摘要
基于计算流体动力学中的有限体积法,研究了Al_(2)O_(3)/Syltherm800导热油纳米流体作为传热介质时槽式太阳能热发电集热器的性能,建立了真空管集热器的三维模型,进行了光学模拟和传热数值模拟,并通过实验进行了验证。在非均匀热流密度分布的情况下,研究了进口温度、进口流速等运行参数对采用纳米流体的槽式集热器传热性能的影响规律。结果表明:随着Al_(2)O_(3)体积分数的增加,槽式集热器的换热性能及热效率均有所提高;进口温度、进口流速等运行参数对集热器的传热性能影响很大,随着进口温度的上升和进口流速的减小,纳米流体对传热性能的影响程度逐渐增大。
Based on the finite volume method in computational fluid dynamics,the performance of the t rough solar thermal power col lector wi th Al 2O3/Syltherm800 oil nanofluid as heat transfer fluid was studied.A three-dimension model of the vacuum collector was established,optical simulation and heat transfer numerical simulation were carried out and verified by experiments.Under the condition of non-uniform heat flux distribution,the influence of inlet temperature and inlet velocity on the heat transfer performance of the trough collector with nanofluid was studied.The simulation results show that the heat transfer performance and heat efficiency of the trough collector are improved with the increase of Al_(2)O_(3)volume fraction.The heat transfer performance of the collector is greatly influenced by the inlet temperature and the inlet velocity.With the increase of inlet temperature and the decrease of inlet velocity,the influence of the nanofluid on the heat transfer performance increases gradually.
作者
刘尧东
张燕平
万亮
高伟
LIU Yaodong;ZHANG Yanping;WAN Liang;GAO Wei(School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei Province,China;China-EU Institute for Clean and Renewable Energy,Huazhong University of Science and Technology,Wuhan 430074,Hubei Province,China)
出处
《发电技术》
2021年第2期230-237,共8页
Power Generation Technology
基金
国家国际科技合作专项项目(2014DFA60990)。
关键词
太阳能热发电
槽式集热器
纳米流体
传热性能
solar thermal power generation
trough collector
nanofluid
heat transfer performance
