自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
英文版编委
自然科学版 英文版
英文版首届青年编委

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第52卷    第1期    总第317期    2021年1月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2021)01-0276-09
基于相变线源解的固液热导率测量方法及其影响因素分析
周天,袁杰,马爱纯

(中南大学 能源科学与工程学院,湖南 长沙,410083)

摘 要: 基于相变线源解提出一种同时估算相变材料(PCMs)固液两相热导率的参数估计方法,该方法通过记录相变区域中某一监测点液相温度-时间曲线拟合得到相变材料的固液两相热导率。首先利用灵敏度分析讨论该方法的可行性,随后采用数值模拟的方法研究热线半径、测点位置、加热功率、试样半径对固液两相热导率估算结果的影响规律。研究结果表明:液相热导率具有较高的灵敏度,其估算结果精度较高,并随着相变时间逐渐增加;而固相热导率的灵敏度较低,其估算结果更易受到各类因素引起的温升变化影响。

 

关键词: 相变材料;热导率;灵敏度分析;数值模拟

A method for estimating solid- and liquid- phase thermal conductivities based on phase-change line-source solution and analysis of influencing factors
ZHOU Tian, YUAN Jie, MA Aichun

School of Energy Science and Engineering, Central South University, Changsha 410083, China

Abstract:A parameter estimation method for simultaneously estimating solid- and liquid- thermal conductivities of phase change materials(PCMs) was proposed based on the phase-change line-source solution. In this method, the thermal conductivities were obtained by measuring the liquid temperature curve at a monitoring point. The sensitivity analysis was carried out based on this method, and the effects of hot-wire radius, monitoring point position, heating power and sample radius on the result of thermal conductivities were observed and studied numerically, and the related rules were analyzed. The results show that because of the high sensitivity, the estimation accuracy of liquid phase thermal conductivity is higher, and increases gradually with the increase of the time. While the sensitivity of solid phase thermal conductivity is lower, its accuracy is easily affected by the trend of temperature rise caused by various factors.

 

Key words: phase-change material; thermal conductivity; sensitivity analysis; numerical simulation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号