方法，以获得在300 ~ 780 K温度范围内工作的分段式热电发电器（STEG）组件的最佳效率和几何尺寸。热电材料的性质，如塞贝克系数，热导率和电导率，是温度依赖性的。同时，建立了基于数学计算的三维热电有限元模型，对STEG模型在设计工况下运行时的物理量进行了验证。仿真结果表明，该模型能够提供高于1.00 V的稳定电压，当负载电阻接近内阻时，峰值效率约为11.2%，与数学分析结果吻合较好。此外，进行了一系列的测试，以研究在不同的条件下的最佳TEG模型的性能。结果表明，STEG可以充分利用不同热电材料的特性，在大多数情况下提高效率和电压输出。(C)2014爱思唯尔有限公司版权所有。
To improve their efficiency is of vital importance for the widespread application of TEG (thermoelectric generators). A design methodology, formulated on mathematical analysis and performed by spreadsheet calculation, was advanced to derive the optimum efficiency and geometrical dimensions of the STEG (segmented thermoelectric generator) module operating between 300 K and 780 K. The properties of the thermoelectric materials, such as the Seebeck coefficient, thermal conductivity, and electrical conductivity, were temperature-dependent. Meanwhile, a three-dimensional thermoelectric finite element model based on mathematical calculation was established to examine and verify the physical quantities when the STEG model operated in design condition. The simulation results indicated that this model is able to supply a steady voltage higher than 1.00 V and that the peak efficiency is about 11.2% when the load resistance is close to the internal resistance, which matches well with the mathematical analysis results. Furthermore, a series of tests were carried out to investigate the performance of an optimum TEG model under different conditions. It was found that the STEG can take full use of characteristics of different thermoelectric materials, and increase the efficiency and voltage output in most situations. (C) 2014 Elsevier Ltd. All rights reserved.