温差发电器的传热特性分析与实验研究

华南理工大学学报(自然科学版) ›› 2011, Vol. 39 ›› Issue (11): 47-52.

温差发电器的传热特性分析与实验研究

周泽广朱冬生^† 吴红霞张鸿声

华南理工大学传热强化与过程节能教育部重点实验室，广东广州 510640

收稿日期:2011-04-29 修回日期:2011-07-05 出版日期:2011-11-25 发布日期:2011-10-03
通信作者: 朱冬生(1964-) ，男，博士，教授，主要从事纳米能源与节能新技术研究． E-mail: cedshzhu@ scut．edu．cn E-mail:zegzh@163.com
作者简介:周泽广(1976-) ，男，博士生，主要从事半导体温差发电技术的开发与研究．
基金资助:
广东省重大科技专项( 2008A080302002， 2010A080405003) ; 粤港关键领域重点突破项目( 2009Z015)

Heat Transfer Characteristic Analysis and Experimental Investigation of Thermoelectric Generator

Zhou Ze-guang Zhu Dong-sheng Wu Hong-xia Zhang Hong-sheng

Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education,South China University of Technology,Guangzhou 510640,Guangdong,China

Received:2011-04-29 Revised:2011-07-05 Online:2011-11-25 Published:2011-10-03
Contact: 朱冬生(1964-) ，男，博士，教授，主要从事纳米能源与节能新技术研究． E-mail: cedshzhu@ scut．edu．cn E-mail:zegzh@163.com
About author:周泽广(1976-) ，男，博士生，主要从事半导体温差发电技术的开发与研究．
Supported by:
广东省重大科技专项( 2008A080302002， 2010A080405003) ; 粤港关键领域重点突破项目( 2009Z015)

摘要/Abstract

摘要： 采用热网络分析法分析了温差发电器冷端采用空气自然对流、强制对流以及水冷等3 种不同散热方式时的传热特性，并进行了实验研究．结果表明: 与空气自然对流相比，空气强制对流和水冷散热方式强化了散热器翅片与环境之间的传热，降低了发电器冷端的温度和热阻，发电器中的主要热阻由自然对流时的散热器翅片与环境间的对流换热热阻变为温差电组件与热源和冷端散热器之间的接触热阻; 当热源提供的热流量恒定时，强化发电器冷端传热的同时也降低了热源和发电器热端的温度，发电器热冷两端的温差并无显著提高; 当热源热流量较低时，强化冷端的传热并不能显著提高发电器的输出功率; 当热源热流量较大时，强化冷端的传热将大大提高发电器的输出功率; 热源热流量为50W 时，强制风冷和水冷方式下的输出功率比自然对流方式下的分别提高了27. 9%
和39. 5%．

关键词: 温差发电, 传热特性, 热网络, 输出功率, 散热方式

Abstract:

The heat transfer characteristics of the thermoelectric generator using air natural convection,air forced convection and water cooling on the cold side were analyzed based on the thermal network analysis,and the corresponding experimental investigation was carried out. The results show that,as compared with the air natural convection,the air-forced convection and the water cooling modes enhance the heat transfer between the heat sink fins
and the ambient and reduce the temperature and thermal resistance on the cold side,and that the main thermal resistance changes from the convectional one between the heat sink fins and the ambient to the contact one between the generator as well as the heat source and the sink on the cold side. When the heat flux of the heat source keeps constant,strengthening the heat transfer on the cold side of the generator may decrease the temperatures of the heat source and the hot side,while the temperature difference between the hot and the cold sides of the generator has no significant improvement. When the heat flux of the heat source is low,strengthening the heat transfer on the cold side of the generator can not dramatically increase the output power of the generator. When the heat flux of heat source is high,strengthening the heat transfer on the cold side may greatly increase the output power of the generator. Moreover,at a heat flux of 50 W,the output power in air-forced convection cooling and water cooling respectively increase by 27. 9% and 39. 5%,as compared with that in air natural convection cooling.

Key words: thermoelectric power generation, heat transfer characteristic, thermal network, output power, heat dissipation mode

中图分类号:

TK513

周泽广朱冬生吴红霞张鸿声. 温差发电器的传热特性分析与实验研究[J]. 华南理工大学学报(自然科学版), 2011, 39(11): 47-52.

Zhou Ze-guang Zhu Dong-sheng Wu Hong-xia Zhang Hong-sheng. Heat Transfer Characteristic Analysis and Experimental Investigation of Thermoelectric Generator[J]. Journal of South China University of Technology(Natural Science Edition), 2011, 39(11): 47-52.

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