Realizing a thermoelectric conversion efficiency of 12% in bismuth telluride/skutterudite segmented modules through full-parameter optimization and energy-loss minimized integration
Realizing a thermoelectric conversion efficiency of 12% in bismuth telluride/skutterudite segmented modules through full-parameter optimization and energy-loss minimized integration
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实现%20a%20热电%20转换%20效率%20of%2012%%20in%20铋%20碲化物/方钴矿%20分段%20模块%20through%20全参数%20优化%20和%20能量损失%20最小化%20集成
DOI：
10.1039/c7ee00447h
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发表时间：
2017-04
影响因子：
32.5
通讯作者：
Chen Lidong
中科院分区：
文献类型：
--
作者：
Zhang Qihao;Liao Jincheng;Tang Yunshan;Gu Ming;Ming Chen;Qiu Pengfei;Bai Shengqiang;Shi Xun;Uher Ctirad;Chen Lidong
近几十年来，通过不断提高各种热电（TE）材料的品质因数ZT，固态TE技术已经成熟，并且即将在真实的工业环境中产生影响，作为一种有前途的收集工业废热并将其转化为有用电力的方法。然而，实际的TE模块开发仍然停滞不前，效率相当低。这就迫切需要设计合理的模块结构，依赖于复杂的参数优化和利用有效的集成技术，最大限度地减少各种接口的结合过程中的能量损失。在这里，我们展示了一个三维数值分析模型的分段TE发电设备，它考虑到温度依赖性材料的属性和各种寄生损耗。该模型生成具有预测性能的优化设计，以实现最大的转换效率。结合开发的键合方案和组装技术，成功制造了由Bi2Te3基合金和CoSb 3基填充方钴矿组成的分段模块，在541 °C的温差下工作时，效率高达12%。基于数值分析模型的合理结构设计和极低的热电损耗，使热电转换效率达到基于TE材料本身理论效率的96.9%。这些发现突出了基于TE材料的本征性质的TE发电设备的优化策略的重要性，并表明可以制造具有预测的高效率和高功率密度的实际高温TE模块，这为在大规模TE应用中实现高转换效率提供了有用的指导。
In recent decades, by continuously enhancing the figure of merit ZT of various thermoelectric (TE) materials, solid state TE technology has matured and is on the verge of making an impact in real industrial settings as a promising approach to harvest waste industrial heat and convert it to useful electricity. Nevertheless, actual TE module development has remained stagnant with rather poor efficiencies. This has raised an urgent need to design rational module structures that rely on complex parameter optimization and utilization of efficient integration technologies that minimize energy losses during bonding of various interfaces. Here, we demonstrate a three-dimensional numerical analysis model of a segmented TE power-generating device, which takes into account the temperature-dependent materials' properties and various parasitic losses. The model generates an optimized design with predictive performance to realize maximum conversion efficiency. Combined with the developed bonding schemes and assembly techniques, the segmented modules consisting of Bi2Te3-based alloys and CoSb3-based filled skutterudites were successfully fabricated with a record-high efficiency of up to 12% when operating under a temperature difference of 541 °C. The rational structure design based on the numerical analysis model and the extremely low thermal and electrical losses enable the heat-to-electricity conversion efficiency to reach up to 96.9% of the theoretical efficiency based on the TE materials themselves. These findings highlight the importance of the optimization strategy for TE power generation devices based on the TE materials' intrinsic properties and demonstrate that realistic high temperature TE modules with predictive high efficiency and high power density can be fabricated, which provides a useful guide to achieve a high conversion efficiency in large-scale TE applications.
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DOI：
10.1088/0022-3727/42/1/015502
发表时间：
2009-01
期刊：
Journal of Physics D: Applied Physics
影响因子：
--
作者：
Ajay Singh;S. Bhattacharya;C. Thinaharan;D. K. Aswal;S. Gupta;J. Yakhmi;K. Bhanumurthy
通讯作者：
Ajay Singh;S. Bhattacharya;C. Thinaharan;D. K. Aswal;S. Gupta;J. Yakhmi;K. Bhanumurthy
影响因子：
41.2
作者：
Liu, Huili;Shi, Xun;Snyder, G. Jeffrey
通讯作者：
Snyder, G. Jeffrey
DOI：
10.1109/ict.2001.979888
发表时间：
2001-06
期刊：
Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)
影响因子：
--
作者：
T. Caillat;J. Fleurial;G. J. Snyder;A. Borshchevsky
通讯作者：
T. Caillat;J. Fleurial;G. J. Snyder;A. Borshchevsky
影响因子：
64.8
作者：
Biswas, Kanishka;He, Jiaqing;Kanatzidis, Mercouri G.
通讯作者：
Kanatzidis, Mercouri G.
影响因子：
56.9
作者：
Kim, Sang Il;Lee, Kyu Hyoung;Kim, Sung Wng
通讯作者：
Kim, Sung Wng