基于太阳能烟囱发电系统集热性能试验的集热棚倾角优选  

Optimal collector angle by test on heat collection performance of solar chimney power plant system

作　　者：聂晶[1] 田瑞[1,2] 蔡琦龙 高虹 郭子睿[1] 张维蔚 Nie Jing;Tian Rui;Cai Qilong;Gao Hong;Guo Zirui;Zhang Weiwei(College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Inner Mongolia Renewable Energy Laboratory,Hohhot 010051,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

出　　处：《农业工程学报》2018年第12期224-229,309,共7页Transactions of the Chinese Society of Agricultural Engineering

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

摘　　要：选取太阳能烟囱发电系统集热特性为研究对象,针对太阳能烟囱发电系统在不同集热棚倾角的集热特性进行试验测试。对不同集热棚倾角下蓄热层温度场及集热棚内竖直平面温度场的分布特性参数进行计算分析。通过对呼和浩特地区太阳能烟囱集热棚倾角为0°~40°分别进行比较分析结果表明:在呼和浩特地区10°集热棚倾角在春夏秋季不同太阳辐照强度GHI(global horizontal irradiance)下,蓄热层温度场温度存在最大值且均匀性最佳;竖直平面温度场温度分布最佳;竖直平面内Gr数最大。得出在10°集热棚倾角下太阳能烟囱集热棚内各项集热性能具有最优值。此试验研究为在呼和浩特地区实现太阳能烟囱搭建提供技术支撑。The solar chimney power plant（SCPP） is a natural draft device which uses solar radiation to provide upward momentum to the flowing air, thereby converting the thermal energy into kinetic energy. It is made of three parts： Collector, solar chimney and turbine. A study was undertaken to evaluate the performance of solar chimney experimentally in different collector angles of solar chimney power plant. In this study, an experimental instrument was constructed which was developed to study the effect of various parameters of the solar chimney. The effects of the collector slope angles on the solar chimney performance were studied. The distribution characteristics of the temperature field and vertical plane temperature field in the heat reservoir of different sets were analyzed. The local characteristics of the air were presented and analyzed. The results showed that the maximum temperature of the heat storage layer was kept between 71-88 ℃ in conditions with the same global horizontal irradiance（GHI）. The non-uniformity of the thermal storage layer increased gradually as the angle of the collector slope was increased. The highest temperature and the Gr number in the vertical plane decreased gradually with the increase of collector angle. The temperature field distribution of thermal storage layer was different under different collector slope angles. The uniformity of temperature field was different. When the collector slope angle was 10°, the experimental data was optimal. The ambient temperature and the wind speed influenced the maximum temperature of thermal storage layer under the same irradiation intensity. The vertical plane temperature distribution in the collector was different under different collector slope angles. The maximum temperature in the collector outlet increased with the decrease of the collector slope angle. With the heat collector slope angle of 10 °, the average temperature in the outlet of the collector shed was 53.5 ℃, which was the maximum value compared with that of the other

关 键 词：太阳能 温度 太阳能烟囱 集热棚倾角 

分 类 号：TK514[动力工程及工程热物理—热能工程]