Experimental investigation on the influence of phase change material on the output performance of thermoelectric generator

Experimental investigation on the influence of phase change material on the output performance of thermoelectric generator
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相变材料对温差发电器输出性能影响的实验研究

DOI:
10.1016/j.renene.2021.06.014
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发表时间:
2021-11
期刊:
影响因子:
8.7
通讯作者:
Meng Qingtian
Meng Qingtian
中科院分区:
工程技术1区
文献类型:
--
作者:
Wang Jun;Song Xiangxiang;Ni Qiqiang;Li Xingjun;Meng Qingtian

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热电发电机(teg)可以将热量直接转化为电能。然而,热边界条件是间歇性和高温的,在大多数TEG系统。因此,TEG系统的热管理具有重要意义。相变材料(PCM)是一种有效的热管理技术。本研究将相变材料应用于TEG热侧,建立相变材料-热电发电(PCM-TEG)系统。为了探讨PCM对TEG输出性能的影响,建立了普通TEG系统,并与PCM-TEG系统进行了比较。进一步研究了不同脉冲瞬态热边界条件下PCM的传热特性对TEG输出性能的影响。实验结果表明,PCM可以减小温度波动,保护TEG,延长温差操作时间。固态、固液共存态和液态的PCM对降低温度波动有不同的效果。此外,PCM-TEG系统不能提供普通TEG系统提供的峰值输出功率,但仍然有利于提供稳定的输出功率。
Thermoelectric generators (TEGs) can convert heat into electricity directly. However, the thermal boundary conditions are intermittent and high temperature in most TEG systems. Therefore, thermal management of TEG systems is of great significance. It is an efficient technology to use phase change material (PCM) for thermal management of the TEG systems. PCM is applied to hot side of TEG in this study, and the phase change material-thermoelectric generation (PCM-TEG) system is set up. For the purpose of exploring the effect of the PCM on the output performance of TEG, the common TEG system is established to compare with PCM-TEG system. Furthermore, the effect of the heat transfer characteristics of PCM on TEG output performance is investigated and discussed in detail under different pulse transient thermal boundary conditions. Experimental results show that PCM can reduce the temperature fluctuation to protect TEG and extend the temperature difference operation time. The PCM of solid state, solid-liquid coexistence state and liquid state have different effects on reducing the temperature fluctuation. Besides, the PCM-TEG system cannot provide the peak output power provided by the common TEG system, but it is still beneficial to provide a stable output power.
基于最大功率点和负载功率跟踪的热电发电机能量管理
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