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首页> 外文期刊>Energy Conversion & Management >High efficiency segmented thermoelectric unicouple for operation between 973 and 300 K
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High efficiency segmented thermoelectric unicouple for operation between 973 and 300 K

机译：适用于973至300 K的高效分段热电单联

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摘要

High efficiency segmented thermoelectric unicouples (STUs) made of n-type Bi_2Te_3 and CoSb_3 based alloys and p-type Bi_2Te_3 and CeFe_4Sb_(12) based alloys have recently been developed at the Jet Propulsion Laboratory (JPL). A 1-D analytical model of STUs, which assumes zero side heat losses, is developed and its predictions are compared with some results of experiments performed at JPL to measure the performance parameters of two STUs, uni8 and uni12. Calculations of the effects of contact resistance and side heat losses on the performance of these STUs are presented and discussed. The results indicate that had uni8 and uni12 been well insulated and the contact resistance per leg ～50μΩcm~2, they could have achieved a conversion efficiency of ～12%, in the tests performed at T_c = 305-316 K and T_h = 872-885 K. However, the actual contact resistances of ～146 and 690μΩcm~2 per leg and the side heat losses of 3.7 and 1.83 W, for uni8 and uni12, respectively, limited the peak conversion efficiency in the tests to ～5.5% and 4.6%, respectively. Calculations indicated that STUs having a total contact resistance ～50μΩcm~2 per leg and being well insulated on the sides could potentially achieve a peak conversion efficiency of 15% when operated between 973 and 300 K.
机译：最近在喷气推进实验室（JPL）开发了由n型Bi_2Te_3和CoSb_3基合金以及p型Bi_2Te_3和CeFe_4Sb_（12）基合金制成的高效分段式热电单电偶（STU）。建立了假设零侧热量损失的STU的一维分析模型，并将其预测结果与JPL进行的一些实验结果进行了比较，以测量两个STU（uni8和uni12）的性能参数。提出并讨论了接触电阻和侧热损失对这些STU性能的影响的计算。结果表明，在T_c = 305-316 K和T_h = 872-T下进行的测试中，如果uni8和uni12绝缘良好且每条腿的接触电阻约为50μΩcm〜2，则它们可以实现约12％的转换效率。 885K。但是，对于uni8和uni12，每条腿的实际接触电阻分别为〜146和690μΩcm〜2，侧面热量损失分别为3.7和1.83 W，这限制了测试中的峰值转换效率为〜5.5％和4.6 ％， 分别。计算表明，在973和300 K之间工作时，每条腿的总接触电阻约为50μΩcm〜2且两侧绝缘良好的STU可能会达到15％的峰值转换效率。

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  • 来源
    《Energy Conversion & Management》 |2003年第7期|p.1069-1088|共20页
  • 作者

    Mohamed S. El-Genk; Hamed H. Saber;

  • 作者单位

    Department of Chemical and Nuclear Engineering, Institute for Space and Nuclear Power Studies, The University of New Mexico, Farris Engineering Center Room 239, Albuquerque, NM 87131-1341, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 能源与动力工程;
  • 关键词

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