摘要
除湿溶液的高效再生是除湿空调系统运行的重要保障。为研究除湿溶液的再生效率,将真空技术应用于溶液的再生过程,搭建了真空条件下的除湿溶液再生试验台。真空再生罐由低温热水提供所需热量,蒸发的水蒸汽在捕水器中凝结。在一定真空度下,分析了溶质质量分数、热水温度、冷水温度等不同因素对再生性能的影响。以水分蒸发率作为评价指标。实验台操作压力为5kPa,溶质质量分数取值为28%～34%,热水温度区间为56～62℃,冷水温度区间为14～20℃。实验结果表明：溶质质量分数和热水温度对蒸发率的影响较为显著,热水由56℃增加到62℃,蒸发率提高了34.5%。利用混合模型和自定义函数对再生过程进行了数值模拟,模拟结果与实验结果基本吻合。
Abstract Here, we addressed the vacumn recycling of the desiccant solution, widely used in air conditioners. Dehy- dration of the diluted desiccant solution by vacuum distillation was mathematically modeled, numerically simulated with CFD software, and measured with the lab-built platform. The impact of the dehydration conditions, including but not limit- ed to the mass fraction of solute （28% ～ 34% ）, temperatures of water heating （56 ～ 62℃ ） and water cooling （ 14 ～ 20℃ ） ,and pressure,on the distillation rate was investigated. The experimental results show that at a fixed low-pressure, tile mass fraction and water heating-temperature have a major impact on the distillation rate. For example, recycled at 5 kPa, an increase of the water-heating temperature from 56 to 62℃ increased the distillation rate by 34.5 %. The measured and simulated results were found to be in fairly good agreement.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2015年第5期544-549,共6页
Chinese Journal of Vacuum Science and Technology
关键词
真空条件
溶液再生
除湿剂
蒸发率
Vacuum condition
Solution regeneration
Dosiccant
Evaporative rate
