MEASUREMENT OF HEAT-TRANSFER COEFFICIENTS IN ROTATING LIQUID/PARTICULATE SYSTEMS

被引：31
|
作者：
STOFOROS, NG
MERSON, RL
机构：
[1] Department of Food Science and Technology and Department of Agricultural Engineering, University of California, Davis, California
[2] National Food Processors Association, Dublin, California, 94568
来源：
BIOTECHNOLOGY PROGRESS | 1991年 / 7卷 / 03期
关键词：
D O I：
10.1021/bp00009a600
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
A new method, involving the use of liquid crystals as temperature sensors, was developed to measure surface temperatures on moving particles. The method involves coating the monitored particles with aqueous solutions of encapsulated liquid crystals and recording the color changes on the particle surface as a function of temperature. Experimentally measured particle surface and liquid temperatures were used to calculate heat transfer coefficients for water-heated, axially rotating, cylindrical acrylic vessels containing liquid and solid spherical particles. The theoretical analysis associated with calculating the heat transfer coefficients from the experimental data is presented. The method is illustrated by measuring overall (heating medium/container wall/internal liquid) and liquid-particle film heat transfer coefficients for Teflon spheres in deionized water and aluminum spheres in 1.5 cSt silicone fluid.
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页码：267 / 271
页数：5
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