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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。
Dehumidification and efficient regeneration of the desiccant air conditioning system is an important guarantee for the operation. In order to study the regeneration efficiency of dehumidification solution, the vacuum technology was applied to the regeneration process of the solution, and a dehumidification solution regeneration test bench under vacuum condition was set up. The vacuum regeneration tank provides the required heat from the hot water at low temperature, and the evaporated water vapor condenses in the water trap. Under certain degree of vacuum, the effects of different factors such as solute mass fraction, hot water temperature and cold water temperature on regeneration performance were analyzed. Water evaporation rate as an indicator. The experimental bench operating pressure is 5kPa, solute mass fraction is 28% ~ 34%, hot water temperature range is 56 ~ 62 ℃, cold water temperature range is 14 ~ 20 ℃. The experimental results show that the effect of solute mass fraction and hot water temperature on evaporation rate is significant. The hot water increases from 56 ℃ to 62 ℃, and the evaporation rate increases by 34.5%. The mixed model and the self-defined function are used to simulate the regeneration process. The simulation results are in good agreement with the experimental results.