不同溶液降膜型景观除湿系统吸湿量的研究
Research on moisture absorption capacity of falling film landscape dehumidification system with different solutions
摘要：
分析了降膜除湿的湿传递机理，运用相际平衡和双膜传质理论，建立了降膜除湿系统的物理模型与数学模型，得到了降膜溶液吸湿量计算公式。搭建了降膜型景观除湿系统稳态除湿实验台，根据配制的CaCl2和LiCl饱和溶液，进行了稳态变工况除湿实验。CaCl2溶液和LiCl溶液稳态工况下的吸湿量理论值与实验值的比较结果显示：在一定空气温度和相对湿度范围内，理论模型所得公式对于CaCl2溶液和LiCl溶液的降膜景观除湿系统吸湿量计算均具有较高的计算精度，可以应用于类似降膜除湿系统的相关理论计算中。
Abstract：
Analyses the moisture transmission mechanism of the falling film dehumidification. Establishes the physical and mathematical models of the falling film dehumidification using the inter-phase equilibrium and double film mass transfer theory. Obtains the calculation formula of moisture absorption capacity. Establishes a steady-state dehumidification experimental test table for the falling film landscape dehumidification system. After preparation of CaCl2 and LiCl saturated solutions, conducts the steady-state variable working condition dehumidifying experiments. Compares the moisture absorption capacity for CaCl2 and LiCl solutions between theory and experiment under the steady-state working condition. The result shows that the theoretical model formula has relative high calculation accuracy for calculation of the moisture absorption capacity in the falling film dehumidification system under the certain air temperature and relative humidity, when CaCl2 and LiCl solutions are used. It can be applied to related theoretical calculation of similar falling film dehumidification system.
Keywords:falling film landscape dehumidification, moisture absorption capacity, CaCl2 solution, LiCl solution, calculation formula