中国电机工程学报2025，Vol.45Issue(z1)：245-253,9.DOI:10.13334/j.0258-8013.pcsee.250917
吸热器管屏污垢热阻对温度场与应力场的影响研究
Research on the Influence of Fouling Thermal Resistance of Heat Absorber Tube Screen on Temperature Field and Stress Field
摘要
Abstract
Driven by the global demand for clean energy,this study focuses on the fouling thermal resistance problem of the tube screen of the heat absorber,a core component of the solar thermal system.Through three-dimensional numerical modeling,it reveals its influence mechanism on the temperature field and stress field.The coupling model of fouling thermal resistance-temperature field-stress field was constructed by using Ansys Workbench.The reliability of the model was confirmed through grid independence verification and experimental comparison.Research shows that although the fouling thermal resistance does not change the temperature and stress distribution trends,it significantly increases the temperature and stress on the sunny side.The maximum temperature of the W1 tube screen rises from 469.47℃to 556.3℃,and the equivalent stress increases from 258.41 MPa to 370.11 MPa,with an increase of 43.22%.The thermomechanical coupling effect in the flow direction of molten salt leads to the non-monotonic variation characteristics of stress,and there is a stress concentration at the level of 500MPa at the connection between the transition pipe and the illuminated pipe.Research has confirmed that the fouling thermal resistance causes local temperature rise and thermal stress by increasing the thermal resistance,providing theoretical support for the anti-fouling design and safe operation of solar heat absorbers.关键词
吸热器管屏/污垢热阻/温度场/应力场Key words
heat absorber tube screen/fouling thermal resistance/temperature field/stress field分类
动力与电气工程引用本文复制引用
赵建国,李华安,宋永富,李琪,周昊..吸热器管屏污垢热阻对温度场与应力场的影响研究[J].中国电机工程学报,2025,45(z1):245-253,9.基金项目
中央高校基本科研业务费专项资金项目(2022ZFJH04). Fundamental Research Funds for the Central Universities(2022ZFJH04). （2022ZFJH04）
