带翅片双层管槽式太阳能梯级集热系统性能分析  

Performance Analysis of Parabolic Trough Receiver with Inner Tube and Fins for Solar Cascade Heat Collection

作　　者：刘鹏[1,2,3] 马海文 巫云雷[1,2,3] 陈林根 LIU Peng;MA Haiwen;WU Yunlei;CHEN Lingen(Institute of Thermal Science and Power Engineering,Wuhan Institute of Technology,Wuhan 430205,China;Hubei Provincial Engineering Technology Research Center of Green Chemical Equipment,Wuhan 430205,China;School of Mechanical&Electrical Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学热科学与动力工程研究所,武汉430205 [2]湖北省绿色化工装备工程技术研究中心,武汉430205 [3]武汉工程大学机电工程学院,武汉430205

出　　处：《工程热物理学报》2024年第10期3143-3150,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.52206108,No.52171317);博士后科学基金面上项目(No.2020M672344)。

摘　　要：本文提出了一种带翅片的双层管槽式太阳能梯级集热系统(强化PTR),并建立数值模型研究其流动、传热和集热性能,在翅片体积一定的条件下,研究了翅片的结构参数对强化PTR性能的影响规律。研究结果表明,相较于传统PTR,强化PTR在整个圆周上,吸热管外壁面的温度和朝外热流密度显著降低。在本文研究的翅片结构参数范围内,强化PTR的传热性能和流动阻力增加为光滑圆管的1.83~3.45和3.99~7.25倍且综合传热性能为1.16~1.78;强化PTR的热损降低了42.4%~47.8%,泵耗功率增加了331%~691%,集热效率提高了1.71%~1.93%;高温/低温流体集热率的取值范围分别为55.12%~55.69%和15.31%~15.69%。In this paper,a double-layer tube trough solar cascade heat collection system(enhanced PTR)with fins is proposed,and a numerical model is established to study its flow,heat transfer and heat collection performance.Under the condition of a certain fin volume,the influence of the structural parameters of the fins on the enhanced PTR performance is studied.The results show that,compared with the traditional PTR,the temperature of the outer wall of the absorption tube and the outward heat flux of the enhanced PTR are significantly reduced on the entire circumference.Within the range of fin structure parameters studied in this paper,the heat transfer performance and flow resistance of enhanced PTR are increased to 1.83∼3.45 and 3.99∼7.25 times of smooth tube and the comprehensive heat transfer performance is 1.16∼1.78.The heat loss of enhanced PTR decreases by 42.4%∼47.8%,pump power consumption increased by 331%∼691%,heat collection efficiency increased by 1.71%∼1.93%.The range of heat collection efficiencies of hightemperature/low-temperature fluid are respectively 55.12%∼55.69%and 15.31%∼15.69%.

关 键 词：双层管 梯级集热系统 翅片 集热效率 

分 类 号：TK123[动力工程及工程热物理—工程热物理]