作　　者： ; ; ;

机构地区： 华南农业大学工程学院

出　　处： 《农业机械学报》 2003年第4期76-78,共3页

摘　　要： 采用非稳态热流法测定不同含水率稻谷的热导率和热扩散系数 ,进而求出比热容。研究了稻谷热特性参数与含水率的关系 ,结果表明 ,热导率、热扩散系数和比热容与稻谷含水率呈良好的线性关系。 Thermal properties of rough rice were measured by the transient heat flow method using a probe that approximately as a line heat source at different moisture contents. Using the relation of probe temperature versus elapsed time, the effective thermal conductivity and effective thermal diffusivity of rough rice were determined by an approximate solution of the equation for heat conduction corrected for probe finite diameter. In addition, using these values and bulk density, the specific heat of rough rice was estimated. The effects of moisture content on these thermal properties were discussed. It was found that the thermal conductivity, thermal diffusivity and specific heat were linear functions of the moisture content.

关 键 词： 稻谷 热特性参数 试验测定 含水率 热导率 热扩散系数 比热容

领　　域： [农业科学] [农业科学]