摘要
通过分析太阳能槽式集热器真空集热管的热性能,建立了槽式集热器真空集热管稳态传热模型,通过和典型实验数据对比,验证该模型的适用性和准确性。在此基础上,分析在无光照条件下,吸热管内壁温度、环境温度、风速和集热管残存气体种类等因素对集热管热损失的影响。结果表明:吸热管内壁温度的升高会增大玻璃管外壁温度和集热管热损失;环境温度和风速对玻璃管外壁温度有显著影响,但对热损失的影响甚微;吸热管与玻璃管之间以辐射传热为主,对流换热受环形区域残存气体种类和压力的影响。
The steady-state heat transfer model of solar evacuated tube was established by analyzing the thermal performance of solar evacuated tube for parabolic trough collector.The applicability and accuracy of the model were verified by comparing with typical experimental data.On the basis,the effects of the inner wall temperature of the heat-absorbing tube,ambient temperature,wind speed and residual gas type on the heat loss of solar evacuated tube in the absence of light were analyzed.The results show that the increase of the inner wall temperature will increase the outer wall temperature of glass tube and heat loss of collector tube;ambient temperature and wind speed have significant effects on the temperature of the outer wall of the glass tube,but have little effect on the heat loss;the heat transfer between the heat-absorbing tube and the glass tube is mainly by radiation,and the convective heat transfer is affected by the type and pressure of residual gas in the annular region.
作者
王南飞
陈娉婷
夏伟泽
WANG Nanfei;CHEN Pingting;XIA Weize(China Shipbuilding New Power Co.,Ltd.,Beijing 100097,China;College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China;Integrated Energy Institute,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China)
出处
《能源与节能》
2023年第12期177-180,共4页
Energy and Energy Conservation
关键词
太阳能
槽式集热器
真空集热管
传热
热损失
solar energy
parabolic trough collector
evacuated tube
heat transfer
heat loss
