槽式聚光型纳米流体集热器性能评估  

Performance Evaluation of Trough Concentrating Nanofluid Collectors

作　　者：李振全[1] 惠善康[1] 徐亮 余田 LI Zhen-quan;HUI San-kang;XU Liang;YU Tian(Suzhou Institute of Builiding Science Group Company Limited,Suzhou 215129,Jiangsu,China)

机构地区：[1]苏州市建筑科学研究院集团股份有限公司,江苏苏州215129

出　　处：《建筑节能》2019年第2期72-76,共5页BUILDING ENERGY EFFICIENCY

摘　　要：建立了纳米流体集热器集热的数值模型,揭示了集热效率随纳米流体入口流速增加的变化规律,并将模拟结果与实验结果进行对比,模拟结果与实验数据相吻合,证明了模型在一定范围的可行性。模拟结果表明:在低速范围内,纳米流体集热效率随流速的增加而增大,入口流速为0. 047 5 m/s时集热效率为59. 21%,0. 08 m/s时为59. 37%,0. 13 m/s时达到最大为59. 42%,此后随着纳米流体入口速度增大集热效率降低。A numerical model of heat collector for Nanofluidic collectors is established. The law of heat collection efficiency with increasing flow rate at the Nanofluid inlet is revealed. The simulation results are compared with the experimental results. The simulation results are in good agreement with the experimental data. To some extent, the accuracy of the model is proved. The simulation results show that in the low speed range, the Nanofluid collector efficiency increases with the increase of flow rate. The heat collection efficiency ranges from 59.21 % to 59.37 %, when the inlet flow velocity ranges from 0.047 5 m/s to 0.08 m/s . Besides, the heat collection efficiency reaches maximum of 59.42 % at the velocity of 0.13 m/s . After that, the collector efficiency decreases as the Nanofluid inlet velocity increases.

关 键 词：纳米流体 太阳能集热 入口流速 集热效率 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程] TK511[动力工程及工程热物理—热能工程]