Droplet flash evaporation of mixed dehumidification solutions

doi:10.3969/j.issn.0438-1157.2012.11.011

CIESC Journal ›› 2012, Vol. 63 ›› Issue (11): 3453-3459.DOI: 10.3969/j.issn.0438-1157.2012.11.011

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Droplet flash evaporation of mixed dehumidification solutions

GAO Wenzhong¹, SHI Yaru¹, HAN Xiaosheng¹, ZHANG Xuelai¹, CHENG Yongpan²

1. Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China;
2. Department of Chemical and Biomolecular Engineering, National University of Singapore, 117576, Singapore

Received:2012-02-28 Revised:2012-07-27 Online:2012-11-05 Published:2012-11-05
Supported by:
supported by the National Natural Science Foundation of China(51106094).

混合除湿盐溶液液滴闪蒸机理

高文忠¹, 时亚茹¹, 韩笑生¹, 章学来¹, 程永攀²

1. 上海海事大学商船学院, 上海 201306;
2. 新加坡国立大学化学和生物分子工程系, 新加坡 117576

通讯作者: 章学来
作者简介:高文忠(1978-),男,博士,副教授。
基金资助:
国家自然科学基金项目(51106094)。

Abstract

Abstract: Regeneration of dehumidification solution is necessary to maintain the continuous dehumidifying process,whose efficiency directly affects the performance of whole system.The size,mass,and temperature of droplets during the flash evaporation were analyzed based on droplet flash theory,and the factors affecting the efficiency of flash evaporation were tested through preliminary experiments.The results show that pressure is the key factor affecting the efficiency of the flash evaporation.Flash evaporation may proceed only if the steam is removed timely.The mixed ratio of different solutions is relevant to the efficiency of flash evaporation.The initial temperature of droplet has little effect on the efficiency.The experimental values of temperature are higher than the theoretical values,so the physical properties need to be modified if the flash evaporation theory of droplet is adopted according to droplets flash evaporation of mixed dehumidification solutions.

Key words: flash evaporation, mixed dehumidification solutions, efficiency, concentration ratio

摘要： 除湿溶液再生是维持除湿过程持续进行的必备条件,其效率直接影响整个系统的性能。借鉴水滴闪蒸理论,分析了液滴闪蒸过程大小、质量以及温度变化,初步实验测试了影响闪蒸效率的因素,结果表明:压力是影响闪蒸效率的核心因素,及时去除蒸发水分才能保证闪蒸的持续进行;溶液浓度配比与闪蒸效率关联性较强;液滴初始温度对闪蒸效率影响相对较小;温度的实验测试值总体大于理论计算值,使用水滴闪蒸理论模型需进行物性修正。

关键词: 闪蒸, 混合溶液, 效率, 浓度配比

CLC Number:

TQ028.8

GAO Wenzhong, SHI Yaru, HAN Xiaosheng, ZHANG Xuelai, CHENG Yongpan. Droplet flash evaporation of mixed dehumidification solutions[J]. CIESC Journal, 2012, 63(11): 3453-3459.

高文忠, 时亚茹, 韩笑生, 章学来, 程永攀. 混合除湿盐溶液液滴闪蒸机理[J]. 化工学报, 2012, 63(11): 3453-3459.

References 16

[1]	Jiang Yi(江亿),Li Zhen(李震),Chen Xiaoyang(陈晓阳),Liu Xiaohua(刘晓华).Liquid desiccant air-conditioning system and its applications[J].Journal of HV&AC(暖通空调),2004,34(11):88-97
[2]	Longo G A,Gasparella A.Experimental analysis on chemical dehumidification of air by liquid desiccant and desiccant regeneration in a packed tower[J].Journal of Solar Energy Engineering,2004,126(1):587-591
[3]	Manuel R Conde.Properties of aqueous solutions of lithium and calcium chlorides:formulations for use in air conditioning equipment design[J].International Journal of Thermal Sciences,2004,43:367-382
[4]	Lowenstein A,Slayzak S,Kozubal E.A zero carryover liquid-desiccant air conditioner for solar applications//ASME International Solar Energy Conference.Denver,2006
[5]	Kessling W,Laevemann E,Peltzer M.Energy storage in open cycle liquid desiccant cooling systems[J].Int. J. Refrig.,1998,21(2):150-156
[6]	Sanjeev Jaina,Bansal P K.Performance analysis of liquid desiccant dehumidification systems[J].International Journal of Refrigeration,2007,30:861-872
[7]	Factor H M,Grossman G.A packed bed dehumidifier/regenerator for solar air conditioning with liquid desiccants[J].Solar Energy,1980:541-550
[8]	Oberg V,Goswami D Y.Experimental study of the heat and mass transfer in a packed bed liquid desiccant air dehumidifier[J].Journal of Solar Energy Engineering,1998,120(4):289-297
[9]	Yin Yonggao,Zhang Xiaosong.Comparative study on internally heated and adiabatic regenerators in liquid desiccant air conditioning system[J].Building and Environment,2010,45:1799-1807
[10]	Gandhidsan P.Quick performance predictions of liquid desiccant regeneration in a packed bed[J].Solar Energy,2005,79(1):47-55
[11]	Liu Xiaohua(刘晓华).Combined heat and mass transfer characteristic in air handling process using liquid desiccant.Beijing:Tsinghua University,2007
[12]	Saury D,Harmand S,Siroux M.Flash evaporation from a water pool:influence of the liquid height and of the depressurization rate[J].International Journal of Thermal Sciences,2005,44:953-965
[13]	Adel K El-Fiqi,Ali N H,El-Dessouky H T,Fath H S,El-Hefnic M A.Flash evaporation in a superheated water liquid jet[J].Desalination,2007,206:311-321
[14]	Li Luning(李鲁宁),Hu Shenhua(胡申华),Guo Yingli(郭迎利).Experimental study on heat transfer characteristics of flash evaporation of water film in open system[J].Journal of Xi’an Jiaotong University(西安交通大学学报),2007,41(1):1-4
[15]	Kim B S,Shin H T,Lee Y P,Jurng J.Study on ice slurry production by water spray[J].International Journal of Refrigeration,2001,24:176-184
[16]	Zhang Shaozhi(张绍志),Wang Jianfeng(王剑锋),Chen Guangming(陈光明).Theoretical analysis of the flash vaporizer in a refrigeration system using water as refrigerant[J].Cryogenics(低温工程),2000,46(3):12-18

Droplet flash evaporation of mixed dehumidification solutions

混合除湿盐溶液液滴闪蒸机理

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