松散煤体导热系数测量及影响因素分析研究

Study on Measurement of Thermal Conductivity of Loose Coal and Analysis of Influencing Factors

导热系数是物体本身的属性,在研究物体传热方面发挥着重要作用。为了得到特定煤种的导热系数及其影响因素,通过建立导热系数测量系统,并搭建相关的试验模型,使用热线法测量松散煤体导热系数,对导热系数测量结果进行了分析,并对导热系数的影响因素具体分析。结果表明:条件不同的松散煤体导热系数各不相同,导热系数随温度、含水量的升高而增大,随粒径、孔隙率以及热值的升高而减小。

Thermal conductivity is an attribute of the object itself and plays an important role in studying the heat transfer of objects.In order to obtain the thermal conductivity of specific coal types and its influencing factors,the thermal conductivity measurement system was established and the relevant experimental model was built.The thermal conductivity of the loose coal was measured by the hot wire method.The thermal conductivity measurement results were analyzed and the thermal conductivity was analyzed.The specific analysis of the influencing factors.The results show that the thermal conductivity of loose coal with different conditions is different,and the thermal conductivity increases with the increase of temperature and water content,and decreases with the increase of particle size,porosity and calorific value.