不同气候区典型城市室内辐射空调高透膜防结露特性  

Anti-condensation Characteristics of High Permeability Films for Radiation Air Conditioning in Typical Urban Indoor Environments of Different Climate Zones

作　　者：渠景伟 麻建超 郑晓红[1] 陈卫杰 钱华[1] Qu Jingwei;Ma Jianchao;Zheng Xiaohong;Chen Weijie;Qian Hua(School of Energy and Environment,Southeast University,Nanjing,211189,China;Wuxi Freshair AQ Technology Co.,Ltd.,Wuxi,214000,China)

机构地区：[1]东南大学能源与环境学院,南京211189 [2]无锡菲兰爱尔空气质量技术有限公司,无锡214000

出　　处：《制冷学报》2024年第5期90-97,共8页Journal of Refrigeration

基　　金：江苏省绿色建筑发展专项(2021ZD24)资助。

摘　　要：辐射供冷空调系统具有节能和舒适的优点,但结露问题限制其应用推广。在冷板外加红外高透膜,可以在升高红外高透膜与室内空气接触面温度的同时,保证空调系统的辐射制冷量,达到降低辐射空调结露的风险。构建了红外透射膜辐射制冷的传热模型,计算了高透膜红外透过率对露点温度及辐射冷量的影响,预测了不同气候区典型城市自然通风防结露的最小透过率及相应最大制冷量,从而评估不同气候区辐射制冷利用红外透射膜的潜力,最后评估了高透膜红外透过率对人体热舒适性的影响。研究结果表明:建立的辐射热传递模型可以准确预测室内膜面传热过程;在保证辐射冷量的前提下,透射膜可以提高不凝水露点温度阈值4~17℃;不同城市要求的最小透过率不同,呼和浩特最低为0.4,重庆最高为0.95。红外透射膜可作为一种新型方法用于辐射空调冷源壁面的防结露,研究可为透射膜的设计及选择提供参考。Radiant cooling air conditioning systems offer energy savings and thermal comfort;however,the dew problem limits their application and popularization.In this study,a method of applying an infrared high-permeability film to a cold plate was proposed to increase the temperature of the contact surface between the infrared high-permeability film and indoor air while ensuring the radiation cooling capacity of the air conditioning system.This reduces the risk of condensation.A heat transfer model of an infrared transmitting film for radiation refrigeration was constructed,and the influence of the infrared transmittance of the highly permeable film on dew point temperature and radiant cooling capacity was calculated.In addition,the minimum transmittance and corresponding maximum cooling capacity of natural ventilation for preventing condensation in typical cities of different climate zones were predicted,and the effect of the infrared transmittance of the high permeability film on human thermal comfort was evaluated.The results show that the radiant heat transfer model can accurately predict the heat transfer process at the membrane surface.Under the premise of ensuring radiation cooling capacity,the transmission film can increase the dew point temperature by 4℃-17℃.The minimum transmittance required by different cities vary,with Hohhot and Chongqing having the lowest and highest rates of 0.4 and 0.95,respectively.Infrared transmission films can be used as a novel method to prevent condensation on the cold walls of radiant air conditioning systems.This study thus provides a reference for the design and selection of transmission films.

关 键 词：辐射空调 防结露 制冷量 高透膜 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程] TB611[一般工业技术—制冷工程]