地板表面发射率对地暖性能的影响  

The Influence of Floor Surface Emissivity on Performance of Floor Heating

作　　者：邹锐婷 吴会军[1,2] 刘彦辰 杨文兵[1] 王宇轩 ZOU Ruiting;WU Huijun;LIU Yanchen;YANG Wenbing;WANG Yuxuan(College of Civil Engineering,Guangzhou University;Institute of Building Energy Efficiency,Guangzhou University)

机构地区：[1]广州大学土木工程学院 [2]广州大学建筑节能研究院

出　　处：《建筑热能通风空调》2021年第9期14-18,共5页Building Energy & Environment

基　　金：国家重点研发计划资助项目(2018YFD1101005)。

摘　　要：分别采用石墨烯涂料和银粉漆对地板表面进行改性,制备了表面发射率分别为0.86和0.46的地板。采用地板供暖实验装置测试了不同发射率表面的地板供暖性能,结果表明在热源温度分别为28℃、3 6℃、4 1℃的情况下,表面发射率为0.86的地板比表面发射率为0.46的地板表面温度分别升高1.6℃,1.1℃和0.5℃,总供热量分别增大25.4 W/m^(2),3 5.2 W/m^(2)和42.9 W/m^(2)。对不同发射率的地板表面供暖性能进行了计算,计算结果与实测数据误差约为3%。研究了地板表面发射率对地板辐射换热量的影响,结果表明辐射换热量随地面发射率增大近似线性增大,且对于较高的热源温度,对应的线性斜率相应增大。The surface of the floor was modified with graphene paint and silver powder paint, and the surface emissivity was 0.86 and 0.46 respectively. The performance of floor heating on different emissivity surfaces was tested by floor heating experiment. The results show that when the heat source temperature is 28 ℃, 36 ℃ and 41 ℃ respectively, the surface temperature with a surface emissivity of 0.86 is 1.6 ℃, 1.1 ℃ and 0.5 ℃ higher than the surface temperature with a surface emissivity of 0.46, and the total heat supply increases by 25.4 W/m^(2), 35.2 W/m^(2) and 42.9 W/m^(2) respectively.The heating performance of floor surface with different emittance is calculated, and the error between the calculated result and the measured data is about 3%.The effect of floor surface emissivity on floor radiant heat exchange is studied.The results show that the radiant heat exchange increases linearly with the increase of ground emissivity, and the linear slope increases correspondingly for higher heat source temperature.

关 键 词：表面发射率 地板供暖 辐射换热 表面温度 供热量 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]