基于当地纬度倾角太阳能集热棚集热特性分析  

HEAT COLLECTING CHARACTERISTICS ANALYSIS OF SOLAR HEAT COLLECTING SHED BASED ON LOCAL LATITUDE

作　　者：聂晶[1] 蔡琦龙 田瑞[1,2] 张维蔚 郭子睿[1] 阮强 Nie Jing;Cai Qilong;Tian Rui;Zhang Weiwei;Guo Zirui;Ruan Qiang(College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Key Laboratory of Wind Energy and Solar Energy of the Ministry of Education,Hohhot 010051,China;Hohhot Chengfa Heating Co.,Ltd.,Hohhot 010010,China)

机构地区：[1]内蒙古工业大学能源与动力工程学院,呼和浩特010051 [2]内蒙古可再生能源重点实验室,呼和浩特010051 [3]呼和浩特市城发供热有限公司,呼和浩特010010

出　　处：《太阳能学报》2018年第8期2203-2208,共6页Acta Energiae Solaris Sinica

基　　金：内蒙古自治区重大基础研究开放课题(2017);内蒙古自然基金(2017MS0530)

摘　　要：选取太阳能烟囱集热棚集热特性为研究对象,采用40°作为太阳能烟囱集热棚倾角进行实验测试,对集热棚内蓄热层在该倾角下不同太阳总辐照度（GHI）的最高温度,温度场均匀性,蓄热层壁面Nu展开分析。结果表明,随着GHI的增大,蓄热层最高温度及温度场均匀性变化趋势不同。对湍流强制对流传热的准则间关联式进行拟合,利用最小二乘法得出在Re为1.3×10~4~3.0×10~5、Pr为0.694~0.703范围之间,基于当地纬度集热棚倾角湍流强制对流传热准则间关联式,耦合系数为0.9261。Taking heat collecting characteristics of heat collecting shed with solar chimney as the research object,40°slope angle of solar chimney was used to carry out the experimental test.At this slope angle,the analyses of maximum temperature,the uniformity of the temperature field,and the wall Nu number of heat storage layer in heat collecting shed under different total solar irradiance were carried out.The results show that with increases of total solar irradiance,the maximum temperature and temperature field uniformity of heat storage layer have different change trend.The fitting of the correlation between the criteria for turbulent forced convection heat transfer is carried out,the least square method is used to obtain that Re is between 1.3×10~4 and 3.0×10~5 and Pr is between 0.694 and 0.703,for the correlation between turbulence forced convection heat transfer criterion and slope angle of solar chimney for heat collecting shed based on local latitude,coupling coefficient is 0.9261.

关 键 词：太阳能烟囱 Nu数 温度场 集热棚倾角 

分 类 号：TK514[动力工程及工程热物理—热能工程]