摘要
为了对武汉地区太阳能集热器的有效应用提供可靠参考,用本文利用Fluent软件,在武汉地区冬季气象条件下分别对集热管管长为1800~2100 mm、管径为41~53 mm、安装倾角为33°~51°的全玻璃真空管太阳能集热器集热过程进行模拟,并进行实验验证。结果显示,实验值与模拟值拟合度为90%以上;安装倾角由33°增加至51°时,水箱流体温度升高1.59℃,集热效率升高了1.21%;当集热管管长由1800 mm增加至2100 mm时,水箱流体温度升高1.08℃,集热效率降低了1.28%;集热管管径由41 mm增加至53 mm时,水箱流体温度升高1.53℃,集热效率降低了2.05%。结果表明,武汉地区集热器倾角不应小于51°,集热器单位吸热面积容水量越大,流体温度越小、集热效率越高。
In order to provide a reliable reference for the effective application of solar collectors in Wuhan,Fluent software is used in this paper to measure the length of the collector tubes with a length of 1800~2100 mm,a diameter of 41~53 mm,and an installation inclination under the winter weather conditions in Wuhan.The heat collection process of 33~51°all-glass evacuated tube solar collector is simulated and verified by experiments.The results show that the fitting degree between the experimental value and the simulated value is more than 90%;when the installation inclination is increased from 33°to 51°,the fluid temperature of the water tank increases by 1.59℃,and the heat collection efficiency increases by 1.21%;When the mm increases to 2100 mm,the temperature of the fluid in the water tank increases by 1.08℃,and the heat collection efficiency decreases by 1.28%;when the diameter of the collector tube increases from 41 mm to 53 mm,the temperature of the fluid in the water tank increases by 1.53℃,and the heat collection efficiency decreases by 2.05%.The results show that the inclination angle of the collector in Wuhan should not be less than 51°.The larger the water capacity per unit heat-absorbing area of the collector,the lower the fluid temperature and the higher the heat collection efficiency.
作者
焦良珍
刘志玥
毛前军
JIAO Liang-zhen;LIU Zhi-yue;MAO Qian-jun(Wuhan University of Science and Technology,Wuhan 430065,China)
出处
《节能技术》
CAS
2022年第3期220-226,共7页
Energy Conservation Technology
基金
国家自然科学基金(51876147)。
关键词
太阳能
模拟
结构参数
集热性能
单位吸热面积容水量
solar energy
simulation
structural parameters
heat collection performance
water capacity per unit of heat absorption area
