电加热鞋帮二维瞬态传热模型及其实验验证  

Two⁃dimensional transient heat transfer model for electrically heated shoe upper and experimental validation

作　　者：刘广菊 苏云[1,2] 田苗[1,2] 李俊[1,2] LIU Guangju;SU Yun;TIAN Miao;LI Jun(College of Fashion and Design,Donghua University,Shanghai200051,China;Key Laboratory of Clothing Design and Technology,Ministry of Education,Donghua University,Shanghai200051,China)

机构地区：[1]东华大学服装与艺术设计学院,上海200051 [2]东华大学现代服装设计与技术教育部重点实验室,上海200051

出　　处：《纺织学报》2023年第10期127-133,共7页Journal of Textile Research

基　　金：国家自然科学基金项目(52004066);教育部人文社会科学研究青年基金项目(20YJC760087);中央高校基本科研业务费专项基金项目(2232022G-08);上海市教育发展基金会和上海市教育委员会“晨光计划”项目(20CG78)。

摘　　要：为研究电加热元件的调温机制及其对足部热舒适的影响,基于有限体积法建立了电加热鞋帮二维传热模型,考虑了多孔介质织物传热以及加热区与非加热区的二维传热特性。通过冷暴露环境下电加热鞋帮织物的调温性能测试,验证了电加热鞋帮二维传热模型,并与一维模型进行了对比分析。结果表明:二维模型对于皮肤温度的预测偏差控制在2.59%~13.74%之间,随着鞋帮织物保暖性的改善,能够更准确地预测皮肤温度的变化;相比一维模型,二维模型能够更加科学地模拟电加热元件的调温规律,加热片温度在初始升温阶段的预测偏差减小了2.99%~25.09%。电加热鞋帮二维传热模型可更加准确地表征其调温机制,对丰富电加热元件二维传热理论、指导电加热元件的参数化设计具有重要意义。Objective Local heating is an efficient way to improve thermal sensation and thermal comfort of foot.Currently,electrically heated products of footwear are available in the market.However,there are problems in terms of temperature control and parameters design such as heating temperature and power.Laboratory studies on personal electrically heated devices for foot are limited.The simulation of heated zones with distribution of heating elements in the numerical model is insufficient.The purpose of this study was to investigate the mechanism of temperature regulation by an electric heater and its influence on thermal comfort of foot.Method Based on finite volume method,a two⁃dimensional model for electrically heated upper of foot⁃wear(EHUF)was developed.Characteristics of heat transfer in porous fabrics and two⁃dimensional heat transfer between heated and unheated zones were considered.The space⁃step of X and Y were defined as 5×10^(-4) m and 5×10^(-5) m respectively,and the time⁃step is 3 s.The maximum residual error was set at 0.001℃.The model was validated by testing the thermal regulative performance of the electrically heated footwear with cold exposure,and further compared with a one⁃dimensional model proposed.Results The stable skin temperatures of two⁃dimensional model ranged from 34.57℃to 36.19℃(Fig.3),and the deviations of skin temperature between two⁃dimensional model and the experiment were controlled to be in the band of 2.59%and 13.74%(Tab.3).Under the premise of the same main parameter,both the one⁃dimension and two⁃dimensional models effectively predicted the skin temperature.It was found that the better the cold protective performance of fabrics,the smaller the difference between the one⁃dimension and two⁃dimensional model predictions.Specifically,when cold protective performance of fabrics matched the set temperature of the heating pad,the two⁃dimensional model under the mode of heating pad temperature control(HPTC)was better than the one⁃dimensional model.This

关 键 词：鞋帮 二维热传递 热舒适 加热片 有限体积法 

分 类 号：TS941.73[轻工技术与工程—服装设计与工程]