Behavior of thermoelectric generators exposed to transient heat sources
Behavior of thermoelectric generators exposed to transient heat sources
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DOI：
10.1016/j.applthermaleng.2012.08.050
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发表时间：
2013-03-01
影响因子：
6.4
通讯作者：
Pochiraju, Kishore V.
中科院分区：
文献类型：
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作者：
Nguyen, Nguyen Q.;Pochiraju, Kishore V.
本文描述了热侧瞬时热源和冷侧自然对流条件下热电机组的发电行为。这种模拟情况在能量收集应用中是典型的。与热电致冷器相比，在这些条件下对热电发电机(TEG)进行建模是复杂的，因为闭环系统中存在非线性和未知电流。用有限差分方法求解了一个包含Seebeck、Peltier、Thomson和Joule效应的热电暂态模型，并对TEG产生的功率进行了模拟。利用开路实验建立了控制热电耦合和热电行为的关键参数。通过闭路实验和负载电阻实验验证了模型的正确性。结果表明，计入汤姆逊效应对准确预测该器件的发电量有重要作用。(C)2012爱思唯尔有限公司。保留所有权利。
This paper describes the power generation behavior of a thermoelectric generator (TEG) exposed to a transient heat source on the hot side and natural convection on the cold side. The simulation situation is typical in energy harvesting applications. Modeling thermoelectric generators (TEGs) under these conditions is complicated compared to thermoelectric coolers because of the non-linearities and the unknown electric currents in a closed-loop circuit. A transient thermoelectric model that includes Seebeck, Peltier, Thomson, and Joule effects is solved using finite-difference techniques and the power generated from a TEG is simulated. Using open-circuit experiments were used to establish key parameters governing the thermal behavior and thermoelectric coupling. Experiments with closed-circuits and load resistors were used to validate the model. The results show that inclusion of Thomson effect plays a significant role in accurately predicting the power generated by the device. (c) 2012 Elsevier Ltd. All rights reserved.