平板型双流道太阳能空气集热器热性能研究  

THERMAL PERFORMANCE ANALYSIS OF A FLAT PLATE SOLAR AIR COLLECTOR WITH DOUBLE CHANNELS

作　　者：王林军[1] 高章维 张东[2] 刘伟[1] 

机构地区：[1]兰州理工大学机电工程学院,兰州730050 [2]兰州理工大学能源与动力工程学院,兰州730050

出　　处：《太阳能学报》2016年第10期2562-2568,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51166008);国家高技术研究发展(863)计划(2014AA052801);甘肃省教育厅高等学校科研项目(2015A-040)

摘　　要：基于已产业化应用的平板型太阳集热器,在长度方向上加工形成空气流道,进出口位置以对角线形式布置,提出一种平板型双流道太阳能空气集热器,搭建空气集热器实验平台,对改型后的集热器进行空气集热实验与分析。研究结果表明:在太阳辐射强度及环境温度平均值分别为535.2 W/m^2和22.2℃、空气质量流量为0.024 kg/s时,基于采光面积的集热效率平均值与最大值分别为51.29%和53.93%,空气最大温升与最大温差分别为60.4℃和40.6℃,热迁移因子为0.55;以对角线形式布置的空气进、出口和空气的双流道式流动,可增加空气流道长度,强化与吸热板的对流换热。这种空气集热器具有改型方便、成本低廉、易于产业化生产等优点,可广泛应用于采暖、干燥、通风等方面。The flat plate solar air collector with double channels was proposed based on flat plate solar collector used widely in hot water supply, building heating, air conditioning and other fields. The air flow channels of air collector were arranged in length direction of the collector, the entrance and exit positions were arranged in diagonal form. The test platform of air collector was established to test and analyze the thermal performance of improved air collectors. The results show that the average and maximum efficiency of air collector based on the day lighting area are 51.29% and 53.93%, respectively when the average solar radiation intensity and environmental temperature are 535.2 W/m^2 and 22.2 ℃, the mass flow rate of air is 0.024 kg/s, respectively. The maximum temperature rise and temperature difference of the working fluid （air） are 60.4 ℃ and 40.6 ℃, respectively, and the heat transfer factor is about 0.55. The length of air flow channel can be increased and the convection heat transfer between working fluid and absorber plat can be strengthened for diagonally arranged air inlet and outlet flow of double flow channels. This type of solar air collector has the advantages of convenient remodeling, low cost, easy industrialization, and can be applied to the field of heating,drying and ventilation, etc.

关 键 词：太阳能空气集热器 集热效率 总热损系数 热迁移因子 归一化温差 

分 类 号：TK512[动力工程及工程热物理—热能工程]