Study on concentric tube heat exchanger heat transfer performance using Al2O3 – water based nanofluids
Study on concentric tube heat exchanger heat transfer performance using Al2O3 – water based nanofluids
复制标题
Al2O3-水基纳米流体同心管换热器传热性能研究
DOI：
10.1016/j.icheatmasstransfer.2013.10.001
复制
发表时间：
2013
影响因子：
7
通讯作者：
K. Wasewar
中科院分区：
文献类型：
--
作者：
S. Sonawane;Rohit S. Khedkar;K. Wasewar
研究了Al 2 O3-水纳米流体作为冷却剂在同心管换热器中的传热特性。热交换器由长度为1000 mm的铜同心内管制成。纳米流体是以水为基液，以纳米颗粒Al 2 O3为载体的混合物。将纳米流体在同心管换热器中的冷却结果与基础流体的冷却结果进行了比较。考虑了热流体入口流量、纳米流体的雷诺数和组成对同心管换热器的影响。据观察，作为冷却介质的纳米流体的平均传热速率高于作为冷却介质的水的平均传热速率，并且这随着纳米流体的组合物的浓度而增加。本研究结果对于低热流密度冷却系统中同心管换热器的高效设计具有重要的技术意义。
In the present study, the heat transfer characteristics of Al2O3– water nanofluids as a coolant used in concentric tube heat exchanger are presented. The heat exchanger is fabricated from copper concentric inner tube with a length of 1000 mm. The nanofluids are the mixture of water as base fluid and Al2O3particles in nanorange. The results obtained from the nanofluids cooling in concentric tube heat exchanger are compared with those from base fluids. The effects of inlet flow rate of hot fluids, Reynold's number and composition of nanofluids on concentric tube heat exchanger are considered. It is observed that average heat transfer rates for nanofluids as cooling media are higher than those for the water as cooling media, and this increases with concentration of nanofluids' composition. The results of this study have technological importance for the efficient design of concentric tube heat exchanger to enhance cooling performance at low heat flux cooling systems.