接触热阻对相变耦合温差发电系统的影响
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引用本文:石峰,刘安邦,吴子华,谢华清,王元元,邹佳朴,封芬.接触热阻对相变耦合温差发电系统的影响[J].上海第二工业大学(中文版),2020,(4):270-278
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作者单位
石峰 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
刘安邦 2. 南京理工大学能源与动力工程学院, 南京210094 
吴子华 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
谢华清 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
王元元 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
邹佳朴 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
封芬 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
基金项目:国家自然科学基金项目(51590902, 51676117, 51876111), 国家自然科学基金青年基金(51702210) 上海市曙光计划 (18SG54) 资助
中文摘要:在汽车尾气温差发电系统中, 热量在传递的过程中通常要经过若干个接触界面。而界面间的接触热阻影响 着热量的传递效率和热电器件冷热两侧的实际温差, 进而影响到系统的发电性能。利用工业热风机模拟汽车运行实 际工况, 使用装载有相变材料(phase change material, PCM) 的温差发电系统, 通过涂抹不同导热系数的导热硅脂来 调节热电器件与系统间的接触热阻, 研究了接触热阻对PCM 以及系统输出电压的影响。研究发现, 同时减小热电 器件两侧与系统间的接触热阻会削弱PCM 的储热能力; 相较于减小热电器件热面与系统间的接触热阻, 减小热电 器件冷面与冷端换热器间接触热阻, 对温差发电系统输出电压的提升效果更为显著。
中文关键词:热电发电系统  接触热阻  相变材料  汽车尾气
 
Effect of Thermal Contact Resistance on the Performance of ThermoelectricGeneration System with Phase Change Material
Abstract:Carbon nanotubes (CNTs) have excellent electrical conductivity, thermal conductivity and high thermal stability. Metal nanoparticles (M-NPs) with unique catalytic properties, electrical and thermal conductivity are loaded on the surface of CNTs to form a composite material, which can be widely used in the field of catalysis and thermal management. The research status of the preparation of CNTs loaded with M-NPs at home and abroad are summarized, including covalent and non-covalent functionalization of CNTs, the loading of M-NPs, and direct chemical vapor deposition, physical deposition, and electrochemistry deposition methods to load M-NPs onto CNTs. Although covalently functionalized CNTs can permanently and steadily connect other molecules on the surface of CNTs, the hybridization process of sp2 to sp3 leads to the reorganization of the electronic structure, changing the original electronic delocalization of CNTs and destroying the thermal properties of CNTs, optical and other intrinsic characteristics, so non-covalent modification methods can be used, which can not only maintain the original structure and performance of CNTs, but also will not destroy the -conjugated system. The green and simple method of directly loading M-NPs onto the surface of CNTs can be prepared on a large scale by the hybrid heating method, without the need to add other solvents or any precision instruments, so that the M-NPs can be uniformly dense and efficient loaded onto the surface of CNTs to produce composite materials. It can be seen that the application prospect of greener and more efficient metal nanoparticle modified CNTs composite materials in the fields of energy, environment and thermal management is getting brighter.
keywords:thermoelectric power generation system  thermal contact resistance  phase change materials  automobile exhaust
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