东南大学学报（自然科学版）2024，Vol.54Issue(4)：1014-1021,8.DOI:10.3969/j.issn.1001-0505.2024.04.026
管式蒸发冷却下LiCl-CaCl2混合溶液降膜除湿特性分析
Analysis on falling film dehumidification characteristics of LiCl-CaCl2 mixed solution under tubular evaporative cooling
摘要
Abstract
Aiming at the low performance of adiabatic solution dehumidifiers,a tube evaporative cooling solu-tion dehumidifier was designed,and LiCl-CaCl2 mixed aqueous solution with high economy was used as the liquid desiccant.The effects of the mass ratio of LiCl and CaCl2,solution parameters and air parameters on the heat and humidity transfer characteristics of the dehumidifier under evaporative cooling and adiabatic conditions were numerically simulated using the theoretical model.The results show that the dehumidification rate per u-nit area of the dehumidifier under evaporative cooling condition is higher than that under adiabatic condition with the increase proportion of up to 41.5％.The smaller the mass fraction of LiCl in the solution,the more significant the performance advantage.The dehumidification advantage of evaporative cooling is significantly affected by the solution temperature.The dehumidification rate per unit area is positively correlated with the dehumidification air flow-rate and negatively correlated with the solution flow-rate.The dehumidification char-acteristics under evaporative cooling with different mixed mass ratios of LiCl and CaCl2 are mainly affected by the solution temperature.When the solution temperature is low,the effect of the decrease of the mass fraction of LiCl on the dehumidification performance is little.Under the two operating conditions,the positive im-provement rate of the air flow-rate on the dehumidification rate per unit area of the dehumidifier reaches 136.9％to 168.1％,while the effect of solution flow rate is weak.关键词
蒸发冷却/除湿/水溶液/混合质量比/数值模拟Key words
evaporative cooling/dehumidification/aqueous solution/mixing mass ratio/numerical simulation分类
建筑与水利引用本文复制引用
彭冬根,骆莹莹,殷勇高,徐少华..管式蒸发冷却下LiCl-CaCl2混合溶液降膜除湿特性分析[J].东南大学学报（自然科学版）,2024,54(4):1014-1021,8.基金项目
国家自然科学基金国际(地区)合作交流资助项目(52111530131)、南昌大学江西省财政科技专项"包干制"试点示范资助项目(ZBG20230418019). （地区）
