基于焓湿图的辐射板作为表冷器空气热湿处理过程分析  

Analysis of the Air Treatment Process of a Radiant Panel as a Surface Cooler Based on a Psychrometric Chart

作　　者：王颖娟 龚光彩[1] 周敏瑞 黎航欣 田彩霞 Wang Yingjuan;Gong Guangcai;Zhou Minrui;Li Hangxin;Tian Caixia(College of Civil Engineering,Hunan University,Changsha,410082,China)

机构地区：[1]湖南大学土木工程学院

出　　处：《制冷学报》2019年第6期125-131,165,共8页Journal of Refrigeration

基　　金：国家科技支撑计划(2015BAJ03B00);国家自然科学基金(51378186)资助项目~~

摘　　要：本文建立了辐射板供冷与风机盘管结合的复合供冷方式下实验房间的传热传湿模型,提出将辐射板看作一种特殊的"表冷器",在处理室内空气时分干工况和湿工况两种情况:在干工况下辐射板对空气实施局部等湿冷却;在湿工况下辐射板对空气实施减焓、减湿冷却。在夏季工况对辐射供冷系统的温湿度等参数进行了实验测量,并将室内各状态点表示在焓湿图上,计算得到风机盘管与辐射板各自所承担的负荷大小。结果表明:当辐射板通水温度为20℃时,辐射板只承担显热负荷,大小为0. 85 k W;当辐射板通水温度为10℃时,辐射板在湿工况下运行,所承担的潜热负荷为0. 10 k W;得到了基于焓湿图的控制辐射板不结露的临界热力学条件,即辐射板送风状态点与室内空气状态点的焓值相等。A heat and moisture transfer model of an experimental room under the combined cooling mode of radiant panel cooling and a fan coil unit was established in this study.It was proposed to consider the radiant panel as a special“cooler”.The radiant panel was divided into a dry condition and wet working condition when processing indoor air.Under the dry condition,the radiant panel treated the air in a constant vapor content.Under the wet condition,the radiant panel treated the air withan enthalpy reduction and a dehumidification.During the summer,experimental measurements were taken on parameters such as the temperature and humidity of the radiant cooling system and state points were expressed on apsychrometric chart.The load of the fan coil unit and the radiant panel were calculated.The results show that when the water temperature of the radiant panel is 20℃,the radiant panel only bears the sensible heat load at a size of 0.85 kW;when the radiant panel water temperature is 10℃,the radiant panel operates under wet conditions and the latent heat load is 0.10 kW.Critical state conditions are obtained for controlling the radiant panel without condensation based on the psychrometric chart,i.e.,the state of the convective air from the radiant panel has equal enthalpy of the indoor air state.

关 键 词：空气调节 热湿处理 焓湿图 辐射末端 潜热负荷 

分 类 号：TU831.4[建筑科学—供热、供燃气、通风及空调工程] TU834.9