温差驱动型自反馈对流换热系统

doi:10.3969/j.issn.0438-1157.2013.06.006

化工学报 ›› 2013, Vol. 64 ›› Issue (6): 1934-1938.DOI: 10.3969/j.issn.0438-1157.2013.06.006

温差驱动型自反馈对流换热系统

魏巍, 陈群, 任建勋

清华大学工程力学系, 传热与能源利用北京市重点实验室,热科学与动力工程教育部重点实验室,北京 100084

收稿日期:2012-09-27 修回日期:2012-12-03 出版日期:2013-06-05 发布日期:2013-06-05
通讯作者: 陈群
作者简介:魏巍(1987—),女,硕士。
基金资助:
国家自然科学基金项目(51036003,51006060)。

Temperature difference driven self-feedback convective heat transfer system and its performance

WEI Wei, CHEN Qun, REN Jianxun

Department of Engineering Mechanics, Key Laboratory of Heat Transfer and Energy Conversion of Beijing, Key Laboratory of Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China

Received:2012-09-27 Revised:2012-12-03 Online:2013-06-05 Published:2013-06-05
Supported by:
supported by the National Natural Science Foundation of China(51036003,51006060).

摘要/Abstract

摘要： 在流体导热系统的基础上,引入热功转换子系统,构造了一种温差驱动型自反馈对流换热系统。它可以在无外界机械能输入的情况下,利用换热过程中的温差将部分热能转换为机械能驱动流体流动,达到强化换热的目的。通过最小火积耗散热阻原理优化了流体的对流换热过程,获得了给定条件下对流换热性能最优的速度场和温度场。结果表明:对于本文算例,自反馈系统的换热性能可达同边界条件下的纯导热系统的10倍,自然对流换热系统的8.4倍,验证了温差驱动型自反馈对流换热系统可以实现强化传热的设想。

关键词: 对流换热, 温差驱动, 自反馈, 强化

Abstract: This paper presents a temperature difference driven self-feedback heat convective system with an additional thermal power conversion subsystem based on a traditional heat conduction system.This self-feedback system converts a portion of thermal energy into mechanical energy to make fluid flow in the system.Numerical simulation of the flow and heat transfer performance of the system shows that the heat transfer coefficient of the self-feedback system is 10 times as much as that of heat conduction system and 8.4 times that of natural convection system.Thus the self-feedback system can enhance heat transfer without external mechanical energy input.

Key words: convection heat transfer, temperature difference driven, self-feedback, enhancementd

中图分类号:

TK124

魏巍, 陈群, 任建勋. 温差驱动型自反馈对流换热系统[J]. 化工学报, 2013, 64(6): 1934-1938.

WEI Wei, CHEN Qun, REN Jianxun. Temperature difference driven self-feedback convective heat transfer system and its performance[J]. CIESC Journal, 2013, 64(6): 1934-1938.

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温差驱动型自反馈对流换热系统

Temperature difference driven self-feedback convective heat transfer system and its performance

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