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本文提出了CO2跨临界循环耦合绝热吸收型两级溶液除湿系统,直接使用跨临界循环压缩机高温排气再生LiCl溶液,充分利用了跨临界循环排气温度高和温度滑移大的特点.本文使用LiCl溶液作为除湿剂,建立了复合系统的热力学模型,分析得到可用排热的温度滑移范围为120～50℃.耦合系统能够实现温湿度独立控制,跨临界循环的蒸发温度得到明显提高.一级除湿器除湿量占比与湿空气入口含湿量呈单调递增关系.一级除湿器进口 LiCl溶液温度降低、浓度增大,能够提高溶液除湿循环的性能系数.耦合系统的可用排热与蒸发温度密切相关,存在一个临界蒸发温度使得可用排热满足系统再生需求.对比CO2跨临界循环冷却除湿,在相同除湿量下,使用本文耦合系统进行除湿,跨临界循环的COP提高5.6％,压缩功减少29％.“,”A novel hybrid system of adiabatic absorption two-stage liquid desiccant and CO2 transcritical cycles is proposed,where LiCl solutions are used as desiccants. Dissipated heat of the transcritical cycle is used to regenerate LiCl solutions, and the heat could be utilized efficiently with large temperature decrease. From insight of thermodynamics, model of the hybrid system is built. Based on the calculation results, temperatures of the utilized heat could range from 120℃ to 50℃. In addition, temperature and humidity independence control could be conducted by the hybrid system and its evaporation temperatures could be obviously lifted. From the analysis, the dehumidification rate of the first dehumidifier increases when the moisture contents of ambient air increases. COP of the two-stage liquid desiccant cycle could be lifted when the temperature of LiCl solutions decreases and the concentration of LiCl solutions increases at the inlet of first dehumidifier. Available dissipated heat and evaporation temperature are closely related of the hybrid system. There is a critical evaporation temperature that makes the available dissipated heat to fully meet the need for regeneration of the hybrid system. Comparing with cooling dehumidification by a conventional CO2 transcritical cycle, under the same dehumidification capacity, COP of the transcritical cycle could be improved by 5.6％ and compression work could be decreased by 29％.