Adiabatic and isothermal configurations for Re4Si7 transverse thermoelectric power generators
Adiabatic and isothermal configurations for Re4Si7 transverse thermoelectric power generators
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Re4Si7 横向热电发电机的绝热和等温配置
DOI：
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发表时间：
2022
影响因子：
15
通讯作者：
J. Goldberger
中科院分区：
文献类型：
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作者：
Michael R. Scudder;Karl G. Koster;J. Heremans;J. Goldberger
横向热电发电机（TTEG）有潜力克服限制经典热电发电机（TEG）商业应用的两个具有挑战性的问题：触点中显着的不可逆效率损失和热端触点的热退化。 TTEG 由单一材料制成，可以在与温度梯度正交的方向上产生热电流。它们只需要一组远离热端的触点。在这里，我们通过实验探索了优化这一类热电发电设备性能的设备设计注意事项。我们制造了 Re4Si7 TTEG，并表明，位于热端和冷端中间的一组触点没有可测量的效率损失。我们表明，必须考虑一个新的影响：横向热梯度的出现导致在等温和绝热几何结构中实现的 TTEG 性能之间存在显着差异。等温 TTEG 配置可显着提高设备效率。总体而言，这项工作强调了 TTEG 的设计与传统 TEG 的设计有何不同，以及控制设备几何形状以实现最佳废热回收的重要性。
Transverse thermoelectric generators (TTEGs) have the potential to overcome two challenging problems that limit the commercial application of classical thermoelectric generators (TEGs): the significant irreversible efficiency losses in the contacts and the thermal degradation of the contacts at the hot end. TTEGs are built from a single material that can generate a thermoelectric current in a direction that is orthogonal to a temperature gradient. They only require a single set of contacts that are displaced away from the hot end. Here, we experimentally explore the device design considerations for optimizing the performance of this far less explored class of thermal-to-electric generation devices. We fabricate Re4Si7 TTEGs and show that there is no measurable loss in efficiency with a single set of contacts that are midway between the hot and cold ends. We show that a new effect must be considered: the appearance of transverse thermal gradients that lead to significant differences between the performance of TTEGs implemented in isothermal and adiabatic geometries. The isothermal TTEG configuration leads to much higher device efficiencies. Overall, this work highlights how different the design of TTEGs is from that of conventional TEGs and the importance of controlling the device geometry for optimum waste heat recovery.
计算引导发现 NaSnAs 晶体中轴相关的传导极性
影响因子：
8.6
作者：
Ochs, Andrew M.;Gorai, Prashun;Wang, Yaxian;Scudder, Michael R.;Koster, Karl;Moore, Curtis E.;Stevanovic, Vladan;Heremans, Joseph P.;Windl, Wolfgang;Toberer, Eric S.
通讯作者：
Toberer, Eric S.