摘要
为防止夏季室外温度过高情况的发生,提高建筑墙体的节能率,提出一种集相变材料、微槽道热管、丙烯酸树脂辐射制冷板为一体的新型节能墙体。为测试新型墙体的热工性能,构建1个南墙为新型墙体的实验房间(房间C);另外搭建2个南墙分别为砖墙、相变-砖墙的实验房间(房间A、B)作为参照房间。经实验测试分析得:1)房间C南墙内表面峰值温度比室外综合峰值温度低30.7℃,降低了52.5%,时间延迟为4.5 h;2)房间C室内日平均温度比房间B低0.4℃;3)房间C通过南墙的得热量比房间A、B分别低41.4%、21.3%。因此,新型节能墙体在夏季降低温度、减少得热量等方面均具有较好的实践效果。
To prevent the excessive of the excessive indoor temperature in summer and improve the energy savings of building walls,a novel wall is proposed,which is made up of the phase change materials(PCMs),micro-channel heat pipes(MCHP)and the radiative cooling(RC)plate with acrylic resin.In order to investigate the thermal performance of the novel wall,an experimental room(Room C)is built as reference room in which the south wall is RC-MCHP-PCMs wall.Additionally,two same size experimental rooms are also built,one of which the south wall was brick wall(Room A),other of which the south wall is PCMs-brick wall(Room B).The experimental results show:1)the interior surface peak temperature of south wall for Room C is 30.7℃lower than the solar-air peak temperature,which is reduced by 52.5%and the time lag is 4.5 h;2)the average daily air temperature of Room C is 0.4℃ lower than that of Room B;3)the heat gain of Room C is respectively 41.4% and 21.3%lower than that of Rooms A and B through the south wall.Totally,the novel wall has a good practical effect on reducing temperature and heat gain in summer season.
作者
余才锐
沈冬梅
何伟
胡中停
Yu Cairui;Shen Dongmei;He Wei;Hu Zhongting(Collegeof Civil Engineering,Hefei University of Technology,Hefei 230009,China;College of Architecture and Civil Engineering,West Anhui University,Lu’an 237012,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第4期123-128,共6页
Acta Energiae Solaris Sinica
基金
青海省科技合作项目(2017-HZ-807)
安徽省自然科学基金青年项目(JZ2019AKZR0248)。
关键词
建筑节能
相变材料
微槽道热管
天空辐射制冷
大气窗口
building energy saving
phase change materials
micro-channel heat pipe
radiative cooling
atmospheric window
