Analytical Optimization of the Design of Film-Laminated Thermoelectric Power Generators
Analytical Optimization of the Design of Film-Laminated Thermoelectric Power Generators
复制标题
薄膜层压热电发电机设计的分析优化
DOI：
--
复制
发表时间：
2019
影响因子：
2.1
通讯作者：
Y. Kasai
中科院分区：
文献类型：
--
作者：
Y. Koh;K. Yazawa;A. Shakouri;Takuma Nagahama;S. Maeda;Tadayuki Isaji;Y. Kasai
热电发电机直接将热量转换为电力，通常由块状固体热电材料制成。它们是一种广泛用于汽车废气热回收或空间卫星放射性同位素发电的技术。我们提出了一种薄膜层压器件结构，以实现更低的成本和更高的批量生产。薄膜叠层热电发电机设计包括各种薄膜材料和绝缘体聚合物薄膜。尽管制造工艺简单，但在膜层压器件结构中，跨越绝缘体膜的旁路热泄漏的挑战将增加。器件中的绝缘体薄膜表现出较低的热导率，但与热电材料相比不可忽略。对叠层薄膜温差发电器进行了综合分析。该研究包括几何设计和导热系数对功率输出的影响。研究了设计参数和材料性能的敏感性。估计来自可用热量的功率成本（$/W）。上述两者都受到外部热接触的有效传热系数的影响。对于给定的ZT值，确定作为层压材料与热电材料的导热率比的函数的归一化功率。该关系可用于测量层压材料对任何材料组合的影响。当导热系数比接近1时，输出功率单调减小。对于绝缘体，特别是对于薄热电层设计，非常期望使用低一个数量级的热导率。
Thermoelectric generators directly convert heat into electricity, typically made from bulk solid thermoelectric materials. They are a widely used technology in exhaust gas heat recovery from automotive vehicles or radioisotope power generation in space satellites. We propose a film-laminated device structure for lower cost and higher volume production. The film-laminated thermoelectric generator design includes a wide variety of thin-film materials and insulator polymer films. Despite the simple fabrication process, the challenges in the bypass heat leak across the insulator film would increase in a film-laminated device structure. The insulator films in the device exhibit low thermal conductivities but cannot be neglected compared to the thermoelectric materials. Comprehensive analysis is conducted on laminated film-based thermoelectric power generators. The study includes the impacts of the geometry design and thermal conductivity to the power output. The sensitivity of design parameters and material properties is investigated. Cost of the power ($/W) from the available heat is estimated. Both of the above are influenced by the effective heat transfer coefficient of the external thermal contacts. The normalized power as a function of the thermal conductivity ratio of the laminate to the thermoelectric materials is determined for a given ZT value. This relationship can be utilized to measure the impact of the laminating material for any material combination. The power output monotonical decreases as the thermal conductivity ratio gets closer to unity. It is highly desirable to use a one order of magnitude lower thermal conductivity for the insulator, especially for thin thermoelectric layer design.
影响因子：
13.1
作者：
Liming Wang;Yuchen Liu;Zimeng Zhang;Biran Wang;Jingjing Qiu;D. Hui;Shiren Wang
通讯作者：
Liming Wang;Yuchen Liu;Zimeng Zhang;Biran Wang;Jingjing Qiu;D. Hui;Shiren Wang