基于响应曲面法的松散煤体导热系数测试与分析  

Test and analysis of thermal conductivity of loose coal based on response surface method

作　　者：周西华[1,2,3] 童谣 宋东平[1,2,3] 白刚[1,2,3] 李昂[1,2,3] ZHOU Xihua;TONG Yao;SONG Dongping;BAI Gang;LI Ang(College of Safety Science and Engineering,Liaoning Technical University,Fuxin Liaoning 123000, China;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Fuxin Liaoning 123000,China;Research Center of Coal Resources Safe Mining and Clean Utilization,Liaoning Technical University,Fuxin Liaoning 123000,China)

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]矿山热动力灾害与防治教育部重点实验室,辽宁阜新123000 [3]辽宁工程技术大学煤炭资源安全开采与洁净利用工程研究中心,辽宁阜新123000

出　　处：《中国安全科学学报》2018年第10期105-110,共6页China Safety Science Journal

基　　金：国家自然科学基金资助(51274115)

摘　　要：为研究松散煤体导热系数随其影响因素的变化规律,基于平行热线法和交叉热线法,通过自制的试验装置测得不同粒径、温度和含水率下松散煤体的导热系数,并拟合导热系数与温度、含水率的变化曲线;引入二次响应曲面法,对粒径、温度和含水率做Box-Behnken试验设计,得出影响因素的重要度排序。结果表明:借助试验装置进行试验,能够准确测算松散煤体导热系数,测量误差在3.0%以内,并能同时得到热扩散率与比热容;松散煤体导热系数随粒径的增大而减小,随温度的升高而降低,随含水率的增大而增大;三因素对导热系数一次项重要度排序为含水率 >粒径 >温度,二次项重要度排序为粒径和温度 >粒径和含水率 >含水率和温度,且粒径和温度间存在交互作用,其余无交互作用。To explore the variation law of thermal conductivity of loose coal with its influencing factors, based on parallel hot line method and cross hot line method,thermal conductivity values of loose coal samples with different particle sizes,temperature and water content were measured by using a self-made test device.Curves of thermal conductivity with temperature and water content were fitted.By introducing the secondary response surface method,a Box-Behnken test design was made for the particle size, temperature and water content to obtain to list them in order of importance.The results show that the test device can be used to accurately measure the thermal conductivity of loose coal with a measurement error within 3.0%,and the thermal diffusivity and specific heat capacity can be obtained at the same time,that the thermal conductivity of loose coal decreases with the increase of particle size,decreases with the increase of temperature,and increases with the increase of water content,that for the importance to thefirst-order term of the thermal conductivity formula,there is an order of water content >particle size > temperature,and for the importance to the second-order term of the formula,there is two orders of particle size and temperature >particle size and water content >water eontent and temperature,and that there is interaction between particle size and temperature merely.

关 键 词：松散煤体 响应曲面法 导热系数 粒径 温度 含水率 

分 类 号：X936[环境科学与工程—安全科学]