非均匀热通量对热电器件性能的影响

doi:10.11949/j.issn.0438-1157.20151409

化工学报 ›› 2016, Vol. 67 ›› Issue (5): 1798-1805.DOI: 10.11949/j.issn.0438-1157.20151409

非均匀热通量对热电器件性能的影响

明廷臻¹, 潘滔^2,3, 王乾坤¹, 周军莉¹, 杨威², 龚廷睿²

1 武汉理工大学土木工程与建筑学院, 湖北武汉 430070;
2 华中科技大学能源与动力工程学院, 湖北武汉 430074;
3 上汽通用汽车有限公司武汉分公司产品工程部, 湖北武汉 430200

收稿日期:2015-09-06 修回日期:2016-01-11 出版日期:2016-05-05 发布日期:2016-05-05
通讯作者: 明廷臻
基金资助:
武汉地铁集团有限公司资助项目(WHRT-KY-201016);武汉理工大学科研启动基金项目(40120237);中央高校基本科研业务费专项资金资助(2016IVA029);国家自然科学基金项目(51106060)。

Influence of non-uniform heat flux on performance of thermoelectric device

MING Tingzhen¹, PAN Tao^2,3, WANG Qiankun¹, ZHOU Junli¹, YANG Wei², GONG Tingrui²

1 School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China;
2 School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China;
3 Product Engineering Department, Wuhan Branch of SAIC-GM Ltd., Wuhan 430200, Hubei, China

Received:2015-09-06 Revised:2016-01-11 Online:2016-05-05 Published:2016-05-05
Supported by:
supported by the Wuhan Metro Group Co., Ltd. Foundation (WHRT-KY-201016), the Scientific Research Foundation of Wuhan University of Technology (40120237), the Fundamental Research Funds for the Central Universities (2016IVA029) and the National Natural Science Foundation of China (51106060).

摘要/Abstract

摘要：

提高冷热两端温度是提高热电器件发电效率的有效途径之一。但当施加于热端表面的热通量不均匀时,热端表面温度不均匀,系统性能受到影响。基于此,建立了热电器件的热电转换耦合数学模型,分析热电材料物性参数,非均匀热通量等参数对热电器件的功率输出特性的影响。数值模拟结果表明:材料物性参数随温度的变化对系统输出功率的影响不可忽略,热通量4 W·cm^-2时物性参数对系统最高温度的影响接近4%;非均匀热通量对热电器件输出特性影响也十分显著,热通量均匀度越小,热端表面温度分布不均匀性越大,极值温度越高,高温区越小,断路电压越低。

关键词: 太阳能热电发电器, 热通量, 热传导, 均匀度, 数值模拟

Abstract:

An effective approach to increase the output power efficiency of thermoelectric devices is to increase the temperature difference between the hot and cold ends of thermoelectric devices. However, when the heat flux being imposed upon the hot end is non-uniform, the temperature distribution on the hot surface is uneven, which will influence the overall performance of the device. Based on this, a conjugate thermal to electric energy conversion mathematical model of thermoelectric devices was established to analyze the influences of thermoelectric material properties, non-uniform heat flux on the output power performance of thermoelectric device. Numerical simulation results indicated that the influence of temperature dependent material properties on the system output power cannot be neglected and the influence on the system maximum temperature difference will approach 4% when heat flux is about 4 W·cm^-2. The non-uniform heat flux has significant influence on the output power of thermoelectric device. The less the uniformity of heat flux upon the hot end of thermoelectric device, the more uneven of temperature distribution on the hot end, the maximum temperature, the high temperature region and the open-circuit voltage will be.

Key words: solar thermoelectric power generator, heat flux, heat conduction, uniformity, numerical simulation

中图分类号:

TM913

明廷臻, 潘滔, 王乾坤, 周军莉, 杨威, 龚廷睿. 非均匀热通量对热电器件性能的影响[J]. 化工学报, 2016, 67(5): 1798-1805.

MING Tingzhen, PAN Tao, WANG Qiankun, ZHOU Junli, YANG Wei, GONG Tingrui. Influence of non-uniform heat flux on performance of thermoelectric device[J]. CIESC Journal, 2016, 67(5): 1798-1805.

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非均匀热通量对热电器件性能的影响

Influence of non-uniform heat flux on performance of thermoelectric device

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