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《Chemical Industry and Engineering Progress》 2017-06
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A study on the heat probe to measure effective thermal conductivity of micro-particle packed bed

ZHANG Xinyi;ZHENG Yihua;FENG Shouling;School of Mechanical and Electrical Engineering,Qingdao University;  
For exploring the complex phenomena of heat and mass transfer in the micro-particle packed bed,the device to measure thermal conductivity was designed and built. The experiments showed that the error is less than 2.97% after calibrated by the probe factor,and reproducibility is good. Effects of particles diameters,porosity,velocity of flow and changes in reaction on the thermal conductivity of micro-particles were investigated experimentally by thermal probe method. The results indicated that the effective thermal conductivity in dry declined with the size of particles and porosity increase. The effective thermal conductivity in low velocity fluid(0.8mL/min,1.6mL/min,3.2mL/min) is converse. The thermal conductivity of the resin particles after the ion exchange with the conditions of dry and low velocity fluid has not changed much. The chemical reaction and interrelated processing has no significant influence on the thermal conductivity of particles by comparing with exchange of the ions of particles. The thermal conductivities of the soil from different areas in different ions further verify the above conclusions. It is a reliable and effective on-line method to measure the effective thermal conductivity of the micro-particle packed bed by thermal probe method.
【Fund】: 山东省自然科学基金(ZR2014EEM004);; 山东省重点研发计划(2015GSF117019)项目
【CateGory Index】: O353.5
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