Study of different heat exchange technologies influence on the performance of thermoelectric generators
Study of different heat exchange technologies influence on the performance of thermoelectric generators
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DOI：
10.1016/j.enconman.2017.11.011
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发表时间：
2018-01
影响因子：
10.4
通讯作者：
Song Lv;Wei He;Q. Jiang;Zhongting Hu;Xianghua Liu;Hongbing Chen;Minghou Liu
中科院分区：
文献类型：
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作者：
Song Lv;Wei He;Q. Jiang;Zhongting Hu;Xianghua Liu;Hongbing Chen;Minghou Liu
热电转换中的一个关键挑战是在热电发电机（TEG）上产生显著的温差（Δ T）。而产生更大温差的一种方法是增强TEG热侧的传热。因此，当设计和制造热电发电机时，发现热电装置的热交换器决定其性能。分析了热电装置中三种典型换热器的优缺点，并考虑了提高热电性能所需的辅助设备的功率消耗。为此，建立了一个数学模型。该模型的准确性通过实验验证，通过构建和测试原型。计算结果表明，三种不同类型的热交换器的热电装置的净功率输出性能。空气冷却交换器显示出最小的辅助消耗，而热管冷却交换器显示出最有效的。最后，本文进行了经济性分析，并提出了一个新的评价指标与辅助设备的功耗。研究结果对实际温差发电系统的设计和应用具有一定的指导意义。
A key challenge in thermoelectric power conversion is to create a significant temperature difference (Δ T) across the thermoelectric generator (TEG). And one approach to create a larger temperature difference is to enhance heat transfer of the hot side of TEG. Thus, when a thermoelectric generator has been designed and manufactured, it is found that the heat exchangers of the thermoelectric device determines its performance. This paper investigated the differences as well as the advantages and disadvantages of three typical heat exchangers in a thermoelectric setup, and the power consumed by the auxiliary equipment to improve the thermoelectric performance were taken into account. For this purpose, a mathematical model has been developed. The accuracy of this model was verified via the experiments, by constructing and testing the prototypes. The results illustrate the net power output performance of thermoelectric devices with three different type of heat exchangers. The air cooling exchangers are shown a minimum auxiliary consumption whereas the heat pipe cooling exchanger are shown to be the most effective. At last, this article gets an economic analysis, and a new evaluation index associated with the power consumption of the auxiliary equipment is proposed. The results provided some practical guidelines for the design and application of practical thermoelectric power generations.