真空制冰过程中水滴动态特性  

Analysis on droplet temperature in binary ice preparation by vacuum method

作　　者：章学来[1] 李晓菲[1] 高文忠[1] 王为[1] 李志伟[1] 

机构地区：[1]上海海事大学蓄冷技术研究所,上海200135

出　　处：《化工学报》2012年第5期1373-1378,共6页CIESC Journal

基　　金：国家自然科学基金项目(50976064)

摘　　要：为研究真空制冰水滴温度影响因素并进行分析,搭建了真空制冰动态特性研究实验台,进行相关实验,采集了相关图像和实验数据。对采集的图像进行了定性分析。采集的实验数据主要是在不同环境温度、环境压力、供水水温、水质、粒径及水滴下落初速度等情况下水滴温度随时间的变化情况,并与模拟计算值一并进行了对比分析。分析得出环境温度、供水水温、下落初速度对其影响较小,而环境压力、水滴粒径对其影响较为明显,供水水质对其影响比较特殊,主要表现在液滴的最大过冷度上。The binary ice is a solid-liquid two-phase solution with huge minute ice crystals.The binary ice,with good flowing ability and large phase change latent heat,can be used as a good coolant for cold storage or large-scale and high-density cold energy transfer.In order to investigate the factors affecting the droplet temperature in binary ice preparation by vacuum method,a vacuum ice experimental bench,was set up to examine the dynamic characteristics of process,and collect relevant images and experimental data.The collected images are analyzed qualitatively.Experimental data collected are droplet temperature as a function of time at different environment temperatures,ambient pressures,water temperatures,water quality,sizes and initial falling velocities of water droplets which are compared with simulation data.The results show that the effects of environment temperature,water temperature,initial falling velocity of water droplets are small,while the effects of ambient pressure and water size are significant.The effect of water quality is special,mainly on the maximum subcooled degree of droplets.

关 键 词：二元冰 真空 水滴温度 

分 类 号：TB637.2[一般工业技术—制冷工程] TK124[动力工程及工程热物理—工程热物理]