Ice Slurry Formation in a Cocurrent Liquid-Liquid Flow

›› 2008, Vol. 16 ›› Issue (4): 552-557.

• TRANSPORT PHENOMENA & FLUID MECHANICS • Previous Articles Next Articles

Ice Slurry Formation in a Cocurrent Liquid-Liquid Flow

PENG Zhengbiao, YUAN Zhulin, LIANG Kunfeng, CAI Jie

School of Energy and Environment, Southeast University, Nanjing 210096, China

Received:2007-09-24 Revised:2008-01-17 Online:2008-08-28 Published:2008-08-28
Supported by:
the Specialized Research Fund for the Doctoral Program of Higher Education of China(20060286034)

Ice Slurry Formation in a Cocurrent Liquid-Liquid Flow

彭正标, 袁竹林, 梁坤峰, 蔡杰

School of Energy and Environment, Southeast University, Nanjing 210096, China

通讯作者: YUAN Zhulin, E-mail: zlyuan@seu.edu.cn
基金资助:
the Specialized Research Fund for the Doctoral Program of Higher Education of China(20060286034)

Abstract

Abstract: A new technique for ice slurry production was explored. Multiple small water-drops were formed in another immiscible chilled liquid by a single-nozzled atomizer and frozen in the fluidized bed by direct contact heat transfer. Experiments were conducted to investigate the dynamic behaviors of the ice crystal making system. The results demonstrate that the ice crystals could be produced continuously and stably in the vertical bed with the circulating coolant of initial temperature below -5℃. The size distribution of the ice crystals appears non-uniform, but is more similar and more uniform at lower oil flow rate. The mean ice crystal size rests seriously with the jet velocity and the oil flow rate. It decreases with decreasing the oil flow rate, and reaches the maximum at an intermediate jet velocity at about 16.5 m·s^-1. The ice crystal size is also closely related to the phenomenon of drop-coalescing, which can be alleviated considerably by reducing the flow rate or lowering the temperature of the carrier oil. However, optimization of liquid-liquid atomization is a more effective approach to produce fine ice crystals of desired size.

Key words: ice slurry, drop-coalescing, ice crystal size distribution, liquid-liquid atomization

摘要： A new technique for ice slurry production was explored. Multiple small water-drops were formed in another immiscible chilled liquid by a single-nozzled atomizer and frozen in the fluidized bed by direct contact heat transfer. Experiments were conducted to investigate the dynamic behaviors of the ice crystal making system. The results demonstrate that the ice crystals could be produced continuously and stably in the vertical bed with the circulating coolant of initial temperature below -5℃. The size distribution of the ice crystals appears non-uniform, but is more similar and more uniform at lower oil flow rate. The mean ice crystal size rests seriously with the jet velocity and the oil flow rate. It decreases with decreasing the oil flow rate, and reaches the maximum at an intermediate jet velocity at about 16.5 m·s^-1. The ice crystal size is also closely related to the phenomenon of drop-coalescing, which can be alleviated considerably by reducing the flow rate or lowering the temperature of the carrier oil. However, optimization of liquid-liquid atomization is a more effective approach to produce fine ice crystals of desired size.

关键词: ice slurry, drop-coalescing, ice crystal size distribution, liquid-liquid atomization

PENG Zhengbiao, YUAN Zhulin, LIANG Kunfeng, CAI Jie. Ice Slurry Formation in a Cocurrent Liquid-Liquid Flow[J]. , 2008, 16(4): 552-557.

彭正标, 袁竹林, 梁坤峰, 蔡杰. Ice Slurry Formation in a Cocurrent Liquid-Liquid Flow[J]. , 2008, 16(4): 552-557.

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Ice Slurry Formation in a Cocurrent Liquid-Liquid Flow

Ice Slurry Formation in a Cocurrent Liquid-Liquid Flow

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