一种新型真空除湿膜的除湿性能研究  

Study on Dehumidification Performance of A New Vacuum Dehumidification Film

作　　者：王洪顺 龚光彩[1] 淳良 石星 胡世安 WANG Hongshun;GONG Guangcai;CHUN Liang;SHI Xing;HU Shian(College of Civil Engineering,Hunan University,Changsha 410082,Hunan,China;College of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《建筑科学》2024年第8期229-235,290,共8页Building Science

基　　金：湖南省重点研发计划“人源化小鼠质量保障关键技术研究及应用”(2020DK2003)。

摘　　要：水蒸气选择性透过膜是真空膜除湿技术的重要部件。本文将聚乙烯醇、羧甲基纤维素钠与氯化锂的混合溶液涂敷在针刺聚四氟乙烯毡上制成真空除湿膜,并通过实验测试该膜的除湿性能,分析渗透侧真空度与湿空气流量对其除湿性能的影响。实验结果表明,该膜能够稳定运行600 h。当增大渗透侧真空度时,膜的除湿性能系数(Coefficient Of Performance,COP)随之减小,而除湿效率、水蒸气渗透率、空气渗透率和选择性均随之增大。当增大湿空气流量时,膜的除湿COP、除湿效率以及选择性均随之减小,而膜的水蒸气渗透率和空气渗透率均随之增大。当湿空气流量为6 L/min,渗透侧真空度为30 kPa时,膜除湿COP约为3.12。当渗透侧真空度为90 kPa,湿空气流量为8 L/min时,膜的最大水蒸气渗透率约为5167 GPU(1 GPU=3.35×10^(-10)(mol/Pa·m^(2)·s))。本文可为真空膜除湿空调系统的技术开发提供参考。Water vapor selective permeation membrane is an important component of vacuum membrane dehumidification technology.This paper applied a mixed solution of polyvinyl alcohol,sodium carboxymethyl cellulose,and lithium chloride on a needle punched polytetrafluoroethylene felt to create a vacuum dehumidification membrane.The dehumidification performance of the membrane was tested through experiments,and the effects of vacuum on the permeating side and wet air flow rate on its dehumidification performance were analyzed.The experimental results indicate that the membrane can operate stably for 600 hours.When the vacuum degree on the permeation side is increased,the coefficient of dehumidification performance(COP)of the membrane decreases,while the dehumidification efficiency,water vapor permeability,air permeability,and selectivity all increase.When the wet air flow rate is increased,the dehumidification COP,dehumidification efficiency,and selectivity of the membrane decrease,while the water vapor permeability and air permeability of the membrane also increase.When the wet air flow rate is 6 L/min and the vacuum degree on the permeation side is 30 kPa,the membrane dehumidification COP is about 3.12.When the vacuum degree on the permeation side is 90 kPa and the wet air flow rate is 8 L/min,the maximum water vapor permeability of the membrane is about 5167 GPU(1GPU=3.35×10^(-10)(mol/Pa·m^(2)·s)).This paper can provide a reference for the technical development of vacuum film dehumidification air conditioning systems.

关 键 词：真空膜除湿 温湿度独立控制 空调系统 除湿性能 除湿膜 

分 类 号：TU834.9[建筑科学—供热、供燃气、通风及空调工程]