均匀多孔介质下乙醇溶液的过冷度-化工学报.PDF

第67 卷 第12 期 化 工 学 报 Vol.67 No.12 December 2016 2016 年12 月 CIESC Journal ·4976 · DOI ：10.11949/j.issn.0438-1157 均匀多孔介质下乙醇溶液的过冷度 章学来，李跃，王友利 （上海海事大学蓄冷技术研究所，上海 201306 ） 摘要：为了研究多孔介质对乙醇溶液过冷度的影响，实验搭建了不同孔隙率和不同热导率的多孔介质的实验系统， 通过改变乙醇溶液浓度探究了浓度对过冷度的影响，通过改变孔隙率和热导率探究强化换热方法。数据的处理采 用统计学的方法，每种工况下实验32 次。结果表明：多孔介质的孔隙率和热导率对乙醇溶液过冷度有影响；随着 孔隙率的减小和热导率的增加，平均过冷度值减小，过冷度稳定性增强；高浓度对减小过冷度作用明显，浓度越 高，过冷度平均值和最大值越小，而浓度的变化对稳定性影响较小。 关键词：过冷度；多孔介质；乙醇溶液；孔隙率；浓度 中图分类号：TK 02 文献标志码：A 文章编号：0438—1157 （2016 ）12—4976—07 Supercooling degree of ethanol solution under action of porous media ZHANG Xuelai, LI Yue, WANG Youli (Institute of Cool Thermal Storage Technology, Shanghai Maritime University, Shanghai 201306, China) Abstract: In order to study the effects of porous media on supercooling degree of ethanol solution, the experimental system of porous media with different porosities and thermal conductivities was built. The effect of ethanol concentration on the supercooling degree was investigated by changing the ethanol concentration. The method of heat transfer enhancement was explored by changing the porosity and thermal conductivity of porous media. The data were processed by statistical method and the experiment at each condition was repeated 32 times. The experimental results showed that the porosity and thermal conductivity of porous media had effects on the supercooling degree of ethanol solu